СТЕКЛО ДЛЯ СТЕКЛОКРИСТАЛЛИЧЕСКОГО ЦЕМЕНТА

Стекло для стеклокристаллического цемента рекомендуется использовать в приборостроении и радиоэлектронной промышленности для спаев с лангаситом (La2Ga5SiO14 ) в производстве высокотемпературных резонаторов. Стекло включает компоненты при следующем соотношении, маc. %: SiO2 30,5-35, 5; В2Оз 6,5-7,5; А12Оз 7,0-8,0; BaO 28,5-30,5; ZnO 20,5-22,0; МgО 0,5-1,5; CdO 0,5-1,5. Температурный коэффициент линейного расширения стеклокристаллического цемента 50•10-7К-1, температура кристаллизации и спаивания 820-850oС, температура деформации 1050oС. 1 табл.

СПОСОБ ИЗГОТОВЛЕНИЯ КАМЕННЫХ И СТЕКЛОКРИСТАЛЛИЧЕСКИХ ИЗДЕЛИЙ И МАТЕРИАЛОВ

Каменные и стеклокристаллические материалы или изделия из силикатных или других расплавов получают литьем или формованием с последующей кристаллизацией для получения архитектурно-отделочных материалов. Литье и формование изделий и материалов производятся из расплавов, имеющих плотность закристаллизовавшегося из данного расплава материала, близкую или равную плотности стекла из этого же расплава. Техническая задача изобретения - получение плотного материала, устранение усадочных пор и раковин и снижение себестоимости изделий. 1 табл.

СПОСОБ ПРОИЗВОДСТВА СТЕКЛОКЕРАМИЧЕСКОЙ ПЛИТКИ ИЗ ИСПОЛЬЗОВАННОЙ ФУТЕРОВКИ ТИГЛЕЙ ДЛЯ ВЫПЛАВКИ АЛЮМИНИЯ (ВАРИАНТЫ) И СТЕКЛОКЕРАМИЧЕСКАЯ ПЛИТКА

Настоящее изобретение относится к способу производства стеклокерамических плиток и составу плиток. Использованную футеровку тиглей для выплавки алюминия, содержащую углеродсодержащий материал, фтор и стеклообразующие материалы, подвергают окислению при условиях, пригодных для сжигания углеродсодержащего материала и частичного улетучивания фтора в стеклообразущих материалах. Окисленные стеклообразующие материалы переводят в стекловидное состояние для образования стеклянного расплава. Этот стеклянный расплав затем формуют в плитки, содержащие фтор. Технический результат: снижение энергозатрат и получение полезного продукта. 3 с. и 20 з.п. ф-лы, 6 ил, 3 табл.

СПОСОБ ПОЛУЧЕНИЯ СТЕКЛОКРЕМНЕЗИТА

Изобретение относится к способу получения стеклокремнезита. Способ получения стеклокремнезита включает подготовку стеклогранулята, засыпку его в форму, спекание и отжиг. Перед засыпкой в форму осуществляется смешение стеклогранулята, глины и колеманита при массовом соотношении 16:3:1-16:3:2 соответственно, а спекание происходит при 680-710°С. Технический результат – увеличение прочности на сжатие. 4 табл.

КАМЕННОЕ ЛИТЬЕ

Изобретение относится к технологии силикатов, в частности к составам каменного литья, используемого в строительстве. Каменное литье включает следующие компоненты, мас.%: SiO2 50,0-53,0; TiO2 1,0-2,0; Al2O3 12,0-14,0; Fe2O3 1,0-2,0; MnO2 0,5-1,5; MgO 13,5-14,5; CaO 5,0-6,0; K2O 0,5-1,0; Na2O 0,5-1,0; Cr2O3 0,5-1,0; В2О3 3,0-4,0; P2O5 5,0-7,5. Технический результат изобретения - повышение прочности каменного литья. 1 табл.

ШЛАКОСИТАЛЛ

Использование: в качестве строительного материала. Сущность изобретения: шлакоситалл содержит следующие компоненты, мас.%: оксид кремния 57 - 66 БФ SiO2; оксид алюминия 10 - 18 БФ Al2O3; оксид кальция 10 - 13,6 СаО; оксид титана 0,4 - 1 БФ TiO2; оксид железа 4 - 6 БФ Fe2O3, оксид калия 2 - 3 БФ К2О; оксид цинка 6 - 10 БФ ZnO. Характеристика шлакоситалла: водоустойчивость 99,7 - 99,9%. 1 табл.

СТЕКЛОКРИСТАЛЛИЧЕСКИЙ МАТЕРИАЛ ДЛЯ НАПОЛЬНОЙ И ОБЛИЦОВОЧНОЙ ПЛИТКИ

Изобретение относится к стеклокристаллическому материалу для напольной и облицовочной плитки. Технический результат изобретения заключается в ускорении процесса плавления, повышении прочности на сжатие, улучшении термостойкости и химической стойкости. Стеклокристаллический материал получен из расплавленной с помощью воздушной плазмы шихты. В состав материала плитки входят следующие компоненты, мас.%: SiO2 - 57,6-62,71; Al2O3 - 20,3-28,3; Fe2O3 - 4,9-5,32; CaO - 4,8-12,8; MgO - 1,7-1,89; Li2O - 0,56-0,7; TiO2 - 2. 2 табл.

СТЕКЛОКРИСТАЛЛИЧЕСКИЙ МАТЕРИАЛ ДЛЯ СВЧ-ТЕХНИКИ

Изобретение относится к области стеклокерамики, в частности к высокотемпературным радиопрозрачным стеклокристаллическим материалам (ситаллам) для СВЧ-техники, предназначенным для изготовления средств радиосопровождения в авиационно-космической и ракетной технике. Техническим результатом изобретения является снижение термического коэффициента линейного расширения, стабилизация диэлектрической проницаемости и тангенса угла диэлектрических потерь, повышение предела прочности при центрально-симметричном изгибе. Стеклокристаллический материал для СВЧ-техники включает SiO, AlO, TiO, MgO и SiOв виде плакированного TiOаэросила, при следующем соотношении компонентов, мас.%: SiO- 35,5-38,3; SiOв виде плакированного TiOаэросила - 0,1; AlO- 22,8-25,5; TiO- 16,1-18,8; MgO - 20,0-22,8. 2 табл.

ДЕКОРАТИВНО-ОБЛИЦОВОЧНЫЙ МАТЕРИАЛ

Изобретение относится к составам декоративно-облицовочных материалов. Технический результат изобретения заключается в повышении морозостойкости декоративно-облицовочного материала. Декоративно-облицовочный материал включает, мас.%: измельченное листовое стекло; 75,0-77,0 молотый туф 18,0-19,0; жидкое калиевое стекло 5,0-6,0. 1 табл.

СПОСОБ ЛОКАЛЬНОЙ МИКРОКРИСТАЛЛИЗАЦИИ ОКСИДНЫХ СТЕКОЛ

Изобретение относится к области оптического материаловедения, в частности к способу локальной кристаллизации легированных стекол под действием лазерного излучения. Техническим результатом изобретения является осуществление возможности кристаллизации стекла. Способ локальной микрокристаллизации оксидных стекол осуществляют с использованием стекла с легирующей добавкой NdOв концентрации от 0,3 до 3%(мол.). Применяют импульсный лазер на парах меди, генерирующий одновременно желтую и зеленую линии с суммарной средней мощностью от 5 до 15 Вт, частотой следования импульсов до 12,8 кГц. Пучок лазера перемещают относительно образца, помещенного в печь и нагретого до температуры на 10-150°C ниже температуры стеклования выбранных составов стекол в мол. %, а именно: LaO22-24,7, ВО24,5-25,5, GeO49,5-50,5, NdO0,3-3 или LiO 23,7-25,3, ВО24,3-25,8, GeO49,2-50,7, NdO1-3 (сверх 100%) или LiO 29,8-30,3, NbO24,7-25,5, SiO44,5-45,8, NdO1,5-3 (сверх 100%). 3 ил., 4 пр.

СПОСОБ ПОЛУЧЕНИЯ ПОРИСТЫХ СТЕКЛОМАТЕРИАЛОВ ИЗ ЗОЛОШЛАКОВЫХ ОТХОДОВ

Изобретение относится к области переработки твердых отходов, в частности золошлаковых отходов ТЭЦ, и может использоваться в строительной индустрии для получения пористых строительных материалов различного назначения. С целью повышения эксплуатационных качеств пористых стекломатериалов, получаемых из золошлаковых отходов, шихту следующего состава, вес.%: CaOобщий 5,0 -41,0, CaOсвободный 4,0 - 13,0, SiO2 13,0 - 75,0 Al2O3 5,0 -26,0, углерод 3,0 - 8,0, Fe2O3 1,0 - 24,0, MgO 2,0 - 6,0, Na2O 0,1 - 1,0, R2O 0,2 - 1,0, SO3 0,1 - 0,6, TiO2 0,2, нагревают до температуры плавления и плавят в восстановительной среде. Полученный расплав охлаждают посредством "термоудара" с одновременным формированием пористой структуры стекломатериала в регулируемом потоке газовой среды, а "термоудар" осуществляют контактированием расплава с водным раствором солей в щелочной среде. В качестве солей используют растворимые соли меди с концентрацией иона Cu2+ 0,5 - 1,0 г-ион/л, а pH раствора при "термоударе" выдерживают ...

КОМПОЗИЦИЯ ДЛЯ ИЗГОТОВЛЕНИЯ ДЕКОРАТИВНО-ОБЛИЦОВОЧНОГО МАТЕРИАЛА

Композиция для основного слоя декоративно-облицовочного материала, содержащая гранулы стекла и стеклокристаллический щебень, отличающаяся тем, что дополнительно содержит волластонит, при следующем соотношении компонентов, мас.%: гранулы стекла 10,0-15,0; стеклокристаллический щебень 65,0-75,0; волластонит 15,0-20,0.

Низкотемпературный стеклокерамический материал и способ его изготовления

Изобретение относится к производству стеклокерамического композиционного материала и может использоваться в электротехнической и радиотехнической промышленности, в производстве корпусов и подложек для интегральных схем и многослойных керамических плат многокристальных керамических модулей (МКМ). В заявленном составе стеклокерамический материал содержит низкотемпературное кристаллизующееся стекло и алюмооксидную керамику при соотношении (1,4-1,0):(0,6-1,0) соответственно. Низкотемпературное кристаллизующееся стекло дополнительно содержит оксид хрома при следующем соотношении компонентов, мас.%: SiO20-34, ВаО 34-40, BO23-26, СаО 1-10, SnO1-10, а также сверх 100% оксид хрома (CrO) 2-5 и оксид алюминия (AlO) 5-10. Оксид алюминия и оксид хрома перед составлением шихты предварительно смешивают и прокаливают при температуре 1300-1400°С. Низкотемпературный стеклокерамический материал после смешения с органической связкой и формования в виде изделий с токоведущими элементами (металлокерамический ...

СПОСОБ ПОЛУЧЕНИЯ ПЛОСКОГО СТЕКЛОКРИСТАЛЛИЧЕСКОГО МАТЕРИАЛА

... 1. Способ получения плоского стеклокристаллического материала из силикатного расплава путем его формования, кристаллизации на расплавленной подложке с защитным слоем из неорганического материала и отжига, отличающийся тем, что в качестве неорганического материала защитного слоя используют материал, температурный коэффициент термического расширения которого и готового плоского стеклокристаллического изделия различаются на величину (15-50) 10-7oC-1.

ЛИТИЕВО-СИЛИКАТНЫЕ СТЕКЛОКЕРАМИКА И СТЕКЛО С ОКСИДОМ ПЯТИВАЛЕНТНОГО МЕТАЛЛА

... 1. Литиево-силикатная стеклокерамика, включающая в себя оксид пятивалентного металла, выбранный из NbO, TaOи смесей таковых, и включающая в себя менее 2,0 масс.% КО.2. Стеклокерамика по п. 1, за исключением литиево-силикатной стеклокерамики, которая включает в себя, по меньшей мере, 6,1 масс.% ZrO.3. Стеклокерамика по п. 1 или 2, за исключением стеклокерамики, которая включает в себя, по меньшей мере, 8,5 масс.% оксида переходного металла, выбранного из группы, состоящей из оксидов иттрия, оксидов переходных металлов, имеющих атомный номер 41-79 и смесей этих оксидов.4. Стеклокерамика по п. 1 или 2, которая включает в себя менее 1,0, в частности, менее 0,5 масс.%, и, предпочтительно, менее 0,1 масс.% КО, и, наиболее предпочтительно, являющаяся, по существу, свободной от КО.5. Стеклокерамика по п. 1 или 2, которая включает в себя менее 1,0, в частности, менее 0,5 масс.%, и, предпочтительно, менее 0,1 масс.% NaО, и, наиболее предпочтительно, являющаяся, по существу, свободной от NaО.6. Стеклокерамика ...

СТЕКЛОКЕРАМИЧЕСКИЙ МАТЕРИАЛ НА ОСНОВЕ ДИСИЛИКАТА ЛИТИЯ, СПОСОБ ЕГО ПОЛУЧЕНИЯ И ПРИМЕНЕНИЕ

... 1. Стеклокерамический материал на основе дисиликата лития, имеющий следующий состав:от 55 до 70 вес.% SiO,от 10 до 15 вес.% LiO,от 10 до 20 вес.% стабилизатора, выбираемого из группы, состоящей из ZrO, HfOили их смеси,от 0.1 до 5 вес.% KO,от 0.1 до 5 вес.% AlO,от 0 до 10 вес.% добавок, выбираемых из группы, состоящей из оксида бора, оксида фосфора, фтора, оксида натрия, оксида бария, оксида стронция, оксида магния, оксида цинка, оксида кальция, оксида иттрия, оксида титана, оксида ниобия, оксида тантала, оксида лантана и их смесей, а такжеот 0 до 10 вес.% красителей.2. Стеклокерамический материал на основе дисиликата лития по п.1, отличающийся тем, что красители представляют собой окрашивающие стекло оксиды и/или пигменты.3. Стеклокерамический материал на основе дисиликата лития по п.2, отличающийся тем, что окрашивающие стекло оксиды выбирают из группы оксидов железа, титана, церия, меди, хрома, кобальта, марганца, селена, серебра, индия, золота, редкоземельных металлов, в частности, неодима ...

ШЛИКЕР

... 1. Шликер, содержащий керамический порошок, воду, стеклобой, борат кальция, отличающийся тем, что дополнительно содержит жидкое стекло и окись цинка при следующем соотношении компонентов, мас.%: керамический порошок 15,0-25,0; вода 50,0-55,0; стеклобой 5,0-15,0; борат кальция 5,0-15,0; жидкое стекло 2,0-3,0; окись цинка 2,0-3,0.2. Шликер по п.1, отличающийся тем, что в качестве керамического порошка использована смесь глины и шамота в соотношении 1:3.

СПОСОБ ПОЛУЧЕНИЯ АМОРФНЫХ И КЕРАМИЧЕСКИХ МАТЕРИАЛОВ ПУТЕМ ВЫТЯГИВАНИЯ РАСПЛАВА

... 1. Способ изготовления керамики, в состав которой входит стекло, предусматривающий контактное соприкосновение расплава с поверхностью вращающейся основы таким образом, что расплав охлаждается с формированием керамики, в состав которой входит стекло; при этом расплав включает в себя, по меньшей мере, 35 вес.% Al2O3 от общей массы содержащего в расплаве оксида металла, первый оксид металла, отличный от Al2O3 и второй оксид, отличный от Al2O3, при этом расплав содержит не более 10 вес.% As2О3, В2О3, GeO2, P2O5, SiO2, TeO2, и V2O5, в совокупности от общего содержания оксида металла в расплаве; а также стекла, содержащего, по крайней мере, 35 вес.% Al2O3, от общего содержания оксида металла в стекле, первый оксид металла, отличный от Al2О3 и второй оксид, отличный от Al2O3, при этом стекло содержит не более 10 вес.% As2O3, В2О3, GeO2, P2O5, SiO2, TeO2, и V2O5, в совокупности от общей массы стекла. 2. Способ по п.1, отличающийся тем, что стекло имеет размеры х, y, и z, взаимно перпендикулярные ...

Стекло для ситаллоцемента

Изобретение отсносится к области технологии силикатов и предназначено для создания кристаллизующихся покрытий стальных подложек и межслойной изоляции многоуровневых коммутационных плат. С целью повышения водостойкости и стабилизации диэлектрических характеристик при многокоатных циклах обжига стекло имеет следующий состав, мас.%: SiOa 19,6-23,9; AI203 3,1-5,1; В20з 3,9-5,6; ВаО 43,6-49,4; СаО 5,5-12.8; СгсОз 0,5-0,9; Со20з 0,4-0,8; CdO 4,7-9,5; ZnO 4,2-6,4. Стекло относится к гидролитическому классу, тангенс угла диэлектрических потерь при повторных циклах термообработки (до 31 цикла) имеет значение (8-12) . 1 табл.

Стекло

Изобретение относится к технологии силикатов, к производству кристаллизующегося бариевого алюмоборосиликатного стекла, предназначенного для использования в микроэлектронике в качестве ситаллоцемента для межслойной изоляции толстопленочных микросхем. С целью повышения кристаллизационной способности и температуры размягчения, улучшения водоустойчивости стекло включает следующие компоненты, мас.%: SIO25,0 - 12,0 B2O330,0 - 34,0 AL2O318,0 - 20,0 BAO 27,0 - 31,0 IN2O34,0 - 5,0 TIO25,0 - 8,0. Стекло кристаллизуется в интервале температур 750 - 900°С, имеет температуру размягчения 620 ± 10°С, водоустойчивость 99,0 - 99,5%. 1 табл.

Стекло для пеноматериала

Несущий слой декоративно-облицовочного материала

COMPOSITION FOR BASE LAYER OF DECORATIVE FACING MATERIAL

ASH-SLAGGY DEVITRIFIED GLASS

Композиция для получения несущего слоя декоративно-облицовочного материала

Изобретение относится к промышленности строительных материалов, а именно к производству облицовочных и художественно-декоративных изделий на основе стекла и наполнителя. С целью снижения объемной массы и повышения коэффициента конструктивного качества композиция для получения несущего слоя декоративно-облицовочного материала включает, мас.%: кремнеземсодержащую породу от вскрыши фосфоритов 35 - 70 стеклогранулят 30 - 65. Полученный материал обладает прочностью при сжатии 166 - 212 кг/см2, прочностью при изгибе 76 - 95 кг/см2, объемной массой 850 - 1000 кг/м3и коэффициентом конструктивного качества 7,6 - 8,82 МПа. 2 табл.

Reabsorbing phosphate glass and ceramics bio material - contg. phosphorous pent-, calcium-, magnesium-, sodium- and potassium oxide(s) for tissue and bone replacement

Ceramics contain 27.1-39.9 (mol.%) P2O5, 22.5-36.0 CaO, 14.5-30.0 R2O and 5.0-25.0 MgO, where R2O contains up to 30 mol.% Na2O and up to 12.0 mol.% K2O. Reabsorbing phosphate glass ceramics comprise main crystalline phases of Ca-ortho phosphate and/or Ca- and/or Na-diphosphate, and glass phase, and reabsorbing phosphate glasses and ceramics have a sealed or porous structure. USE/ADVANTAGE - Bone replacement.

Verwendung einer Glas-Keramik-Beschichtung als Schutzschicht gegen Sauerstoff bei Temperaturen oberhalb von 1000°C

Thermisch keramisierbares Glas, daraus hergestellte Glaskeramik und Verfahren zu dessen Herstellung.

VERFAHREN ZUR UNTERDRUECKUNG DER CRISTOBALITPHASE IN LITHIUMALUMINIUMSILIKAT-GLASFRITTEN

Glaskeramiken mit niedriger Dielektrizitätskonstante gebrannt bei niedrigen Temperaturen

BIOLOGISCH AKTIVE GLAS- UND GLASKERAMIK-ZUSAMMENSETZUNG SOWIE EIN HIERMIT UEBERZOGENES IMPLANTAT

Formen von faserverstärkten Gegenständen durch Einspritzung.

Verfahren zur Umwandlung von Abfallstoffen in kristallisiertes Glas

Optokeramiken, daraus hergegestellte optische Elemente bzw. deren Verwendung sowie Abbildungsoptik

Die vorliegende Erfindung betrifft Optokeramiken und daraus hergestellte refraktive, transmittive oder diffraktive optische Elemente, ihre Verwendung bzw. eine Abbildungsoptik. Diese Optokeramiken und optischen Elemente sind für sichtbares Licht und/oder für Infrarotstrahlung durchlässig. Die Optokeramiken bestehen aus einem Kristallverbund, d. h. aus polykristallinem Material, wobei mindestens 95 Gew.-%, vorzugsweise mindestens 98 Gew.-%, der einzelnen Kristallite eine kubische Pyrochlor- oder Fluoritstruktur aufweisen.

Stoff zur Herstellung dielektrischer Filme

Glass ceramic having a specified relative permittivity used in the production of electrical components comprises a ceramic material, and a glass material containing a boron oxide, a silicon oxide, a divalent metal oxide, and a bismuth oxide

Glass ceramic having a relative permittivity of 600-10,000 comprises at least one ceramic material, and at least one glass material containing at least one oxide with boron, at least one oxide with silicon, and at least one oxide with at least one divalent metal Me<2+>. The glass material also has at least one oxide with bismuth. An Independent claim is also included for an electrical component (5) comprising the above glass ceramic. Preferred Features: The divalent metal is beryllium, magnesium, calcium, strontium, barium, copper and/or zinc.

Glaskeramik

Entglasendes Loetglas

Hochhitzebestaendige Glaeser niedriger Waermeausdehnung und daraus hergestellte Keramik

Glaskeramikmaterial und seine Herstellung und Anwendung

Grillvorrichtung mit Wärmequellen-Schutzschild sowie Wärmequellen-Schutzschild zur Abschirmung von Heizelementen vor Nahrungsmittelrückständen

Grillvorrichtung (1) mit Heizelementen (7) und einem zwischen Grillgut und den Heizelementen (7) angeordneten Wärmequellen-Schutzschild (2) zur Abschirmung der Heizelemente (7) vor Nahrungsmittelrückständen, die beim Grillen entstehen, wobei das Wärmequellen-Schutzschild (2) ein Glas- oder Glaskeramik-Substrat (3) mit zumindest einer grillgutseitigen Beschichtung (4) aufweist, die die Diffusion von Stoffen aus Belägen, die durch die Verbrennung von Nahrungsmittelrückständen auf dem Wärmequellen-Schutzschild (2) entstehen, in das Glas- oder Glaskeramik-Substrat (3) hinein vermindert oder sogar ganz verhindert, so dass das Wärmequellen-Schutzschild (2) eine Langzeitbeständigkeit von zumindest zwei Monaten im Dauerbetrieb bei zumindest 500°C aufweist, wobei die Beschichtung (4) eine Sauerstoff-Permeationsrate von weniger als 1 cm3pro m2Beschichtungsoberfläche, pro Bar Druckdifferenz, pro nm Schichtdicke und pro Tag aufweist und wobei die Beschichtung (4) mittels eines chemischen oder physikalischen ...

GLAESER, GLASKERAMIKEN UND VERFAHREN ZU DEREN HERSTELLUNG

TRANSPARENTE, MIT VANADIUMOXID-ZUSATZ DUNKEL EINFÄRBBARE GLASKERAMIK

Zr02-haltige Glaskeramik

Verfahren zur Herstellung porzellanaehnlichen Glases

Verfahren zur Herabsetzung des Ausdehnungskoeffizienten von Steatit

Kristallisiertes Glas-Substrat, und Informationsaufzeichnungsmedium unter Verwendung des kristallisierten Glas-Substrats

MULTIPLEXER/ABZWEIGFILTER

Emailfrittezusammensetzung für eine Glaskeramik mit niedriger Ausdehnung und damit hergestellte emailbeschichtete Glaskeramikplatte mit niedriger Ausdehnung

Glasprodukte und Verfahren zur Herstellung

GLASKERAMISCHER GEGENSTAND UND VERFAHREN ZU SEINER HERSTELLUNG

PORZELLANZUSAMMENSETZUNG

Glas sowie Verfahren zu seiner Herstellung und Verwendung desselben

Die Erfindung bezieht sich auf ein Glas, das floatbar, thermisch vorspannbar und in eine Glaskeramik mit Hochquarz-Mischkristallen oder Keatit-Mischkristallen umwandelbar ist. Um störende Oberflächeneffekte beim Floaten zu vermeiden und überlegene Eigenschaften des Glases bzw. der Glaskeramik insbesondere hinsichtlich eines kleinen Wärmeausdehnungskoeffizienten und hoher Lichttransmission zu erzielen, weist das Glas einen Gehalt von weniger als 300 ppb Pt, weniger als 30 ppb Rh, weniger als 1,5 Gew.-% ZnO und weniger als 1 Gew.-% SnO¶2¶ auf, ist bei der Schmelze ohne Verwendung der üblichen Läuterungsmittel Arsen- und/oder Antimonoxid geläutert und hat seine Formgebung durch Aufgießen auf ein flüssiges Metall in einer reduzierten Atmosphäre erhalten. DOLLAR A Die Erfindung betrifft neben dem floatbaren, thermisch vorspannbaren und in eine Glaskeramik mit Hochquarz-Mischkristallen oder Keatit-Mischkristallen umwandelbaren Glas ein Verfahren zu seiner Herstellung sowie Verwendungen des Glases ...

Glaskeramik

Die Erfindung betrifft ein Glas und eine Glaskeramik mit Hochquarz- und/oder Keatit-Mischkristallen und ein Verfahren zu deren Herstellung sowie deren Verwendung als Trägermaterial für die Beschichtung. Glaskeramik mit Hochquarz- und/oder Keatit-Mischkristallen mit einer Oberflächenrauhigkeit ohne Polieren von Ra < 50 nm, einer thermischen Ausdehnung im Temperaturbereich zwischen 20 DEG C und 300 DEG C von < 1,2 È 10·-6·/K, einer Transmission im nahen Infrarot bei 1050 nm von > 85% bei 4 mm Dicke und einer Zusammensetzung in Gew.-%, bezogen auf die Gesamtzusammensetzung, enthaltend: DOLLAR A Li¶2¶O 3,0-5,5 DOLLAR A Na¶2¶O 0-2,5 DOLLAR A K¶2¶O 0-2,0 DOLLAR A SIGMA Na¶2¶O + K¶2¶O 0,5-3,0 DOLLAR A SIGMA MgO + ZnO < 0,3 DOLLAR A SrO 0-2,0 DOLLAR A BaO 0-3,5 DOLLAR A B¶2¶O¶3¶ 0-4,0 DOLLAR A Al¶2¶O¶3¶ 19,0-27,0 DOLLAR A SiO¶2¶ 55,0-66,0 DOLLAR A TiO¶2¶ 1,0-5,5 DOLLAR A ZrO¶2¶ 0-2,5 DOLLAR A SIGMA TiO¶2¶ + ZrO¶2¶ 3,0-6,0 DOLLAR A P¶2¶O¶5¶ 0-8,0 DOLLAR A Fe¶2¶O¶3¶ < 200 ppm DOLLAR A F 0-0,6 als ...

UV-Strahlung absorbierende, antimikrobielle, entzündungshemmende Glaskeramik, Verfahren zu ihrer Herstellung und ihre Verwendungen

Die Erfindung betrifft eine Glaskeramik, wobei das Ausgangsglas DOLLAR A 40-60 Gew.-% SiO¶2¶ DOLLAR A 5-30 Gew.-% Na¶2¶O DOLLAR A 0-20 Gew.-% K¶2¶O DOLLAR A 5-30 Gew.-% CaO DOLLAR A 0-10 Gew.-% MgO DOLLAR A 0-5 Gew.-% Al¶2¶O¶3¶ DOLLAR A 2-10 Gew.-% P¶2¶O¶5¶ DOLLAR A 0-5 Gew.-% B¶2¶O¶3¶ DOLLAR A 0,1-10 Gew.-% TiO¶2¶ DOLLAR A umfaßt. DOLLAR A Die Erfindung ist dadurch gekennzeichnet, daß die kristallinen Hauptphasen Alkali-Erdalkali-Silicate umfassen.

