ОБЛАДАЮЩИЕ ПОКРЫТИЕМ АБРАЗИВНЫЕ МАТЕРИАЛЫ И СПОСОБ ИХ ИЗГОТОВЛЕНИЯ

Изобретение может быть использовано при изготовлении абразивных инструментов. Используют множество сверхтвердых абразивных частиц субмикрометрового или нанометрового размера алмаза или кубического нитрида бора или комбинации этих материалов и обладающие витреофильными поверхностями, способными образовывать химические связи с оксидами. Наносят на частицы покрытия из оксидного материала-предшественника и затем термически обрабатывают для высушивания и очистки покрытий. Покрытия выбраны из группы, включающей нитриды титана, ванадия, ниобия, тантала, молибдена и вольфрама или карбиды ванадия, ниобия, тантала, молибдена и вольфрама, фазу анатаза диоксида титана, фазу рутила диоксида титана, тетрагональный диоксид циркония, моноклинный диоксид циркония, диоксид циркония, стабилизированный оксидом иттрия или оксидом магния, переходные структуры или альфа-фазу оксида алюминия и оксиды ванадия, ниобия, тантала, гафния, молибдена и вольфрама, кварцевое стекло. Изобретение позволяет наносить покрытия ...

СПЛАВЛЕННОЕ ЗЕРНО ИЗ ОКСИДА АЛЮМИНИЯ, ОКСИДА ТИТАНА И ДИОКСИДА ЦИРКОНИЯ

Изобретение относится к металлургии, в частности к изготовлению шиберных затворов из сплавленных зерен, содержащих оксид алюминия, оксид титана и оксид циркония, которые используются в литейных ковшах при непрерывной выплавке стали. Сплавленное зерно из оксида алюминия, оксида титана и диоксида циркония, содержащее, мас.%: Аl2О3 более чем 10 и менее чем 50; ТiO2 более чем 10 и менее чем 40; ZrO2 более чем 50 и примеси менее чем 2. Зерно не содержит фазу ТiO2 и необязательно фазу диоксида циркония, где более чем 98 мас.% диоксида циркония является моноклинным. Зерно получено путем смешивания сырья, сплавления с получением расплавленной жидкости, охлаждения расплавленной жидкости так, что жидкость полностью затвердевает в течение менее чем 3 минут с получением твердой массы и, при необходимости, измельчения твердой массы с получением смеси зерен. Затвор выполнен из спеченного композиционного материала, содержащего сплавленное зерно и матрицу из оксида алюминия/диоксида циркония. Изготовленный ...

ВОЛОКНИСТАЯ ЗАГОТОВКА ДЛЯ ПОЛОЙ ЛОПАТКИ ГАЗОТУРБИННОГО ДВИГАТЕЛЯ

Изобретение относится к волокнистой заготовке для полой лопатки газотурбинного двигателя, к такой полой лопатке и способу изготовления такой полой лопатки. Изобретение также относится к газотурбинному двигателю и летательному аппарату, содержащим такую полую лопатку. Волокнистая заготовка для полой лопатки турбины газотурбинного двигателя включает в себя основную волокнистую структуру, полученную трехмерным тканьем и содержащую по меньшей мере одну основную часть, причем основная часть проходит от первой соединительной полосы, содержит первую основную продольную часть, подходящую для формирования, по существу, стенки стороны нагнетания аэродинамического профиля, затем часть поворота на 180°, подходящую для формирования, по существу, передней кромки или задней кромки аэродинамического профиля, затем вторую основную продольную часть, обращенную напротив первой основной продольной части и подходящую для формирования, по существу, стенки стороны всасывания аэродинамического профиля, и заканчивается ...

Керамическая масса для изготовления фильтров

Изобретение относится к области керамического и огнеупорного производства, в частности изготовления керамических фильтров для очистки высокотемпературных и агрессивных жидких и газообразных материалов. Керамическая масса состоит из порошка шамота 35-52 мас.%, карбида кремния или электрокорунда 12,5-15 мас.%, смеси огнеупорной глины и полевого шпата в соотношении 3:7 32,5-45 мас.%, в том числе в виде водного шликера, и порошка декстрина 3-5 мас.%. Предлагаемым изобретением обеспечивается повышение механической прочности фильтров, их стойкости к агрессивным средам при сохранении заданной пористости и проницаемости. 1 табл., 3 пр.

БОКОВОЙ БЛОК ДЛЯ СТЕНКИ ЭЛЕКТРОЛИЗЕРА ДЛЯ ВОССТАНОВЛЕНИЯ АЛЮМИНИЯ

Изобретение относится к боковому блоку для стенки в электролизере, в частности, для получения алюминия, к способу изготовления такого бокового блока, и к применению такого бокового блока, а также к электролизеру с таким боковым блоком. Боковой блок представляет собой слоистый элемент, включающий слой с более высокой теплопроводностью и слой с более низкой теплопроводностью, причем разность в теплопроводности составляет по меньшей мере 5 Вт/(м⋅К) при температуре между 920°С и 1000°С, при этом по меньшей мере один из слоем легирован кремнием в виде порошка, оксидным керамическим материалом или неоксидным материалом. Раскрыты также способ изготовления такого бокового блока, применение бокового блока для футеровки боковых стенок электролизера для получения алюминия и электролизер для получения алюминия с боковой стенкой с таким боковым блоком. Обеспечивается создание оптимальных технологических условий достижение высокой экономичности и стабильности во время проведения электролиза, повышение ...

ХИМИЧЕСКИ СВЯЗАННЫЙ КЕРАМИЧЕСКИЙ РАДИАЦИОННО-ЗАЩИТНЫЙ МАТЕРИАЛ И СПОСОБ ЕГО ПОДГОТОВКИ

Группа изобретений относится к области химически связанных керамик на основе оксида-фосфата, в частности к химически связанным керамикам на основе оксида-фосфата, имеющим уникальные характеристики радиационной защиты. Состав вещества для удержания радиации и защиты от нее, содержащий химически связанную керамическую матрицу на основе оксида-фосфата и радиационно-защитный материал, в котором радиационно-защитный материал диспергирован в матрице химически связанного керамического цемента на основе оксида-фосфата, и радиационно-защитный материал выбран из группы, состоящей из барита, оксида бария, сульфата бария, оксида церия, оксида вольфрама, оксида гадолиния, оксида обедненного урана, отожженного свинцового стекла в виде порошка и волокон с содержанием свинца от 40% до 75%, цеолитов, клиноптилолитов и целестинов. Радиационно-защитный состав вещества, содержащий химически связанную керамическую матрицу на основе оксида-фосфата, имеющую катионную составляющую, демонстрирующую способность ...

ТЕПЛОИЗОЛЯЦИОННОЕ ИЗДЕЛИЕ

Теплоизоляционное изделие представляет собой стойкий к высоким температурам мат или плиту из неорганического волокна, пропитанный коллоидным неорганическим оксидом, прессованный и высушенный. Коллоидный неорганический оксид представляет собой композицию коллоидного неорганического оксида в комбинации с гелирующим агентом, при этом композиция коллоидного неорганического оксида включает коллоидный кремнезем, гелирующий агент в количестве примерно от 0,01 до 10 мас.% неорганических соли или оксида и примерно от 0,01 до 10 мас.% кислоты, а также воду в количестве, достаточном для растворения гелирующего агента, при необходимости в количестве, составляющем вплоть до примерно 70 мас.% от композиции. Изделие имеет рабочую температуру по меньшей мере до примерно 1000°С и сохраняет механическую целостность после воздействия рабочей температуры, имеет плотность больше 700 кг/сми прочность на сжатие по меньшей мере примерно 6800 кПа (70 кгс/см). Технический результат: снижение теплопроводности при ...

КОМПОЗИТНЫЙ ОГНЕУПОРНЫЙ МАТЕРИАЛ ДЛЯ ВНУТРЕННЕЙ ФУТЕРОВКИ ДОМЕННОЙ ПЕЧИ

Изобретение относится к области металлургии, в частности к огнеупорному материалу для внутренней футеровки доменной печи. Огнеупорный материал представляет собой многослойный композитный материал, содержащий по меньшей мере износостойкий защитный слой и теплопроводящий слой или износостойкий защитный слой, теплопроводящий слой и по меньшей мере один промежуточный слой, при этом прочность межслойного соединения между индивидуальными соседними слоями составляет более чем 6 МПа. Использование изобретения обеспечивает продолжительный срок службы огнеупорного материала и улучшает его механические и термические свойства. 4 н. и 26 з.п. ф-лы, 3 ил., 4 пр.