Photstructurable body and process for treating glass and/or a glass-ceramic

GLASS-CERAMIC ARTICLES

... 1,203,469. Glass ceramics. CORNING GLASS WORKS. 4 Sept., 1967 [14 Sept., 1966], No. 40319/67. Heading C1M. A glass-ceramic body contains an analogue of alpha-cristobalite as the principal crystal form, the crystals being formed in situ from a glass body consisting essentially in weight percentages of: SiO 2 55-90; Al 2 O 3 5-40 and Li 2 O 0À5-3, the sum of Al 2 O 3 and SiO 2 constituting at least 90%. Up to 9% total, preferably not more than 5%, of one or more of the following oxides may be included: ZnO, PbO, BeO, MnO, CdO, P 2 O 5 , MgO. B 2 O 3 and fluorine, if used, should be in amounts less than 3%. Formation of the crystals may be in two-step nucleation and crystallization temperatures with suitable dwell times, examples being given for different compositions, but the crystals may be developed by a gradual, constant, increase in temperature from room temperature or from just below the transformation point, the rate of increase not exceeding 5‹ C./minute.

GLASS CERAMIC ARTICLES

... 1,203,930. Glass-ceramics. CORNING GLASS WORKS. 4 Sept., 1967 [14 Sept., 1966], No. 11338/70. Divided out of 1,203,469. Heading C1M. A glass-ceramic body contains an analogue of beta-cristobalite as the principal crystal form, the crystals being formed in situ from a glass body consisting essentially, in weight percentages, of: SiO 2 55-90; Al 2 O 3 5-40, the sum of SiO 2 and Al 2 O 3 constituting at least 90%, and 1-5 total of at least one oxide selected from CaO, CuO and SrO. Up to 3% of Li 2 O may be included. Up to 9% total, preferably not more than 5%, of one or more of the following oxides may be included: ZnO, PbO, BeO, MnO, CdO, P 2 O 5 , MgO, B 2 O 3 and fluorine if used should be in amounts less than 3%. Formation of the crystals may be in two-step nucleation and crystallization temperatures with suitable dwell times, examples being given, but the crystals may be developed by a gradual, constant increase in temperature from room temperature or from just below the transformation ...

GLASS CERAMICS

... 1419068 Glass ceramics TRADE & INDUSTRY SECRETARY OF STATE FOR 15 Dec 1972 [17 Dec 1971] 58629/71 Heading C1M A glass ceramic material having a lifetime at 1100‹ C. of at least 20 hours to 0À2% strain and/ or at least 60 hours to 0À3% strain under a bend stress of 77 MN/m.2 is formed from a composition comprising, by weight, 40-55% SiO 2 , 25- 37% Al 2 O 3 , 8-15% MgO, 0-5% ZnO, 4-14% TiO 2 , 0-10% ZrO 2 , not greater than 0À15% CaO, not greater than 0À2% Na 2 O, not greater than 0À3% K 2 O, and not greater than 0À2% Li 2 O, wherein the total amount of CaO, Na 2 O, K 2 O and Li 2 O is not greater than 0À3%, the balance, if any, consisting of other compatible ingredients. These levels of alkali metal and calcium are low compared with what is normal in the constituent raw materials and accordingly it is necessary in the production of the glass ceramics to use raw materials which permit the overall concentration of alkali metal and calcium (in the products) to fall within the stated ...

GLASSES AND GLASS-CERAMICS AND PRODUCTS MADE THEREFROM

... 1399211 Glass ceramics; joining glass to glass OWENS-ILLINOIS Inc 25 May 1972 [25 May 1971 28 Feb 1972] 24579/72 Heading C1M A thermally crystallizable glass capable of being thermally in situ crystallized to a glassceramic which is thermally stable at temperatures of about 1500‹ F. for at least 1000 hours and maintains its modulus of rupture of at least 10,000 p.s.i. at such temperatures for said times, said glass being zinc oxide free and comprising 98-100% by weight of the following ingredients 55-80% SiO 2 , 12-27% Al 2 O 3 , Li 2 O 32-7À6, nucleating agent 3-9, the balance, if any, consisting of other compatible ingredients, each of said compatible ingredients not exceeding 0À5% by weight of the weight of the glass, said balance containing less than 0À1% by weight of the weight of the glass of fluorine and no more than 0À5% by weight of the weight of the glass of Na 2 O + K 2 O, wherein said nucleating agent is a mixture of TiO 2 + ZrO 2 and said ZrO 2 is present in an amount 0À5-2À8% ...

Improvements in or relating to insulating coatings of glass

... 1,146,171. Glass - coated electric wires. ENGLISH ELECTRIC CO. Ltd. 6 June, 1967 [10 June, 1966], No. 25950/66. Addition to 1,136,404. Heading C1M. The process of Specification 1,136,404 (that is, the coating of a wire 11 by glass by passing it through molten glass in a bead formed in loop 17) is used to coat and to insulate twisted wires 11. A multiplicity of wires may be thus treated. Instead of a resistance-heated loop 17 the glassmelting zone may be formed by two electrodes bridged by molten glass through which electricity is conducted.

Transparent or translucent inorganic material withhigh transmission in the 2700-3300nm wavelength

GLASS OR CRYSTALLINE MATERIAL HAVING PHOTOTROPIC APPLICATION

... 1428736 Phototropic glass CARL-ZEISSSTIFTITNG [trading as JENAER GLASWERK SCHOTT & GEN] 18 April 1973 18816/73 Heading C1M [Also in Divisions B2 and C4] A glassy or crystalline material, which is essentially a homogeneous, single-phase material and exhibits phototropic properties when applied in a thin layer of up to 50 Ám in thickness to a translucent support, consists of 1-60 gram atom per cent of copper, 2À5-65 gram atom per cent of silver, 8-85 gram atom per cent of chlorine and/or bromine, and optionally one or more additives chosen from Zr, Si, Mg, Al, La, Se and Te. The material may be applied to the support, which may be glass, polyvinylbutyral or polymethylmethacrylate, by, e.g. vapour deposition from a melt at 675-880‹ C. The material may correspond to a eutectic mixture of silver bromide and copper bromide. The optional additive may be capable of shifting the spectral sensitivity of the material (i.e. Se or Te) and the said additives preferably should not total more the 35 parts ...

LIGHT TRANSMITTING CALCIUM PHOSPHATE GLASS-CERAMICS

Hybrid laminate

A hybrid laminate comprises: a substrate layer containing a compact of first powders; and a functional material layer being in contact with the substrate layer and containing a compact of second powders; wherein the compact of the first powders comprises a glass material; the compact of the second powders comprises a ceramic material having at least one specific electric property selected from dielectricity, magnetism, resistivity and insulation; at least a part of the first powders is in a sintered state; and the second powders are in an unsintered state and are bonded together by diffusion or a flow of a part of the material of the substrate layer into the functional material layer.

OXIDATION RESISTANT COMPOSITE ARTICLE

GLASS AND GLASS-CERAMIC PRODUCTS

... 1291488 Reinforced and foamed glass CORNING GLASS WORKS 30 Dec 1969 63223/69 Heading C1M Glass or glass-ceramic having at least a surface portion which is non-porous and exhibits rubber-like characteristics the glass consisting of an alkali metal silicate containing at least in its surface portion from 5 to 30 wt. per cent of water and the glass ceramic consisting of an alkali metal silicate or an alkali metal barium silicate containing in its surface portion 2 to 15% by weight of water. Alkali metal silicate glasses suitable may have the following compositions in mole per cent on the oxide basis, exclusive of the water contained in its volume; 60-94% SiO 2 and 6-40% R 2 O wherein R 2 O consists of Na 2 O, K 2 O and mixtures thereof and the total SiO 2 +R 2 O constitutes at least 85% of the composition; 78-85% SiO 2 , 13-19% R 2 O, wherein R 2 O consists of Na 2 O, K 2 O and mixtures thereof, and 2-5% F 2 , with at least one photosensitive metal in the indicated proportion in excess of ...

GLASS FOR MANUFACTURING CRYSTALLINE GLASS MATERIALS

... 1333214 Glass ceramics G P BLOKHINA and M I NEIMAN 7 Dec 1970 [5 Sept 1969] 43988/69 Heading C1M A glass ceramic is formed by heat treatment of articles made from a glass consisting essentially of (1) SiO 2 and/or B 2 O 3 and/or Al 2 O 3 ; (2) SrO and/or BaO and/or CaO; (3) PbO; (4) TiO 2 ; (5) Nb 2 O 5 ; (6) MgO 0-15% by weight; (7) ZnO 0-5% by weight; (8) Bi 2 O 3 0-5% by weight; (9) MnO 2 0-5% by weight; (10) BeO 0-8% by weight; (11) Alkali metal oxides 0-10% by weight; the total amount of components (2), (3), (4) and (5) being from 40 to 95% by weight of the glass. Ranges of compositions are given as follows in percentages by weight: Nb 2 O 5 25-60; PbO 8-20; SiO 2 10-17; TiO 2 4-16; SrO 0-25; BaO 0-20 with optional additions of (1) MgO 2-8; (2) ZnO 1-5; (3) MgO 2-8; Bi 2 O 3 1-3; MnO 2 1-3.

GLASS-CERAMIC ARTICLE

... 1350776 Life rafts OWENS-ILLINOIS Inc 21 April 1971 [22 April 1970] 10389/71 Heading B7A [Also in Divisions F2 F4 B1 and C1] A cellular matrix having a diversity of applications is formed of glass-ceramic tubes 22 fused together to provide a series of smoothwalled longitudinal passages the walls of which have an average coefficient of lineal thermal expansion of about -12 to +12 x 10-7/‹C. (0-300‹ C.) and a thermal conductivity at 400‹ C. of less than 0À01 cal/cm/sec/cm2/‹C., wherein the inner diameter (defined in the specification) of said passages is at least 3 times the wall thickness through portions of said walls common to adjacent fused tubes. Preferably the matrix has an open frontal crosssectional area of at least 60%. The matrix passages may be open or closed at one or both ends. Typical tube dimensions are, inner diameter 0À1 inch, and wall thickness 0À03 to 0À002 inch. The use of larger tubes up to 3 inches diameter is mentioned. When fused together (after suitably ...

GLAZE

... 1389833 Glass composition; glazing JOHNSON MATTHEY & CO 9 March 1972 [19 March 1971] 7326/71 Heading C1M A glass frit coposition comprises in per cent by weight 10-25% PbO, 40-60% SiO 2 , 10-25% B 2 O 3 , 1-5% Li 2 O, 5-15% A. 2 O 3 , 1-5% Na 2 O and 1-7À5% ZrO 2 , the balance, if any, consisting of other compatible constituents, The preferred glass composition comprises 16À6% PbO, 15À7% B 2 O 3 , 51À1% SiO 2 , 1À7% Li 2 O, 8À4% Al 2 O 3 , 2À8% Na 2 O and 3À7% ZrO 2 . The glass frit obtained from the above composition may be communated the resultant particles having a surface area of 6000-12,000 sq. cm./ gm. and passing a sieve of 150 B.S. mesh and then applied to substrates which on firing produces a glaze. Such glazes are "metal-release free" or "metal release-resistant". By "metalrelease" is meant the transfer of certain metals, e.g., Pb and Cd, from a design layer via the glaze and/or from the glaze itself. The glaze is especially suitable for application as an "overglaze" on to glazed ...

SEALING GLASS COMPOSITIONS

... 1359050 Glass composition PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 Dec 1971 [30 Dec 1970 (2)] 60314/71 Heading C1M [Also in Division B3] A sealing glass consists in mol per cent of SiO 2 4-20; B 2 O 3 20-45; Li 2 O 5-10; ZnO 30-55; Al 2 O 3 0-5 and CaO + SrO + BaO 0-10. Such a glass is produced by melting a mixture consisting of in weight per cent SiO 2 3-16; B 2 O 3 18-41; Li 2 CO 3 4À5-10; ZnO 33-60; Al 2 O 3 0-7 and CaCO 3 +SrCO 3 +BaCO 3 0-25. A ceramic (e.g. Al 2 O 3 or BeO) element can be sealed to a ceramic substrate having a metal (e.g. Au or an Fe-Ni-Co alloy) pattern thereon by depositing a layer of the glass by means of a suspension on a surface of the ceramic element, pre-melting the glass at a temperature of between 800 and 1100‹ C., placing the element on the substrate and heating for several minutes at a temperature which is less than 800‹ C. The glass layer may be deposited on the substrate by forming a frit thereof suspended in an organic liquid (e.g. alcohol, ...

PARTIALLY CRYSTALLIZED GLASSES AND PRECURSORS THEREOF

... 1390888 Dielectric composition E I DU PONT DE NEMOURS & CO 21 Sept 1973 [22 Sept 1972] 44386/73 Heading C1M [Also in Division H1] A composition for printing dielectric layers comprises 1-40% by weight of calcium titanate and 60-99% by weight of a glass frit, which frit comprises by weight 25-40% SiO 2 , 5-15% TiO 2 , 7-12% Al 2 O 3 , 10-30% BaO, 10-26% ZnO, 2-10% CaO, 2-8% B 2 O 3 , 0-2% MgO, and 0-4% Bi 2 O 3 , BaO and ZnO together constituting 30-40 of the said glass frit. The composition may be printed on to prefired metallized ceramic dielectric substrates either dry or in the form of a suspension in an inert liquid vehicle, e.g. a mixture of ethyl cellulose and terpineol. Generally 0À4-9 parts by weight of solids per part by weight of vehicle is used, whilst the composition preferably has an average particle size of 1-15 microns. Generally screen or stencil techniques are employed. After application of the composition the printed substrate is refired, e.g. at 800-950‹C., producing ...

Manufacture of sealing glasses

... 1,136,498. Sealing glass. OWENS-ILLINOIS Inc. 25 Aug., 1966 [17 Nov., 1965],No. 38167/66. Heading C1M. A glass comprising 70-80% PbO; 10-15% ZnO; 7-10% B 2 O 3 ; 1-3% BaO and 1-3% SiO 2 , for sealing glass to glass for cathoderay tubes is produced by blending a glass batch comprising lead oxide, zinc oxide, boric acid, barium carbonate and silica sand or compounds containing oxides of the said elements; melting and fining the batch constituents into a uniform homogeneous molten mass under oxidizing conditions in a substantially enclosed noble metal lined melting chamber; continuously discharging and air dividing a stream of molten glass so produced into discrete individual droplets; pressing the droplets between a pair of cooled rolls into flattened chips; grinding the chips into powder form; screening, regrinding and rescreening oversize particles and intimately blending and rescreening the powder form into a uniform sealing glass product having a fineness less than 100 U.S. mesh. The ...

Glass composition

A copper phosphate water soluble glass composition. The composition of the glass may be adjusted so as to release copper at a uniform preselected rate and to produce a desired pH in the resultant solution. In one application of the glass copper may be supplied to an animal from an implant formed from a cupric oxide/phosphorus pentoxide glass which also incorporates one or more glass modifying oxides such as alkali metal oxides and alumina, to control the glass solubility. Suitable glasses comprise 5-55 mole % cupric oxide + alkali metal oxides. 45-75 mole % phosphorus pentoxide, and not more than 15 mole % alumina, where the copper oxide concentration is not less than 5 mole %.

Improvements in or relating to devitrified glass-ceramics and their production

Glass-ceramic articles are formed from a glass having as major constituents, at least 90% by weight, SiO2 45 to 82; Al2O3 10 to 36; Li2 0 to 25; MgO 0 to 32 with optional minor constituents consisting of Na2O and/or K2O 0 to 5; ZnO 0 to 10; CaO 0 to 5; B2O3 0 to 10 with, as nucleating agent, an oxide of tungsten and/or an oxide of molybdenum or a metallic phosphate together with an oxide from the oxides of tungsten and/or molybdenum and/or vanadium and/or titanium, the glass article being heat-treated by raising its temperature progressively in a single stage to a temperature at which devitrification takes place so as to form a predominantly micro-crystalline glass-ceramic material. Specific examples are given.

Leucite glass ceramics

A leucite glass-ceramic is disclosed which is prepared from a glass comprising: about 66.8 to about 71.9 mol % of Si02, about 8.5 to about 10.3 mol % of A1203, about 9.5 to about 12.8 mol % of K2O, about 0.5 to about 4.0 mol % of CaO, about 0 to about 3.0 mol % of TiO2, about 1.9 to about 4.0 mol % of Na2O, about 0.1 to about 2.0 mol % of Li2O, about 0 to about 1.0 mol % of MgO, about 0 to about 3.0 mol % of Nb205, and about 0 to about 3.0 mol % of B2O3. The leucite glass-ceramic is prepared by subjecting the glass components to a nucleation heat treatment, followed by a growth heat treatment, The leucite glass-ceramic may be used in the fabrication of a dental restoration using various processes, and may be used in the construction of dental restorations such as ceramic dental inlays, crowns, veneers, bridges, veneering materials for zirconium oxide restoration substrates, alumina oxide restoration substrates, or metal restoration substrates.

BIOLOGICALLY ACTIVE GLASS

GLASS CERAMIC

MANUFACTURING LOW TEMPERATURE FIRED CERAMICS

Method for Etching Glass

... 1,153,447. Etching. CORNING GLASS WORKS. 31 May, 1966 [8 June, 1965], No. 24259/66. Heading B6J. [Also in Division C1] The surface of a glass substrate is etched by applying to at least a portion of the surface a frit of a thermally devitrifiable sealing glass, subjecting the frit coated substrate to heat treatment at a temperature sufficiently high for the frit to be fuzed and to wet the substrate and for the frit to be thermally devitrified, but which is below a value at which the substrate would be warped or distorted, cooling the substrate so that the sealing glass forms a glaze on its surface and then removing the glaze and reaction products formed between the substrate and the vitreous or glassy matrix of the glaze. The removal may be effectively dissolving the glaze in dilute acid, e.g. nitric acid. The sealing glass may be applied to the substrate by spraying, dipping or silk screening.

Ceramic Bonding

... 1,154,267. Ceramic-metal seals. GENERAL ELECTRIC CO. 25 Oct., 1967 [31 Oct., 1966], No. 48610/67. Addition to 1,051,008. Heading B3V. [Also in Division C1] A glass composition for bonding ceramic materials to one another or to refractory metals consists of alumina, calcia and magnesia in proportions in percentage by weight to fall within the area on a ternary phase diagram defined by lines between the points (A) 52-4 Al 2 O 3 , 35À9 CaO, 11À7MgO, (B) 52À4 Al 2 O 3 , 40À7 CaO, 6À9 MgO and (C) 60À2 Al 2 O 3 , 35À4 CaO, 4À4 MgO with the exception of the compositions falling within the area consisting of alumina 52 to 56; calcia 36À5 to 40À5 and magnesia 5À5 to 9À5. The compounds are particularly useful for sealing sodium and caesium vapour lamps made from polycrystalline alumina to metal caps such as of niobium, tungsten, molybdenum or tantalum.

Method of producing a Glass Body having a Semi-Crystalline Surface

GLASS CERAMICS

HIGH STRENGTH LAMINATED BODIES

... 1324477 Glass laminate CORNING GLASS WORKS 20 Aug 1971 [28 Aug 1970] 39127/71 Heading CIM A laminated article composed of a plurality of fused adjacent laminµ each comprising a glass or glass-ceramic, in which the outermost lamina is compressively stressed, the innermost lamina is tensilely stressed and each lamina exhibits a state of stress opposite to the laminµ adjacent thereto, is produced by melting a batch for each layer and simultaneously combining the melts to form a laminated structure at a temperature at which the viscosity of the innermost lamina is less than the viscosity of the outermost lamina within the range 1 : 1 to 1 : 6. The temperature for combining the melts is between 1200‹ and 1350‹ C. The ratio of the thickness of the innermost layer to the outermost layer is between 10 : 1 and 30 : 1 for a three-ply article. In an article consisting of more than three lamina the ratio of the total thickness of the tensilely stressed laminµ to the total thickness of the compressively ...

ARMOUR MATERIALS

A method of manufacturing a whitish granular aggregate for building purposes from a crystallisable, vitreous material

In the manufacture of granular aggregate for building or roads, a mixture of a crystallizable vitreous material and quartz sand in a ratio down to 1: 5 is heated in a rotary kiln to melt the vitreous material so as to embed the sand, the material being subsequently crystallized. The sand and vitreous material may be mixed before being fed to the kiln or the sand may be injected into the kiln at a position just before the highest temperature is reached, this causing stoppage of growth of the nodules formed in the kiln. The crystals may be formed by slow cooling in the same kiln, or preferably, by withdrawing the mixture as by quenching in water followed by re-heating in a further kiln to effect crystallization. The mixture may contain small amounts of fluxing or nodulizing agents such as clay, soda or water-glass. The vitreous material is preferably at least 60% SiO2, at least 20% CaO, remainder other metal oxides. Glass given is SiO2 67; CaO 25; MgO 3; Al2O3 3; Fe2O3 1; Na2O + K2O 1, all ...

Manganese cordierite glass-ceramics

An impervious sintered cordierite glass-ceramic comprises (in molar proportions) from 1,7 to 2.4 RO, from 1.9 to 2.4 Al2O3 and from 4.5 to 5.2 SiO2, wherein RO comprises from 10 to 75 mole percent MgO and from 90 to 25 mole percent MnO. The glass-ceramic may be prepared by: formulating a raw batch of the appropriate composition; melting the raw batch to give a glass; producing powder from the glass; fashioning the powder into a desired shape; and firing the shaped powder to a temperature of from 950 to 1300 DEG C to sinter it to an impervious glass-ceramic product. The glass-ceramics exhibit low thermal expansion coefficients of SIMILAR 15x10<-7>/C DEG (25-1000 DEG C) and high electrical resistivity.

PRODUCTION OF OPAL GLASS

... 1493456 Opal glass CORNING Ltd 27 May 1976 [12 June 1975] 25283/75 Heading ClM A spontaneously opacifying glass comprises (weight per cent): the total of alkali metal oxides being less than 12. The K 2 O content is preferably 0-4. The glass may optionally include up to 6À5 B 2 O 3 , up to 5À3 BaO, up to 5 ZnO, up to 0À5 ZrO 2 , up to 1À5 Cl, up to 0À5 CaO and/or up to 0À2 Sb 2 O 3 or As 2 O 3 . The molten glass may be shaped by a process involving very rapid cooling (e.g. in an automatic press machine), the opalescence developing during such cooling. The glass may be formed into articles of tableware.

CORDIERITE GLASSES AND GLASS-CERAMICS

... 1493669 Powdered glass; glass-ceramics CORNING GLASS WORKS 31 Oct 1975 [3 March 1975] 45240/75 Heading ClM A powdered glass consists essentially of, in mole per cent: where MO is at least one of CaO, BaO, SrO and PbO, MgO+MO is at least 23À6, and the Al 2 O 3 content exceeds that of MO by 21À0-24À0. The glass may be of particle size up to 150Á (preferably 4-40 Á). A glass-ceramic article comprising, as the sole crystal phase, crystals of a structure corresponding to hexagonal cordierite may be obtained by sintering the said powdered glass at 900-1050‹ C. for “-12 hours. Articles with such a glassceramic coating may be obtained by applying the powdered glass to a substrate and sintering at 900-1050‹ C. for “-12 hours. The substrate may be a glass, ceramic or glass-ceramic (e.g. a lithium aluminosilicate with beta-spodumene solid solution as principal crystal phase).

PANEL OF ANISOTROPIC GLASS CERAMIC AND METHOD FOR ITS MANUFACTURE

... 1517445 Anisotropic glass-ceramic BATTELLE MEMORIAL INSTITUTE 22 July 1976 [22 July 1975] 30575/76 Heading C1M A panel of anisotropic glass-ceramic, having acicular crystals oriented perpendicular to the panel faces and traversing the panel from one face to the other, is made by heating a layer 5 of crystallizable vitreous material, supported on molten metal 4, to above the crystallization range and establishing a temperature gradient through the thickness of the panel so that the upper face is at a lower temperature than the metal-contacting face, and cooling the panel (e.g. at not more than 3‹ C. per minute) while maintaining the temperature gradient substantially constant, so that successive layers of the panel crystallize, starting from the upper panel face, to form the acicular crystals oriented perpendicular to the said face. The panel 5 and molten metal 4 may be disposed in a graphite susceptor 3, the panel 5 being placed in a graphite ring 6 and the chamber being closed by graphite ...

Composite article and method of joining preformed parts to form such article

... 822,272. Joining ceramic articles. CORNING GLASS WORKS. Jan. 23, 1957 [Feb. 1, 1956], No. 2484/57. Drawings to Specification. Class 87(1) [Also in Groups XXIII and XXXVI] Preformed ceramic parts are joined together by sealing glass which is subsequently devitrified. The sealing glass should be a soft glass, and when used for joining glass parts, e.g. the panel and funnel of a cathode ray tube, should have a softening temperature at least 40‹C. below the sealing temperature and preferably below the annealing temperature of the glass parts. It may be applied to the parts to be joined by powdering and mixing with a binder to form a suspension, coating the parts and subsequently heating. After formation of a seal by heating the assembly to a predetermined temperature the sealing glass is devitrified by heating it for a further period either at the sealing temperature or a higher temperature, depending on the type of glass, until at least part of the glass is converted to a crystalline phase ...

Improvements in or relating to vitreous materials

... 795,731. Vitreous materials. WELWYN ELECTRICAL LABORATORIES, Ltd. Feb. 16,1956 [Feb. 25, 1955], No. 5764/55. Drawings to Specification. Class 56. A vitreous dielectric material containing crystalline matter consists of 50-70 per cent by weight of the oxides of Ti, Ba, Pb, Sn, Ca, Sr; 6-25 per cent by weight of at least one oxide or fluoride of Na, K, Li ; and the remainder being oxides of Si, Sb, Zr, Mg and, optionally, at least one of P 2 O 5 , B 2 O 3 and alkali earth fluoride the amounts of any fluorides being not more than 6 per cent by weight. The material has a softening point below 700‹C. (softening point being the temperature at which the viscosity is 10 12 poises or that at which the linear expansion is a maximum). It has a dielectric constant greater than 15, a power factor not greater than 0À003 and a temperature coefficient of capacitance of from + 300 to -500 parts per million per degree C. The material is made by heating the intimately mixed constituents in a non- reducing ...

Crystalline sintered element

... 883,287. Crystalline glass. ZEISS-STIFTUNG, CARL., [trading as JENAER GLASWERK SCHOTT & GEN.]. Feb. 19, 1960 [April 8, 1959], No. 6018/60. Class 56. A crystalline sintered element is produced by mixing a powdered silica-containing glass with an inorganic salt capable of promoting crystallisation of the glass and heating to sinter and devitrify the mass. A suitable glass contains: SiO 2 , 54%; B 2 O 3 , 3%; Al 2 O 3 , 27%; divalent metal oxide, 16%. This is finely ground and mixed with one of the following, also finely ground-lithium carbonate, aluminate or silicate, magnesium carbonate or silicate, aluminium nitrate-together with an organic binder such as paraffin wax dissolved in carbon tetrachloride. The mass is pressed into shape and then heated, first to evaporate the solvent and then to decompose the binder. The latter may be accelerated by the addition of decomposable oxidising agent such as ammonium nitrate. Successively higher temperatures then sinter the mass and devitrify it.

CRISTOBALITE SUPPRESSION IN HIGH-SILICA LI2O-AL2O3-SIO2 DEVITRIFIED GLASS FRITS

... 1493743 Glass-ceramics CORNING GLASS WORKS 31 Oct 1975 [10 Feb 1975] 45251/75 Heading C1M A glass-ceramic consisting essentially of, by weight, Li 2 O 3À5-5À5%, Al 2 O 3 15-22À5% and SiO 2 74-80%, and whose mole ratio Al 2 O 3 :Li 2 O is 1-1À5:1, is made by: (I) preparing one or more particulate glass frits, having the above composition in aggregate, by melting, quenching and comminuting raw materials; (II) shaping the frit(s) into a green article; and (III) firing at 1200-1350‹ C. to sinter the frit(s) to a coherent article and to crystallize the glass; the formation of cristobalite being suppressed by the addition, in step (I) or (II), of up to 0À01 moles (in total) per 100 gm. of glass frit(s) of one or more of Na 2 O, K 2 O, Cs 2 O, La 2 O 3 , Y 2 O 3 , Nb 2 O 5 , Ta 2 O 5 , B 2 O 3 and Sb 2 O 3 and up to 0À02 moles (in total) per 100 gm. of frit(s) of one or more of Mgo, CaO, SrO, BaO, TiO 2 , ZnO and PbO. A particulate crystalline seeding material may be added in step (II), e.g. up ...

BASALT-TYPE GLASS-CERAMIC FIBRES

Method of making a semicrystalline body, a semi-crystalline body, article comprising the semicrystalline body, and method of making it

... 905,253. Ceramic glass. CORNING GLASS WORKS. June 30, 1960 [July 1, 1959; May 18, 1960], No. 23000/60. Drawings to Specification. Class 56. [Also in Group XXXVI] A semi-crystalline ceramic body intended for use as a dielectric comprises, as to at least 30- 90%, the constituent oxides of at least one oxygen octahedra ferro-electric compound, at least 30% of the body being in the form of a crystalline phase uniformly dispersed in another phase, being crystallized in situ from a homogeneous glass, the body containing at least one glass-forming oxide. The percentages quoted are " cationic mol." figures, i.e. figures calculated in respect of molecules, or part molecules, containing one cationic atom, e.g. SiO 2 , AlO 1 . 5 . The glass-forming composition is melted, cooled and heat-treated to crystallize it. The temperature at which crystallization occurs is determined by " differential thermal analysis," i.e. observing discontinuities in the rate of change of temperature, during heating, as ...

SURFACE-DEVITRIFIED GLASS

... 1322796 Devitrified glass ENGLISH ELECTRIC CO Ltd 8 July 1971 [14 July 1970] 34113/70 Heading C1M [Also in Division B3] A method of making a surface-devitrified glass article comprises forming the article from a surface-devitrifiable glass, abrading the surface of the article so formed, and heat-treating the abraded article to form a devitrified surface layer. As described, articles in the form of blocks are cut from bars of ZnO-Al 2 O 3 -SiO 2 glass. The blocks are annealed and have their faces polished and are then placed in a beaker containing abrasive, such as sand or silicon carbide, vibrated at 50 HZ to form a " fluidized bed " for 15 to 60 mins., the abrasive being of 220 grit size. After abrading, articles are heated at 200‹ to 750‹ C. for 20 to 30 minutes to devitrify the surfaces which results in increasing the strength and/or transparency of the articles.

Glass having excellent resistance against surface damages and method for the production thereof

A glass having excellent resistance against surface damages is provided. The glass includes a content of alkaline earth oxides of at least 0.3% by weight and of P 2 O 5 of 0.1 to 4% by weight; the glass has at least one surface that has precipitations with a mean size of 1 to 20 μm. A method is further provided and includes melting a glass batch, yielding a glass melt, and casting the glass melt onto a float bath. The glass melt is maintained on the float bath at a temperature of above 1000° C. for at least 5 minutes, and yields glass. The glass has a content of alkaline earth oxides of at least 0.3% by weight and of P2O5 of 0.1 to 4% by weight, and the glass has at least one surface that has precipitations with a mean size of 1 to 20 μm.

Crystallized glass with negative coefficient of thermal expansion and method for manufacturing the same

A crystallized glass with negative coefficient of thermal expansion includes 38 wt % to 64 wt % of silica (SiO2); 30 wt % to 40 wt % of alumina (Al2O3); and 5 wt % to 12 wt % of lithium oxide (Li2O) as a basic component, and further includes more than one component selected from the group consisting of 0.5 wt % to 15 wt % of zirconia (ZrO2), 0.5 wt % to 6.5 wt % of titanium dioxide (TiO2), 0.5 wt % to 4 wt % of phosphorus pentoxide (P2O5), 2 wt % to 5 wt % of magnesium oxide (MgO), and 0 wt % to 5 wt % of magnesium fluoride (MgF2) in addition to the basic components. The crystallized glass may have a high negative coefficient of thermal expansion so that it has an advantage that it can be used as a thermal expansion compensation material according to the temperatures of all kinds of glasses and similar products thereof.

Transparent, dyed cooktop

A transparent, dyed cooktop is provided that has improved color display capability. The cooktop is made of a glass ceramic having high quartz mixed crystals as the predominant crystal phase, wherein the glass ceramic comprises none of the chemical refining agents arsenic oxide and/or antimony oxide, except for inevitable trace amounts. The glass ceramic has transmission values of greater than 0.1% in the range of visible light over the entire wavelength range greater than 450 nm, light transmission in the visible range of 0.8 to 5%, and transmission in the infrared at 1600 nm of 45-85%. The glass ceramic also includes a display apparatus that has a display device which is designed to display different operating conditions with different colours and/or symbols.

Lithium ion conductor, method of preparing the same, and lithium air battery including the lithium ion conductor

A lithium ion conductor, a method of preparing the same, and a lithium air battery including the lithium ion conductor. The lithium ion conductor includes a phosphorus-based compound having a characteristic peak at a Raman shift of about 720˜770 cm −1 on a Raman spectrum of the phosphorus-based compound.

Moldable Ceramics for Mass Spectrometry Applications

A glass ceramic including an alkali metal earth oxide, e.g. SrO suitable for overmolding a RF component provides a good RF response and good mechanical robustness. Specifically, SrO reduces the flow temperature of the ceramic while maintaining the RF and mechanical performance. The resulting glass formulation contains 10-50 mol % SrO, 5-30 mol % Al 2 O 3 , and 20-60 mol % B 2 O 3 .

TRANSPARENT GLASS CERAMIC EMITTING WHITE LIGHT AND PREPARATION METHOD THEREOF

A transparent glass ceramic emitting white light and preparation method thereof are provided. The chemical formula of the transparent glass ceramic is aSiO.bAlO.cNa.dCeF.xDyF, wherein a, b, c, d, and x are mole fractions, a is 35˜50, b is 15˜30, c is 5˜20, d is 5˜20, x is 0.01˜1, and a+b+c+d=100. The transparent glass ceramic can be substituted for the combination of epoxy resin or silica gel and fluorescent powder to seal LED. The transparent glass ceramic has strong excitation spectrum with broadband at ultraviolet area, and can emit strong white light under the excitation of ultraviolet light. 1. A transparent glass ceramic emitting white light , wherein said transparent glass ceramic emitting white light has the chemical formula of aSiO.bAlO.cNaF.dCeF.xDyF , wherein a , b , c , d , and x are mole fractions , a+b+c+d=100 , a is in the range of 35 to 50 , b is in the range of 15 to 30 , c is in the range of 5 to 20 , d is in the range of 5 to 20 , x is in the range of 0.01 to 1.2. A transparent glass ceramic emitting white light as in claim 1 , wherein a is in the range of 40 to 50 claim 1 , b is in the range of 20 to 30 claim 1 , c is in the range of 10 to 20 claim 1 , d is in the range of 10 to 20 claim 1 , x is in the range of 0.1 to 1.3. A preparation method of transparent glass ceramic emitting white light claim 1 , comprising:{'sub': 2', '2', '3', '3', '3, 'step 1: providing silica, alumina, sodium fluoride, cerium fluoride and dysprosium fluoride according to the stoichiometric ratio, said stoichiometric ratio is mole ratio of corresponding elements in the chemical formula of aSiO.bAlO.cNaF.dCeF.xDyF, wherein a is in the range of 35 to 50, b is in the range of 15 to 30, c is in the range of 5 to 20, d is in the range of 5 to 20, x is in the range of 0.01 to 1;'}step 2: mixing and grinding the compounds of step 1 uniformly, heating at high temperature, keeping the temperature constant to form mixed melt;step 3: pouring the mixed melt obtained in step 2 into ...

Display assembly comprising a glass-ceramic plate

Display assembly 1 comprising, on the one hand, a glass-ceramic plate 2 of the lithium aluminosilicate type, the optical transmission of which for a thickness of 4 mm is between 0.2% and 4% for at least one wavelength between 400 and 500 nm and, on the other hand, a luminous device 4, characterized in that the luminous device 4 comprises at least one polychromatic light source 5 having at least a first emission of nonzero intensity at said wavelength between 400 and 500 nm and at least a second emission of more than 500 nm, and such that the positioning of said source 5 is designed to allow display through said glass-ceramic plate 2.

Li2O-Al2O3-SiO2 BASED CRYSTALLIZED GLASS AND PRODUCTION METHOD FOR THE SAME

An object of the present invention is to provide a Li 2 O—Al 2 O 3 —SiO 2 based crystallized glass with excellent bubble quality even without using As 2 O 3 or Sb 2 O 3 as a fining agent and a method for producing the same. The Li 2 O—Al 2 O 3 —SiO 2 based crystallized glass of the present invention is a Li 2 O—Al 2 O 3 —SiO 2 based crystallized glass which does not substantially comprise As 2 O 3 and Sb 2 O 3 and comprises at least one of Cl, CeO 2 and SnO 2 , and has a S content of not more than 10 ppm in terms of SO 3 .

VITROCERAMIC GLASS COMPOSITIONS FOR GASKETS OF APPARATUSES OPERATING AT HIGH TEMPERATURES AND ASSEMBLING METHOD USING SAID COMPOSITIONS

A vitroceramic glass composition consisting of SiO, AlO, and CaO or of SiO, AlO, CaO and SrO or of SiO, AlOand LaOis provided. In addition, a method and assembly of at least two parts using said composition is provided. Also, a gasket and assembly obtained by this method as well as a high temperature electrolyzer (HTE) or solid oxide fuel cell (SOFC) comprising this gasket or this assembly are provided. 1. A vitro ceramic glass composition , wherein the composition is selected from the group consisting of: [{'sub': '2', '36 to 43% of SiO;'}, {'sub': 2', '3, '9 to 13% of AlO;'}, '38 to 50% of CaO; and of one or several oxide(s) selected from the group consisting of the following oxides in the following molar percentages:', '4 to 5% of ZnO;', {'sub': '2', '2 to 9% of MnO;'}, {'sub': 2', '3, '2 to 6% of BO;'}, {'sub': 2', '3, '0.1 to 1% of CrO;'}, {'sub': '2', '0.1 to 4% of TiO;'}], 'a glass composition (A) comprising molar percentages of [{'sub': '2', '43 to 48% of SiO;'}, {'sub': 2', '3, '4 to 5% of AlO;'}, '8 to 10% of CaO;', '34 to 39% of SrO; and optionally of one or several oxide(s) selected from the group consisting of the following oxides in the following molar percentages:', '4 to 5% of ZnO;', {'sub': '2', '2 to 9% of MnO;'}, {'sub': 2', '3, '2 to 5% of BO;'}, {'sub': 2', '3, '0.1 to 1% of CrO; and'}], 'a glass composition (B) comprising molar percentages of [{'sub': '2', '61 to 65% of SiO;'}, {'sub': 2', '3, '14 to 15% of AlO;'}, {'sub': 2', '3, '18 to 20% of LaO; and optionally of one or several oxide(s) selected from the following oxides in the following molar percentages, '4 to 5% of ZnO;', {'sub': '2', '4 to 5% of MnO;'}, {'sub': 2', '3, '2 to 3% of BO;'}, '4 to 5% of CaO', {'sub': 2', '3, '0.1 to 1% of CrO'}], 'a glass composition (C) comprising molar percentages of2. The glass composition according to claim 1 , which at the end of its elaboration and before any heat treatment only consists of an amorphous glassy phase.3. The glass composition according ...

GLASS CERAMICS FOR USE AS A DIELECTRIC FOR GIGAHERTZ APPLICATIONS

A glass-ceramic which is particularly suitable as dielectric for use in the high-frequency range, in particular as dielectric resonator, as electronic frequency filter element or as antenna element is disclosed. The glass-ceramic has at least the following constituents (in mol % on an oxide basis): 5-50% of SiO, 0-20% of AlO, 0-25% of BO, 0-25% of BaO, 10-60% of TiO, 5-35% of ReO, where Ba can be partly replaced by Sr, Ca, Mg, where Re is a lanthanide or yttrium and where Ti can be partly replaced by Zr, Hf, Y, Nb, V, Ta. 3. The glass-ceramic according to claim 1 , in which up to 10% of the barium is replaced.4. The glass-ceramic according to claim 1 , in which up to 10% of the titanium is replaced.5. The glass-ceramic according to claim 1 , which additionally contains from 0.01 to 3 mol % of at least one refining agent.6. The glass-ceramic according to claim 5 , in which the at least one refining agent is selected from the group consisting of SbOand AsO.7. The glass-ceramic according to claim 1 , which has a dielectric loss (tan δ) of not more than 10in the high-frequency range (frequency f>200 MHz).8. The glass-ceramic according to claim 1 , having a relative permittivity ∈ of at least 15.9. The glass-ceramic according to claim 1 , wherein the absolute value of the temperature dependence of the resonance frequency |τ| is not more than 200 ppm/IC.10. The glass-ceramic according to claim 1 , wherein the absolute value of the temperature dependence of the resonance frequency |τ| is not more than 10 ppm/K.11. The glass-ceramic according to claim 1 , which contains at least one mixed crystal phase based on RE claim 1 , Ti claim 1 , Si claim 1 , O claim 1 , Ba claim 1 , where Ba can be at least partly replaced by Sr claim 1 , Ca claim 1 , Mg claim 1 , where RE is a lanthanide or yttrium and where Ti can be at least partly replaced by Zr claim 1 , Hf claim 1 , Y claim 1 , Nb claim 1 , V claim 1 , Ta.12. The glass-ceramic according to claim 1 , which contains at least one ...

Li2O-Al2O3-SiO2-BASED CRYSTALLIZED GLASS

Provided is a Li 2 O—Al 2 O 3 —SiO 2 -based crystallized glass, comprising, as a composition in terms of mass %, 55 to 75% of SiO 2 , 20.5 to 27% of Al 2 O 3 , 2% or more of Li 2 O, 1.5 to 3% of TiO 2 , 3.8 to 5% of TiO 2 +ZrO 2 , and 0.1 to 0.5% of SnO 2 , and satisfying the relationships of 3.7≦Li 2 O+0.741MgO+0.367ZnO≦4.5 and SrO+1.847CaO≦0.5.

Transparent or transparent colored lithium aluminium silicate glass ceramic articles having adapted thermal expansion and use thereof

Transparent or transparent dyed lithium aluminium silicate (LAS) glass ceramic material is provided that has an adapted thermal expansion. The material includes high-quartz mixed crystals as the predominant crystalline phase, and a thermal expansion between room temperature and 700° C. from 1.0 to 2.5·10 −6 /K.

Beta-quartz glass ceramics and related precursor glasses

β-quartz glass-ceramics, the composition of which is most particularly optimized, with reference to the refining of their precursor glasses, with reference to good resistance to devitrification of said precursor glasses and with reference to their resistance to temperature ageing, articles comprising such glass-ceramics, lithium alumino-silicate glasses, which are precursors of such glass-ceramics, as well as methods for preparing such glass-ceramics and articles.

GLASS CERAMIC AS A COOKTOP FOR INDUCTION HEATING HAVING IMPROVED COLORED DISPLAY CAPABILITY AND HEAT SHIELDING, METHOD FOR PRODUCING SUCH A COOKTOP, AND USE OF SUCH A COOKTOP

A glass ceramic as cooktop for induction heating having improved colored display capability and heat shielding is provided. The cooktop includes a transparent, dyed glass ceramic plate having high-quartz mixed crystals as a predominant crystal phase. The glass ceramic contains none of the chemical refining agents arsenic oxide and/or antimony oxide and has a transmittance values greater than 0.4% at at least one wavelength in the blue spectrum between 380 and 500 nm, a transmittance >2% at 630 nm, a transmittance of less than 45% at 1600 nm, and a light transmittance of less than 2.5% in the visible spectrum. 19.-. (canceled)10. A glass ceramic suitable for use as a cooktop for induction heating having improved colored display capability and heat shielding , comprising:a transparent, dyed glass ceramic plate having high-quartz mixed crystals as a predominant crystal phase, wherein the glass ceramic plate contains none of the chemical refining agents arsenic oxide or antimony oxide, apart from inevitable traces; >0.4% at at least one wavelength in a blue spectrum between 380 and 500 nm,', '>2% at 630 nm,', '<45% at 1600 nm; and, 'transmittance values of the glass ceramic plate ofa light transmittance in a visible spectrum of less than 2.5%.11. The glass ceramic according to claim 10 , wherein the transmittance values of the glass ceramic plate comprises <40% at 1600 nm.12. The glass ceramic according to claim 10 , wherein the transmittance values of the glass ceramic plate of greater than 0.1% in the range of visible light in the entire wavelength range greater than 500 nm claim 10 , a transmittance of <12% at 630 nm claim 10 , a transmittance of greater than 30% in the near infrared at 950 nm claim 10 , and a transmittance of 0.5-2% in the visible spectrum.15. The glass ceramic according to claim 10 , further comprising a glass melt temperature of greater than 1700° C. and a bubble number of less than 3 bubbles/kg.16. The glass ceramic according to claim 15 , ...

TRANSPARENT LITHIUM GLASS-CERAMIC MATERIAL, PRODUCTION AND USE THEREOF

A lithium-containing, transparent glass-ceramic material is provided. The material has low thermal expansion and has an amorphous, lithium-depleted, vitreous surface zone. The zone is at least 50 nm thick on all sides and encloses a crystalline interior, which has high transmission. The material includes a transition region connecting the zone and the interior. 131-. (canceled)32. A lithium-containing , transparent glass-ceramic material that is smooth on all sides and has a low thermal expansion and a high transmission , the glass-ceramic material having an amorphous , lithium depleted , predominantly vitreous surface zone that is at least 50 nm thick on all sides and surrounds a crystalline interior , wherein the vitreous surface zone is connected to the crystalline interior by a transition region.33. The glass-ceramic material of claim 32 , wherein the vitreous surface zone has a thickness of 50 to 5000 nm.34. The glass-ceramic material of claim 32 , wherein the thickness is not more than 200 nm.35. The glass-ceramic material of claim 32 , comprising a principal crystal phase of more than 50% by weight of beta-quartz solid solutions.36. The glass-ceramic material of claim 35 , wherein the beta-quartz solid solutions have a lattice constant from 5.18 Å to 5.19 Å.37. The glass-ceramic material of claim 32 , wherein the vitreous surface zone comprises not more than 10% by weight of crystals and the crystalline interior comprises at least 50% by weight of crystals.38. The glass-ceramic material of claim 35 , further comprising a refractive index difference between a glass phase and the principal crystal phase claim 35 , in a range between 0.001 and 0.05.39. The glass-ceramic material of claim 32 , wherein the vitreous surface zone has a lower refractive index than the crystalline interior.40. The glass-ceramic material of claim 32 , further comprising a difference in refractive indices between a residual glass phase of the vitreous surface zone and a crystal phase of ...

Glass Substrate For Information Recording Medium

The present invention relates to the glass substrate for an information recording medium comprising the following glass components: SiO: 52 to 67; AlO: 8 to 20; BO: 0 to 6, with these three oxides FMO: 70 to 85; LiO: 0.5 to 4; NaO: 1 to 8; KO: 0 to 5; and with these three oxides R2O: 5 to 15; MgO: 2 to 9; CaO: 0.1 to 5; BaO: 0 to 3; SrO: 0 to 3; ZnO: 0 to 5; and with these five oxides: 5 to 15; YO: 0 to 4; LaO: 0 to 4; GdO: 0 to 4; CeO: 0 to 4; TiO: 1 to 7; HfO: 0 to 2; ZrO: 0 to 5; NbO: 0.2 to 5; and TaO: 0 to 5, and satisfies LiO/R2O: 0.05 to 0.35; LiO/FMO: 0.005 to 0.035; LiO/(MgO+ZnO): less than 2 and NbO/SiO: 0.01 to 0.075. 1. A glass substrate for an information recording medium , comprising the following glass components in % by weight:{'sub': '2', 'SiO: 52 to 67%;'}{'sub': 2', '3, 'AlO: 8 to 20%;'}{'sub': 2', '3, 'BO: 0 to 6% (including zero);'}{'sub': 2', '2', '3', '2', '3, '(wherein FMO═SiO+AlO+BO=70 to 85%);'}{'sub': '2', 'LiO: 0.5 to 4%;'}{'sub': '2', 'NaO: 1 to 8%;'}{'sub': '2', 'KO: 0 to 5% (including zero);'}{'sub': 2', '2', '2, '(wherein R2O═LiO+NaO+KO=5 to 15%);'}MgO: 2 to 9%;CaO: 0.1 to 5%;BaO: 0 to 3% (including zero);SrO: 0 to 3% (including zero);ZnO: 0 to 5% (including zero);(wherein MgO+CaO+BaO+SrO+ZnO=5 to 15%);{'sub': 2', '3, 'YO: 0 to 4% (including zero);'}{'sub': 2', '3, 'LaO: 0 to 4% (including zero);'}{'sub': 2', '3, 'GdO: 0 to 4% (including zero);'}{'sub': '2', 'CeO: 0 to 4% (including zero);'}{'sub': '2', 'TiO: 1 to 7%;'}{'sub': '2', 'HfO: 0 to 2% (including zero);'}{'sub': '2', 'ZrO: 0 to 5% (including zero);'}{'sub': 2', '5, 'NbO: 0.2 to 5%; and'}{'sub': 2', '5, 'TaO: 0 to 5% (including zero); and'} [{'br': None, 'sub': '2', 'LiO/R2O: 0.05 to 0.35\u2003\u2003(1),'}, {'br': None, 'sub': '2', 'LiO/FMO: 0.005 to 0.035\u2003\u2003(2),'}, {'br': None, 'sub': '2', 'LiO/(MgO+ZnO): less than 2\u2003\u2003(3) and'}, {'br': None, 'sub': 2', '5', '2, 'NbO/SiO: 0.01 to 0.075\u2003\u2003(4).'}], 'satisfying the following composition relation ...

CRYSTAL GLASS HAVING REFRACTIVE INDEX HIGHER THAN 1.53 WITHOUT A CONTENT OF COMPOUNDS OF LEAD, BARIUM AND ARSENIC

This invention relates to a crystal glass having a refractive index higher than 1.53 and a high mechanical strength, free of any content of compounds of lead, barium and arsenic and guaranteeing maximum safety for health, which consists in that it comprises by weight: 55-70% SiO, 0.05-3.5% LiO, 2-15% NaO, more than 3% and less than 5% or more than 15% and less than 19% KO, 5 to 10% CaO, more than 1% and less than 4% or more than 7% and less than 8% ZnO, 0.1-3.5% BO, 0.1-3.5% AlO, 0.1-3.5% TiO, less than 3.5% ZrO, 0.05-1.5% GdO,0.05-1% PO, 0.1-1% SbO, 2. The crystal glass according to claim 1 , comprising by weight 0.05 to 0.8 wt % GdOand 0.05 to 0.8% POand the GdO/POratio is at least equal to 1:1.3. The crystal glass according to claim 1 , comprising by weight 0.05 to 0.15 wt % GdOand 0.1 to 0.8% POand the GdO/POratio is at least equal to 1:2.4. The crystal glass according to claim 1 , comprising by weight 0.1 wt % GdOand 0.2 to 0.8% POand the GdO/POratio is at least equal to 1:2.5. The crystal glass according to claim 1 , wherein it is clarified and discoloured by usual clarifying and discolouring components and/or mixtures thereof in the usual concentrations. The invention relates to a crystal glass with a refractive index higher than 1.53 and high mechanical strength that does not contain any compounds of lead, barium and arsenic and intended for the production of artificial jewellery and chandelier semi-finished products and final products made from them. This glass is also intended for the manufacture of glass chandeliers and household items.This glass is characterized by a very good workability in melting, shaping and polishing, its brightness reaches at least 93%, its density is at least 2.54 g/cmand its Young's modulus of elasticity is above 90 GPa and it is characterized by increased chemical resistance, reduced solarization and reduced toxicity, ensuring maximum health safety in common use of the products from this glass.High-quality crystal glasses have ...

WHITE, OPAQUE BETA-SPODUMENE/RUTILE GLASS-CERAMIC ARTICLES AND METHODS FOR MAKING THE SAME

Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO; 10.5-17 AlO; 5-13 LiO; 0-4 ZnO; 0-8 MgO; 2-5 TiO; 0-4 BO; 0-5 NaO; 0-4 KO; 0-2 ZrO; 0-7 PO; 0-0.3 FeO; 0-2 MnOx; and 0.05-0.2 SnO. Additionally, these glasses and glass-ceramics exhibit the following criteria: 2. The glass-ceramic according to claim 1 , wherein the composition claim 1 , in mole % claim 1 , comprises:{'sub': '2', 'i. 67-74 SiO;'}{'sub': 2', '3, 'ii. 11-15 AlO;'}{'sub': '2', 'iii. 5.5-9 LiO;'}iv. 0.5-2 ZnO;v. 2-4.5 MgO;{'sub': '2', 'vi. 3-4.5 TiO;'}{'sub': 2', '3, 'vii. 0-2.2 BO;'}{'sub': '2', 'viii. 0-1 NaO;'}{'sub': '2', 'ix. 0-1 KO;'}{'sub': '2', 'x. 0-1 ZrO;'}{'sub': 2', '5, 'xi. 0-4 PO'}{'sub': 2', '3, 'xii. 0-0.1 FeO;'}xiii. 0-1.5 MnOx; and{'sub': '2', 'xiv. 0.08-0.16 SnO.'}4. The glass-ceramic according to claim 1 , wherein the at least one Ti-containing crystalline phase further comprises any one of anatase claim 1 , a magnesium titanate claim 1 , an aluminum titanate claim 1 , or mixtures of rutile and two or more of anatase claim 1 , a magnesium titanate claim 1 , and an aluminum titanate.5. The glass-ceramic according to claim 1 , further comprising cordierite or mixtures of rutile claim 1 , cordierite claim 1 , and one or more of anatase claim 1 , a magnesium titanate claim 1 , and an aluminum titanate.6. The glass-ceramic according to claim 1 , wherein the at least one Ti-containing crystalline phase comprises rutile comprising about 2-6 wt % of the crystalline phases of the glass-ceramic.7. The glass-ceramic according to claim 1 , wherein the one or more β-spodumene solid solutions comprises at least about 75 wt % of the crystalline phases of the glass-ceramic.8. The glass-ceramic according to claim 1 , wherein the optional one or more crystalline phase comprises:i. about 1-10 wt % of the ...

Crystallized glass

Provided is crystallized glass, comprising, as a glass composition in terms of mass %, 55 to 73% of SiO 2 , 17 to 25% of Al 2 O 3 , 2 to 5% of Li 2 O, 2.5 to 5.5% of TiO 2 , 0 to 2.3% of ZrO 2 , 0.2 to 0.9% of SnO 2 , and 0.005 to 0.09% of V 2 O 5 , wherein the crystallized glass is substantially free of As 2 O 3 and Sb 2 O 3 .

WHITE, OPAQUE, ß-SPODUMENE/RUTILE GLASS-CERAMICS; ARTICLES COMPRISING THE SAME; AND METHODS FOR MAKING THE SAME

Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO 2 ; 10.5-17 Al 2 O 3 ; 5-13 Li 2 O; 0-4 ZnO; 0-8 MgO; 2-5 TiO 2 ; 0-4 B 2 O 3 ; 0-5 Na 2 O; 0-4 K 2 O; 0-2 ZrO 2 ; 0-7 P 2 O 5 ; 0-0.3 Fe 2 O 3 ; 0-2 MnOx; and 0.05-0.2 SnO 2 . Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [ Li 2  O + Na 2  O + K 2  O + MgO + ZnO _ ]  [ Al 2  O 3 + B 2  O 3 ] between 0.7 to 1.5; b. a ratio: [ TiO 2 + SnO 2 _ ]  [ SiO 2 + B 2  O 3 ] greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity≧about 85% over the wavelength range of 400-700 nm for an about 0.8 mm thickness and colors an observer angle of 10° and a CIE illuminant F02 determined with specular reflectance included of a* between −3 and +3, b* between −6 and +6, and L* between 88 and 97.