СПОСОБ ПОЛУЧЕНИЯ ОГНЕУПОРНОГО МАТЕРИАЛА ДЛЯ ПРИМЕНЕНИЯ В ВЕРХНЕМ СТРОЕНИИ ВАННЫХ СТЕКЛОВАРЕННЫХ ПЕЧЕЙ, А ТАКЖЕ СПОСОБ ПОВЫШЕНИЯ СПЕКТРАЛЬНОГО КОЭФФИЦИЕНТА ИЗЛУЧЕНИЯ У ФОРМОВАННЫХ ОГНЕУПОРНЫХ ИЗДЕЛИЙ

Изобретение относится к получению динасового огнеупорного материала для применения в верхнем строении ванных стекловаренных печей. В соответствии с заявленным способом содержащее карбид кремния зернистое вещество смешивают с по крайней мере одним зернистым кремнезёмистым сырьём и связкой или смесью связок с получением формовочной массы, из которой прессуют кирпичи, которые затем сушат и обжигают при температуре выше 1200°С. Содержащее карбид кремния зернистое вещество в спектральной области от 1 до 5 мкм и при температурах свыше 1000°C обладает спектральным коэффициентом излучения выше спектрального коэффициента излучения матрицы огнеупорного материала. Полученный огнеупорный материал содержит по меньшей мере 78 мас.% диоксида кремния и 0,2-20 мас. % SiC. Технический результат изобретения – повышение излучательной способности динасовых огнеупоров. 2 н. и 13 з.п. ф-лы, 6 пр., 2 ил., 1 табл.

ЭРОЗИОННОСТОЙКИЙ КЕРАМИЧЕСКИЙ МАТЕРИАЛ, ПОРОШОК, ШЛИКЕР И КОНСТРУКЦИОННЫЙ ЭЛЕМЕНТ

Изобретение относится к эрозионностойкому керамическому материалу и может быть использовано в составе керамического теплозащитного экрана камеры сгорания. Керамический порошок содержит 96-99,9 мас.% оксида алюминия разных гранулометрических фракций и 0,1-4 мас.% активного оксида магния, образующего в процессе обжига шпинельную фазу. В качестве оксида алюминия используют пластинчатый глинозем. Порошок не содержит соединений кремния. Технический результат изобретения - повышение коррозионной и эрозионной стойкости и термостойкости керамики. 4 н. и 12 з.п. ф-лы.

ДЕТАЛЬ ИЗ КОМПОЗИЦИОННОГО МАТЕРИАЛА ОКСИД/ОКСИД С ТРЕХМЕРНЫМ УСИЛЕНИЕМ И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ

Изобретение относится к детали из композиционного материала оксид/оксид, которая содержит волокнистое усиление, образованное множеством слоев нитей основы и слоев нитей утка, связанных между собой посредством трехмерного тканья, при этом пространства между нитями усиления заполнены матрицей из жаропрочного оксида. Деталь отличается тем, что волокнистое усиление имеет переплетение тканья, выбранное среди следующих переплетений: интерлок, множественное полотняное, множественное сатиновое и множественное саржевое, и плотность переплетения по основе и по утку, составляющую от 4 до 20 нитей/см. Объемное содержание волокон в волокнистом усилении составляет от 40 до 51%. После формирования матрицы внутри структуры блоки матрицы имеют размеры, меньшие пятикратного максимального сучения нитей, что позволяет предупредить появление трещин в конечном материале детали. 2 н. и 5 з.п. ф-лы, 10 ил., 1 табл.

ПРОДУКТ ИЗ ОКСИДА ХРОМА

Изобретение относится к огнеупорному продукту, применяемому в качестве внутренней облицовки газификатора. Спеченный огнеупорный продукт состоит из заполнителя, связанного матриксом, и содержит оксиды в процентном соотношении по массе: более 65 CrO, менее 35 AlO, 1 или более ZrO, по меньшей мере 20 масс. % которого стабилизировано в кубической и/или тетрагональной форме, 0,1 или более YO, действующего в качестве стабилизатора оксида циркония ZrO, менее 1,9% HfO, причем общее содержание оксида хрома, оксида алюминия и оксида циркония CrO+AlO+ZrOсоставляет более 90 масс. %. Продукт содержит соактиватор, действующий или не действующий в качестве стабилизатора оксида циркония, выбранный из СаО, MgO, TiOи их смесей, причем суммарное содержание оксида кальция, оксида магния и оксида титана СаО+MgO+TiOсоставляет менее 6,0 масс. % и более 0,5 масс. %, и более 50 масс. % оксида иттрия и соактиватора присутствуют в матриксе. Технический результат изобретения – улучшение устойчивости огнеупоров к шлаковой ...

ТЕРМОНАПЫЛЯЕМЫЙ ПОРОШОК И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Изобретение может быть использовано в производстве порошков из диоксида хрома для термически напыляемых износостойких покрытий. Термонапыляемый порошок содержит от 45 до 99% (вес.) диоксида хрома и от 1 до 55% (вес.) альфа оксида алюминия, и меньше, чем 50 частей на миллион щелочных и щелочно-земельных металлов, стабилизирующих хром в шестивалентном состоянии. Частицы порошка имеют главным образом однофазную кристаллическую структуру с содержанием оксида алюминия в других фазах, кроме альфа фазы, не выше 10% (вес.) от полного содержания оксида алюминия. Способ получения термонапыляемого порошка включает перемешивание порошка оксида алюминия, содержащего примеси щелочных и щелочно-земельных металлов не более 120 частей на миллион каждого элемента, с порошком диоксида хрома, который также имеет меньше, чем 120 частей на миллион примесей щелочных и щелочно-земельных металлов, стабилизирующих хром в шестивалентном состоянии, обжиг смеси при температуре 1300-1500°С. Изобретение позволяет снизить ...

Шихта для изготовления огнеупорного материала

Изобретение относится к производству огнеупорных материалов, используемых для изготовления изделий, работающих в условиях ударных и вибрационных нагрузок. Технический результат заключается в повышении прочности изделий. Шихта для изготовления огнеупорного материала включает, мас. %: оксид алюминия 55,0-59,0; муллит 15,0-20,0; нитрид бора 15,0-18,0; каолин 8,0-10,0. 1 табл.

СФЕРИЧЕСКИЕ ЗЕРНА КОРУНДА НА ОСНОВЕ ПЛАВЛЕНОГО ОКСИДА АЛЮМИНИЯ, А ТАКЖЕ СПОСОБ ИХ ПОЛУЧЕНИЯ

Изобретения относятся к области химии и могут быть использованы при получении корунда на основе плавленого оксида алюминия. Корунд имеет сферические зерна с диаметром зерен от 0,001 до 5 мм, максимальное содержание оксида натрия 0,5 вес.%, максимальное содержание оксида титана 0,5 вес.%, насыпной вес от 1,5 кг/л до 2,5 кг/л и удельную поверхность по БЭТ от 0,005 до 0,05 м2/г. Корунд имеет прочность зерен на разрыв ≥20 н, предпочтительно ≥40 н. Корунд получают путем расплавления глинозема с добавкой от 0,1 до 1% кварцевого песка в электродуговой печи в окислительных условиях, расплав разливают со скоростью разлива менее 100 кг/мин и плавленую струю разбивают сжатым воздухом при давлении от 3 до 10 бар. Изобретения позволяют получить корунд с плотными компактными зернами. 2 н. и 4 з.п. ф-лы, 2 ил., 2 табл.

СПОСОБ ПОЛУЧЕНИЯ ВОЛОКОН СМЕШАННОГО ШПИНЕЛЬНО-ГРАНАТОВОГО СОСТАВА

Изобретение относится к способам получения волокон смешанного оксидного состава MgAl2O4/Y3Al5O12 для создания высокотемпературных керамокомпозитов с улучшенными механическими свойствами. Способ заключается в расплавном формовании полимерных волокон при 80-180°С из волокнообразующих органомагнийоксаниттрийоксаналюмоксанов с мольным отношением Al/Y 5,8-6,0 и Al/Mg 2,4-2,5 с дальнейшей ступенчатой термообработкой в атмосфере воздуха при 500 и 1500°С, при которой образуются керамические волокна смешанного оксидного состава: MgAl2O4 и Y3Al5O12. 1 пр., 7 ил.