PROCESS FOR OBTAINING A GLASS-CERAMIC MATERIAL THAT IS OPTICALLY TRANSPARENT IN THE INFRARED

A process is provided for obtaining a glassy material that is optically transparent to infrared radiation. The process includes: a step of amorphization, by mechanosynthesis, of an assembly of starting elements including at least one metallic element and at least one chalcogenide element, making it possible to form an amorphous powder; a step of hot densification, in a mould of predetermined dimensions, of the amorphous powder, making it possible to obtain a glass; and heat treatment, carried out during or after the hot densification step, in which the glass is heated to a temperature at which a portion of the glass is converted from an amorphous state to a crystalline state, making it possible to obtain, after cooling, a glass-ceramic. 1. A method for obtaining a material that is vitreous and optically transparent to infrared radiation , wherein the method comprises the following steps:amorphization, by mechanosynthesis, of a set of initial elements comprising at least one metallic element and at least one chalcogenide element, making it possible to form an amorphous powder;hot densification, in a molding device of predetermined dimensions, of the amorphous powder making it possible to obtain a glass; andthermal treatment, performed during or after said step of hot densification, in which said glass is heated to a temperature at which a part of said glass is converted from an amorphous state into an substantially crystalline state, making it possible to obtain, after cooling, a glass-ceramic type of massive glass.2. The method according to claim 1 , wherein said at least one metal element belongs to the group comprising: Ge claim 1 , As claim 1 , Sb claim 1 , Ga claim 1 , Sn claim 1 , In claim 1 , in a content of 0 to 35 mol % claim 1 , and wherein said at least one chalcogenide element belongs to the group comprising: S claim 1 , Se claim 1 , Te claim 1 , in a content of 40 to 90 mol %.3. The method according to claim 1 , wherein said set of initial elements ...

Glass-ceramic substrates for semiconductor processing

Embodiments are directed to glass-ceramic substrates with a III-V semiconductor layer, for example, a GaN layer that can be used in LED lighting devices. The glass-ceramics material is in the anorthite-rutile (CaAl 2 Si 2 O 8 +TiO 2 ) family or in the cordierite-enstatite (SiO 2 —Al 2 O 3 —MgO—TiO 2 ) family.

CERAMIC PARTICLE AND PROCESS FOR MAKING THE SAME

A ceramic particle with at least two microstructural phases comprising an amorphous phase, representing between 30 volume percent and 70 volume percent of the particle, and a first substantially crystalline phase comprising a plurality of predominately crystalline regions distributed through the amorphous phase is disclosed. A process for making the ceramic particle is also disclosed. 1. A sintered ceramic particle , comprising: at least two microstructural phases comprising an amorphous phase , representing between 30 volume percent and 70 volume percent of said particle , and a first substantially crystalline phase comprising a plurality of predominately crystalline regions distributed through said amorphous phase.2. The sintered ceramic particle of wherein said amorphous phase forms a continuous matrix through said particle and said crystalline regions collectively form a discontinuous phase.3. The sintered ceramic particle of wherein said amorphous phase has a coefficient of thermal expansion claim 2 , said first substantially crystalline phase has a coefficient of thermal expansion and said first substantially crystalline phase's coefficient of thermal expansion is no less than said amorphous phase's coefficient of thermal expansion.4. The sintered ceramic particle of wherein said first substantially crystalline phase's coefficient of thermal expansion is at least 5% greater than said amorphous phase's coefficient of thermal expansion.5. The sintered ceramic particle of wherein said first substantially crystalline phase's coefficient of thermal expansion is at least 10% greater than said amorphous phase's coefficient of thermal expansion.6. The sintered ceramic particle of wherein said amorphous phase abuts at least one of said predominately crystalline regions at an interface and said interface exhibits stress.7. The sintered ceramic particle of wherein said particle exhibits compressive stress at said interface.8. The sintered ceramic particle of claim I ...

LITHIUM CONTAINING GLASS WITH HIGH OXIDIZED IRON CONTENT AND METHOD OF MAKING SAME

A low infrared absorbing lithium glass includes FeO in the range of 0.0005-0.015 wt %, more preferably 0.001-0.010 wt %, and a redox ratio in the range of 0.005-0.15, more preferably in the range of 0.005-010. The glass can be chemically tempered and used to provide a ballistic viewing cover for night vision goggles or scope. A method is provided to change a glass making process from making a high infrared absorbing lithium glass having FeO in the range of 0.02 to 0.04 wt % and a redox ratio in the range of 0.2 to 0.4 to the low infrared absorbing lithium glass by adding additional oxidizers to the batch materials. A second method is provided to change a glass making process from making a low infrared absorbing lithium glass to the high infrared absorbing lithium glass by adding additional reducers to the batch material. In one embodiment of the invention the oxidizer is CeO. An embodiment of the invention covers a glass made according to the method. 2. The glass composition according to claim 1 , wherein cerium oxide is in the range of 0.01 to 0.15 wt %.3. The glass composition according to claim 1 , wherein the FeO is in the range of 0.001-0.010 wt %.4. The glass composition according to claim 1 , wherein the FeO(total iron) is in the range of 50 to 200 ppm.5. The glass composition according to claim 1 , wherein the redox ratio is in the range of 0.005 to 0.10.6. The glass composition according to claim 1 , wherein the oxidizer is selected from the group of cerium oxide in the range of 0.02 to 0.45 wt % claim 1 , manganese oxide in the range of 0.02 to 0.50 wt % and mixtures thereof.7. The glass composition according to claim 1 , wherein the FeO is in the range of 0.001-0.010 wt %; the total iron is in the range of 50 to 200 ppm; the redox ratio is in the range of 0.005 to 0.10 and the oxidizer is selected from the group of cerium oxide in the range of 0.02 to 0.45 wt % claim 1 , manganese oxide in the range of 0.02 to 0.50 wt % and mixtures thereof.9. The device ...

GLASS ARTICLES EXHIBITING HIGH COMPRESSIVE STRESS, AUTOMOTIVE INTERIOR SYSTEMS THAT INCLUDE SUCH GLASS ARTICLES AND METHODS FOR MAKING THE SAME

Embodiments of this disclosure pertain to glass articles with a glass composition including about 65 mol % or greater SiO; 8 mol % or greater AlO; from about 3.5 mol % to about 16 mol % NaO; up to about 5 mol % PO, and up to about 15 mol % ZnO. In one or more embodiments, the glass composition includes about 56% or greater SiO; about 8 mol % or greater AlO; from about 3.5 mol % to about 16 mol % NaO; up to about 1 mol % PO; and up to about 15 mol % ZnO. In some embodiments, the glass article exhibits a CS at a depth of greater than 30 micrometers of about 1 GPa or greater. Embodiments of an automotive interior system including such glass articles and methods of making glass articles are also disclosed. 1. A glass article comprising a glass composition , the glass composition comprising:{'sub': '2', 'SiOin an amount of about 65 mol % or greater;'}{'sub': 2', '3, 'AlOin an amount of about 8 mol % or greater;'}{'sub': '2', 'NaO in an amount from about 3.5 mol % to about 16 mol %;'}{'sub': 2', '5, 'PO; and'}{'sub': 2', '5, 'ZnO, wherein POis present in an amount up to about 5 mol %, and wherein ZnO is present in an amount up to about 15 mol %.'}2. The glass article of claim 1 , wherein the glass composition comprises SiOin an amount in a range from about 65 mol % to about 77 mol %; and AlOin an amount in a range from about 8 mol % to about 24 mol %.3. The glass article of claim 1 , wherein the glass composition comprises KO in an amount from about 0 mol % to about 11 mol %; MgO in an amount from about 0 mol % to about 13 mol %; and SrO in an amount from about 0 mol % to about 11.5 mol %.4. The glass article of claim 1 , wherein the glass composition comprises SnOin an amount from about 0 mol % to about 0.5 mol %.5. The glass article of claim 1 , wherein the glass composition comprises SiOin an amount from about 65 mol % to about 68 mol %; and AlOin an amount from about 10 mol % to about 15 mol %.6. The glass article of claim 1 , wherein the glass composition comprises ...

HIGH STRENGTH GLASS-CERAMICS HAVING PETALITE AND LITHIUM SILICATE STRUCTURES

Glass and glass ceramic compositions having a combination of lithium silicate and petalite crystalline phases along with methods of making the glass and glass ceramic compositions are described. The compositions include LiO, SiO, and AlO. Ion-exchanged glass-ceramic articles made from the glass and glass ceramic compositions have a surface compressive stress in a range from about 100 MPa to about 500 MPa. 1. An ion-exchanged glass-ceramic article comprising LiO , SiO , and AlO , wherein: a petalite crystalline phase; and', 'a lithium silicate crystalline phase; and, 'the ion-exchanged glass-ceramic article comprisesthe ion-exchanged glass-ceramic article has a surface compressive stress in a range from about 100 MPa to about 500 MPa.2. The ion-exchanged glass-ceramic article of claim 1 , wherein the surface compressive stress is from about 100 MPa to about 250 MPa.3. The ion-exchanged glass-ceramic article of claim 1 , wherein the ion-exchanged glass-ceramic article has a depth of layer of at least about 100 μm.4. The ion-exchanged glass-ceramic article of claim 1 , wherein the ion-exchanged glass-ceramic article has a central tension of at least 10 MPa.5. The ion-exchanged glass-ceramic article of claim 1 , wherein the petalite crystalline phase is present in the ion-exchanged glass ceramic article in an amount of from 20 to 70 wt %.6. The ion-exchanged glass ceramic article of claim 1 , wherein the lithium silicate crystalline phase is present in the ion-exchanged glass ceramic article in an amount of from 20 to 60 wt %.7. The ion-exchanged glass ceramic article of claim 1 , wherein the ion-exchanged glass-ceramic article comprises:{'sub': '2', 'from about 55 to about 80 wt % SiO;'}{'sub': '2', 'from about 5 to about 20 wt % LiO;'}{'sub': 2', '3, 'from about 2 to about 20 wt % AlO;'}{'sub': '2', 'from greater than 0 to about 10 wt % ZrO; and'}{'sub': 2', '5, 'from about 0.5 to about 15 wt % PO.'}8. The ion-exchanged glass ceramic article of claim 1 , wherein the ...

GLASSES AND GLASS CERAMICS INCLUDING A METAL OXIDE CONCENTRATION GRADIENT

A glass-based article may include from about 45 mol. % to about 80 mol. % SiO; from about 0 mol. % to about 10 mol. % NaO; less than about 5 mol. % KO; a non-zero amount of AlO; and an amorphous phase and a crystalline phase. The article may further in include a stress profile comprising a surface compressive stress (CS) and a maximum central tension (CT). A ratio of LiO (mol. %) to RO (mol. %) in the article is from about 0.5 to about 1, where RO is the sum of LiO, NaO, and KO in the article. CT may be greater than or equal to about 50 MPa and less than about 100 MPa. CS may be greater than 2.0·CT. A depth of compression (DOC) of the stress profile may be greater than or equal to 0.14·t and less than or equal to 0.25·t, where t is the thickness of the article. 1. A glass-based article comprising:{'sub': '2', 'greater than or equal to 45 mol. % and less than or equal to about 80 mol. % SiO;'}{'sub': '2', 'greater than or equal to 0 mol. % and less than or equal to 10 mol. % NaO;'}{'sub': '2', 'less than 5 mol. % KO;'}{'sub': 2', '3, 'a non-zero amount of AlO;'}a first surface and a second surface opposing the first surface thereby defining a thickness (t) of the glass-based article; and the glass-based article comprises an amorphous phase and a crystalline phase;', {'sub': 2', '2', '2', '2', '2', '2, 'a ratio of LiO (mol. %) to RO (mol. %) in the glass-based article is greater than or equal to 0.5 and less than or equal to 1, where RO is the sum of LiO, NaO, and KO in the glass-based article;'}, 'CT is greater than or equal to about 50 MPa and less than about 100 MPa;', 'CS is greater than 2.0·CT; and', 'a depth of compression (DOC) of the stress profile is greater than or equal to 0.14·t and less than or equal to 0.25·t., 'a stress profile comprising a surface compressive stress (CS) and a maximum central tension (CT), wherein2. The glass-based article of claim 1 , wherein CS is greater than or equal to 150 MPa.3. The glass-based article of claim 1 , wherein CS is ...

Wired and Detachable Charging-Unit of Electric Product

A wired and detachable, moveable, dis-assemble, re-assemble USB or Wireless charging-unit(s) which has minimum feet DC power delivery wire that is manual to coil, wrap within unit's own space for wire-arrangement, said each wired and detachable unit(s) cover broad area and people can chare external product(s) at any location within said area; wherein said unit(s) assembly with electric product which is at least one (1) desk, floor, wall-mounted item, light, (2) power strip, (3) selfie LED light has built-in or added-on image capture device(s). 1. A wired and detachable , re-assembly charging-unit , comprising;A charging-unit has at least one DC power delivery wire(1) connect with electric product built-in circuitry output-end(s),(2) storage within unit's built-in wire-arrangement,(3) assembly with electric device opening or base recessed compartment,(4) is coiled at outside said device by manual without elastic or spring piece.Said charging-unit has at least one (1) USB, (2) wireless (Qi), (3) USB and wireless; charging-system to charge external electric product(s).2. A wired detachable claim 1 , re-assembly charging-unit as claim 1 , wherein said electric device is power strip.3. A wired detachable claim 1 , re-assembly charging-unit as claim 1 , wherein said electric device is desk claim 1 , floor claim 1 , wall-mounted LED light.4. A wired detachable claim 1 , re-assembly charging-unit as claim 1 , wherein said electric device is LED light emit enough brightness to front person claim 1 , object(s) to capture at least (a) partial face or whole face image claim 1 , (b) partial body or whole body image claim 1 , and (c) object details image; by at least one mirror claim 1 , image capture device claim 1 , phone having camera or video function claim 1 , camera claim 1 , and video camera.5. A wired detachable claim 1 , re-assembly charging-unit as claim 1 , wherein said wired and detachable charging-unit has at least two unit(s) and each unit has minimum 4 feet to 30 ...

GLASSES AND GLASS CERAMICS INCLUDING A METAL OXIDE CONCENTRATION GRADIENT

Embodiments of a glass-based article including a first surface and a second surface opposing the first surface defining a thickness (t) of about 3 millimeters or less (e.g., about 1 millimeter or less), and a stress profile, wherein all points of the stress profile between a thickness range from about 0·t up to 0.3·t and from greater than 0.7·t, comprise a tangent that is less than about −0.1 MPa/micrometers or greater than about 0.1 MPa/micrometers, are disclosed. In some embodiments, the glass-based article includes a non-zero metal oxide concentration that varies along at least a portion of the thickness (e.g., 0·t to about 0.3·t). In some embodiments, the concentration of metal oxide or alkali metal oxide decreases from the first surface to a point between the first surface and the second surface and increases from the point to the second surface. The concentration of the metal oxide may be about 0.05 mol % or greater or about 0.5 mol % or greater throughout the thickness. Methods for forming such glass-based articles are also disclosed. 1. The use of a glass composition in a strengthened glass , the glass composition comprising in mol %:{'sub': '2', 'SiOin an amount from about 60 to about 72;'}{'sub': 2', '3, 'AlOin an amount from about 6 to about 10;'}a total amount of MgO+CaO+ZnO is from about 0.1 to about 8;{'sub': 2', '2', '2, 'a total amount of LiO+NaO+KO is from about 5 to about 15;'}{'sub': '2', 'LiO in an amount from about 6 to about 10;'}{'sub': '2', 'NaO in an amount from about 0 to about 10;'}{'sub': '2', 'KO in an amount of less than about 2; and'}{'sub': '2', 'claim-text': [{'sub': '2', 'the glass composition is substantially free of TiO;'}, {'sub': 2', '3, 'the glass composition is substantially free of FeO; and'}, {'sub': 2', '2', '2', '2, 'a ratio of LiO to (LiO+NaO+KO) is from about 0.5 to about 1.'}], 'ZrOin an amount of about 0.1 to about 1, wherein2. The use of the glass composition of claim 1 , wherein the glass composition is substantially ...

ENGINEERED HIGH EXPANSION GLASS-CERAMICS HAVING NEAR LINEAR THERMAL STRAIN AND METHODS THEREOF

The present invention relates to glass-ceramic compositions, as well as methods for forming such composition. In particular, the compositions include various polymorphs of silica that provide beneficial thermal expansion characteristics (e.g., a near linear thermal strain). Also described are methods of forming such compositions, as well as connectors including hermetic seals containing such compositions. 1. A method comprising:{'sub': 2', '2', '2', '3', '2', '2', '5', '2', '3, 'providing a glass-ceramic mixture configured to provide a glass-ceramic composition comprising of from about 65 wt. % to about 80 wt. % of SiO; from about 8 wt. % to about 16 wt. % of LiO; from about 2 wt. % to about 8 wt. % of AlO; from about 1 wt. % to about 8 wt. % of KO; from about 1 wt. % to about 5 wt. % of PO; from about 0.5 wt. % to about 7 wt. % of BO; and from about 0.1 wt. % to about 5 wt. % of ZnO;'}{'sub': '1', 'heating the mixture to a first temperature Tof from about 950° C. to about 1050° C.;'}{'sub': 2', '2', '2, 'rapidly cooling at a rate rgreater than about 30° C./minute to a second temperature Tof from about 400° C. to about 750° C., thereby minimizing formation of a cristobalite SiOphase within the mixture;'}{'sub': 3', '2, 'reheating the mixture to a third temperature Tof from about 750° C. to about 850° C., thereby facilitating formation of a quartz SiOphase within the mixture; and'}{'sub': '4', 'cooling the mixture to a fourth temperature Tof from about 10° C. to about 500° C., thereby forming a glass-ceramic composition.'}2. The method of claim 1 , wherein the rate ris of from about 40° C./minute to about 80° C./minute.3. The method of claim 1 , further comprising dwelling at the first temperature Tfor a first period Pconfigured to allow the mixture to flow and fill a cavity.4. The method of claim 3 , wherein the first period Pis of from about 1 minute to about 30 minutes.5. The method of claim 1 , further comprising dwelling at the second temperature Tfor a second ...

Amorphous Silica Products and Methods of Producing Amorphous Silica Products

Methods have been developed to produce amorphous silica materials including, but not limited to, glass, container glass, fiber glass, glass bead, sheet or plate glass, glass aggregate, glass sand, abrasives, proppants, foamed glass, and manufactured glass articles. The initial processing steps include preparing a melt batch comprising at least one silica containing component and other processing or product enhancing components, melting the melt batch, and cooling the melted melt batch. The batches include high concentrations of metal oxides, slags, combustible materials, limestone, other product or process enhancing compounds and combinations thereof. 1. A method of producing a manufactured glass article , comprising: glass cullet in a concentration range of 50 wt. % to 75 wt. %;', 'iron oxide in a concentration range of 20 wt. % to 40 wt. %; and', 'fluxes in a concentration range of 5 wt. % to 40 wt. %;, 'preparing a batch comprisingmelting the batch in a furnace to melt effluent; andcooling the melt effluent to form amorphous silica particles, mass or product.2. The method of claim 1 , wherein the batch comprises a combustible material.3. The method of claim 1 , wherein the batch comprises at least one of charcoal or coal in a concentration range.4. The method of claim 1 , wherein the iron oxide comprises magnetite.5. The method of claim 1 , wherein the iron oxide consists essentially of magnetite.6. The method of claim 1 , comprising crushing the amorphous silica particles claim 1 , mass or product to form glass particles.7. The method of claim 6 , wherein the magnetite is in a concentration of 20 wt. % to 35 wt. %.8. The method of claim 7 , wherein the batch comprises at least one of limestone and calcium oxide.9. The method of claim 7 , wherein the limestone in a concentration of 10 wt. % to 40 wt. %10. The method of claim 7 , wherein the limestone in a concentration of 25 wt. % to 40 wt. %11. The method of claim 1 , wherein the glass cullet is in a ...

TRANSPARENT, NEAR INFRARED-SHIELDING GLASS CERAMIC

Optically transparent glass ceramic materials comprising a glass phase containing and a crystalline tungsten bronze phase comprising nanoparticles and having the formula MWO, where M includes at least one H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Cu, Ag, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and U, and where 0 Подробнее

High strength glass-ceramics having petalite and lithium silicate structures

Glass and glass ceramic compositions having a combination of lithium silicate and petalite crystalline phases along with methods of making the glass and glass ceramic compositions are described. The compositions are compatible with conventional rolling and float processes, are transparent or translucent, and have high mechanical strength and fracture resistance. Further, the compositions are able to be chemically tempered to even higher strength glass ceramics that are useful as large substrates in multiple applications.

Methods of Fabricating Photoactive Substrates for Micro-lenses and Arrays

A method of fabrication and device made by preparing a photosensitive glass substrate comprising at least silica, lithium oxide, aluminum oxide, and cerium oxide, masking a design layout comprising form one or more micro lens on the photosensitive glass substrate, exposing at least one portion of the photosensitive glass substrate to an activating energy source, exposing the photosensitive glass substrate to a heating phase of at least ten minutes above its glass transition temperature, cooling the photo sensitive glass substrate to transform at least part of the exposed glass to a crystalline material to form a glass-crystalline substrate and etching the glass-crystalline substrate with an etchant solution to form one or more a micro lens. 1. A method to fabricate an optical comprising the steps of:a. preparing a photosensitive glass substrate comprising at least silica, lithium oxide, aluminum oxide, and cerium oxide;b. masking a halftone design with variation in optical density to delineate an optical element in the glass;c. exposing the photosensitive glass substrate to an activating energy source;d. exposing the photosensitive glass substrate to a heating phase of at least ten minutes above its glass transition temperature;e. cooling the photosensitive glass substrate to transform at least part of the exposed glass to a crystalline material to form a glass-crystalline substrate; andf. etching the glass-crystalline substrate with an etchant solution to form the one or more micro lens device.2. A method to fabricate an optical element comprising the steps of:a. preparing a photosensitive glass substrate comprising at least silica, lithium oxide, aluminum oxide, and cerium oxide;b. masking a digital mask consist transparent non transparent elements to define an diffractive optical element in the glass;c. exposing at least one portion of the photosensitive glass substrate to an activating energy source;d. exposing the photosensitive glass substrate to a heating ...

ANTIMICROBIAL PHASE-SEPARATING GLASS AND GLASS CERAMIC ARTICLES AND LAMINATES

A glass laminate for an architectural element has a glass substrate coupled to the architectural element and defines a primary surface facing away from the architectural element. A phase-separable glass cladding is coupled to the primary surface. The cladding has an interconnected matrix with a first phase composition and a second phase that has a second phase composition different than the first phase composition. The second phase is distributed throughout the interconnected matrix. A copper phase is distributed within the interconnected matrix. The glass cladding has an antimicrobial log kill rate greater than about 4 as measured by an EPA Copper Test Protocol. 1. A glass laminate for an architectural element , comprising:a glass substrate coupled to the architectural element and defining a primary surface facing away from the architectural element; and an interconnected matrix having a first phase composition;', 'a second phase having a second phase composition different than the first phase composition that is distributed throughout the interconnected matrix, and', 'a copper phase distributed within the interconnected matrix,, 'a phase-separable glass cladding coupled to the primary surface, the cladding comprisingwherein the glass cladding has an antimicrobial log kill rate greater than about 4 as measured by an EPA Copper Test Protocol.2. The glass laminate of claim 1 , wherein the copper phase comprises a plurality of copper structures in at least one of a Cuand a Cuoxidation state.3. The glass laminate of claim 2 , wherein the copper structures have a largest cross-sectional dimension between about 0.1 microns and about 10 microns.4. The glass laminate of claim 1 , wherein the interconnected matrix is less corrosion resistant to at least one of water and an acid than the second phase claim 1 , and further wherein the first phase composition has a greater concentration of BOthan the second phase composition.5. The glass laminate of claim 1 , wherein the ...

GLASS-CERAMIC OF LITHIUM ALUMINOSILICATE TYPE CONTAINING A SOLID SOLUTION OF B-SPODUMENE

A glass-ceramic of the lithium aluminosilicate type includes a solid solution of β-spodumene and exhibits, for a thickness of 4 mm; a light transmittance within a range extending from 0.3 to 2%, an optical transmittance for a wavelength of 625 nm of greater than 3.0%, an optical transmittance for a wavelength of 950 nm within a range extending from 50 to 75%, an optical transmittance for a wavelength of 1600 nm of at least 50%, and L*, a*, b* colorimetric coordinates in diffuse reflection for an illuminant D65 and a reference observer at 2° such that 15.0≦L*≦40.0, −3.0≦a*≦3.0 and −10.0≦b*≦3.0. The chemical composition of the glass-ceramic includes the following constituents, varying within the limits by weight defined: SnO0.2-0.6%, VO0.015-0.070%, CrO0.01-0.04% or BiO0.05-3.0%, FeO0.05-<0.15%, ASO+SbO%. 1. A glass-ceramic of the lithium aluminosilicate type comprising a solid solution of β-spodumene and exhibiting , for a thickness of 4 mm;a light transmittance within a range extending from 0.3 to 2%,an optical transmittance for a wavelength of 625 nm of greater than 2.0%,an optical transmittance for a wavelength of 950 nm within a range extending from 50 to 75%,an optical transmittance for a wavelength of 1600 nm of at least 50%, andL*, a*, b* colorimetric coordinates in diffuse reflection for an illuminant D65 and a reference observer at 2° such that 15.0≦L*≦40.0, −3.0≦a*≦3.0 and −10.0≦b*≦3.0, [{'sub': '2', 'SnO0.2-0.6%,'}, {'sub': 2', '5, 'VO0.015-0.070%,'}, {'sub': 2', '3', '2', '3, 'CrO0.01-0.04% or BiO0.05-3.0%'}, {'sub': 2', '3, 'FeO0.05-<0.15%'}, {'sub': 2', '3', '2', '3, 'AsO+SbO<0.1%.'}], 'said glass-ceramic being such that its chemical composition comprises the following constituents, varying within the limits by weight defined below2. The glass-ceramic according to claim 1 , wherein the content of VOis at most 0.060%.3. The glass-ceramic according to claim 1 , comprising a solid solution of β-spodumene as main crystal phase.4. The glass-ceramic according ...

Lithium Silicate Diopside Glass Ceramics

Lithium silicate-diopside glass ceramics are described which are characterized by a controllable translucence and can be satisfactorily processed mechanically and therefore can be used in particular as restoration material in dentistry. 1. Lithium silicate-diopside glass ceramic which comprises lithium silicate as main crystal phase and diopside as further crystal phase.2. Glass ceramic according to claim 1 , which comprises 53.0 to 75.0 wt.-% SiO.3. Glass ceramic according to claim 1 , which comprises 10.0 to 23.0 wt.-% LiO.4. Glass ceramic according to claim 1 , which comprises 1.0 to 13.0 wt.-% CaO and/or 1.0 to 12.0 wt.-% MgO.5. Glass ceramic according to claim 4 , wherein the molar ratio of CaO to MgO is 0.5 to 2.0.6. Glass ceramic according to claim 1 , which comprises 0 to 8.0 O.7. Glass ceramic according to claim 1 , which comprises 0 to 10.0 wt.-% further alkali metal oxide MeO claim 1 , wherein MeO is selected from NaO claim 1 , KO claim 1 , RbO and/or CsO.8. (canceled)9. Glass ceramic according to claim 1 , which comprises 0 to 10.0 wt.-% oxide of trivalent elements MeO claim 1 , wherein MeOis selected from AlO claim 1 , BO claim 1 , YO claim 1 , LaO claim 1 , GaOand/or InO.10. (canceled)11. (canceled)12. (canceled)14. (canceled)15. Glass ceramic according to claim 1 , which comprises lithium silicate in the form of lithium disilicate and/or lithium metasilicate.16. (canceled)17. (canceled)18. (canceled)19. Glass ceramic according to claim 1 , which is present in the form of a blank or a dental restoration.20. Starting glass which comprises the components of the glass ceramic according to .21. Starting glass according to claim 20 , which is present in the form of a ground powder or a compact made of ground powder.22. Process for the preparation of the glass ceramic according to claim 1 , wherein{'claim-ref': {'@idref': 'CLM-00020', 'claim 20'}, '(a) the starting glass according to is ground,'}(b) the ground starting glass is optionally pressed to form a ...