Способ изготовления керамического защитного элемента системы гамма-каротажа роторных управляемых систем (варианты)

Изобретение относится к производству керамических изделий на основе оксида алюминия, в частности защитного элемента системы гамма-каротажа роторных управляемых систем. Способ включает: мокрый помол оксидов алюминия, кремния, магния и кальция, взятых в массовом соотношении 95:3,5:1,3:0,2, сушку и спекание по заданному режиму нагрева. Спек измельчают с добавлением ПАВ - олеиновой кислоты в количестве 1-1,5 масс.% от массы спека; формуют изделия горячим литьем под давлением термопластичной керамической суспензии, приготовленной из измельченного спека с добавлением парафина в количестве 13-14 масс.% от массы спека с ПАВ. Термообработку изделий проводят в воздушной атмосфере печи в две стадии: на первой стадии осуществляют отжиг путем ступенчатого нагрева: до температуры 180±5°С, 300±5°С, 1200±5°С, выдержку в течение часа при каждой указанной температуре; на второй стадии осуществляют спекание изделия при температуре 1700±5°С со скоростью нагрева 5°С/мин, выдержку в течение 2 часов. При добавлении ...

Вакуумплотный слабопроводящий керамический материал и способ его получения

Изобретение относится к области керамического материаловедения и может быть использовано в производстве слабопроводящего вакуумплотного керамического материала для применения в электронной технике в качестве элемента вакуумной системы для снятия статического заряда, а также в качестве составляющей структурной керамики. Вакуумплотный слабопроводящий керамический материал на основе оксида алюминия дополнительно содержит BaO, Fe2O3, Li2О при следующем соотношении компонентов, мас. %: Al2O3 61,7; BaO 18,5; Fe2O3 19,4; Li2О 0,4. Способ получения вакуумплотного слабопроводящего керамического материала, состоит в том, что из вышеуказанного состава готовят порошковую композицию, осуществляют механоактивацию состава в центробежной планетарной мельнице, получают формовочную смесь путём смешивания порошковой композиции с дистиллированной водой, влажность формовочной смеси доводят до 9 %, формуют заготовки методом полусухого прессования при давлении 200 МПа, высушивают при температуре 200 °С до остаточной ...

СПОСОБ ПОЛУЧЕНИЯ САМОНЕСУЩЕГО КЕРАМИЧЕСКОГО ТЕЛА

Изобретение касается способа изготовления композиционных изделий сложной формы. Для этого заготовку исходного металла размещают в слое дисперсного инертного огнеупорного материала или в контакте с брикетом, сформованным из этого материала, и нагревают в газообразной среде, реакционноспособной по отношению к металлу заготовки. Нагрев ведут до температуры, большей точки плавления металла заготовки, но меньшей точки плавления продукта взаимодействия металла с газообразной средой, в течение времени, достаточного для взаимодействия металла со средой и его миграции через последовательно образующиеся слои в сторону среды. При этом, по меньшей мере, на часть поверхности металла наносят барьерное средство из материала, проницаемого для газообразной среды, но непроницаемого для металла или продукта его взаимодействия со средой. Барьерное средство можно размещать на заданном расстоянии от заготовки и/или частично заполнять им пространство между заготовкой и слоем (или брикетом) инертного огнеупорного ...

Способ формования заготовок огнеупорных керамических изделий

Изобретение относится к керамической промышленности и может быть использовано при изготовлении огнеупорных керамических изделий. Технический результат заключается в повышении качества поверхности заготовок огнеупорных керамических изделий, равноплотности материала по толщине их стенок, исключении трещин и цека на поверхности изделий и снижении брака готовой продукции. Способ формования заготовок огнеупорных керамических изделий включает приготовление формовочной смеси на основе корунда и муллита разных фракций, формование заготовки путем заливки смеси в гипсовую форму при воздействии на нее вибрации, выдержку в форме до полного затвердевания формовочной смеси, извлечение заготовки из формы и ее сушку. Перед заливкой формовочной смеси гипсовую форму пассивируют путем окунания в дистиллированную воду с выдержкой в воде в течение 0,5–4,0 мин и затем на воздухе в течение 2,0–8,0 мин. 1 табл.

НАБИВНАЯ ПАСТА ВЫСОКОЙ НАБУХАЮЩЕЙ СПОСОБНОСТИ ДЛЯ ЭЛЕКТРОЛИЗЕРА АЛЮМИНИЯ

... 1. Холоднонабивная паста высокой набухающей способности для применения в соединительных элементах электролитических ячеек получения алюминия электролизом глинозема, включающая смесь пека, легкого масла и углеродистого наполнителя, где указанный наполнитель содержит антрацит и измельченные анодные огарки или обожженный нефтяной кокс, где измельченные анодные огарки или обожженный нефтяной кокс составляют до 20 мас.% от общей массы наполнителя. 2. Холоднонабивная паста высокой набухающей способности по п.1, отличающаяся тем, что измельченные анодные огарки или обожженный нефтяной кокс составляют примерно от 15 до 20 мас.% от общей массы наполнителя. 3. Холоднонабивная паста высокой набухающей способности по п.1, отличающаяся тем, что содержит от 10 до 15 мас.% указанного пека. 4. Холоднонабивная паста высокой набухающей способности по п.1, отличающаяся тем, что содержит примерно от 5 до 10 мас.% указанного легкого масла. 5. Холоднонабивная паста высокой набухающей способности по п.4, отличающаяся ...

ВОЛОКНА НА ОСНОВЕ ОКСИДА ЦИРКОНИЯ/ОКСИДА МЕТАЛЛА

... 1. Способ получения волокна на основе циркония/оксида металла, включающий i) смешивание раствора соли металла или коллоидной дисперсии оксида металла, где упомянутый металл выбирают из группы, состоящей по меньшей мере из одного из металлов Группы IIA, переходного металла, металлов Группы IIIA и металлов Группы IIIB, с коллоидной дисперсией аморфного цирконийсодержащего полимера согласно формуле (I) [Zr4(OH)12(X)2(H2O)4]n (X)2n· 2nH2O, где Х представляет анион, совместимый с цирконийсодержащим полимером; n представляет целое число от 1 до менее 200, для создания смешанной коллоидной дисперсии; формование смешанной коллоидной дисперсии в волокно на основе циркония/металла. 2. Способ по п.1, в котором Х выбирают из группы, состоящей из NO3-, Cl- и ClCH2COO-. 3. Способ по п.2, дополнительно отличающийся тем, что упомянутая коллоидная дисперсия цирконийсодержащего полимера имеет соотношение Х к цирконию в диапазоне от около 1,0-0,98 до около 1,0-1,3 для поддержания упомянутой коллоидной дисперсии ...

СОВОКУПНОСТЬ КЕРАМИЧЕСКИХ ЧАСТИЦ И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ (ВАРИАНТЫ)

... 1. Совокупность керамических частиц, содержащая:множество отдельных сыпучих керамических частиц, причем указанное множество частиц имеет полную массу и гранулометрический состав частиц, включающий размеры частиц dи d, гранулометрический состав имеет эффективную ширину, которая является разностью между размерами частиц dи dгранулометрического состава, причем указанная эффективная ширина гранулометрического состава превышает 100 микронов и содержит три прилегающие и неперекрывающиеся области, включая первую область, вторую область и третью область, где первая область прилегает ко второй области, а вторая область прилегает к третьей области; и где ширина указанной второй области составляет по меньшей мере 25% эффективной ширины; игде масса частиц во второй области не превышает 15% полной массы множества частиц, а масса частиц в первой области и третьей области каждая превышает массу частиц во второй области.2. Совокупность по п.1, у которой отношение d:dпревышает 0,22.3. Совокупность по п.1 ...

КОМПОЗИТНЫЙ ОГНЕУПОРНЫЙ МАТЕРИАЛ ДЛЯ ВНУТРЕННЕЙ ФУТЕРОВКИ ДОМЕННОЙ ПЕЧИ

... 1. Огнеупорный материал (10), предназначенный для использования во внутренней футеровке доменной печи, при этом огнеупорный материал представляет собой многослойный композитный материал, содержащий защитный слой (12) и проводящий слой (14), причем прочность межслойного соединения между индивидуальными слоями составляет более чем 6 МПа.2. Огнеупорный материал (10) по п.1, в котором прочность межслойного соединения между индивидуальными слоями составляет, по меньшей мере, 7 МПа, предпочтительно, по меньшей мере, 7,5 МПа, предпочтительнее, по меньшей мере, 8 МПа, еще предпочтительнее, по меньшей мере, 8,5 МПа и наиболее предпочтительно, по меньшей мере, 9 МПа.3. Огнеупорный материал (10) по п.1 или 2, который состоит из защитного слоя (12) и проводящего слоя (14).4. Огнеупорный материал (10) по п.1 или 2, который состоит из защитного слоя (12), проводящего слоя (14) и одного или более промежуточных слоев, расположенных между защитным слоем (12) и проводящим слоем (14).5. Огнеупорный материал ...

ПОЛИМЕРИЗУЕМЫЙ НЕОРГАНИЧЕСКИЙ-ОРГАНИЧЕСКИЙ РАСТВОР ПРЕДШЕСТВЕННИКА ДЛЯ НАНОРАЗМЕРНЫХ ОКСИДОВ МЕТАЛЛОВ, ЕГО ПРИМЕНЕНИЕ ДЛЯ ПОЛУЧЕНИЯ СПЕЧЕННОЙ МЕМБРАНЫ И ЕЕ ПРИМЕНЕНИЕ

... 1. Полимеризуемый неорганический-органический раствор предшественника для наноразмерных оксидов металлов, получаемый способом, включающим стадии: ! (a) получение раствора, по крайней мере, одного катиона металла и органического соединения, и ! (b) нагревание раствора до температуры от 20 до 300°С с получением полимеризуемого раствора предшественника для наноразмерных оксидов, и ! (c) завершение нагревания, когда вязкость при комнатной температуре составит от 10 до 500 мПа·сек. ! 2. Полимеризуемый неорганический-органический раствор предшественника по п.1, где, по крайней мере, один катион металла выбирают из группы, включающей Се, Gd, Co, Al, Sm, Fe, Mg, Ni, Y, Zr, La, Sr, Mn, Sc, Ti и их смеси. ! 3. Полимеризуемый неорганический-органический раствор предшественника по п.1, где, по крайней мере, одно органическое соединение имеет карбонильную группу или является мономерным соединением. ! 4. Полимеризуемый неорганический-органический раствор предшественника по п.3, где, по крайней мере, ...

ТЕПЛОИЗОЛЯЦИОННОЕ ИЗДЕЛИЕ

... 1. Теплоизоляционное изделие, представляющее собой стойкий к высоким температурам мат или плиту из неорганического волокна, пропитанный коллоидным неорганическим оксидом, прессованный и высушенный, отличающийся тем, что коллоидный неорганический оксид представляет собой композицию коллоидного неорганического оксида в комбинации с гелирующим агентом, при этом изделие имеет рабочую температуру, по меньшей мере, до примерно 1000°С и сохраняет механическую целостность после воздействия рабочей температуры, имеет плотность больше или равную примерно 500 кг/см3, и прочность на сжатие по меньшей мере примерно 4,900 кПа (50 кгс/см2). ! 2. Теплоизоляционное изделие по п.1, отличающееся тем, что коллоидный неорганический оксид представляет собой композицию коллоидного кремнезема в комбинации с гелирующим агентом, при этом изделие имеет плотность больше или равную 700 кг/см3, и прочность на сжатие, по меньшей мере, примерно 7,800 кПа (80 кгс/см3). ! 3. Теплоизоляционное изделие по п.2, отличающееся ...

ПРИГОДНЫЕ ДЛЯ ПОВЫШЕНИЯ ЭЛАСТИЧНОСТИ ГРУБОКЕРАМИЧЕСКИХ ОГНЕУПОРНЫХ ИЗДЕЛИЙ ОГНЕУПОРНЫЕ ГРАНУЛЯТЫ ШПИНЕЛИ, СПОСОБ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

СПОСОБ ПОЛУЧЕНИЯ ПРОППАНТА (ВАРИАНТЫ) И СПОСОБ ГИДРАВЛИЧЕСКОГО РАЗРЫВА ПЛАСТА С ИСПОЛЬЗОВАНИЕМ ПОЛУЧЕННОГО ПРОППАНТА (ВАРИАНТЫ)

... 1. Способ получения проппанта, включающий этапы: соединение, по меньшей мере, одного первого компонента из группы: минерал, содержащий оксид алюминия, неочищенный глинозем, и, по меньшей мере, одного второго компонента, являющегося источником бора для образования сырьевой смеси, добавление в сырьевую смесь от 5 до 25 вес.% воды, перемешивание смеси до образования гранул, и последующего обжига гранул при температуре 1300-1600°С. ! 2. Способ получения проппанта, включающий шаги: соединение материалов первого компонента: оксида алюминия и/или неорганической соли соединений алюминия с минералом, содержащим оксид алюминия, и/или неочищенным глиноземом, добавление, по меньшей мере, одного второго компонента, являющегося источником бора, для образования сырьевой смеси, добавление в сырьевую смесь от 5 до 25 вес.% воды, перемешивание смеси до образования гранул, и последующего обжига гранул при температуре 1300-1600°С. ! 3. Способ по п.1 или 2, в котором минерал, содержащий оксид алюминия включает ...

СПОСОБ ПОЛУЧЕНИЯ ОГНЕУПОРНОГО МАТЕРИАЛА ДЛЯ ПРИМЕНЕНИЯ В ВЕРХНЕМ СТРОЕНИИ ВАННЫХ СТЕКЛОВАРЕННЫХ ПЕЧЕЙ, А ТАКЖЕ СПОСОБ ПОВЫШЕНИЯ СПЕКТРАЛЬНОГО КОЭФФИЦИЕНТА ИЗЛУЧЕНИЯ У ФОРМОВАННЫХ ОГНЕУПОРНЫХ ИЗДЕЛИЙ

ЗАЩИТА ПРОТИВ ОКИСЛЕНИЯ ИЗДЕЛИЙ ИЗ КОМПОЗИЦИОННОГО УГЛЕРОДОСОДЕРЖАЩЕГО МАТЕРИАЛА

... 1. Способ защиты от окисления детали, изготовленной из композиционного углеродсодержащего материала, имеющего открытые внутренние поры, включающий: ! импрегнирование детали жидкой импрегнирующей композицией, содержащей по меньшей мере одно соединение фосфатного типа, через посредство по меньшей мере части наружной поверхности детали; ! нанесение покрывающей композиции на указанную часть внешней поверхности детали, при этом покрывающая композиция содержит коллоидный раствор по меньшей мере одного огнеупорного оксида в воде, по меньшей мере одно соединение по существу боросиликатного типа в порошкообразной форме и обладающее свойствами залечивания, и по меньшей мере один борид металла в порошкообразной форме; и ! осуществление термической обработки после нанесения покрывающей композиции. ! 2. Способ по п.1, где коллоидный раствор является щелочным. ! 3. Способ по п.2, в котором используют коллоидный раствор, стабилизированный основным соединением. ! 4. Способ по любому из пп.1-3, где покрывающая ...

ПОЛНОСТЬЮ КЕРАМИЧЕСКОЕ МИКРОИНКАПСУЛИРОВАННОЕ ТОПЛИВО, ИЗГОТОВЛЕННОЕ С ВЫГОРАЮЩИМ ПОГЛОТИТЕЛЕМ В КАЧЕСТВЕ ИНТЕНСИФИКАТОРА СПЕКАНИЯ

МАТРИЦА, СОБИРАЕМАЯ С ПОМОЩЬЮ МАКРОПОРИСТОГО ЗАТВЕРДЕВШЕГО ВЯЖУЩЕГО

... 1. Сборная керамическая матрица, содержащая элементы, плотно скрепленные друг с другом посредством стыка, причем стык и/или периферийное покрытие содержит затвердевшее вяжущее, имеющее в плоскости среза, перпендикулярной, по меньшей мере, к одной из находящихся напротив друг друга сторон элементов, собранных с помощью указанного стыка, поры с эквивалентным диаметром от 200 мкм до 40 мм, называемые ниже «макропорами», в таком количестве, чтобы в указанной плоскости среза суммарная площадь поверхность, занятая указанными макропорами, составляла более 15% и менее 80% наблюдаемой суммарной площади поверхности, причем более 50% макропор имеют эквивалентный диаметр от 500 мкм до 5 мм.2. Матрица по п.1, отличающаяся тем, что затвердевшее вяжущее содержит менее 10% неорганических волокон в мас.% от сухого минерального вещества.3. Матрица по п.1, отличающаяся тем, что затвердевшее вяжущее содержит органические волокна в количестве более 0,1% в мас.% от сухого минерального вещества.4. Матрица по ...

САМОВЫРАВНИВАЮЩАЯСЯ БЕТОННАЯ СМЕСЬ

... 1. Порошок, содержащий в мас.%:(a) от 94% до 99% частиц по меньшей мере одного огнеупорного материала, основным компонентом или компонентами которого являются оксид алюминия и/или диоксид циркония, и/или диоксид кремния;(b) от 1% до 6% гидравлического цемента;(c) от 0 до 0,03% органических волокон;(d) необязательно от 0,075% до 1%, предпочтительно от 0,1% до 1%, поверхностно-активного вещества и(e) необязательно ускоритель схватывания,при этом фракция частиц, обладающих размером менее 40 мкм, распределена в мас.% относительно массы порошка следующим образом:- фракция <0,5 мкм: ≥4%- фракция <2 мкм: ≥5%,- фракция <10 мкм: ≥16%- фракция <40 мкм: 29-45%,и доля диоксида циркония во фракции частиц с размером менее 10 мкм, называемых «мелкими фракциями», находится в диапазоне от 35 мас.% до 75 мас.% относительно общей массы указанной фракции.2. Порошок по п.1, содержащий от 0,075% до 1% поверхностно-активного вещества и/или содержащий ускоритель схватывания.3. Порошок по п.1, в котором доля диоксида ...