METHODS FOR FORMING GLASS CERAMIC ARTICLES

A method for forming glass ceramic articles includes heating a stack of glass sheets to a nucleation temperature to create a nucleated crystallizable stack of sheets; heating the nucleated crystallizable stack of glass sheets to a crystallization temperature; and maintaining the crystallization temperature for a predetermined period of time to produce the glass-ceramic articles. The stack of glass sheets has a mass index of less than or equal to 35. 1. A method for forming glass ceramic articles comprising:heating a stack of glass sheets to a nucleation temperature to create a nucleated crystallizable stack of sheets;heating the nucleated crystallizable stack of glass sheets to a crystallization temperature; andmaintaining the crystallization temperature for a predetermined period of time to produce the glass-ceramic articles,wherein the stack of glass sheets has a mass index of less than or equal to 35.2. The method for forming glass ceramic articles of claim 1 , wherein the stack of glass sheets has a mass index of less than or equal to 25.3. The method for forming glass ceramic articles of claim 1 , wherein the stack of glass sheets has a mass index of less than or equal to 15.4. The method for forming glass ceramic articles of claim 1 , wherein the stack of glass sheets has a mass index of less than or equal to 10.5. The method for forming glass ceramic articles of claim 1 , wherein the glass sheets have a thickness less than or equal to 1.11 mm and the number of glass sheets in the stack of glass sheets is less than 31.6. The method for forming glass ceramic articles of claim 1 , wherein the glass sheets have a thickness less than or equal to 1.11 mm and the number of glass sheets in the stack of glass sheets is less than 22.7. The method for forming glass ceramic articles of claim 1 , wherein the glass sheets have a thickness less than or equal to 1.11 mm and the number of glass sheets in the stack of glass sheets is less than 9.8. The method for forming glass ...

Glass ceramic sintered body and wiring substrate

A glass ceramic sintered body having a small dielectric loss in a high frequency band of 10 GHz or higher and stable characteristics against temperature variation and a wiring substrate using the same are provided. The glass ceramic sintered body contains crystallized glass, an alumina filler, silica, and strontium titanate. The content of the crystallized glass is 50 mass % to 80 mass %, the content of the alumina filler is 15.6 mass % to 31.2 mass % in terms of Al2O3, the content of silica is 0.4 mass % to 4.8 mass % in terms of SiO2, and the content of the strontium titanate is 4 mass % to 14 mass % in terms of SrTiO3.

QUARTZ GLASS COMPONENT OF HIGH THERMAL STABILITY, SEMIFINISHED PRODUCT THEREFOR, AND METHOD FOR PRODUCING THE SAME

In a known method for producing a quartz glass component, a crystal formation layer containing a crystallization promoter is produced on a coating surface of a base body of quartz glass. Starting therefrom, to provide a method for producing a quartz glass component of improved thermal strength and long-term stability which displays a comparatively small deformation particularly also in the case of rapid heating-up processes, it is suggested according to one aspect that a porous crystal formation layer containing amorphous SiOparticles is produced with a mean thickness in the range of 0.1 to 5 mm, and that a substance which contains cesium and/or rubidium is used as the crystallization promoter. 1. A method for producing a quartz glass component , with a crystal formation layer containing a crystallization promoter being produced on a coating surface of a base body of quartz glass , comprising:{'sub': '2', 'producing a porous crystal formation layer containing amorphous SiOparticles with a mean thickness in the range of 0.1 to 5 mm; and'}using a substance that contains cesium and/or rubidium as the crystallization promoter.2. The method of claim 1 , wherein the crystallization promoter substance has a melting temperature below 1150° C.3. The method of claim 1 , wherein the crystallization promoter substance has a melting temperature below 1100° C.4. The method of claim 1 , wherein the amount of the crystallization promoter substance in the porous crystal formation layer is at least 0.025 mole % and not more than 0.5 mole %.5. The method of claim 4 , wherein the porous crystal formation layer is produced with a mean thickness in the range of 0.5 to 3 mm.6. The method of claim 1 , wherein amorphous SiOparticles produced by comminuting quartz glass make up the greatest volume proportion of the crystal formation layer.7. The method of claim 1 , wherein the production of the crystal formation layer comprises:{'sub': '2', 'applying a dispersion which contains the amorphous ...

LI2O-AL2O3-SIO2-BASED CRYSTALLIZED GLASS

Provided is a LiO—AlO—SiO-based crystallized glass in which a yellowish tint due to TiO, FeOor so on is reduced. The LiO—AlO—SiO-based crystallized glass contains, in terms of % by mass, 40 to 90% SiO, 5 to 30% AlO, 1 to 10% LiO, 0 to 20% SnO, 1 to 20% ZrO, 0 to 10% MgO, 0 to 10% PO, and 0 to below 2% TiO. 1. A LiO—AlO—SiO-based crystallized glass containing , in terms of % by mass , 40 to 90% SiO , 5 to 30% AlO , 1 to 10% LiO , 0 to 20% SnO , 1 to 20% ZrO , 0 to 10% MgO , 0 to 10% PO , and 0 to below 2% TiO.2. The LiO—AlO—SiO-based crystallized glass according to claim 1 , further containing claim 1 , in terms of % by mass claim 1 , 0 to 10% NaO claim 1 , 0 to 10% KO claim 1 , 0 to 10% CaO claim 1 , 0 to 10% SrO claim 1 , 0 to 10% BaO claim 1 , 0 to 10% ZnO claim 1 , and 0 to 10% BO.3. The LiO—AlO—SiO-based crystallized glass according to claim 1 , further containing claim 1 , in terms of % by mass claim 1 , 0.1% or less FeO.4. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of SnO/(SnO+ZrO+PO+TiO+13203) is 0.06 or more.5. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of AlO/(SnO+ZrO) is 7.1 or less.6. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of SnO/(SnO+ZrO) is 0.01 to 0.99.7. The LiO—AlO—SiO-based crystallized glass according to claim 1 , containing claim 1 , in terms of % by mass claim 1 , 8% or less NaO+KO+CaO+SrO+BaO.8. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of (SiO+AlO)/LiO is 20 or more.9. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of (SiO+AlO)/SnOis 44 or more.10. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of (MgO+ZnO)/LiO is less than 0.395 or more than 0.754.11. The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of (LiO+NaO+KO)/ZrOis 2.0 or less.12. The LiO—AlO—SiO-based ...

Feedstock Gel and Method of Making Glass-Ceramic Articles from the Feedstock Gel

A method of making a glass-ceramic article includes synthesizing a feedstock gel that includes a base oxide network comprising NaO, CaO, and SiO, in which a molar ratio of NaO:CaO:SiOin the gel is 1:2:3, and then converting the feedstock gel into a glass-ceramic article such as a container or a partially-formed container. The conversion of the feedstock gel into a glass-ceramic container may be performed at a temperature that does not exceed 900° C. and may include the steps of pressing the feedstock gel into a compressed solid green-body, sintering the green-body into a solid monolithic body of a glass-ceramic material, deforming the solid monolithic glass-ceramic body into a glass-ceramic preform, and cooling the preform. A glass-ceramic article having a glass-ceramic material that has a molar ratio of NaO:CaO:SiOthat is 1:2:3 is also disclosed. 1. A method of making a glass-ceramic article , the method comprising:{'sub': 2', '2', '2', '2, 'synthesizing a feedstock gel that includes a base oxide network comprising NaO, CaO, and SiOin which a molar ratio of NaO:CaO:SiOis 1:2:3;'}pressing the feedstock gel into a compressed solid green-body;sintering the compressed solid green-body of the feedstock gel at a temperature below 900° C. to produce a solid monolithic body of a glass-ceramic material having an amorphous residual glass phase and a crystalline phase distributed within the amorphous residual glass phase, the solid monolithic body of a glass-ceramic material having a density that is greater than a density of the feedstock gel;deforming the solid monolithic body of a glass-ceramic material into a glass-ceramic preform having a container shape at a temperature of 600° C. or above; andcooling the glass-ceramic preform into a glass-ceramic article in the form of a container or a partially-formed container.2. The method set forth in claim 1 , wherein the step of synthesizing the feedstock gel comprises:{'sub': 2', '2, 'providing an aqueous solution that includes ...

GLASS

A glass of the present invention includes as a glass composition, in terms of mol %, 60% to 80% of SiO, 12% to 25% of AlO, 0% to 3% of BO, 0% to 3% of LiO+NaO+KO, 5% to 25% of MgO+CaO+SrO+BaO, and 0.1% to 10% of PO, and has a strain point of more than 730° C. 1. A glass , comprising as a glass composition , in terms of mol % , 60% to 80% of SiO , 12% to 25% of AlO , 0% to 3% of BO , 0% to 3% of LiO+NaO+KO , 5% to 25% of MgO+CaO+SrO+BaO , and 0.1% to 10% of PO , and having a strain point of more than 730° C.2. The glass according to claim 1 , wherein the glass has a content of BOof less than 1 mol %.3. The glass according to claim 1 , wherein the glass has a content of LiO+NaO+KO of 0.2 mol % or less.4. The glass according to claim 1 , wherein the glass has a molar ratio (MgO+CaO+SrO+BaO)/AlOof from 0.5 to 3.5. The glass according to claim 1 , wherein the glass has a strain point of 760° C. or more.6. The glass according to claim 1 , wherein the glass has a difference of (a temperature at a viscosity at high temperature of 10dPa·s-strain point) of 980° C. or less.7. The glass according to claim 1 , wherein the glass has a temperature at a viscosity at high temperature of 10dPa·s of 1 claim 1 ,750° C. or less.8. The glass according to claim 1 , wherein the glass has a flat sheet shape.9. The glass according to claim 1 , wherein the glass is used for a substrate for forming a semiconductor crystal. The present invention relates to a glass having high heat resistance, and for example, to a glass substrate for forming a semiconductor crystal for an LED at high temperature.It has been known that a semiconductor crystal to be used in an LED or the like is improved in semiconductor characteristics through its forming into a film at higher temperature.In such application, a sapphire substrate having high heat resistance is generally used. Also in other applications, the sapphire substrate is used when the semiconductor crystal is formed into a film at high temperature (e.g., ...

SODA-LIME-SILICA GLASS-CERAMIC

A soda-lime-silica glass-ceramic article having an amorphous matrix phase and a crystalline phase is disclosed along with a method of manufacturing a soda-lime-silica glass-ceramic article from a parent glass composition comprising 47-63 mol % SiO, 15-22 mol % NaO, and 18-36 mol % CaO. The crystalline phase of the glass-ceramic article has a higher concentration of sodium (Na) than that of the amorphous matrix phase. 1. A soda-lime-silica glass-ceramic container comprising:{'sub': 2', '2, 'a body defining the shape of a hollow container and comprising a soda-lime-silica glass-ceramic having an amorphous matrix phase and a crystalline phase, with the amorphous matrix phase and the crystalline phase each having a concentration of sodium, wherein the soda-lime-silica glass-ceramic has an overall chemical composition comprising 47-63 mol % SiO, 15-22 mol % NaO, and 18-36 mol % CaO, wherein the crystalline phase comprises combeite crystalline particles homogeneously dispersed throughout the amorphous matrix phase, and wherein the concentration of sodium in the crystalline phase is greater than the concentration of sodium in the amorphous matrix phase.'}2. The soda-lime-silica glass-ceramic container set forth in claim 1 , wherein the crystalline phase constitutes 10 vol % to 70 vol % of the soda-lime-silica glass-ceramic.3. The soda-lime-silica glass-ceramic container set forth in claim 1 , wherein the amorphous matrix phase comprises 9-13 at % sodium (Na) and the crystalline phase comprises 12-17 at % sodium (Na).4. (canceled)5. (canceled)6. The soda-lime-silica glass-ceramic container set forth in claim 4 , wherein the combeite crystalline particles have a mean particle size in the range of 0.1 μm to 50 μm.7. The soda-lime-silica glass-ceramic container set forth in claim 1 , wherein the crystalline phase does not include particles of devitrite (NaO.3CaO.6SiO) claim 1 , wollastonite (CaO.SiO) claim 1 , or a SiOpolymorph.8. The soda-lime-silica glass-ceramic container ...

METHODS FOR CERAMMING GLASS WITH NUCLEATION AND GROWTH DENSITY AND VISCOSITY CHANGES

A method for ceramming a glass article to a glass-ceramic includes placing a glass article into a heating apparatus, and heating the glass article to a first hold temperature at a first predetermined heating rate. The glass article is held at the first hold temperature for a first predetermined duration. The viscosity of the glass article is maintained within log viscosity ±1.0 poise during the first predetermined duration. The glass article is then heated from the first hold temperature to a second hold temperature at a second predetermined heating rate. The glass article is held at the second hold temperature for a second duration. A density of the glass article is monitored from the heating of the glass article from the first hold temperature through the second duration, and the second duration is ended when an absolute value of a density rate of change of the glass article is less than or equal to 0.10 (g/cm)/min. 1. A method for ceramming a glass article to a glass-ceramic comprising:placing a glass article into a heating apparatus;heating the glass article to a first hold temperature at a first predetermined heating rate;holding the glass article at the first hold temperature for a first predetermined duration, wherein viscosity of the glass article is maintained within log of viscosity ±1.0 poise of a target viscosity during the first predetermined duration;heating the glass article from the first hold temperature to a second hold temperature at a second predetermined heating rate;holding the glass article at the second hold temperature for a second duration, wherein density of the glass article is monitored from the heating of the glass article from the first hold temperature through the second duration; and{'sup': '3', 'ending the second duration when an absolute value of a density rate of change of the glass article is less than or equal to 0.10 (g/cm)/min.'}2. The method of claim 1 , wherein ending the second duration occurs when the absolute value of the ...

GLASS CERAMIC ARTICLES HAVING IMPROVED PROPERTIES AND METHODS FOR MAKING THE SAME

A glass ceramic article including a lithium disilicate crystalline phase, a petalite crystalline phased, and a residual glass phase. The glass ceramic article has a warp (μm)<(3.65×10/μm×diagonal) where diagonal is a diagonal measurement of the glass ceramic article in μm, a stress of less than 30 nm of retardation per mm of glass ceramic article thickness, a haze (%)<0.0994t+0.12 where t is the thickness of the glass ceramic article in mm, and an optical transmission (%)>0.91×10of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm. 1. A glass ceramic article comprising:a lithium disilicate crystalline phase;a petalite crystalline phased; anda residual glass phase, whereinthe glass ceramic article comprises:{'sup': '−6', 'a warp (μm)<(3.65×10μm×diagonal) where diagonal is a diagonal measurement of the glass ceramic article in μm;'}a stress of less than 30 nm of retardation per mm of glass ceramic article thickness;a haze (%)<0.0994t+0.12 where t is the thickness of the glass ceramic article in mm; and{'sup': '(2-0.03t)', 'an optical transmission (%)>0.91×10of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm.'}2. The glass ceramic article of claim 1 , wherein the glass ceramic article has a fracture toughness in a range from 1.0 MPa√m to 2.0 MPa√m.3. The glass ceramic article of claim 1 , wherein the glass ceramic article has a hardness measured by a Vickers indenter at a 200 gram load of greater than 680 kgf.4. The glass ceramic article of claim 1 , wherein the glass ceramic article is strengthened and has compressive stress greater than 175 MPa.5. The glass ceramic article of claim 4 , wherein the glass ceramic article has a central tension greater than or equal to 80 MPa.6. The glass ceramic article of claim 4 , wherein the glass ceramic article has a depth of compression of 0*t to 0.3*t claim 4 , where t is thickness of the ...

Glass-ceramic articles with increased resistance to fracture and methods for making the same

A glass-ceramic article having one or more crystalline phases; a residual glass phase; a compressive stress layer extending from a first surface to a depth of compression (DOC); a maximum central tension greater than 70 MPa; a stored tensile energy greater than 22 J/m2; a fracture toughness greater than 1.0 MPa√m; and a haze less than 0.2.

GLASS CERAMIC WORKTOP

An item of equipment includes at least one worktop formed of at least one substrate made of transparent monolithic glass material with a surface area of greater than 0.7 m. The substrate exhibits a light transmission Tof greater than 10% and an opacity indicator of between 5 and 90. The substrate is predominantly or completely bare or provided with coating(s) such that the substrate, thus coated, exhibits a haze of less than 15% and/or a light transmission Tof greater than 60% and/or an opacity indicator of less than 85. The item of equipment also includes at least one heating element and at least one interface for communication with at least one element of the worktop and/or with at least one external element for wireless communication. The item of equipment is devoid of light source(s). 1. An item of equipment , comprising:{'sup': '2', 'sub': L', 'L, 'at least one worktop formed of at least one substrate made of transparent monolithic glass material with a surface area of greater than 0.7 m, said substrate exhibiting a light transmission Tof greater than 10% and an opacity indicator of between 5 and 90, said substrate being predominantly or completely bare or provided with coating(s) such that the substrate, thus coated, exhibits a haze of less than 15% and/or a light transmission Tof greater than 60% and/or an opacity indicator of less than 85,'}at least one heating element,at least one interface for communication with at least one element of the worktop and/or with at least one external element for wireless communication,said item of equipment additionally being devoid of light source(s).2. The item of equipment as claimed in claim 1 , wherein the surface area of the substrate made of glass material is greater than 0.9 m claim 1 , the thickness of said substrate is at least 2 mm claim 1 , and the thickness of the substrate is less than 15 mm.3. The item of equipment as claimed in claim 1 , wherein the substrate made of glass material occupies at least 50% of the ...

ION EXCHANGEABLE GLASS, GLASS CERAMICS AND METHODS FOR MAKING THE SAME

Glass-ceramics and precursor glasses that are crystallizable to glass-ceramics are disclosed. The glass-ceramics of one or more embodiments include rutile, anatase, armalcolite or a combination thereof as the predominant crystalline phase. Such glasses and glass-ceramicsmay include compositions of, in mole %: SiOin the range from about 45 to about 75; AlOin the range from about 4 to about 25; POin the range from about 0 to about 10; MgO in the range from about 0 to about 8; RO in the range from about 0 to about 33; ZnO in the range from about 0 to about 8; ZrOin the range from about 0 to about 4; BOin the range from about 0 to about 12, and one or more nucleating agents in the range from about 0.5 to about 12. In some glass-ceramic articles, the total crystalline phase includes up to 20% by weight of the glass-ceramic article. 1. A glass-ceramic article comprising: [{'sub': '2', 'SiOin the range from about 45 to about 75;'}, {'sub': 2', '3, 'AlOin the range from about 4 to about 25;'}, {'sub': 2', '5, 'POin the range from about 0 to about 10;'}, 'MgO in the range from about 0 to about 8;', {'sub': '2', 'RO in the range from about 0 to about 33;'}, 'ZnO in the range from about 0 to about 8;', {'sub': '2', 'ZrOin the range from about 0 to about 4;'}, {'sub': '2', 'TiOin the range from about 0.5 to about 12; and'}, {'sub': 2', '3, 'BOin the range from about 0 to about 12,'}, {'sub': 2', '2', '2', '2, 'wherein RO comprises one or more of NaO, LiO and KO.'}], 'a predominant crystalline phase comprising anatase, rutile, or a combination thereof; and a composition, in mol %, comprising2. The glass-ceramic article of claim 1 , wherein (RO—AlO) is in the range from about −4 to about 4.3. The glass-ceramic article of claim 1 , wherein the composition comprises claim 1 , in mol % claim 1 , LiO in the range from about 0 to about 12;{'sub': '2', 'NaO in the range from about 4 to about 20; and'}{'sub': '2', 'KO in the range from about 0 to about 2.'}4. The glass-ceramic article ...

COPPER ALUMINOBOROSILICATE GLASS AND USES THEREOF

The present invention provides an aluminoborosilicate glass of composition, expressed as percentages by weight of oxides, containing: 60% to 70% of SiO, 13% to 20% of AlO, 1% to 9% of BO, 0 to 3% of PO, 0.5% to 4% of MgO, 1% to 4% of BaO, 0 to 3% of CaO, 0 to 3% of SrO, 2% to 10% of ZnO, 0 to 2% of LiO, 0 to 2% of NaO, 0 to 2% of KO, 0.1% to 3% of CuO, optionally up to 1% of at least one fining agent; and optionally up to 2% of at least one coloring agent other than CuO, with MgO+BaO+CaO+SrO<6%, 0.2% Подробнее

METHOD FOR PREPARING GLASS-CERAMICS, CAPABLE OF ADJUSTING MACHINABILITY OR TRANSLUCENCY THROUGH CHANGE IN TEMPERATURE OF HEAT TREATMENT

Provided is a method for preparing a lithium disilicate glass-ceramics containing silicate as a main component, and more particularly, to a method for preparing a glass-ceramics, which is capable of adjusting machinability or translucency according to a crystalline size by using a first heat treatment or a second heat treatment. To this end, a method for preparing a glass-ceramics containing a silica crystalline phase includes: performing a first heat treatment on a glass composition at a temperature of 400 to 850° C., so that a lithium disilicate crystalline phase and a silica crystalline phase each having a size of 5 to 2,000 nm are formed through the first heat treatment. After the first heat treatment, the method further includes performing a second heat treatment at a temperature of 780 to 880° C., so that translucency is adjusted by a temperature of the second heat treatment. 1. A glass composition for dental materials comprising:{'sub': '2', '60 to 83 wt % SiO;'}{'sub': '2', '10 to 15 wt % LiO;'}{'sub': 2', '5, '2 to 6 wt % POworking as a nuclei formation agent;'}{'sub': 2', '3, '1 to 5 wt % AlOfor increasing a glass transition temperature and a softening point and enhancing chemical durability of glass;'}0.1 to 3 wt % SrO for increasing the softening point of the glass;0.1 to 2 wt % ZnO;1 to 5 wt % colorants; and{'sub': 2', '2, '2.5 to 6 wt % mixture of NaO and KO for increasing a thermal expansion coefficient of the glass,'}wherein the glass composition is subjected to a first heat treatment at a temperature of 480 to 800° C. to form a lithium disilicate crystalline phase and a silica crystalline phase each having a size of 30 to 500 nm.2. A method for preparing a glass-ceramics containing a silica crystalline phase , the method comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'performing a first heat treatment on the glass composition of at a temperature of 480 to 800° C., so that a lithium disilicate crystalline phase and a silica crystalline ...

LITHIUM SILICATE MATERIALS

Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength. 1. A lithium silicate glass ceramic for dental restorations which comprises a main crystalline phase comprising lithium metasilicate , wherein the lithium metasilicate crystals comprise lamellar or platelet crystals.2. The lithium silicate glass ceramic of claim 1 , wherein the lithium metasilicate forms more than 50 and up to 80 vol. % of the lithium silicate glass ceramic.3. The lithium silicate glass ceramic of claim 1 , wherein the glass ceramic is in form of a blank or a dental restoration.4. The lithium silicate glass ceramic of claim 3 , wherein the blank is shaped into a dental restoration by machining or pressing.5. The lithium silicate glass ceramic of claim 4 , wherein machining comprises grinding claim 4 , trimming or milling.6. The lithium silicate glass ceramic of claim 4 , wherein the dental restoration is an inlay claim 4 , an onlay claim 4 , a bridge claim 4 , an abutment claim 4 , a facing claim 4 , a veneer claim 4 , a facet claim 4 , a crown claim 4 , a partial crown claim 4 , a framework or a coping.7. The lithium silicate glass ceramic of claim 1 , comprising SiO claim 1 , LiO and a nucleating agent.8. A lithium silicate glass ceramic material formed by:{'sub': 2', '2', '2', '2', '3, 'a) heating a starting glass material which is essentially free of ZnO and comprises SiO, LiO, KO, AlO, nucleating agent, and optionally Me(II)O, wherein Me is CaO, BaO, MgO, SrO or combinations thereon, at a first temperature such that nuclei suitable to form lithium metasilicate crystals are formed; and'}b) heating the material from a) at a second temperature which is higher than the first temperature to produce lithium silicate glass ceramic which has lithium metasilicate as the main crystalline phase, and wherein the crystals are of ...

ION EXCHANGED GLASS WITH HIGH RESISTANCE TO SHARP CONTACT FAILURE AND ARTICLES MADE THEREFROM

An article comprising an ion-exchanged glass material that prevents sharp contact flaws from entering a central region of the material that is under central tension and thus causing failure of the material. The glass material may be a glass or glass ceramic having a surface layer under compression. In some embodiments, the depth of the compressive layer is greater than about 75 um. The greater depth of layer prevents flaws from penetrating the compressive layer to the region under tension. 131.-. (canceled)32. An article comprising a glass material , the glass material having a thickness of less than 1.5 mm , a compressive layer extending from a surface of the glass material to a depth of layer of at least 75 microns , wherein the compressive layer is under a compressive stress of at least 250 MPa , and wherein the glass material is a glass ceramic comprising a silicate glassy phase and a ceramic phase.33. The article of claim 32 , wherein the glass material comprises an inner central region under a tension of up to 75 MPa.34. The article of claim 33 , wherein the glass material has a Vickers crack initiation threshold of at least 5 kgf.35. The article of claim 34 , wherein the glass material has a Vickers crack initiation threshold of at least 10 kgf.36. The article of claim 35 , wherein the Vickers crack initiation threshold is at least 20 kgf.37. The article of claim 33 , wherein the compressive stress is at least 900 MPa.38. The article of claim 33 , wherein [(Al(mol %)+BO(mol %))/(Σ alkali metal modifiers (mol %))]>1.39. The article of claim 32 , wherein the glass material has a Vickers crack initiation threshold of at least 5 kgf.40. The article of claim 39 , wherein the glass material has a Vickers crack initiation threshold of at least 10 kgf.41. The article of claim 40 , wherein the Vickers crack initiation threshold is at least 20 kgf.42. The article of claim 41 , wherein the compressive stress is at least 900 MPa.43. The article of claim 39 , wherein [( ...

Microcrystalline Glass, Microcrystalline Glass Product, and Manufacturing Method Therefor

The present invention discloses a microcrystalline glass, a microcrystalline glass product, and a manufacturing method therefor. The main crystal phase of the microcrystalline glass comprises lithium silicate and a quartz crystal phase. The haze of the microcrystalline glass of the thickness of 0.55 mm is below 0.6%. The microcrystalline glass comprises the following components in percentage by weight: SiO: 65-85%; AlO: 1-15%; LiO: 5-15%; ZrO: 0.1-10%; PO: 0.1-10%; KO: 0-10%; MgO: 0-10%; ZnO: 0-10%. A four-point bending strength of the microcrystalline glass product is more than 600 Mpa. 1. A microcrystalline glass product , wherein the main crystal phase thereof comprises lithium silicate and a quartz crystal phase , a four-point bending strength of the microcrystalline glass product is above 600 MPa , and the microcrystalline glass product comprises the following components in percentage by weight: SiO: 65-85%; AlO: 1-15%; LiO: 5-15%; ZrO: 0.1-10%; PO: 0.1-10%; KO: 0-10%; MgO: 0-10%; ZnO: 0-10%; NaO: 0-5%.2. The microcrystalline glass product according to claim 1 , further comprising the following components in percentage by weight: SrO: 0-5%; and/or BaO: 0-5%; and/or TiO: 0-5%; and/or YO: 0-5%; and/or BO: 0-3%; and/or clarifiant: 0-2%.3. The microcrystalline glass product according to claim 1 , wherein the content of each component satisfies one or more of the following 6 conditions: 1) (SiO+LiO)/AlOis 6-15; 2) (AlO+LiO)/POis 5-20; 3) (SiO+LiO)/POis 40-80; 4) (Si+AlO+LiO+ZrO)/POis 40-90; 5) (KO+MgO)/ZrOis 0.6-1.2; 6) LiO/(KO+ZrO) is 2.3-4.0.4. The microcrystalline glass product according to claim 1 , comprising the following components in percentage by weight: SiO: 70-80%; and/or AlO: 4-12%; and/or LiO: 7-15%; and/or ZrO: 0.5-6%; and/or PO: 0.5-5%; and/or KO: 0-5% claim 1 , and/or MgO: 0-5%; and/or ZnO: 0-5%; and/or SrO: 0-1%; and/or BaO: 0-1%; and/or TiO: 0-1%; and/or YO: 0-1%; and/or NaO: 0-3%; and/or BO: 0.1-2%; and/or clarifiant: 0-1%.5. The microcrystalline ...