ДЕТАЛЬ ИЗ КОМПОЗИЦИОННОГО МАТЕРИАЛА ОКСИД/ОКСИД С ТРЕХМЕРНЫМ УСИЛЕНИЕМ И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ

КЕРАМИЧЕСКАЯ КОМПОЗИЦИЯ И СПОСОБ ПОЛУЧЕНИЯ УКАЗАННОЙ КОМПОЗИЦИИ

СЦИНТИЛЛЯЦИОННЫЙ МАТЕРИАЛ

СПОСОБ ПРОИЗВОДСТВА ПОЛНОСТЬЮ КЕРАМИЧЕСКОГО МИКРОИНКАПСУЛИРОВАННОГО ЯДЕРНОГО ТОПЛИВА

МАТЕРИАЛ ДЛЯ ГАЗИФИКАТОРА НА ОСНОВЕ ОКСИДОВ АЛЮМИНИЯ И МАГНИЯ

... 1. Плавлено-литое огнеупорное изделие, имеющее следующий химический состав в массовых процентах в пересчете на оксиды:2. Огнеупорное изделие по п.1, в котором содержание CuO составляет более или равно 0,10 мас.% и менее или равно 0,8 мас.%.3. Огнеупорное изделие по п.2, в котором содержание CuO составляет более или равно 0,15 мас.% и менее или равно 0,7 мас.%.4. Огнеупорное изделие по п.3, в котором содержание CuO составляет более или равно 0,20 мас.% и менее или равно 0,6 мас.%.5. Огнеупорное изделие по п.1, в котором содержание BOсоставляет более или равно 0,05 мас.%.6. Огнеупорное изделие по п.5, в котором содержание BOсоставляет более или равно 0,1 мас.%.7. Огнеупорное изделие по п.1, в котором содержание BOсоставляет менее или равно 0,6 мас.%.8. Огнеупорное изделие по п.7, в котором содержание BOсоставляет менее или равно 0,3 мас.%.9. Огнеупорное изделие по п.1, в котором содержание оксида алюминия AlOсоставляет менее или равно 70 мас.% и более или равно 55 мас.%.10. Огнеупорное изделие ...

КЕРАМИЧЕСКОЕ ИЗДЕЛИЕ С ОРИЕНТИРОВАННЫМИ ЧАСТИЦАМИ И СПОСОБ ЕГО ПОЛУЧЕНИЯ

АЭРОГЕЛИ, КАЛЬЦИНИРОВАННЫЕ ИЗДЕЛИЯ, ИЗДЕЛИЯ С КРИСТАЛЛИЧЕСКОЙ СТРУКТУРОЙ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

... 1. Монолитный аэрогель, содержащий органический материал и частицы кристаллического оксида металла, при этом количество частиц кристаллического оксида металла находится в диапазоне от 3 до 20 объемных процентов, исходя из общего объема монолитного аэрогеля, причем, по меньшей мере, 70 мольных процентов кристаллического оксида металла представляют собой ZrO.2. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат в диапазоне от 1 до 15 мольных процентов кристаллического оксида металла, представляющего собой YO.3. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат первое множество частиц, и второе, отличное от него, множество частиц.4. Способ получения не содержащего трещин кальцинированного изделия из оксида металла, имеющего x, y и z размеры, по меньшей мере, 5 мм, плотность в диапазоне от 30 до 95 процентов от теоретической плотности, и средний размер соединенных пор в диапазоне от 10 нм до 100 ...

СОДЕРЖАЩЕЕ ГРАФИТ ОГНЕСТОЙКОЕ ИЗДЕЛИЕ, СПОСОБ ЕГО ПОЛУЧЕНИЯ И ЕГО ПРИМЕНЕНИЯ

ВЫСОКОДИСПЕРСНЫЕ ЩЕЛОЧНОЗЕМЕЛЬНЫЕ ТИТАНАТЫ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ С ИСПОЛЬЗОВАНИЕМ ЧАСТИЦ ОКИСИ ТИТАНА

... 1. Способ получения щелочноземельных титанатов путем реакции обмена щелочноземельных металлических соединений с частицами двуокиси титана в твердотельной реакции, отличающийся тем, что частицы двуокиси титана имеют удельную поверхность (ВЕТ) свыше 50 м/г, и обмен осуществляют при температурах ниже 700°С.2. Способ по п.1, отличающийся тем, что щелочноземельным соединением является гидроксид бария.3. Способ по п.2, отличающийся тем, что обмен осуществляют при 450°С, предпочтительно в интервале 350-450°С.4. Способ по п.1, отличающийся тем, что щелочноземельным соединением является нитрат бария.5. Способ по п.4, отличающийся тем, что обмен осуществляют при температурах ниже 650°С, предпочтительно в интервале 550-650°С.6. Способ по одному или нескольким из предыдущих пунктов, отличающийся тем, что частицы двуокиси титана содержат менее 1000 частиц на миллион галогенидов относительно TiO.7. Способ по п.1, отличающийся тем, что частицы двуокиси титана содержат менее 1000 частиц на миллион углерода ...

ПОЛИКРИСТАЛЛИЧЕСКИЕ АБРАЗИВНЫЕ МАТЕРИАЛЫ И СПОСОБ ИХ ИЗГОТОВЛЕНИЯ

... 1. Способ изготовления поликристаллического абразивного элемента, включающий стадии использования множества сверхтвердых абразивных частиц, обладающих витреофильными поверхностями, нанесения на сверхтвердые абразивные частицы покрытия из материала-предшественника матрицы, обработки обладающих покрытием сверхтвердых абразивных частиц, чтобы сделать их пригодными для спекания, и объединения и спекания обладающих покрытием сверхтвердых абразивных частиц при давлении и температуре, при которых они являются кристаллографически или термодинамически стабильными.2. Способ по п.1, в котором обладающие покрытием сверхтвердые абразивные частицы обрабатывают для превращения материала-предшественника матрицы в оксид, нитрид, карбид, оксинитрид, оксикарбид или карбонитрид материала-предшественника матрицы, или в элементную форму материала-предшественника матрицы, или в их комбинации.3. Способ по п.1, в котором материал-предшественник матрицы представляет собой аморфный или нанокристаллический оксид, ...

КЕРАМИЧЕСКИЕ ПАСТЫ, ИМЕЮЩИЕ НЕСТАНДАРТНУЮ РЕЦЕПТУРУ С СОДЕРЖАНИЕМ ФОСФОРА БОЛЕЕ 2 МАС.%, СПОСОБ ИХ ПРИГОТОВЛЕНИЯ И ИХ ПРЕИМУЩЕСТВА

... 1. Керамическая паста, в рецептуру которой входят соединения фосфора в количестве свыше 2%, отличающаяся следующим составом, мас.%: а) от 2 до 80% соединений фосфора, б) от 20 до 98% обезжиривающих материалов, в) от 0 до 80% воды. 2. Керамическая паста по п.1, отличающаяся тем, что указанные соединения фосфора по существу представляют собой соль или сочетание различных солей, выбранных из фосфатов аммония или гидрофосфатов аммония, фосфатов или гидрофосфатов одновалентных элементов, или смеси различных фосфатов аммония и гидрофосфатов и одновалентных элементов. 3. Керамическая паста по п.1 или 2, отличающаяся тем, что помимо указанных выше соединений фосфора в ее рецептуру могут входить фосфаты или гидрофосфаты двухвалентных элементов или элементов с множественной валентностью, включая валентность+2, фосфаты или гидрофосфаты трехвалентных элементов или элементов с множественной валентностью, включая валентность +3, и фосфаты или гидрофосфаты четырехвалентных элементов или элементов с множественной ...

ПРОНИЦАЕМЫЙ ОГНЕУПОРНЫЙ МАТЕРИАЛ ДЛЯ ПРОДУВАЕМОГО ГАЗОМ СОПЛА

... 1. Проницаемый материал, имеющий проницаемость по меньшей мере около 50 cD, представляющий собой связанный смолой материал, который изготовлен из композиции, которая содержит огнеупорный заполнитель; 0,5-15 вес.% по меньшей мере одного газопоглотителя кислорода; и связующее. 2. Проницаемый материал по п.1, в котором огнеупорный заполнитель составляет по меньшей мере 80 вес.% композиции, причем огнеупорный заполнитель содержит по меньшей мере около 60 вес.% заполнителя, имеющего размер частиц +80 меш или больше; меньше, чем 20 вес.% заполнителя, имеющего размер частиц от -80 до +325 меш; и меньше, чем 20 вес.% заполнителя, имеющего размер частиц меньше, чем -325 меш. 3. Проницаемый материал по п.2, в котором огнеупорный заполнитель содержит по меньшей мере один оксид, выбранный из группы, в которую входят оксид алюминия, оксид магния, диоксид кремния, диоксид циркония, оксид кальция, а также их смеси и соединения. 4. Проницаемый материал по одному из пп.1-3, в котором газопоглотитель кислорода ...

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 ...

Шихта для изготовления керамического материала(варианты)

Изобретение относится к области керамического материаловедения, а именно к составам шихты для производства керамического материала конструкционного назначения. Шихта содержит смесь γ-оксида алюминия, карбоната бария и оксидной добавки. Согласно первому варианту, в качестве добавки шихта содержит оксид железа (III) при следующем соотношении компонентов, моль: γ-Al2O3 5-5,5; BaСO3 1; Fe2O3 0,5-1. Согласно второму варианту, в качестве добавки шихта содержит оксид марганца (III) при следующем соотношении компонентов, моль: -Al2O3 5-5,5; BaСO3 1; Mn2O3 0,5-1. Технический результат: повышение предела прочности при сжатии заявляемых керамических материалов до 276,9-562,5 МПа. 2 н.п. ф-лы, 1 табл.

FEUERFESTE ZUSAMMENSETZUNGEN

Wässriges Bindemittelsystem für ein Schnellverfahren

SINTERBESTÄNDIGES KATALYSATORMATERIAL UND VERFAHREN ZU DESSEN HERSTELLUNG

Hochtemperaturbeständiger, mechanisch stabiler Temperaturfühler

Anlage für die thermische Entsorgung von Industrieabfall, insbesondere Reifen.

Druckverfahren zur Herstellung eines Grünkörpers, Grünkörper und keramischer Formkörper

Verfahren zur Herstellung eines Grünkörpers, bei dem man a) eine Schicht, die ein keramisches, glaskeramisches oder Glaspulver enthält, auf einer Unterlage bildet, b) mindestens eine Verfestigungszusammensetzung auf die zuvor genannte Schicht auf zumindest einen Teil davon appliziert, die wenigstens eine organometallische Verbindung, wobei diese wenigstens ein Atom aufweist, das nicht C, Si, H, O oder N ist, und dieses Atom an wenigstens einen organischen Rest gebunden ist, enthält, c) Schritte a) und b) mindestens einmal wiederholt, und d) das nicht gebundene keramische Pulver entfernt, wobei der Grünkörper freigelegt wird, wobei die Viskosität der Verfestigungszusammensetzung höchstens 50 mPa × s bei 20°C und 1 bar beträgt.

Verfahren zur Herstellung von für die Herstellung von Keramik geeigneten Metallopolysiloxanen und die so hergestellten Polymere.

Präkeramische Bor-enthaltende Polymere

FEUERFESTE ISOLIERUNGSZUSAMMENSETZUNG UND VERFAHREN ZU IHRER HERSTELLUNG

Selbsthaertender Formstoff zur Herstellung von Giessformen und Giesskernen

SCHLEIFKÖRNER AUF DER BASIS VON ALUMINIUM- UND ZIRKONIUMOXYNITRID

Keramischer Verbundwerkstoff.

Zinkoxid-Sinterkörper und Verfahren zur Herstellung desselben

Plättchenförmiger Zinkoxid-Sinterpressling, enthaltend 0,80 Gew.-% oder weniger mindestens ein erstes Dotierungselement, ausgewählt aus der Gruppe, bestehend aus Al, Ga und In, wobei der Rest im Wesentlichen aus ZnO besteht, wobei die (002)-Ebenenorientierung in der Platten-Oberfläche 60% oder mehr ist.

VERFAHREN ZUR HERSTELLUNG EINER LICHTEMPFINDLICHEN KERAMISCHEN ZUSAMMENSETZUNG UND MEHRSCHICHTIGES SUBSTRAT DAMIT

Gesinterte Cordierit-Keramik und Verfahren zur Herstellung derselben

Gesinterter keramischer Verbundkörper und Verfahren zu seiner Herstellung.

KORROSIONSBESTÄNDIGES ELEMENT

Ein korrosionsbeständiges Element gemäß der Offenbarung weist eine Aluminiumoxid-Keramik auf, welche α-Aluminiumoxid und Anorthit enthält. Die Aluminiumoxid-Keramik enthält, bezogen auf die Masse, in Summe 0,4% oder mehr von Ca und Si in Form von CaO bzw. SiO, und ein Massenverhältnis von CaO/SiOfällt in einen Bereich von 0,5 bis 2. Darüber hinaus ist ein Verhältnis B/A einer Röntgenbeugungsspitzenintensität B für die (004)-Ebene des Anorthits zu einer Röntgenbeugungsspitzenintensität A für die (104)-Ebene des α-Aluminiumoxids in einer Oberfläche der Aluminiumoxid-Keramik 0,01 oder mehr.

Festelektrolytkörper für Gassensorelement, dessen Herstellungsverfahren und Gassensorelement

Ein Festelektrolytkörper für ein Gassensorelement (1), das durch die Festelektrolytpartikel (2) gebildet wird, die aus Zirconiumdioxid hergestellt sind, das einen Stabilisator enthält, eine Festelektrolytphase (M) aufweist, in welcher eine große Anzahl der Festelektrolytkörperpartikel aggregiert werden, und in der Festelektrolytphase Paare der Festelektrolytpartikel, die aneinander angrenzen, keine Partikelgrenzflächen-Verunreinigungsschicht zwischen ihren Partikelgrenzflächen (21) aufweisen, und die Partikelgrenzflächen einander direkt kontaktieren.

HERSTELLUNGSVERFAHREN EINES WABENFILTERS ZUR REINIGUNG VON ABGAS

Mehrschichtige keramische Platine, Verfahren zu ihrer Herstellung und ihre Anwendung.

Feuerfestes keramisches Material und zugehöriges Formteil und Masse

Feuerfestes keramisches Material der Zusammensetzung: a) 30 bis 66,5 M.-% MgO b) 10 bis 52,5 M.-% Al2O3 c) 5 bis 35,0 M.-% Cr2O3 d) 0 bis 5 M.-% sonstige Bestandteile mit a) + b) + c) + d) = 100 M.-%, dessen Gefüge zu 45 bis 95 M.-% aus einer MAC (MgOAl2O3Cr2O3) Spinellphase der Zusammensetzung e) 20 bis 28 M.-% MgO f) 17 bis 67 M.-% Al2O3 g) 6 bis 62 M.-% Cr2O3 h) 0 bis 5 M.-% sonstige Bestandteile und zu 5 bis 55 M.-% mindestens aus einer weiteren Gefügephase besteht, wobei Zusammensetzungen ausgeschlossen werden, die im Dreistoffsystem MgO-Al2O3-Cr2O3 innerhalb eines Bereichs liegen, der durch folgende Eckpunkte definiert ist, soweit sich dieser Bereich mit der Zusammensetzung gemäß a) bis d) überschneidet: A' = 53 Gew.-% MgO, 44 Gew.-% Al2O3 und 3 Gew.-% Cr2O3 A'' =...

Preparation of a powder mixture useful in which ceramic and metallic powders are mixed with a solvent and deagglomerated useful for production of sintered ceramic products

Preparation of a powder mixture for production of ceramic sintered products in which one or more ceramic and metallic powders are mixed with a solvent, e.g. alcohol and optionally a dispersing agent, deagglomerated, so that on addition of organic additives as binder and plasticizer, the mixture can be homogenized and degassed by solvent evaporation and granulated to give a granulate for ceramic sintered products is new. A process for preparation of a powder mixture for production of ceramic sintered products for reaction conditions in which one or more ceramic and metallic powders is mixed with a solvent, e.g. alcohol and optionally a dispersing agent, deagglomerated, so that on addition of organic additives as binder and plasticizer, the mixture can be homogenized and after removal from, e.g. a grinding mill, degassed by solvent evaporation and granulated to give a granulate for ceramic sintered products. A mixture of preferably an alcoholic solvent and dispersing agent is made and divided ...