LOCALLY STRENGTHENED GLASS-CERAMICS AND METHODS OF MAKING THE SAME

Locally cerammed optically transparent glass-ceramic articles for consumer products. The locally cerammed glass-ceramic articles may have one or more primary glass-ceramic regions including primary crystal phases of a glass-ceramic material and one or more secondary glass-ceramic regions including secondary crystal phases of the glass-ceramic material. The primary glass-ceramic region(s) may be optically transparent and the secondary glass-ceramic region(s) may be non-optically transparent. The primary glass-ceramic region(s) may have a fracture toughness less than the fracture toughness of the secondary glass-ceramic region(s). 1. A glass-ceramic article comprising: a primary glass-ceramic region comprising primary crystal phases of the glass-ceramic material and a fracture toughness of X MPa*m{circumflex over (\u2003)}½, wherein the primary crystal phases of the glass-ceramic material are optically transparent, and', 'a secondary glass-ceramic region comprising secondary crystal phases of the glass-ceramic material and a fracture toughness of Y MPa*m{circumflex over (\u2003)}½, wherein the secondary crystal phases of the glass-ceramic material are not optically transparent, and wherein Y is greater than X., 'a body formed of a glass-ceramic material, the body comprising2. The glass-ceramic article of claim 1 , wherein the primary crystal phases comprise petalite and lithium disilicate.3. The glass-ceramic article of claim 1 , wherein the secondary crystal phases comprise beta-spodumene claim 1 , lithium disilicate claim 1 , and zirconia.4. The glass-ceramic article of claim 1 , wherein X is 0.9 MPa*m{circumflex over ( )}½ or more.5. The glass-ceramic article of claim 1 , wherein Y is 2 MPa*m{circumflex over ( )}½ or more.6. The glass-ceramic article of claim 1 , wherein Y is at least two times more than X.7. The glass-ceramic article of claim 1 , wherein the primary crystal phases of the glass-ceramic material comprise a first average grain size and wherein the ...

BORON PHOSPHATE GLASS-CERAMICS WITH LOW DIELECTRIC LOSS

A glass-ceramic that includes: SiOfrom about 35 mol % to about 80 mol %; BOfrom about 10 mol % to about 50 mol %; POfrom about 10 mol % to about 50 mol %; and an optional addition of one or more of CaO, MgO and BiOfrom 0 mol % to about 5 mol %, wherein the glass-ceramic further comprises a boron-phosphate crystalline phase. 1. A glass-ceramic , comprising:{'sub': '2', 'SiOfrom about 35 mol % to about 80 mol %;'}{'sub': 2', '3, 'BOfrom about 10 mol % to about 50 mol %;'}{'sub': 2', '5, 'POfrom about 10 mol % to about 50 mol %; and'}{'sub': 2', '3, 'an optional addition of one or more of CaO, MgO and BiOfrom 0 mol % to about 5 mol %,'}wherein the glass-ceramic further comprises a boron-phosphate crystalline phase.2. The glass-ceramic according to claim 1 , wherein the glass-ceramic comprises an average coefficient of thermal expansion (CTE) of about 40×10/° C. to about 65×10/° C. claim 1 , as measured from 25° C. to 300° C.3. The glass-ceramic according to claim 1 , further comprising:{'sub': 2', '3, 'AlOfrom about 0.005 mol % to about 1 mol %.'}4. The glass-ceramic according to claim 1 , further comprising:{'sub': '2', 'SnOfrom about 0.005 mol % to about 0.5 mol %.'}5. The glass-ceramic according to claim 1 , further comprising:{'sub': '2', 'SiOfrom about 55 mol % to about 75 mol %;'}{'sub': 2', '3, 'BOfrom about 10 mol % to about 30 mol %; and'}{'sub': 2', '5, 'POfrom about 10 mol % to about 35 mol %.'}6. The glass-ceramic according to claim 1 , the boron-phosphate crystalline phase being derived from ceramming of the glass-ceramic between about 750° C. and about 1150° C. for about 1 to about 10 hours.7. The glass-ceramic according to claim 1 , wherein the ratio of BOto POranges from 1:2 to 2:1.8. A glass-ceramic claim 1 , comprising:{'sub': '2', 'SiOfrom about 35 mol % to about 80 mol %;'}{'sub': 2', '3, 'BOfrom about 10 mol % to about 50 mol %;'}{'sub': 2', '5, 'POfrom about 10 mol % to about 50 mol %; and'}{'sub': 2', '3, 'an optional addition of one or more of ...

CERAMIC SUBSTRATE

A ceramic substrate includes a ceramic layer mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag). In an adjacent region located adjacent to the conductor trace, the concentration of boron atoms (B) contained in the ceramic layer increases toward the conductor trace. 1. A ceramic substrate comprising a ceramic layer mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag) , wherein in an adjacent region located adjacent to the conductor trace , the concentration of boron atoms (B) contained in the ceramic layer increases toward the conductor trace.2. The ceramic substrate according to claim 1 , wherein the adjacent region includes a region in which the concentration of boron atoms (B) is at least three times that in a central region of the ceramic layer centrally located in a thickness direction.3. The ceramic substrate according to claim 1 , wherein the conductor trace contains at least either of lanthanum atoms (La) and titanium atoms (Ti).4. The ceramic substrate according to claim 1 , wherein the ceramic layer contains borosilicate glass and alumina (AlO). The present invention relates to a ceramic substrate.There has been known a ceramic substrate having a ceramic layer mainly formed of a glass ceramic and a conductor trace containing silver (Ag) as a main component. Such a ceramic substrate is formed by applying a conductor paste which is the pre-firing form of the conductor trace to a green sheet which is the pre-firing form of the ceramic layer and then firing the green sheet carrying the conductor paste applied thereto. Such a ceramic substrate is also called a low temperature co-fired ceramic (LTCC) substrate.When the ceramic substrate is formed by firing, a silver component of the conductor paste diffuses into the ceramic layer. This may cause, for example, formation of voids in the ceramic layer, deformation of the ceramic layer, and change of the color of the ceramic layer. It is considered that ...

GLASS FOR CHEMICAL STRENGTHENING

There is provided a glass for chemical strengthening having a gray-based color tone and excelling in characteristics preferred for the purposes of housing or decoration of an electronic device, that is, bubble quality, strength, and light transmittance characteristics. A glass for chemical strengthening contains, in mole percentage based on following oxides, 55% to 80% of SiO, 3% to 16% of AlO, 0% to 12% of BO, 5% to 16% of NaO, 0% to 4% of KO, 0% to 15% of MgO, 0% to 3% of CaO, 0% to 18% of ΣRO (where R represents Mg, Ca, Sr, Ba or Zn), 0% to 1% of ZrO, 0.01% to 0.2% of CoO, 0.05% to 1% of NiO, and 0.01% to 3% of FeO. 1. A glass for chemical strengthening comprising , in mole percentage based on following oxides , 55% to 80% of SiO , 3% to 16% of AlO , 0% to 12% of BO , 5% to 16% of NaO , 0% to 4% of KO , 0% to 15% of MgO , 0% to 3% of CaO , 0% to 18% of ΣRO (where R represents Mg , Ca , Sr , Ba or Zn) , 0% to 1% of ZrO , 0.01% to 0.2% of CoO , 0.05% to 1% of NiO , and 0.01% to 3% of FeO.2. The glass for chemical strengthening according to claim 1 , comprising 0.005% to 3% of a color correcting component having at least one metal oxide selected from the group consisting of oxides of Ti claim 1 , Cu claim 1 , Ce claim 1 , Er claim 1 , Nd claim 1 , Mn and Se.3. The glass for chemical strengthening according to claim 1 , comprising 0.1% to 1% of TiO.4. The glass for chemical strengthening according to claim 1 , comprising 0.1% to 3% of CuO.5. The glass for chemical strengthening according to claim 2 , comprising 0.005% to 2% of a color correcting component having at least one metal oxide selected from the group consisting of oxides of Ce claim 2 , Er claim 2 , Nd claim 2 , Mn and Se.6. The glass for chemical strengthening according to claim 1 ,{'sub': 3', '4', '2', '3, 'wherein a content ratio CoO/FeOis 0.01 to 0.5.'}7. The glass for chemical strengthening according to claim 1 ,{'sub': 2', '2', '3', '2', '3', '2', '2', '3', '3', '4, 'wherein a content ratio (SiO+AlO+ ...

GLASS-CERAMIC AND SUBSTRATE THEREOF

A glass ceramic contains the following components by wt %: 60 to 80% of SiO; 4 to 20% of AlO; 0 to 15% of LiO; more than 0 but less than or equal to 12% of NaO; 0 to 5% of KO; more than 0 but less than or equal to 5% of ZrO; 0 to 5% of PO; and 0 to 10% of TiO. A crystalline phase contains at least one of RSiO, RSiO, RTiO, RTiO, RPO, RAlSiO, RAlSiOO, RAlSiO, RAlSiO, quartz and quartz solid solution. With a liquidus temperature below 1,450° C., a thermal conductivity above 2 w/m·k, and a Vickers hardness above 600 kgf/mm2, the glass ceramic is applicable to portable electronic devices and optical devices. 1. A glass ceramic , containing the following components by wt %: 60 to 80% of SiO; 4 to 20% of AlO; 0 to 15% of LiO; more than 0 but less than or equal to 12% of NaO; 0 to 5% of KO; more than 0 but less than or equal to 5% of ZrO; 0 to 5% of PO; and 0 to 10% of TiO , wherein a crystalline phase contains at least one selected from RSiO , RSiO , RTiO , RTiO , RPO , RAlSiO , RAlSiOO , RAlSiO , RAlSiO , quartz and quartz solid solution , and R is at least one selected from Li , Na and K.2. The glass ceramic according to claim 1 , further containing 0 to 5% of BO; and/or 0 to 2% of MgO; and/or 0 to 2% of ZnO; and/or 0 to 5% of CaO; and/or 0 to 5% of BaO; and/or 0 to 3% of FeO; and/or 0 to 2% of SnO; and/or 0 to 5% of SrO; and/or 0 to 10% of LaO; and/or 0 to 10% of YO; and/or 0 to 10% of NbO; and/or 0 to 10% of TaO; and/or 0 to 5% of WO.3. A glass ceramic claim 1 , containing the following components by wt %: 60 to 80% of SiO; 4 to 20% of AlO; 0 to 15% of LiO; more than 0 but less than or equal to 12% of NaO; more than 0 but less than or equal to 5% of ZrO; 0 to 5% of PO; 0 to 10% of TiO; 0 to 5% of BO; 0 to 5% of KO; 0 to 2% of MgO; 0 to 2% of ZnO; 0 to 5% of CaO; 0 to 5% of BaO; 0 to 3% of FeO; 0 to 2% of SnO; 0 to 5% of SrO; 0 to 10% of LaO; 0 to 10% of YO; 0 to 10% of NbO; 0 to 10% of TaO; 0 to 5% of WO; and 0 to 5% of a clarificant claim 1 , wherein a crystalline ...

COATED GLASSES WITH HIGH EFFECTIVE FRACTURE TOUGHNESS

Glass-based articles comprise high effective fracture toughness. Glass-based articles comprise: a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t), a substantially planar central portion, and a perimeter portion; a polymer coating disposed on at least a portion of at least one of the first or the second surfaces; and an effective fracture toughness that is greater than or equal to 1.25 MPa.mas measured at room temperature. 1. A glass-based article comprising:{'sub': 's', 'a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t), a substantially planar central portion, and a perimeter portion;'}a polymer coating disposed on at least a portion of at least one of the first or the second surfaces; and{'sup': '0.5', 'an effective fracture toughness that is greater than or equal to 1.25 MPa.mas measured at room temperature.'}2. The glass-based article of claim 1 , wherein the perimeter portion comprises finished edges.3. The glass-based article of claim 1 , wherein an average thickness of the polymer coating (t) is greater than or equal to 5 micrometers and/or is less than or equal to 150 micrometers claim 1 , and wherein tis greater than or equal to 0.02 mm and less than or equal to 1.3 mm.4. The glass-based article of claim 1 , wherein the polymer coating comprises a polymer comprising a first material index (MI) as defined by MI=θσ claim 1 , wherein θ is elongation of the polymer in percentage and σis tensile strength of the polymer in MPa claim 1 , where MIis greater than or equal to 35 MPa and/or less than or equal to 100 MPa.5. The glass-based article of claim 4 , wherein the polymer coating comprises a polymer comprising a second material index (MI) as defined by MI=θσ claim 4 , wherein θ is elongation of the polymer in percentage and σis tensile strength of the polymer in MPa claim 4 , where MIis greater than or equal to 12 MPa and/or less than or equal to 75 MPa. ...

Cordierite Glass-Ceramic

The present invention relates to an improved cordierite glass-ceramic. In order to improve the materials properties, it is proposed that the glass-ceramic comprising SiO 2 , Al 2 O 3 , MgO and Li 2 O contains cordierite as main crystal phase and that a secondary crystal phase of the glass-ceramic comprises high-quartz solid solution and/or keatite solid solution. The invention further relates to a process for producing such a glass-ceramic and the use of such a glass-ceramic.

FUSION FORMED AND ION EXCHANGED GLASS-CERAMICS

The present disclosure relates to fusion formable highly crystalline glass-ceramic articles whose composition lies within the SiO—RO—LiO/NaO—TiOsystem and which contain a silicate crystalline phase comprised of lithium aluminosilicate (β-spodumene and/or β-quartz solid solution) lithium metasilicate and/or lithium disilicate. Additionally, these silicate-crystal containing glass-ceramics can exhibit varying NaO to LiO molar ratio extending from the surface to the bulk of the glass article, particularly a decreasing LiO concentration and an increasing NaO concentration from surface to bulk. According to a second embodiment, disclosed herein is a method for forming a silicate crystalline phase-containing glass ceramic. 1. A translucent or opaque glass-ceramic comprising: a silicate crystalline phase , and a composition , in weight percent on an oxide basis , 40-80% SiO , 2-30% AlO , 2-10% LiO , 0-8% TiO , 0-3% ZrO , and from greater than 0% up to about 3% NaO ,{'sub': 2', '2', '3', '2', '3', '2', '2', '2', '3', '2', '3, 'wherein a molar ratio of any one or more of NaO/AlO+BOand LiO+NaO/AlO+BOis greater than about 0.8,'}{'sub': 2', '2, 'wherein the glass-ceramic is made from a glass that exhibits a liquidus viscosity of greater than about 75,000 poise, and wherein a molar ratio of NaO to LiO increases from a surface to a bulk of the glass-ceramic.'}2. The glass-ceramic of claim 1 , wherein the composition comprises any one or more of: 0-2% SnO claim 1 , 0-7% BO claim 1 , 0-4% MgO claim 1 , 0-12% ZnO claim 1 , 0-8% BaO claim 1 , 0-3% CaO claim 1 , 0-6% SrO claim 1 , 0-4% KO claim 1 , 0-1.0% SbO claim 1 , 0-0.25% Ag claim 1 , 0-0.25% CeO claim 1 , and 0-0.01% Au.3. The glass-ceramic of claim 1 , wherein the composition is within the SiO—RO—LiO/NaO—TiOsystem claim 1 , and wherein Rcomprises any one of B and A1.4. The glass-ceramic of claim 1 , wherein the glass-ceramic article is formed via down drawn glass process.5. The glass-ceramic of claim 1 , wherein the source of ...

METHOD FOR THE PREPARATION OF LITHIUM SILICATE GLASSES AND LITHIUM SILICATE GLASS CERAMICS

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. 1. Method for the preparation of a lithium silicate glass , a lithium silicate glass with nuclei which are suitable for forming lithium metasilicate and/or lithium disilicate crystals , or a lithium silicate glass ceramic , which comprises a step in which a melt of a starting glass which comprises cerium ions is reacted with at least one reducing gas.2. Method according to claim 1 , wherein the gas comprises hydrogen or comprises hydrogen and nitrogen.3. Method according to claim 1 , in which the starting glass comprises up to 5.0 wt.-% alkaline earth metal oxide.4. Method according to claim 3 , wherein the alkaline earth metal oxide is CaO claim 3 , BaO claim 3 , MaO claim 3 , SrOor a mixture thereof.7. Method according to claim 1 , in which the starting glass furthermore comprises terbium ions.8. Method according to for the preparation of a lithium silicate glass with nuclei which are suitable for forming lithium metasilicate and/or lithium disilicate crystals.9. Method according to for the preparation of a lithium silicate glass ceramic which comprises lithium metasilicate as main crystal phase and/or comprises more than 10 vol.-% lithium metasilicate crystals.10. Method according to claim 9 , wherein the lithium metasilicate glass ceramic comprises more than 20 vol.-% lithium metasilicate crystals.11. Method according to for the preparation of a lithium silicate glass ceramic which comprises lithium disilicate as main crystal phase and/or comprises more than 10 vol.-% lithium disilicate crystals.12. Method according to claim 11 , wherein the lithium silicate glass ceramic comprises more than 20 vol.-% lithium disilicate crystals.13. Method according to claim 1 , in ...

CRACK-RESISTANT GLASS-CERAMIC ARTICLES AND METHODS FOR MAKING THE SAME

Glass-ceramics exhibiting a Vickers indentation crack initiation threshold of at least 15 kgf are disclosed. These glass-ceramics may be ion exchangeable or ion exchanged. The glass-ceramics include a crystalline and amorphous phases generated by subjecting a thin precursor glass article to ceramming cycle having an average cooling rate in the range from about 10° C./minute to about 25° C./minute. In one or more embodiments, the crystalline phase may comprise at least 20 wt % of the glass-ceramics. The glass-ceramics may include β-spodumene ss as the predominant crystalline phase and may exhibit an opacity ≥about 85% over the wavelength range of 400-700 nm for an about 0.8 mm thickness and colors an observer angle of 10° and a CIE illuminant F02 determined with specular reflectance included of a* between −3 and +3, b* between −6 and +6, and L* between 88 and 97. 120-. (canceled)21. A glass-ceramic article comprising: [{'sub': '2', 'SiOin the range from 62 to 75;'}, {'sub': 2', '3, 'AlOin the range from 10.5 to 17;'}, {'sub': '2', 'LiO in the range from 5 to 13;'}, 'ZnO in the range from 0 to 4;', 'MgO in the range from 0 to 8;', {'sub': 2', '3, 'BOin the range from 0 to 4;'}, {'sub': '2', 'NaO in the range from 0 to 5;'}, {'sub': '2', 'KO in the range from 0 to 4;'}, {'sub': '2', 'ZrOin the range from 0 to 2;'}, {'sub': 2', '5, 'POin the range from 0 to 7;'}, {'sub': 2', '3, 'FeOin the range from 0 to 0.3;'}, {'sub': 'x', 'MnOin the range from 0 to 2;'}, {'sub': 2', '2', '2', '2', '3', '2', '3, 'claim-text': 'in the range from 0.7 to 1.5;', 'a ratio [LiO+NaO+KO+MgO+ZnO]/[AlO+BO]'}], 'a composition, in mole %, comprisinga crystalline phase, wherein the crystalline phase comprises β-spodumene; anda Vickers crack initiation threshold of at least 12 kgf.22. The glass-ceramic article of claim 21 , further comprising SnO.23. The glass-ceramic article of claim 21 , further comprising a compressive stress of at least 300 MPa.24. The glass-ceramic article of claim 23 , ...

NANOSTRUCTURED GLASSES AND VITROCERAMICS THAT ARE TRANSPARENT IN VISIBLE AND INFRA-RED RANGES

The present invention relates to novel vitroceramic or lens compositions that are nanostructured and transparent or translucent, including at least 97%, such as 97% to 100%, preferably 99% to 100%, by weight, relative to the total weight of the material, of a composition having the following formula I: (GeO)(SiO)(BO)(GaO)(Oxy)(Oxy)(I) where Oxyis an oxide selected from ZnO, MgO, NbO, WO, NiO, SnO, TiO, BiO, AgO, CaO, MnO, or a mixture thereof, selected preferably from ZnO, MgO, NbO, WO, NiO, SnO, AgO, CaO, MnO, or a mixture thereof, selected more preferably from ZnO, MgO, AgO, BiO, NbO, Or a mixture thereof, selected most preferably from ZnO, MgO, AgO, NbO, or a mixture thereof, and Oxyis an oxide selected from NaO, KO or a mixture thereof, Oxyis preferably NaO, and x, y, z, a, b and k are as defined in claim , to the manufacturing method thereof and to the uses thereof in the field of optics. 160-. (canceled)61. A nanostructured vitroceramic , either transparent or translucent , with essentially zero LiO content , containing 97% to 100% by weight in relation to the overall weight of the material , of a composition of the following formula I:{'br': None, 'sub': 2', 'x', '2', 'y', '2', '3', 'z', '2', '3', 'a', '1', 'b', '2', 'k, '(GeO)(SiO)(BO)(GaO)(Oxy)(Oxy)\u2003\u2003(I)'}where{'sub': 1', '2.5', '3', '2', '1.5, 'Oxyis an oxide selected from among ZnO, MgO, NbO, WO, NiO, SnO, TiO, BiO, AgO, CaO, MnO, or a mixture thereof, and'}{'sub': 2', '2', '2, 'Oxyis an oxide selected from NaO, KO, or a mixture thereof, and'}x is within the range between 0 and 98, andy is within the range between 0 and 60, andx and y are not simultaneously zero, andz is within the range between 0 and 20,x, y, z are such that x+y+z lie within the range between 40 and 98,a is within the range between 0.1 and 50,b is within the range between 0 and 35, andk is within the range between 0 and 7, andx, y, z, a, b and k are such that x+y+z+a+b+k=100.62. Nanostructured glass , either transparent or ...

APPARATUS FOR HOLDING GLASSWARE DURING PROCESSING

An apparatus for holding glassware during processing includes a plurality of ware keepers, each ware keeper configured to receive a piece of glassware during the processing. Each ware keeper comprises a glass contact surface comprising a silicate material having a Knoop hardness less than or equal to 400 HKand a specific gravity greater than or equal to 1.5 and less than or equal to 6.

CRYSTALLIZED GLASS OF THREE-DIMENSIONAL SHAPE, CHEMICALLY STRENGTHENED GLASS OF THREE-DIMENSIONAL SHAPE, AND METHOD FOR PRODUCING CRYSTALLIZED GLASS OF THREE-DIMENSIONAL SHAPE AND CHEMICALLY STRENGTHENED GLASS OF THREE-DIMENSIONAL SHAPE

The present invention provides crystallized glass of three-dimensional shape for easily producing chemically strengthened glass of three-dimensional shape that resists damage and has exceptional transparency. This crystallized glass of three-dimensional shape: 1. A crystallized glass for a cover glass for a mobile device , comprising a petalite crystal and a lithium disilicate crystal ,having an average transmittance of a light at a wavelength of 380 nm to 780 nm of 80% or more in terms of a thickness of 0.8 mm, andhaving a Young's modulus of 90 GPa or more.2. The crystallized glass according to claim 1 , wherein the Young's modulus is 100 GPa or more.3. The crystallized glass according to claim 1 , wherein the average transmittance is 85% or more.4. The crystallized glass according to claim 1 , having a fracture toughness value of 0.8 MPa·mor more.5. The crystallized glass according to claim 1 , having a haze value in terms of a thickness of 0.8 mm of 1% or less.6. The crystallized glass according to claim 1 , having a Vickers hardness of 680 or more.7. The crystallized glass according to claim 1 , having a Vickers hardness of 700 or more.8. The crystallized glass according to claim 1 , comprising claim 1 , in mass % on an oxide basis:{'sub': '2', 'from 45 to 74% of SiO; and'}{'sub': '2', 'from 4 to 11.2% of LiO.'}9. The crystallized glass according to claim 1 , comprising claim 1 , in mass % on an oxide basis claim 1 , from 5 to 8% of AlO.10. The crystallized glass according to claim 1 , comprising claim 1 , in mass % on an oxide basis claim 1 , from 1 to 10% in total of either one or more of SnOand ZrO.11. The crystallized glass according to claim 1 , comprising claim 1 , in mass % on an oxide basis claim 1 , from 1 to 7% of PO.12. The crystallized glass according to claim 1 , being a chemically strengthened glass having a compressive stress layer on a surface thereof13. The crystallized glass according to claim 1 , having an average thermal expansion coefficient ...

TUNABLE GLASS COMPOSITIONS HAVING IMPROVED MECHANICAL DURABILITY

A glass composition includes: greater than or equal to 24 mol % and less than or equal to 60 mol % SiO; greater than or equal to 23 mol % and less than or equal to 35 mol % AlO; greater than or equal to 3.5 mol % and less than or equal to 35 mol % BO; greater than 0 mol % and less than or equal to 20 mol % LiO; greater than or equal to 0 mol % and less than or equal to 10 mol % NaO; and greater than or equal to 0 mol % and less than or equal to 3 mol % KO. The sum of LiO, NaO, and KO (i.e., RO) in the glass composition may be greater than or equal to 12 mol % and less than or equal to 20 mol %. 1. A glass composition comprising:{'sub': '2', 'greater than or equal to 24 mol % and less than or equal to 60 mol % SiO;'}{'sub': 2', '3, 'greater than or equal to 23 mol % and less than or equal to 35 mol % AlO;'}{'sub': 2', '3, 'greater than or equal to 3.5 mol % and less than or equal to 35 mol % BO;'}{'sub': '2', 'greater than 0 mol % and less than or equal to 20 mol % LiO;'}{'sub': '2', 'greater than or equal to 0 mol % and less than or equal to 10 mol % NaO; and'}{'sub': 2', '2', '2', '2', '2', '2, 'greater than or equal to 0 mol % and less than or equal to 3 mol % KO, wherein RO is greater than or equal to 12 mol % and less than or equal to 20 mol %, RO being the sum of LiO, NaO, and KO.'}2. The glass composition of claim 1 , wherein AlO+BOis greater than or equal to 28 mol % and less than or equal to 60 mol %.3. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 24 mol % and less than or equal to 34 mol % AlO.4. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 5 mol % and less than or equal to 30 mol % BO5. The glass composition of claim 1 , wherein AlO−RO−RO is greater than or equal to −0.5 mol %.6. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 3 mol % and less than or equal to 18 mol % LiO.7. The glass composition ...

HIGH-STRENGTH, TRANSLUCENT MG-HIGH QUARTZ MIXED CRYSTAL GLASS CERAMICS

The invention relates to the use of glass ceramics based on a high quartz mixed crystal system for dental purposes, which can be easily mechanically processed in an intermediate stage of crystallization and present high-strength, highly translucent and chemically stable glass ceramics following complete crystallization, wherein said glass or ceramics still have phosphorus and a transition metal compound, selected from titanium and zirconium or a mixture thereof. 1. Use of a magnesium oxide/aluminum oxide/silicon oxide glass or glass ceramics for application in dentistry , wherein said glass or glass ceramics have phosphorus and a transition metal compound , selected from the group consisting of titanium and zirconium or a mixture thereof.2. Use of a magnesium oxide/aluminum oxide/silicon oxide glass or glass ceramics according to claim 1 , wherein said magnesium oxide/aluminum oxide/silicon oxide glass or glass ceramics is a pure oxide glass.5. Use of a magnesium oxide/aluminum oxide/silicon oxide glass or glass ceramics according to claim 1 , wherein the primary crystalline phase is a magnesium high quartz mixed crystal.6. Use of a magnesium oxide/aluminum oxide/silicon oxide glass or glass ceramics according to claim 1 , comprising a crystalline phase consisting of lanthanum phosphate.7. Use according to by means of CAD/CAM and/or for chairside applications.8. Use according to claim 1 , wherein said glass or glass ceramics have additional transition metal cations and are used as dental coloring.9. Use according to claim 1 , wherein a fluorescence additive is added to said glass or glass ceramics to produce a fluorescence effect emulating nature claim 1 , preferably selected from cations of rare-earth elements claim 1 , particularly preferably from Er claim 1 , Eu claim 1 , Tb claim 1 , Pr claim 1 , and Gd.10. Use according to claim 1 , comprising:melting glass at temperatures between 1500 and 1800° C.,active or passive cooling of said glass to room temperature, ...

LITHIUM DISILICATE GLASS-CERAMIC COMPOSITIONS AND METHODS THEREOF

A bioactive glass-ceramic composition as defined herein. Also disclosed are methods of making and using the disclosed compositions. 111-. (canceled)12. A bioactive composition , comprising: a first crystalline phase comprised of lithium disilicate; and', 'a second crystalline phase selected from the group consisting of at least one of: wollastonite, fluoroapatite, cristobalite, β-quartz, lithiophosphate, or a combination thereof; and, 'a glass-ceramic comprised ofat least one live osteoblast cell.13. The bioactive composition of claim 12 , wherein the glass-ceramic composition comprises a source of:{'sub': '2', '50 to 75 wt % SiO,'}{'sub': 2', '3, '1 to 5 wt % AlO,'}{'sub': 2', '5, '1 to 8 wt % PO,'}2 to 10 wt % CaO,{'sub': '2', '5 to 20 wt % LiO,'}{'sub': '2', '0.5 to 5 wt % NaO,'}{'sub': '2', '0.5 to 8 wt % ZrO, and'}{'sup': '−', '0.1 to 1.0 wt % F, based on a 100 wt % total of the composition.'}14. The bioactive composition of claim 12 , wherein the glass-ceramic composition comprises a source of:{'sub': '2', '50 to 60 wt % SiO,'}{'sub': 2', '3, '1 to 3 wt % AlO,'}{'sub': 2', '5, '2 to 6 wt % PO,'}4 to 8 wt % CaO,{'sub': '2', '7.5 to 12.5 wt % LiO,'}{'sub': '2', '0.5 to 2 wt % NaO,'}{'sub': '2', '1 to 4 wt % ZrO, and'}{'sup': '−', '0.2 to 0.8 wt % F, based on a 100 wt % total of the composition.'}15. The bioactive composition of claim 14 , further comprising: a source of 0.1 to 10 wt % BO claim 14 , based on a 100 wt % total of the composition.16. A method of culturing osteoblast cells claim 14 , comprising:{'claim-ref': {'@idref': 'CLM-00012', 'claim 12'}, 'contacting the bioactive composition of with a liquid medium.'}17. The method of claim 16 , wherein the contacting is configured to produce a proliferation of the at least one osteoblast cell on a surface of the bioactive composition.18. The method of claim 16 , wherein the contacting is configured to produce a proliferation of the at least one osteoblast cell in the liquid medium.19. The method of claim 18 , ...

GLASS-CERAMICS AND METHODS OF MAKING THE SAME

Glass-ceramics comprising AlOand rare earth oxide, yttrium oxide, and/or alkaline earth oxide. Uses of the glass-ceramics include dental articles, orthodontic appliances, abrasive particles, cutting tools, infrared windows, and ceramic bearings. 1. A glass-ceramic comprising at least 20 by weight alumina and at least 15 percent by weight collectively of rare earth oxide , yttrium oxide , and alkaline earth oxide , based on the total weight of the glass-ceramic , wherein the rare earth is selected from the group consisting of La , Ce , Pr , Nd , Sm , Eu , Gd , and combinations thereof , wherein the alkaline earth oxide is selected from the group consisting of BaO , CaO , SrO , MgO , and combinations thereof , wherein the molar ratio of the alumina to the collective rare earth oxide , yttrium oxide , and alkaline earth oxide is up to 3.2 , and wherein the glass-ceramic has an average hardness in a range from 8 GPa to 12 GPa and an average flexural strength of at least 500.2. The glass-ceramic of claim 1 , wherein at least a portion of the alumina and rare earth oxide are present as at least 20 percent by volume of ReAlO claim 1 , based on the total volume of the glass-ceramic claim 1 , and wherein Re is selected from the group consisting of La claim 1 , Ce claim 1 , Pr claim 1 , Nd claim 1 , Sm claim 1 , Eu claim 1 , Gd claim 1 , and combinations thereof.3. The glass-ceramic of that is optically translucent.4. The glass-ceramic of further comprising at least 5 percent by weight collectively of at least one of zirconia or hafnia claim 1 , based on the total weight of the glass-ceramic claim 1 , wherein the molar ratio of alumina to the collective rare earth oxide claim 1 , yttrium oxide claim 1 , and alkaline earth oxide is up to 3.5. The glass-ceramic of claim 1 , wherein the glass-ceramic is a dental article.6. A method of making the glass-ceramic of claim 1 , the method comprising heat-treating a glass having a Tand the glass comprising at least 20 percent by weight ...

PATTERNING OF HIGH REFRACTIVE INDEX GLASSES BY PLASMA ETCHING

Plasma etching processes for forming patterns in high refractive index glass substrates, such as for use as waveguides, are provided herein. The substrates may be formed of glass having a refractive index of greater than or equal to about 1.65 and having less than about 50 wt % SiO. The plasma etching processes may include both chemical and physical etching components. In some embodiments, the plasma etching processes can include forming a patterned mask layer on at least a portion of the high refractive index glass substrate and exposing the mask layer and high refractive index glass substrate to a plasma to remove high refractive index glass from the exposed portions of the substrate. Any remaining mask layer is subsequently removed from the high refractive index glass substrate. The removal of the glass forms a desired patterned structure, such as a diffractive grating, in the high refractive index glass substrate. 128.-. (canceled)29. A method of forming an optical waveguide structure , the method comprising:identifying desired dimensional characteristics of first features to be formed in a high-index glass substrate;identifying etching characteristics of an etching process that is used for forming at least the first features in the high-index glass substrate;determining, based on the identified etching characteristics, biased dimensional characteristics of second features of a patterned layer that is to be formed on the high-index glass substrate prior to forming the first features in the high-index glass substrate;forming the patterned layer on the high-index glass substrate, the forming including forming the second features in the patterned layered, the second features having the biased dimensional characteristics; andtransferring, using the etching process, a pattern of the second features, having the biased dimensional characteristics, into the high-index glass to form the first features, having the desired dimensional characteristics in the high-index ...

MIRROR AND MIRROR SUBSTRATE WITH HIGH ASPECT RATIO, AND METHOD AND MEANS FOR PRODUCING SUCH A MIRROR SUBSTRATE

A mirror, a mirror substrate, a method for producing are provided. The mirror substrate is made of a material having a coefficient of mean linear thermal expansion of less than or equal to 1*10/K. The mirror substrate includes at least one feature selected from a group consisting of: a ratio of a lateral dimension to a maximum thickness of at least 100, a ratio of the lateral dimension to the maximum thickness of at least 150, a ratio of the lateral dimension to the maximum thickness of at least 200, a ratio of the lateral dimension to the maximum thickness of at least 300, a weight per unit area of 100 kg/mor less, a weight per unit area of 50 kg/mor less, a weight per unit area of 30 kg/mor less, a weight per unit area of 15 kg/mor less, a mirror surface with a roughness (R) of at most 3.5 μm, and a mirror surface with a roughness (R) of less than 1.2 μm. 1. A mirror substrate comprising:{'sup': '−6', 'a material having a coefficient of mean linear thermal expansion of less than or equal to 1*10/K; and'}{'sup': 2', '2', '2', '2, 'sub': a', 'a, 'at least one feature selected from a group consisting of: a ratio of a lateral dimension to a maximum thickness of at least 100, a ratio of the lateral dimension to the maximum thickness of at least 150, a ratio of the lateral dimension to the maximum thickness of at least 200, a ratio of the lateral dimension to the maximum thickness of at least 300, a weight per unit area of 100 kg/mor less, a weight per unit area of 50 kg/mor less, a weight per unit area of 30 kg/mor less, a weight per unit area of 15 kg/mor less, a mirror surface with a roughness (R) of at most 3.5 μm, and a mirror surface with a roughness (R) of less than 1.2 μm.'}2. The mirror substrate of claim 1 , wherein the coefficient of mean linear thermal expansion is less than or equal to 0.05*10/K.3. The mirror substrate of claim 1 , further comprising a maximum thickness of 50 mm or less.4. The mirror substrate of claim 1 , further comprising a maximum ...

GTMS CONNECTOR FOR OIL AND GAS MARKET

A feed-through element for harsh environments is provided that includes a support body with at least one access opening, in which at least one functional element is arranged in an electrically insulating fixing material. The electrically insulating fixing material contains a glass or a glass ceramic with a volume resistivity of greater than 1.0×10Ω cm at the temperature of 350° C. The glass or a glass ceramic has a defined composition range in the system SiO—BO-MO. 2. The feed-through element according to claim 1 , wherein the at least one functional element is selected from the group consisting of an electrical conductor claim 1 , a waveguide claim 1 , a cooling-fluid line claim 1 , a housing of a thermo element claim 1 , and a hollow element which carries further functional elements.3. The feed-through element according to claim 1 , wherein the electrically insulating fixing material fixes the at least one functional element within the access opening to withstand pressures in excess of 42000 psi at an operational temperature of 260° C.4. The feed-through element according to claim 1 , wherein the electrically insulating fixing material hermetically seals the access opening to a helium leaking rate below 1.0×10cc/sec at room temperature or 1.69×10mbar l/s at room temperature.5. The feed-through element according to claim 1 , wherein the electrically insulating fixing material fixes the at least one functional element within the access opening to withstand pressures in excess of 65 claim 1 ,000 psi at room temperature.6. The feed-through element according to claim 1 , wherein the electrically insulating fixing material has a CTE that is smaller than a CTE of the support body claim 1 , whereby at least at room temperature the support body exerts an additional holding pressure to the electrically insulating fixing material.7. The feed-through element according to claim 1 , wherein the support body is made from a ceramic selected from the group consisting of ...

SILICOBORATE AND BOROSILICATE GLASSES WITH HIGH REFRACTIVE INDEX AND LOW DENSITY

Glasses containing silicon dioxide (SiO) and/or boron oxide (BO) as glass formers and having a refractive index nof greater than or equal to 1.9, as measured at 587.56 nm, and a density of less than or equal to 5.5 g/cm, as measured at 25° C., are provided. Optionally, the glasses may be characterized by a high transmittance in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and/or good glass forming ability. 1. A glass , comprising:{'sub': '2', '#text': 'SiOof from 14.0 mol % to 50.0 mol %;'}{'sub': ['2', '3'], '#text': 'BOat greater than 0.0 mol %;'}{'sub': '2', '#text': 'TiOfrom 5.0 mol % to 40.0 mol %;'}{'sub': ['2', '5'], '#text': 'NbOfrom 2.2 mol % to 50.0 mol %;'}{'sub': '2', '#text': 'ZrOfrom 2.5 mol % to 25.0 mol %;'}{'sub': ['m', 'n'], '#text': 'a total content of rare earth metal oxides (REO) of from 0.0 mol % to 30.0 mol %; and'}other oxide species, when present, present at 0.5 mol % or less, and{'sub': ['2', '3', '2', '2', '3', '2'], '#text': 'wherein a ratio of an amount of BOto an amount of SiO(BO/SiO), in mole percent of oxide, is at least 0.050, and'}{'sub': ['2', '3'], '#text': 'wherein the glass is substantially free of YO.'}2. The glass of claim 1 , wherein the glass comprises at least one of:{'sub': '2', '#text': 'TiOfrom 12.0 mol % to 40.0 mol %;'}{'sub': '2', '#text': 'ZrOfrom 2.5 mol % to 13.0 mol %; and'}{'sub': ['2', '5'], '#text': 'NbOfrom 2.2 mol % to 30.0 mol %.'}3. The glass of claim 1 , wherein at least one of the one or more rare earth metal oxides is selected from the group of LaO claim 1 , GdOand YbO.4. The glass of claim 1 , wherein the glass has:{'sub': 'd', '#text': 'a refractive index nof from 1.90 to 2.10, as measured at a wavelength of 587.56 nm; and'}{'sub': 'RT', 'sup': '3', '#text': 'a density dof 5.5 g/cmor less, as measured at 25° C.'}6. The glass of claim 1 , wherein the glass is characterized by an ability to cool claim 1 , in air claim 1 , from 1100° C. to 500° C. in 2.5 minutes without ...

METHOD FOR ENGINEERED POLYPHASE CELLULAR MAGMATICS AND ARTICLES THEREOF

Methods for engineered polyphase cellular magmatics and articles thereof are disclosed. For example, the magmatics may include multiple phases including a crystalline phase and an amorphous phase. The magmatics may also include one or more reactive agents that may be disposed within cell structures of the magmatics and/or on an exterior of the magmatics, giving the resulting magmatics reactive properties that may differ based on the selected reactive agents and/or placement of the reactive agents within and/or through the magmatics. 1. An article of manufacture , comprising: a non-crystalline portion disposed such that the non-crystalline portion is configured to interact with a substance that comes into contact with the rigid foam mass; and', 'a crystalline portion that is bound to the amorphous portion, in line with the definition of glass ceramics;, 'a rigid foam mass being composed of at least one silicate based component and havingwherein at least one of the amorphous portion or the crystalline portion includes a material configured to react when contacted by the substance.2. The article of manufacture of claim 1 , wherein the rigid foam mass includes open cell structures.3. The article of manufacture of claim 1 , wherein the rigid foam mass includes closed cell structures.4. The article of manufacture of claim 1 , wherein the rigid foam mass includes open cell structures and closed cell structures.5. An article of manufacture claim 1 , comprising: an amorphous portion disposed such that the amorphous portion is configured to interact with a substance that contacts the amorphous portion; and', 'a crystalline portion bound to the amorphous portion, the crystalline portion disposed such that the crystalline portion is configured to at least contact the substance;, 'an engineered foam mass havingwherein at least one of the amorphous portion or the crystalline portion includes a material configured to react when contacted by the substance.6. The article of ...

STEAM STRENGTHENABLE GLASS COMPOSITIONS WITH LOW PHOSPHOROUS CONTENT

Glass-based articles that include a compressive stress layer extending from a surface of the glass-based article to a depth of compression are formed by exposing glass-based substrates to water vapor containing environments. The glass-based substrates include low amounts of phosphorous. The methods of forming the glass-based articles may include elevated pressures and/or multiple exposures to water vapor containing environments. 1. A method , comprising:exposing a glass-based substrate to a steam environment with a pressure greater than or equal to 0.1 MPa, and a temperature of greater than or equal to 150° C. to form a glass-based article with compressive stress layer extending from the surface of the glass-based article to a depth of compression and a hydrogen-containing layer extending from the surface of the glass-based article to a depth of layer,wherein the compressive stress layer comprises a compressive stress of greater than or equal to 10 MPa, a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the depth of layer, and the glass-based substrate comprises:{'sub': '2', 'greater than or equal to 55 mol % to less than or equal to 70 mol % SiO,'}{'sub': 2', '3, 'greater than or equal to 5 mol % to less than or equal to 13 mol % AlO,'}{'sub': 2', '5, 'greater than or equal to 0.1 mol % to less than or equal to 3 mol % PO,'}{'sub': '2', 'greater than or equal to 14 mol % to less than or equal to 23 mol % KO, and'}greater than or equal to 1 mol % to less than or equal to 4 mol % ZnO.2. The method of claim 1 , wherein the glass-based substrate comprises greater than or equal to 0 mol % to less than or equal to 5 mol % BO.3. The method of claim 1 , wherein the glass-based substrate comprises greater than or equal to 0 mol % to less than or equal to 1 mol % NaO.4. The method of claim 1 , wherein the glass-based substrate is substantially free of NaO.5. The method of claim 1 , wherein the glass-based substrate ...

DURABLE GLASS CERAMIC COVER GLASS FOR ELECTRONIC DEVICES

The invention relates to glass articles suitable for use as electronic device housing/cover glass which comprise a glass ceramic material. Particularly, a cover glass comprising an ion-exchanged glass ceramic exhibiting the following attributes (1) optical transparency, as defined by greater than 90% transmission at 400-750 nm; (2) a fracture toughness of greater than 0.6 MPa·m; (3) a 4-point bend strength of greater than 350 MPa; (4) a Vickers hardness of at least 450 kgf/mmand a Vickers median/radial crack initiation threshold of at least 5 kgf; (5) a Young's Modulus ranging between about 50 to 100 GPa; (6) a thermal conductivity of less than 2.0 W/m° C., and (7) and at least one of the following attributes: (i) a compressive surface layer having a depth of layer (DOL) greater and a compressive stress greater than 400 MPa, or, (ii) a central tension of more than 20 MPa. 1. An article suitable as a cover glass for a portable electronic device , the article comprising a glass ceramic exhibiting:a. optical transparency of greater than 60%, as defined by the transmission of light over the range of from 400-750 nm through 1 mm of the glass ceramic;b. colorlessness, as defined by having the values of L*≧90; 0.1≦a*≦−0.1; and 0.4≦b*≦−0.4 on the CIE 1976 Lab color space as measured in transmission through 1 mm of glass ceramic; [{'sup': '1/2;', '(i) a fracture toughness of greater than 0.60 MPa·m'}, '(ii) a 4-point bend strength of greater than 350 MPa;', {'sup': '2', '(iii) a Vickers hardness of at least 450 kgf/mm;'}, '(iv) a Vickers median/radial crack initiation threshold of at least 5 kgf;', "(v) a Young's Modulus ranging between 50 to 100 GPa; and", '(vi) a thermal conductivity of less than 2.0 W/m° C.; and, 'c. at least one of the following attributes (i) a compressive surface layer having a depth of layer (DOL) greater than or equal to 20 μm and a compressive stress greater than 400 MPa, or,', '(ii) a central tension of more than 20 MPa., 'd. at least one of the ...

HIGH STRENGTH AND AESTHETIC LITHIUM DISILICATE CRYSTALLINE GLASS-CERAMICS CONTAINING CRISTOBALITE CRYSTAL AND PREPARATION METHOD THEREOF

Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal. 1. A lithium silicate glass composition for crystallizing to a lithium disilicate glass-ceramic having a crystobalite crystal phase , the lithium silicate glass composition comprising:{'sub': 2', '2', '2', '5', '2', '3', '2, 'a glass component comprising 11-13 wt % LiO, 70.0-77.0 wt % SiO, 2-3 wt % POas a nuclei formation agent, 2-5 wt % AlOto increase glass transition temperature, softening temperature, and chemical durability of the glass component, 2.0-3.0 wt % ZrO, and 1-4 wt % colorant.'}2. The lithium silicate glass component of claim 1 , further comprising 1-5 wt % KO and/or NaO claim 1 , and 0.5-3 wt % CaO.3. The lithium silicate glass component of claim 2 , wherein the lithium disilicate glass-ceramic comprises 0.5-2 wt % KO.4. The lithium silicate glass composition of claim 1 , wherein an amount of the SiOis in a range of 72.0-75.0 wt % claim 1 , and wherein the glass component has a thermal expansion coefficient in a range of 9.5-9.9×10/° C. in 100-400° C. range.5. The lithium silicate glass composition of claim 1 , wherein the glass component comprises the 2.0-3.0 wt % ZrO claim 1 , without including MgO claim 1 , ZnO claim 1 , F claim 1 , and LaO.6. A lithium disilicate glass-ceramic having a crystobalite crystal phase claim 1 , the lithium disilicate glass-ceramic comprising the glass component of .7. The lithium disilicate glass-ceramic of claim 6 , further comprising 1-5 wt % KO and/or NaO claim 6 , and 0.5-3 wt % CaO.8. The lithium disilicate glass-ceramic of claim 7 , wherein the ...

TRANSPARENT, COLORLESS, TIN-FINED LAS GLASS-CERAMICS WITH IMPROVED MICROSTRUCTURE AND OPTICAL PROPERTIES

Transparent, essentially colorless and non-diffusing β-quartz glass-ceramics and glass compositions for forming the same have a composition, free of arsenic oxide, antimony oxide and rare earth oxides except for inevitable trace amounts, which contains, expressed as percentages by weight of oxides 62-72% of SiO, 20-23% of AlO, 2.8-5% of LiO, 0.1-0.6% of SnO, 1.9-4% of TiO, 1.6-3% of ZrO, less than 0.4% of MgO, 2.5-6% of ZnO and/or BaO and/or SrO, less than 250 ppm of FeO; and their crystallites present in the β-quartz solid solution have an average size of less than 35 nm. The glass-ceramics exhibit low thermal expansion and are easily obtained at an industrial scale. 1. A transparent , essentially colorless and non-diffusing glass-ceramic of the lithium aluminosilicate type containing a β-quartz solid solution as a main crystalline phase , wherein its composition , free of arsenic oxide , antimony oxide and rare earth oxides except for inevitable trace amounts , contains , expressed as percentages by weight of oxides:{'sub': '2', '62-72% of SiO,'}{'sub': 2', '3, '20-23% of AlO,'}{'sub': '2', '2.8-5% of LiO,'}{'sub': '2', '0.1-0.6% of SnO,'}{'sub': '2', '1.9-4% of TiO,'}{'sub': '2', '1.6-3% of ZrO,'}less than 0.4% of MgO,2.5-6% of ZnO and/or BaO and/or SrO,{'sub': 2', '3, 'less than 250 ppm of FeO; and the crystallites present in said β-quartz solid solution have an average size of less than 35 nm.'}2. The glass-ceramic according to claim 1 , the composition of which contains less than 0.1% of MgO.3. The glass-ceramic according to claim 1 , the composition of which is free of MgO except for inevitable trace amounts.4. The glass-ceramic according to claim 1 , the composition of which contains from 3.5 to 5% of at least one of ZnO claim 1 , BaO and SrO.5. The glass-ceramic according to claim 1 , the composition of which contains from 0.4 to 3% of ZnO claim 1 , and from 0 to 5% of BaO.6. The glass-ceramic according to claim 1 , the composition of which contains from 0. ...

LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A MONOVALENT METAL OXIDE

Lithium silicate glass ceramics and glasses comprising specific oxides of monovalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials. 1. Lithium silicate glass ceramic which comprises a monovalent metal oxide selected from RbO , CsO and mixtures thereof.2. Glass ceramic according to claim 1 , wherein lithium silicate glass ceramic is excluded which comprises at least 6.1 wt.-% ZrO.3. Glass ceramic according to claim 1 , wherein lithium silicate glass ceramic is excluded which comprises at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium claim 1 , oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.4. Glass ceramic according to claim 1 , which comprises less than 1.0 wt.-% KO.5. Glass ceramic according to claim 1 , which comprises less than 5.3 wt.-% AlOor in which the molar ratio of monovalent metal oxide to AlOis at least 0.5.6. Glass ceramic according to claim 1 , which comprises less than 3.8 wt.-% BaO.7. Glass ceramic according to claim 1 , which comprises the monovalent metal oxide or mixtures thereof in an amount of from 0.1 to 17.0 wt.-%.8. Glass ceramic according to claim 1 , which has lithium metasilicate as a main crystal phase.9. Glass ceramic according to claim 1 , which has lithium disilicate as a main crystal phase.10. Glass ceramic according to claim 1 , which comprises 55.0 to 85.0 wt.-% SiO.11. Glass ceramic according to claim 1 , which comprises 9.0 to 20.0 wt.-% LiO.12. Glass ceramic according to claim 1 , which comprises 0 to 12.0 wt.-% PO.13. Glass ceramic according to claim 1 , which comprises KO claim 1 , NaO and mixtures thereof in an amount of less than 1.0 wt.-%.15. Glass ceramic according to claim 1 , which has lithium disilicate as a main crystal phase and a fracture toughness claim 1 , measured as Kvalue claim 1 , of at least about 2.0 MPa·m.16. Glass ceramic according to claim 1 , wherein ...

ULTRAVIOLET TRANSMITTING GLASS

An ultraviolet transmitting glass containing, in mole percentage based on oxides, 55 to 80% of SiO, 12 to 27% of BO, 4 to 20% of R20 (where R represents an alkali metal selected from a group consisting of Li, Na, and K) in total, 0 to 3.5% of AlO, 0 to 5% of R′O (where R′ represents an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba) in total, 0 to 5% of ZnO, and 0 to 10% of ZrO, wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more. The glass with high ultraviolet light transmittance, in particular, high deep ultraviolet light transmittance is provided. 1. An ultraviolet transmitting glass containing , in mole percentage based on oxides ,{'sub': '2', '55 to 80% of SiO,'}{'sub': 2', '3, '12 to 27% of BO,'}{'sub': '2', '4 to 20% of RO in total, where R represents at least one kind of an alkali metal selected from a group consisting of Li, Na, and K,'}{'sub': 2', '3, '0 to 3.5% of AlO,'}0 to 5% of R′O in total, where R′ represents at least one kind of an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba,0 to 5% of ZnO, and{'sub': '2', '0 to 10% of ZrO,'}wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more.2. An ultraviolet transmitting glass contains , in mole percentage based on oxides ,{'sub': '2', '55 to 80% of SiO,'}{'sub': 2', '3, '12 to 27% of BO,'}{'sub': '2', '4 to 20% of RO in total, where R represents at least one kind of an alkali metal selected from a group consisting of Li, Na, and K,'}{'sub': 2', '3, '0 to 3.5% of AlO,'}0 to 5% of R′O in total, where R′ represents at least one kind of an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba,0 to 5% of ZnO, and{'sub': 2', '5, '0 to 5% of TaO,'}wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more.3. The ...

LOW-TEMPERATURE CO-FIRED CERAMIC MATERIAL AND PREPARATION METHOD THEREOF

A low-temperature co-fired ceramic material comprises the following components in percentage by weight: 35-50% of CaO, 5-15% of BO, 40-55% of SiO, 1-5% of nanometer AlO, 1-5% of MgO and 1-5% of nanometer ZrO. A preparation method comprises the following steps: ball milling and mixing according to the formula, sintering at a high temperature, quenching in deionized water, grinding, performing wet ball-milling, drying and grinding; and finally, granulating to prepare a green body, discharging glue, and sintering, to obtain a low-temperature co-fired ceramic material. According to the low-temperature co-fired ceramic material and the preparation method thereof provided in the present disclosure, the prepared low-temperature co-fired ceramic material has the advantages of low dielectric constant, low loss, good overall performance and the like. 1. A low-temperature co-fired ceramic material , comprising the following components in percentage by weight: 35-50% of CaO , 5-15% of BO , 40-55% of SiO , 1-5% of nanometer AlO , 1-5% of MgO and 1-5% of nanometer ZrO.2. A method for preparing a low-temperature co-fired ceramic material , comprising the following steps:{'sub': 3', '2', '3', '2', '2', '3', '2', '2', '3', '2', '2', '3', '2', '2', '3', '2', '2', '3', '2, 'S1: weighing the raw materials CaCO, BO, SiO, AlO, MgO, and ZrOin percentage by weight: 35-50% of CaO, 5-15% of BO, 40-55% of SiO, 1-5% of nanometer AlO, 1-5% of MgO and 1-5% of nanometer ZrO, to obtain chemically pure CaO, BO, SiO, nanometer AlO, MgO, nanometer ZrO, ball milling and mixing the mixed powder where the ball milling medium is zirconia balls, and sieving through a 60-mesh screen after the mixed powder is mixed uniformly;'}S2: sintering the sieved mixed powder obtained in Step S1 at a high temperature, and holding for a predetermined period of time, to melt and homogenize the mixed powder completely to obtain a melt;S3: quenching the melt in deionized water, to obtain a transparent broken glass body;S4: ...

GLASSES AND GLASS CERAMICS INCLUDING A METAL OXIDE CONCENTRATION GRADIENT

Embodiments of a glass-based article including a first surface and a second surface opposing the first surface defining a thickness (t) of about 3 millimeters or less (e.g., about 1 millimeter or less), and a stress profile, wherein all points of the stress profile between a thickness range from about 0·t up to 0.3·t and from greater than 0.7·t, comprise a tangent that is less than about −0.1 MPa/micrometers or greater than about 0.1 MPa/micrometers, are disclosed. In some embodiments, the glass-based article includes a non-zero metal oxide concentration that varies along at least a portion of the thickness (e.g., 0·t to about 0.3·t). In some embodiments, the concentration of metal oxide or alkali metal oxide decreases from the first surface to a point between the first surface and the second surface and increases from the point to the second surface. The concentration of the metal oxide may be about 0.05 mol % or greater or about 0.5 mol % or greater throughout the thickness. Methods for forming such glass-based articles are also disclosed. 1. A glass substrate comprising:{'sub': '2', 'from about 60 mol. % to about 70 mol. % SiO;'}from about 2 mol. % to about 4 mol. % MgO; and{'sub': '2', 'claim-text': [{'sub': 2', '2', '2', '2', '2', '2, 'a ratio of LiO to RO is greater than 0.5 and less than or equal to 1, wherein RO is the sum (mol. %) of LiO, KO, and NaO in the glass substrate; and'}, {'sub': '2', 'the glass substrate is substantially free of TiO.'}], 'from about 2 mol. % to about 10 mol. % LiO, wherein2. The glass substrate of further comprising from about 5 mol. % to about 28 mol. % AlO.3. The glass substrate of claim 1 , wherein AlOis present in an amount from about 5 mol. % to about 20 mol. %.4. The glass substrate of further comprising from about 0 mol. % to about 8 mol. % BO.5. The glass substrate of further comprising from about 0 mol. % to about 6 mol. % NaO.6. The glass substrate of further comprising from about 1 mol. % to about 2 mol. % CaO.7. The ...