Sizing liquids, useful for the production of a high temperature-stable coating, comprises at least a nanoscale inorganic binder system, boron nitride and at least a solvent

Sizing liquids for the production of a high temperature-stable coating comprises at least a nanoscale inorganic binder system, boron nitride and at least a solvent. INDEPENDENDANT CLAIMS are included for: (1) a method for the preparation of a high temperature-stable coating of metallic-, ceramic-, enamel- and/or glass- surfaces, comprising applying the sizing liquid on a surface and solidifying the applied mixture through heating; (2) a method for repairing a high temperature-stable coating of metallic-, ceramic-, enamelled- and/or glass- surfaces, comprising repairing the damaged coating by partial or complete application of the sizing liquid on the damaged coating and solidifying through heating; and (3) a high temperature-stable coating, which is obtained by the above method.

PVD-Beschichtungsmaterial

Die Erfindung betrifft als Beschichtungsmaterial zum PVD-Beschichten geeignete Sintermaterialien auf der Basis von ZnO, die eine ZnAl¶2¶O¶4¶-Spinellphase und eine monokline Al¶2¶Y¶4¶O¶9¶-Phase umfassen, Verfahren zu deren Herstellung, ihre Verwendung als Beschichtungswerkstoffe zur PVD-Beschichtung von Substraten, sowie die so beschichteten Substrate.

Abgasreinigungsfilter und Verfahren zu dessen Herstellung

Ein Verfahren zum Herstellen eines Abgasreinigungsfilters zum Einfangen von Partikeln zum Reinigen von Abgasen wird bereitgestellt. Ein ein organisches Bindemittel enthaltender Keramikwerkstoff wird in ein Wabenstück extrusionsgegossen, und das so gegossene Wabenstück wird dann getrocknet und auf eine vorbestimmte Länge geschnitten, sodass ein gegeossenes Wabenstück 100 vorbereitet ist, das Zwischenwände 11 und eine Vielzahl von Zellen 12 von im Wesentlichen dreieckigem Querschnitt aufweist. Große, bei Betrachtung von vorne im Wesentlichen sechseckige Öffnungen, werden durch das Verformen der Zwischenwände 11 bei Öffnungen 13 in den Zellen 12 des gegossenen Wabenstücks 100 bereitgestellt und geschlossene Abschnitte werden so angrenzend an die großen Öffnungen bereitgestellt. Danach wird das gegossene Wabenstück 100 kalziniert.

Schnittschablone aus Keramik

Gegenstand der vorliegenden Erfindung ist eine Schnittschablone bzw. ein Sägeblock, vorzugsweise eine Schnittschablone bzw. ein Sägeblock zum Einsatz in der Medizintechnik.

Verwendung eines geformten Erzeugnisses aus feuerfestem keramischem Material

Die Erfindung betrifft ein geformtes Erzeugnis aus feuerfestem keramischem Material.

VERFAHREN ZUR HERSTELLUNG EINES FEUERFESTEN MATERIALS

VERFAHREN ZUR HERSTELLUNG KERAMISCHER UND/ODER METALLISCHER BAUTEILE

Verfahren zur Herstellung keramischer und/oder metallischer Bauteile, bei dem mit einem Polymer eine mindestens einen Freiraum umschließende Stützstruktur ausgebildet wird und bei dem mindestens ein Freiraum zumindest in einem vorgebbaren Bereich mit einem plastisch verformbaren oder flüssigen Gemisch mindestens eines Metall- oder Keramikpulvers und mindestens einem organischen Binder befüllt wird, so dass das Gemisch zumindest teilweise an der Wandung der Stützstruktur anliegt, wobeidie Stützstruktur in mehreren übereinander angeordneten Ebenen durch schichtweisen, flächigen oder selektiven Auftrag des nicht ausgehärteten viskosen Polymers oder Polymergemischs auf die Oberfläche eines Trägers ausgebildet wird und anschließend bei einem flächigen Auftrag eine lokal definierte Aushärtung des Polymers durch einen lokal definierten Energieeintrag oder Stoffeintrag erfolgt und anschließend nicht ausgehärtetes Polymer entfernt wird undbei einem selektiven Auftrag das Polymer lediglich in Bereichen ...

Gesintertes cBN-Material und Schneidwerkzeug

Bereitgestellt wird ein cBN-Sintermaterial für einen Werkzeugkörper, worin ein Verhältnis (PN/ PN) der Anzahl (PN) der cBN-Partikel in Kontakt mit dem Ti-Borid mit einer langen Achse von 150 nm oder mehr zur Gesamtanzahl (PN) von cBN-Partikeln 0,05 oder weniger beträgt ...

Aluminiumnitridwerkstoffe für Anwendungen im Metallguss

Gegenstand der Erfindung ist ein Werkstoff auf Basis von Aluminiumnitrid, der für Anwendungen im Metallguss verwendet werden kann. In einer weiteren Ausführungsform ist der Gegenstand der Erfindung ein Bauteil aus Alumniumnitridwerkstoffen, die beim Aufschmelzen, Legieren oder Transport mit flüssigem Metall in Berührung kommen.

Finely divided alpha-alumina powder, especially useful as a polishing additive in magnetic recording media, includes silicon, zirconium, phosphorus and/or boron oxide and titanium, iron and/or chromium oxide

Alumina powder with an average primary particle diameter of 10-100 nm and an alpha-alumina content of at least 90% (measured by X-ray diffraction) includes 0.1-10 wt.% silicon, zirconium, phosphorus and/or boron oxide and 0.1-30 wt.% titanium, iron and/or chromium oxide. An Independent claim is also included for producing an alpha-alumina powder by calcining a mixture of an aluminum-containing substance, a particle growth retardant and seed crystals in an atmosphere in which the partial pressure of water vapor is 600 Pa or less.

NTC-Masse, Thermistor und Verfahren zur Herstellung des Thermistors

NTC-Masse für die Herstellung eines Thermistors, die als Hauptbestanteil eine Verbindung aus dem Mn-Ni-O System enthält, die eine allgemeine Zusammensetzung von NiMnOaufweist,wobei y dem molaren Ni-Anteil am Gesamtmetallgehalt der Verbindung aus dem Mn-Ni-O System, definiert als c(Ni):(c(Ni) + c(Mn), entspricht und es gilt:0,500 < x < 0,6100,197 < y < 0.240.

WERKSTOFF AUS IN GEGENWART VON KOHLENSTOFF REAKTIONSGEBUNDENEN, ELEMENTARES SILICIUM ENTHALTENDEN PARTIKELN UND VERFAHREN ZU SEINER HERSTELLUNG

Flat surfaced ceramic multilayer substrate production - involves pressing green layer stack between confining elements

Production of a ceramic multilayer substrate involves (a) laminating green layers (21), including an inner layer bearing a conductive pattern, and pressing together with layer confining elements (22) applied onto opposite surfaces of the laminate so that the laminate and these elements are bonded together, each element (22) exhibiting a lower thickness change rate during bonding and a high firing temperature compared with the green layers (21); and (b) removing the layer confining elements (22) from the fired body after firing the assembly at the firing temperature of the green layers (21). Also claimed are similar methods in which pressure is applied to the assembly during firing.

oxidkeramischer Faserverbundwerkstoff sowie Verfahren und Vorrichtung zu dessen Herstellung

Kontinuierliches Verfahren zur Herstellung eines oxidkeramischen Faserverbundwerkstoffs (1), wobei der Faserverbundwerkstoffs (1) einen Kern (2) aus einer Mehrzahl von oxidkeramischen Multifilamentfasern (12) aufweist, wobei der Kern (2) eingebettet ist in eine Matrix (4) aus einem gesinterten Metalloxid, mit folgenden Verfahrensschrittena. Ausbilden eines kontinuierlichen Rovings (10) durch Bilden eines zwangsgeführten Bündels von endlosen oxidkeramischen Multifilamentfasern (12), wobei die Multifilamentfasern (12) im Roving (10) unidirektional ausgerichtet sind,b. Infiltrieren des Rovings mit einem Schlicker (32), der ein feinkörniges sinterfähiges Metalloxid in einer wässrigen Suspension umfasst,c. Einstellen einer gewünschten Querschnittsform des Rovings (10) durch mechanische Behandlung des Rovings (10),d. Bilden eines Grünlings (20) als Formkörper,e. Trocknen des Grünlings (20), undf. Sintern des Grünlings (20) unter Bildung des oxidkeramischen Faserverbundwerkstoffs (1).

Mn-Zn Ferrit und Spulenbestandteil mit Mn-Zn- Ferritkern

VERFAHREN ZUR HERSTELLUNG EINES GESINTERTEN ALUMINIUMTITANATPRODUKTES

Process for preparing a doping element metal oxide powder for ceramic zinc oxide varistors

The invention relates to a process for preparing a metal oxide powder containing the doping elements for a ceramic varistor based on doped zinc oxide. In this process, compounds of the required doping elements in the intended stoichiometric ratio are first mixed together with a zinc compound in an amount of not more than two tenths of the zinc oxide required in the varistor to give a common aqueous homogeneously dispersed solution and this is then subjected to spray pyrolysis. The metal oxide powder contains crystalline phases having a spinel and/or pyrochlore structure.