DENTAL GLASS-CERAMICS BLOCK BONDED WITH ABUTMENT AND PREPARATION METHOD THEREOF

A method of bonding a high-strength zirconia post serving as a core in a glass-ceramic block, a method of bonding a metal link fastened with an implant fixture to the zirconia post, and glass-ceramic bondable to the zirconia post and a preparation method thereof, when preparing artificial teeth through a CAD/CAM processing method by using the glass-ceramic block as an artificial-teeth material. The lithium disilicate glass-ceramics containing cristobalite crystalline includes glass-ceramics composition including 10 to 15 wt % LiO, 68 to 76 wt % SiO, 2 to 5 wt % POworking as a nuclei formation agent, 0 to 5 wt % AlOto increase glass transition temperature and softening temperature and increase chemical durability of the glass, 2 to 3 wt % ZrO, 0.5 to 3 wt % CaO for enhancing a thermal expansion coefficient of the glass, 0.5 to 5 wt % NaO, 0.5 to 5 wt % KO, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and LaO. 1. A lithium silicate glass-ceramic , comprising:{'sub': 2', '2', '2', '5, 'b': 68', '76, 'a glass composition comprising 10 to 15 wt % lithium oxide (LiO),- wt % silicon dioxide (SiO), 2 to 5 wt % phosphorus pentoxide (PO) as'}{'sub': 2', '3', '2', '2', '2', '2', '3, '0 to 5 wt % aluminum oxide (AlO) as a, 2 to 3 wt % zirconium oxide (ZrO), 0.5 to 3 wt % calcium oxide (CaO), 0.5 to 5 wt % sodium oxide (NaO), 0.5 to 5 wt % potassium oxide (KO), and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of magnesium oxide (MgO), zinc oxide (ZnO), fluorine (F), and lanthanum oxide (LaO),'} the phosphorus pentoxide is a nuclei formation agent,', 'the aluminum oxide increases the glass transition temperature and the chemical durability of the glass composition, and', 'the calcium oxide enhances the thermal expansion coefficient of the glass composition., 'wherein2. The lithium silicate glass-ceramic of claim 1 , wherein the lithium silicate glass composition further comprises 0.5 to 5 wt % potassium oxide (KO) and 0.5 to 3 wt % calcium oxide (CaO). ...

WHITE, OPAQUE, ß-SPODUMENE GLASS-CERAMIC ARTICLES WITH TUNABLE COLOR AND METHODS FOR MAKING THE SAME

Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO; 10.5-18 AlO; 5-14 LiO; 2-12 BO; and 0.4-2 FeO. Additionally, these glasses and glass-ceramics can exhibit the following criteria: 1. A process for making a glass-ceramic comprising: [{'sub': '2', 'i) SiOin a range from about 62 to about 75,'}, {'sub': 2', '3, 'ii) AlOin a range from about 10 to about 18,'}], 'a) heating a crystallizable glass at a rate in a range from about 1° C./min to about 10° C./min to a nucleation temperature in a range from about 700° C. and 810° C., wherein, in mole %, the crystallizable glass comprises{'sub': '2', 'iii) LiO in a range from about 5 to about 14,'}{'sub': 2', '3, 'iv) BOin a range from about 2 to about 12, and'}{'sub': 2', '3', '2', '2', '2', '3', '2', '3', '2', '3', '2', '3', '2', '5, 'v) a metal oxide selected from group consisting of CoO, CrO, CuO, MnO, SbO, InO, BiO, NiO, VO, TaO, and combinations thereof in a range from about 0.01 to about 2, and'}b) maintaining the crystallizable glass at the nucleation temperature to produce a nucleated crystallizable glass;c) heating the nucleated crystallizable glass at a rate in a range from about 1° C./min to about 10° C./min to a crystallization temperature of in a range from about 850° C. to about 1200° C.; andd) maintaining the nucleated crystallizable glass at the crystallization temperature to produce a glass-ceramic having β-spodumene as a predominant crystalline phase.2. The process of claim 1 , wherein the glass-ceramic article comprises a color presented in CIELAB color space coordinates for an observer angle of 10° and a CIE illuminant F02 determined from reflectance spectra measurements using a spectrophotometer with specular reflectance included comprising:a) CIE a* in a range from about −0.5 to about 0.5;b) CIE b* in a range from ...

GLASS-CERAMIC ARTICLES WITH IMPROVED STRESS PROFILES

Glass-ceramic articles are manufactured by an ion exchange process that results in glass-based articles having improved stress profiles. A knee may be located at a depth of 3 microns or deeper. A compressive stress at a surface may be 200 MPa or more and at a knee may be 20 MPa or more. A non-sodium oxide may have a non-zero concentration that varies from the first surface to a depth and a depth of compression (DOC) may be located at 0.10·t, or even at 0.17·t or deeper. A two-step ion exchange (DIOX) includes, for example, a potassium bath in a first treatment to form a spike in a spike region of the stress profile, followed by a second treatment which includes, for example, a potassium and sodium mixed bath to maintain the spike and form a tail region of the stress profile. The glass-ceramic articles may thereby avoid developing a vitreous surface layer, which facilitates repeatable and reliable measurement of waveguide modes and determination of compressive stress in the surface (CS) and depth of the spike. 1. A glass-ceramic article comprising:a glass-ceramic substrate having opposing first and second surfaces defining a substrate thickness (t);a central composition at a center of the glass-ceramic article containing an alkali metal and a crystalline phase, wherein the crystalline phase is 20% or more by weight of the central composition; and one or more of:(a) a stress profile comprising: a knee that is at a depth of 3 micrometers or more;(b) a stress profile comprising: a first compressive stress at the first surface that is 200 MPa or more; and a second compressive stress at a knee that is 20 MPa or more; or(c) a non-sodium oxide having a non-zero concentration that varies from the first surface to a depth of layer of the non-sodium oxide; and a stress profile comprising a knee and a depth of compression (DOC) that is located at 0.10·t or deeper.2. The glass-ceramic article of claim 1 , wherein the alkali metal of the central composition is lithium.3. The ...

GLASS CERAMIC WORKTOP

An item of equipment includes at least one worktop formed of at least one substrate made of monolithic glass material with a surface area of greater than 0.7 m. The substrate exhibits a luminosity L* of greater than 10, a light transmission Tof less than 50%, and an opacity indicator of greater than 90. The item of equipment also includes at least one heating element and at least one interface for communication with at least one element of the worktop, such as the heating element(s), and/or with at least one external element for wireless communication. The item of equipment is devoid of light source(s). 1. An item of equipment , comprising:{'sup': '2', 'sub': 'L', 'at least one worktop formed of at least one substrate made of monolithic glass material with a surface area of greater than 0.7 m, said substrate exhibiting a luminosity L* of greater than 10, a light transmission Tof less than 50%, and an opacity indicator of greater than 90,'}at least one heating element,at least one interface for communication with at least one element of the worktop, and/or with at least one external element for wireless communication,said item of equipment additionally being devoid of light source(s).2. The item of equipment as claimed in claim 1 , wherein the surface area of the substrate made of glass material is greater than 0.9 m claim 1 , the thickness of said substrate is at least 2 mm claim 1 , and the thickness of the substrate is less than 15 mm.3. The item of equipment as claimed in claim 1 , wherein the substrate made of glass material occupies at least 50% of the surface area of the worktop.4. The item of equipment as claimed in claim 1 , wherein the substrate is made of tempered glass or of glass-ceramic.5. The item of equipment as claimed in claim 1 , wherein the substrate exhibits a flatness of less than 0.1% of the diagonal of the substrate.6. The item of equipment as claimed in claim 1 , wherein the substrate is opaque and/or is colored or tinted in its bulk claim 1 ...

SUBSTRATE FOR OLED, METHOD OF FABRICATING THE SAME AND ORGANIC LIGHT-EMITTING DEVICE HAVING THE SAME

A substrate for an organic light-emitting diode (OLED) which can improve the light extraction efficiency of the organic light-emitting device while securing transmittance, a method of fabricating the same, and an organic light-emitting device having the same. The substrate for an OLED is a substrate on which the OLED is to be deposited. The substrate is made of transparent crystallized glass in which a number of crystal grains are distributed. 1. A substrate on which an organic light-emitting diode is to be deposited , comprising transparent crystallized glass in which a number of crystal grains are distributed.2. The substrate of claim 1 , wherein a size of the crystal grains ranges from 0.01 to 3 μm.3. The substrate of claim 1 , wherein the transparent crystallized glass comprises an amorphous structure in a range from 10 to 25 volume percent.4. The substrate of claim 1 , wherein the transparent crystallized glass comprises lithium aluminosilicate glass.5. The substrate of claim 4 , wherein the crystal grains comprise a crystalline phase of one selected from the group consisting of cordierite claim 4 , silica claim 4 , eucryptite and spodumene.6. The substrate of claim 1 , wherein a surface roughness (R) of the substrate is 0.01 μm or less.7. The substrate of claim 1 , wherein a visible transmittance of the substrate is 50% or greater.8. A method of fabricating a substrate which comprises transparent crystallized glass claim 1 , and on which an organic light-emitting diode is to be deposited claim 1 , the method comprising heat-treating the transparent crystallized glass that contains a nucleation agent that promotes precipitation of crystal grains claim 1 , thereby controlling a size of the crystal grains that are to be precipitated.9. The method of claim 8 , wherein heat-treating the transparent crystallized glass comprises heat-treating the transparent crystallized glass at a temperature ranging from 850 to 1000° C. for 1 to 2 hours.10. The substrate of claim 8 ...

PROCESS FOR PREPARING A GLASS-CERAMIC BODY

Process for preparing glass-ceramic body including the steps of providing a basic glass body and subjecting the basic glass body to a thermal treatment whereby a crystalline phase embedded in a glass matrix is formed. The basic glass body is made of a composition comprising 65 to 72 wt-% SiO, at least 10.1 wt-% LiO and at least 10.1 wt-% AlObased on the total weight of the composition, the proportion of LiO to AlObeing from 1:1 to 1.5:1. The thermal treatment involves a nucleation step followed by several crystallization steps at different temperatures, whereby at least two different crystalline phases are formed. 1. Process for preparing a glass-ceramic body comprising the steps of providing a basic glass body and subjecting the basic glass body to a thermal treatment whereby a crystalline phase embedded in a glass matrix is formed ,wherein the basic glass body is made of a composition comprising 65 to 72 wt-% SiO2, at least 10.1 wt-% Li2O and at least 10.1 wt-% Al2O3 based on the total weight of the composition, the proportion of Li2O to Al2O3 being from 1:1 to 1.5:1, and the thermal treatment involves a nucleation step followed by a first crystallization step at a first temperature range and a second crystallization step at a second temperature range different from the first temperature range, wherein at least two different crystalline phases are formed.2. Process for preparing a glass-ceramic body according to claim 1 , wherein a first region of the glass body is subjected to the first crystallization step and a second region of the glass body different to the first region is subjected to the second crystallization step such that the proportion of the first crystalline phase is higher in the first region than in the second region and the proportion of the second crystalline phase is higher in the second region than in the first region.3. Process according to claim 2 , wherein the regions are heated to the respective temperature ranges by means of laser ...

COLOURED TRANSPARENT LITHIUM ALUMINIUM SILICATE GLASS-CERAMIC AND USE THEREOF

A description is given of a coloured, transparent, lithium aluminium silicate glass-ceramic and also of the use thereof, said glass-ceramic possessing a light transmission Y of 2.5% to 10% and a spectral transmission τof more than 1.0%. 1. Coloured , transparent , lithium aluminium silicate glass-ceramic ,characterized by{'sub': 2', '3', '2', '3, 'an AsOand/or SbOcontent of in total 0 to <1000 ppm,'}{'sub': 2', '5, 'a VOcontent of 55 ppm to 200 ppm,'}{'sub': 2', '3, 'an FeOcontent of 450 ppm to 1000 ppm, and'}{'sub': 2', '3', '2', '5, 'a ratio of FeO/VO(both in wt %) of 3-9,'}{'sub': 2', '3, 'wherein the lithium aluminium silicate glass-ceramic is free from CoO, NiO and CrO,'}and wherein the lithium aluminosilicate glass-ceramic has the following transmission qualities:Y(D65, 2°) 2.5−10%,{'sub': '(at 465 nm)', 'τ>1.0%, and'}{'sub': '(at 465 nm)', 'a difference (Y(D65, 2°)−τ) of ≤3%.'}2. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterized byY(D65, 2°)>2.5-10%,{'sub': '(at 465 nm)', 'τ>1.2%, and'}{'sub': '(at 465 nm)', 'a difference (Y(D65, 2°)−τ) of <3%.'}3. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterized by{'sub': '(630 nm)', 'τof 10.9%±3.8%.'}6. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterized{'sub': '2', 'in that the SnOcontent is 0.05-0.4 wt %.'}7. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterized by{'sub': 2', '3', '2', '5, 'a ratio of FeO/VO(both in wt %) of 5-7.'}8. Lithium aluminium silicate glass-ceramic according to claim 1 , characterized by{'sub': 2', '3, 'an FeOcontent of 700 ppm to 1000 ppm.'}9. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterized by{'sub': 2', '5, 'a VOcontent of 100 ppm to 200 ppm.'}10. Lithium aluminium silicate glass-ceramic according to claim 1 ,characterizedin that it comprises high-quartz mixed crystals as main crystal phase.11. Glass-ceramic plate comprising a glass-ceramic according to claim 1 , ...

Li2O-Al2O3-SiO2-BASED CRYSTALLIZED GLASS

Provided is a LiO—AlO—SiO-based crystallized glass that has a high permeability to light in an ultraviolet to infrared range and is less susceptible to breakage. A LiO—AlO—SiO-based crystallized glass contains, in terms of % by mass, 40 to 90% SiO, 1 to 10% LiO, 5 to 30% AlO, 0 to 20% SnO, over 0 to 20% ZrO, 0 to below 2% TiO, 0 to 10% MgO, and 0 to 10% POand includes a β-spodumene solid solution precipitated as a main crystalline phase. 1: A LiO—AlO—SiO-based crystallized glass containing , in terms of % by mass , 40 to 90% SiO , 1 to 10% LiO , 5 to 30% AlO , 0 to 20% SnO , over 0 to 20% ZrO , 0 to below 2% TiO , 0 to 10% MgO , and 0 to 10% POand including a β-spodumene solid solution precipitated as a main crystalline phase.2: The LiO—AlO—SiO-based crystallized glass according to claim 1 , further containing claim 1 , in terms of % by mass claim 1 , 0 to 10% NaO claim 1 , 0 to 10% KO claim 1 , 0 to 10% CaO claim 1 , 0 to 10% SrO claim 1 , 0 to 10% BaO claim 1 , 0 to 10% ZnO claim 1 , and 0 to 10% BO.3: The LiO—AlO—SiO-based crystallized glass according to claim 1 , containing claim 1 , in terms of % by mass claim 1 , 0 to 2% SnO.4: The LiO—AlO—SiO-based crystallized glass according to claim 1 , containing claim 1 , in terms of % by mass claim 1 , 1.5 to 20% ZrOand over 0 to 10% MgO.5: The LiO—AlO—SiO-based crystallized glass according to claim 1 , further containing claim 1 , in terms of % by mass claim 1 , 0.10% or less FeO.6: The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of MgO/(LiO+MgO) is 0.0001 or more.7: The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of AlO/(SnO+ZrO) is 9 or less.8: The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of SnO/(SnO+ZrO+TiO+PO+BO) is 0.01 or more.9: The LiO—AlO—SiO-based crystallized glass according to claim 1 , wherein a mass ratio of ZrO/LiO is 0.4 or more.10: The LiO—AlO—SiO-based crystallized glass according to claim ...

METHOD FOR ENGINEERED MESOPOROUS CELLULAR MAGMATICS AND ARTICLES THEREOF

Methods for engineered mesoporous cellular magmatics and articles thereof are disclosed. For example, the magmatics may include one or more infiltration materials that are configured not to sinter when a foamed mass is formed. The infiltration materials may be enclosed in cells of the foamed mass and may be floating and/or fixed to the cell walls. 1. An article of manufacture , comprising: a non-crystalline portion disposed such that the non-crystalline portion; and', 'a crystalline portion that is bound to the non-crystalline portion, in line with the definition of glass ceramics; and, 'a rigid foam mass being composed of at least one silicate based component and havinga vitreous material disposed within and enclosed by pores of at least a portion of at least one of the non-crystalline portion or the crystalline portion, the vitreous material having a melting temperature higher than the at least one silicate based component.2. The article of manufacture of claim 1 , wherein the vitreous material is a reactive material configured to cause a chemical reaction with a substance when the substance contacts the reactive material.3. The article of manufacture of claim 1 , wherein the vitreous material is a non-reactive material configured to avoid a chemical reaction with a substance when the substance contacts the non-reactive material but where the substance is involved in the chemical reaction with at least a portion of at least one of the non-crystalline portion or the crystalline portion.4. The article of manufacture of claim 1 , wherein the vitreous material includes a surface chemistry configured to resist incorporation of the vitreous material into a wall of the pores.5. An article of manufacture claim 1 , comprising: at least one of an amorphous portion or a crystalline portion bound to the amorphous portion; and', 'a vitreous material disposed within pores of at least a portion of the at least one of the amorphous portion or the crystalline portion, the vitreous ...

TRANSLUCENT NANOCRYSTALLINE GLASS CERAMIC

The present invention provides a material composition and a process of producing translucent ZrO—SiOnanocrystalline glass ceramic (NCGC) with ultra-high flexural strength. The method comprises the following step: (1) prepare homogenous ZrO2-SiO2 nano-sized powder with high purity via a sol-gel method; (2) pressure assisted sintering of ZrO2-SiO2 nano-sized sol-gel powder to obtain translucent ZrO2-SiO2 NCGC. The invention also includes materials manufactured using the method. 1. A method for manufacturing translucent ZrO—SiOnanocrystalline glass ceramic , comprising the steps of:Providing a first solution by mixing a first precursor comprising silicon (IV), a solvent and an acidic aqueous solution, whereby the first precursor is hydrolyzed;Providing a second solution by mixing a second precursor comprising zirconium (IV) and a solvent;Combining the first and second solutions, wherein the molar ratio between Zr and Si in said solution ranges from 20:80 to 90: 10, preferably 60:40 to 80:20;Hydrolyzing and polymerizing the combined solution addition of an acidic aqueous solution to form a colloidal solution (or sol);Ageing the sol to form a clear sol;Polymerizing the clear sol by addition of an acidic aqueous solution;Ageing the clear sol to form a gel;Drying the gel to form a xerogel;Micronising of the xerogel to form a powder, and optionally including particle size selection;Calcining the powder, optionally with pre-compaction or compaction during the calcination process; andSintering the calcined powder, optionally with pre-compaction or compaction during the calcination process.2. The method according to claim 1 , wherein said first precursor is selected from the group consisting of tetraethyl orthosilicate claim 1 , ethyl silicate claim 1 , and silicon alkoxides.3. The method according to claim 1 , wherein said second precursor is selected from the group consisting of zirconium alkoxide claim 1 , such as zirconium(IV) propoxide or Zr(OPr) claim 1 , zirconyl ...

COLORED AND OPAQUE GLASS CERAMIC(S), ASSOCIATED COLORABLE AND CERAMABLE GLASS(ES), AND ASSOCIATED PROCESS(ES)

Disclosed herein are glass-ceramics having crystalline phases including β-spodumene ss and either (i) pseudobrookite or (ii) vanadium or vanadium containing compounds so as to be colored and opaque glass-ceramics having coordinates, determined from total reflectance—specular included—measurements, in the CIELAB color space of the following ranges: L*=from about 20 to about 45; a*=from about −2 to about +2; and b*=from about −12 to about +1. Such CIELAB color space coordinates can be substantially uniform throughout the glass-ceramics. In each of the proceeding, β-quartz ss can be substantially absent from the crystalline phases. If present, β-quartz ss can be less than about 20 wt % or, alternatively, less than about 15 wt % of the crystalline phases. Also Further crystalline phases might include spinel ss (e.g., hercynite and/or gahnite-hercynite ss), rutile, magnesium zinc phosphate, or spinel ss (e.g., hercynite and/or gahnite-hercynite ss) and rutile. 115-. (canceled)16. A method of making a colorable and ceramable glass composition , comprising melting preselected amounts of ingredients having preselected compositions meltable to the colorable and ceramable glass , wherein the preselected compositions of the ingredients for the one or more colorants comprise any one of:{'sup': 2+', '3+', '2+', '3+, 'k. one or more compounds of iron comprising one or more Fe sources, one or more Fe sources, or one or more Fe sources and one or more Fe sources;'}l. one or more compounds of iron and one or more compounds of one or more additional transition metals, wherein the one or more additional transition metals comprises Co, Ni, Mn, Cr, Cu, or combinations thereof; i. the one or more multivalent metals comprise Bi, V, Sn, Ti, or combinations thereof; and', 'ii. the one or more compounds capable of reducing the one or more compounds including one of more components capable of reducing a valence or valences of at least a portion the one or more multivalent metals comprise ...

METHOD OF MAKING POROUS MONO CORDIERTIE GLASS CERAMIC MATERIAL AND ITS USE

A sintered porous cordierite-based glass-ceramic material is made using mainly three natural starting materials which are silica′ sand, kaolin clay and magnesite in addition to little boric acid is described. Upon melting at 1400-1450° C., this combination of raw materials and boric acid forms transparent brown glass which after solidification by quenching is then crushed and reduced to powder having a median particle size diameter less than 65 microns. This brown glass powder is consolidated, for example by compaction, to form a green body for sintering. Sintering of the green body at temperatures between about 1000° C. and 1300° C. in the period from 1 min to 60 min to produce porous cordierite glass-ceramic material containing a 56% porosity. The said material have density, microhardness and CTE suitable for use in various technical fields such as light insulation refractor material and in filter for vehicle exhaust. 1. A method of preparing a porous mono-cordierite glass-ceramic material , comprising:a) mixing and homogenizing a natural raw material, a mixture of oxide and a commercial material, wherein the natural raw material is a silica sand, kaolin and magnesite and the commercial material is a boric acid;b) Melting the homogenized the natural raw materials with boric acid at a temperature of from about 1400° C. to 1450° C. to form a glass frit material;c) crushing the frit glass material that is quenched to form a crushed glass powder having a particle size diameter of no greater than about 65 microns;d) consolidating the crushed glass powder into a green body;e) sintering the green body at a temperature of from about 1000° C. to 1300° C. for a specific time to devitrify and form a porous polycrystalline material; andf) cooling porous polycrystalline material to form a cordierite polycrystalline material.2. The method according to wherein said mixture of oxides has 0.50 wt % to 01.50 wt % of CaO; 0.01 wt % to 0.20 wt % of NaO claim 1 , 0.01 wt % to 0.20 wt ...

GLASS PLATE

A glass plate, with a thickness θ of 1.0 mm or more, having first and second main surfaces and end surfaces, includes 1 to 80 weight ppm of iron in terms of FeOwith 0.1 to 10.0 weight ppm of Fe; and 0.1 to 10.0 weight ppm of Ni, Mn, Cr, Co and V in total. In a sample with a size of 50 mm×50 mm×8 obtained from the glass plate, and an arithmetic average roughness of the main surfaces and first and second cut surfaces being 0.1 μm or less, a first average absorbance coefficient for a wavelength of 400 to 700 nm measured on the first main surface in a normal direction is 0.009 or less, and a ratio of a second average absorbance coefficient measured on the first cut surface, to the first absorbance coefficient is 1.3 or less. 1. A glass plate , having a length of a side L of 200 mm or more and a thickness θ of 1.0 mm or more , provided with first and second main surfaces; and one end surface or a plurality of end surfaces connecting the main surfaces to each other , the glass plate comprising:{'sub': 2', '3', '2', '3, 'sup': '2+', '1 weight ppm to 80 weight ppm of iron in a total amount in terms of FeO, with 0.1 weight ppm to 10.0 weight ppm of Fe in terms of FeO; and'}0.1 weight ppm to 10.0 weight ppm of Ni, Mn, Cr, Co and V in total,wherein, in a sample “A”, obtained by cutting from a central portion of the glass plate in a direction orthogonal to the first main surface, with a size having a length of 50 mm, a width of 50 mm and a thickness of θ, the two main surfaces and first and second cut surfaces that face each other being set to have an arithmetic average roughness Ra of 0.1 μm or less,{'sub': 'ave1', 'a first average absorbance coefficient, α, for a wavelength within a range of 400 nm to 700 nm measured on the first main surface in a normal direction to the first main surface is 0.009 or less, and'}{'sub': ave2', 'ave1', 'ave2', 'ave1, 'a ratio of a second average absorbance coefficient, α, for a wavelength within a range of 400 nm to 700 nm measured on the ...

SHEET OF FLOAT GLASS HAVING HIGH ENERGY TRANSMISSION

The invention relates to a sheet of extra-clear glass, that is to say a sheet of glass having high energy transmission, which can be used in particular in the field of solar energy. More specifically, the invention relates to a sheet of float glass having a composition which comprises, in a content expressed as percentages of the total weight of glass: SiO60-75%; AlO: 0-10%; BO: 0-5%; CaO: 0-15%; MgO: 0-10%; NaO: 5-20%; KO: 0-10%; BaO: 0-5%; total iron (expressed as FeO): 0.001 to 0.06%; antimony (expressed as SbO): 0.02 to 0.07%. 2. The sheet of claim 1 , wherein the composition has a content expressed in percentage by total weight of glass of from 0.03 to 0.06% by weight of antimony (expressed as SbO).3. The sheet of claim 1 , wherein the composition has a content expressed in percentages by total weight of glass of from 0.001 to 0.02% by weight of total iron (expressed as FeO).4. The sheet of claim 1 , wherein the composition has a redox of from 0.01 to 0.4.5. The sheet of claim 1 , wherein the composition has a redox of from 0.1 to 0.3.6. The sheet of claim 1 , wherein the composition is free from cerium.7. The sheet of claim 1 , wherein the composition is free from arsenic.8. The sheet of claim 1 , it wherein the sheet has an energy transmission measured for a thickness of 4 mm (ET4) of at least 89%.9. The sheet of claim 1 , it wherein the sheet has an energy transmission measured for a thickness of 4 mm (ET4) of at least 90%.10. The sheet of claim 1 , wherein the sheet has an energy transmission measured for a thickness of 4 mm (ET4) of at least 91%.11. The sheet of claim 1 , wherein the sheet is coated with a thin transparent and electrically conductive layer.12. The sheet of claim 1 , wherein the sheet is coated with an antifouling layer.13. The sheet of claim 1 , wherein the sheet is coated with an antireflective layer.14. The sheet of claim 1 , wherein the sheet is coated with a mirror layer.15. A solar photovoltaic module or mirror claim 1 , comprising ...

Electronic device with a cover assembly having an adhesion layer

A cover assembly for an electronic device has a cover member including a glass ceramic material. An adhesion layer couples an interior coating to the cover member. The adhesion layer includes an oxide-based layer, such as a silicon oxide-based layer, and a coupling agent.

Process for producing a highly transparent impact-resistant glass ceramic

The process for producing a transparent lithium aluminosilicate glass ceramic plate includes ceramicizing a green glass body of the LiO—AlO—SiOsystem using a ceramization program, which includes heating it, for the purpose of nucleation, to a temperature of 750° C.±20° C. and maintaining the temperature for 20±15 minutes, further heating the green glass body, for the purpose of ceramization, to a temperature of 900±20° C. and maintaining the to temperature for 20±15 minutes and then cooling to room temperature. The transparent plate has a thermal expansion coefficient (CTE) from −0.15×10/K to +0.15×10/K at 30 to 700° C. and a brightness value observed at an angle of 2° of ≧80 for a -mm thick plate for transmitted normal light. 2. The process according to claim 1 , wherein said transparent plate has a thermal expansion coefficient (CTE) from −0.15×10/K to +0.15×10/K at 30 to 700° C.3. The process according to claim 2 , wherein said thermal expansion coefficient (CTE) is from −0.05×10/K to −0.10×10/K at 30 to 700° C.4. The process according to claim 1 , where said composition comprises from 40 to 130 ppm of said FeO.6. The process according to claim 1 , wherein the transparent plate has a brightness value for transmitted normal light observed at an angle of 2° of ≧80 for a plate thickness of 4 mm. This is a divisional of U.S. patent application Ser. No. 12/616,982, filed on Nov. 12, 2009, which claims priority of invention based on German Patent Application 10 2008 043 718.2 filed on Nov. 13, 2008 in Germany. The aforesaid German Patent Application contains subject matter described and claimed herein below.The inventions described herein comprise a transparent plate made of lithium aluminosilicate glass ceramic having a high transmission, a process for making same and also transparent plate laminates comprising at least one of the plates of the lithium aluminosilicate glass ceramic according to the invention and the use thereof as armored glass or in bullet-proof ...