Keramik aus präkeramischen Papier- oder Pappstrukturen, Verfahren zu ihrer Herstellung und ihre Verwendung

Die Erfindung betrifft eine Keramik aus präkeramischen Papier- oder Pappstrukturen in einer bestimmten, zuvor in einer Papierstruktur abgebildeten Form, bei der erfindungsgemäß die präkeramischen Papiere oder Pappen einen Gehalt an keramischen Füllstoffen zwischen 30 und 95 Masse-% haben, wobei die keramischen Füllstoffe eine Partikelgröße < 30 mum aufweisen. Weiterhin betrifft die Erfindung ein Verfahren zur Herstellung derartiger Keramiken und ihre Verwendung.

PORZELLANZUSAMMENSETZUNG

Ungeformte, feuerfeste Massen

Seitenplatte für das Dünnbandgießen von Stahl

Die Erfindung betrifft Seitenplatten für das Dünnbandgießen von Stahl, umfassend entweder einen Mehrschichtaufbau aus Schichten unterschiedlicher Härte oder einen Einschichtaufbau, bei dem die seitlichen Ränder der Seitenplatte, die als Kontaktfläche zwischen der Seitenplatte und den Rollen der Dünnbandgießanlage dient, reduziert sind.

Refractory compositions

Polycrystalline abrasive constructions

Spark plug

A spark plug exhibits a satisfactory withstand voltage characteristic and sufficient mechanical strength in a high temperature environment exceeding 700° C. The spark plug has a center electrode, an insulator, and a ground electrode, characterized in that the insulator is formed of an alumina-based sintered material containing an Si component, a Group 2 element (2A) component, and a rare earth element (RE) component; that the alumina-based sintered material has an RE-β-alumina crystal phase; and that the mean crystal grain size D A (RE) of the RE-β-alumina crystal phase and that of alumina D A (Al) satisfy the following relationship (1): 0.2≦D A (RE)/D A (Al)≦3.0.

Ceramic honeycomb structure and its production method

A ceramic honeycomb structure having a large number of flow paths defined by porous cell walls; said porous cell walls being composed of cordierite crystals, mullite crystals, corundum crystals and/or spinel crystals; the percentage of the X-ray diffraction intensity of the cordierite crystals being 72% or more and less than 85%, the percentage of the X-ray diffraction intensity of the mullite crystals being 15-25%, and the percentage of the total X-ray diffraction intensity of the corundum crystals and the spinel crystals being 5% or less, per the total X-ray diffraction intensity of these crystals; said porous cell walls having a true density of 2.55-2.70 g/cm 3 , a mean pore diameter of 10-20 μm, and a porosity of 50-65%; the volume of pores having diameters exceeding 50 μm being 8-25% of the total pore volume, the volume of pores having diameters of less than 10 μm being 16-25% of the total pore volume, and the pore diameter distribution deviation σ being 0.5 or less.

Dielectric ceramic and laminated ceramic capacitor

A dielectric ceramic and a laminated ceramic capacitor using the dielectric ceramic are achieved which provide favorable thermal shock resistance without damaging properties or characteristics such as dielectric properties, insulation properties, temperature characteristics, and characteristics in high temperature loading, even when the dielectric layers are reduced in thickness and the number of stacked layers increased. The dielectric ceramic contains, as its main constituent, a barium titanate based compound represented by the general formula ABO 3 , and a crystalline oxide containing Al, Mg, and Si is present as secondary phase grains in the dielectric ceramic.

Highly zirconia-based refractory and melting furnace

A highly zirconia-based refractory suitable for an electric melting furnace, which has a high electrical resistivity and does not exhibit a chipping off phenomenon and which is scarcely susceptible to extraction of components even when in contact with molten low alkali glass and, hence, is less susceptible to cracking during operation. The highly zirconia-based refractory that includes, as chemical components by mass %, from 85 to 95% of ZrO 2 in terms of inner percentage, from 3.0 to 10% of SiO 2 in terms of inner percentage, from 0.85 to 3.0% of Al 2 O 3 in terms of inner percentage, substantially no Na 2 O, from 0.01 to 0.5% of K 2 O in terms of outer percentage, from 1.5 to 3.0% of SrO in terms of inner percentage, and from 0.1 to 2.0% of Nb 2 O 5 and/or Ta 2 O 5 as a value obtained by [(Nb 2 O 5 content)+(Ta 2 O 5 content/1.66)], in terms of inner percentage.

Cubic boron nitride compact

A CBN compact which contains CBN and a matrix phase, wherein the CBN grain size volume frequency distribution has a distribution spread expressed as d90-d10 of 1 micron or greater, and the d90 maximum value is 5 micron or less.

Negative active materials, lithium ion batteries, and methods thereof

Methods of preparing negative active materials and negative active materials are provided herein. The preparation methods include: A) mixing a carbon material, an organic polymer, a Sn-containing compound—optionally with water—to obtain a mixed solution system; B) adding a complexing agent into the mixed solution system obtained in step A optionally while stirring to form an intermediate solution; C) adding a reducing agent into the intermediate solution obtained in step B to a reaction product; D) optionally filtering, washing and then drying the reaction product to obtain the negative active material.

Refractory product with high zirconia content

A fused and cast refractory product including, in mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO 2 + Hf 2 O: balance to 100%; SiO 2 :  7.0% to 11.0%; Al 2 O 3 : 0.2% to 0.7%; Na 2 O + K 2 O: <0.10%; B 2 O 3 : 0.3% to 1.5%; CaO + SrO + MgO + ZnO + BaO:  <0.4%; P 2 O 5 : <0.15%; Fe 2 O 3 + TiO 2 : <0.55%; Other oxide species:  <1.5%; the mass content of a dopant selected from Nb 2 O 5 , Ta 2 O 5 and mixtures thereof being of less or equal to 1.0%, and the A/B ratio of the Al 2 O 3 /B 2 O 3 mass contents being less than or equal to 2.0.

Process And Apparatus For Manufacturing Ceramic Honeycombs

Methods and apparatus for making ceramic honeycombs by steps including compounding a plasticized ceramic batch mixture and forming the mixture into ceramic honeycombs by continuous extrusion, drying and firing, wherein one or more ceramic powders for the batch mixture are supplied by in-line homogenization as a powder feed having a median particle size D 50 that varies from a maximum value to a minimum value by an amount not exceeding 15% of the maximum value during a 24-hour period of continuous extrusion.

Light-emitting device with a luminescent medium, corresponding lighting system comprising the light-emitting device and corresponding luminescent medium

The invention relates to a light emitting device ( 1 ) with high colour rendering comprising a wavelength converting member ( 2 ) with a luminescent medium for wavelength conversion of blue light and/or ultraviolet light ( 10 ) into red light and/or yellow and/or green light and a light source ( 3 ) emitting blue light ( 10 ) and/or ultraviolet light arranged to pump the luminescent medium, said luminescent medium essentially having a main phase of a solid state host material which is doped with Ce 3+ -ions. According to the invention the host material comprises ions of a further rare-earth material Ln, wherein the host material is selected such that the emission energy of the 5d-4f emission on Ce 3+ -ions is energetically higher than the absorption energy into an upper 4f n state of the further rare-earth material Ln, and wherein the light emission of wavelength converted light is caused by an intra-atomic 4f n -4f n transition within the ions of the further rare-earth material. The invention further relates to a corresponding lighting system comprising the light-emitting device and a corresponding luminescent medium.

Refractory material with stainless steel and organic fibers

A refractory includes a cement, a binder and a matrix. The matrix comprises both stainless steel fibers and organic fibers. The refractory can be easily cast, without additional steel reinforcement, into large fire wall 16 panels 10 capable of meeting the requirements of testing conducted in accordance with ASTM E-119, Standard Test Methods for Fire Tests of Building Construction and Materials in support of IEEE Std. 979-1994, Guide for Substation Fire Protection . The fire wall 16 assembly withstood the fire endurance test without passage of flame and gases hot enough to ignite cotton waste during a four-hour fire exposure. The assembly also withstood a 45 psi water stream for five minutes immediately following the four-hour fire exposure period. This is a stringent mechanical requirement, as all fire walls 16 must maintain their integrity before, during and after a fire, per the Universal Building Code's definition of a true fire wall 16.

Green emitting material

The invention relates to an improved green emitting material of the form M I 3-x-y M II x Si 6-x Al x O 12 N 2 :Eu y , whereby M I is an earth alkali metal and M II is a rare earth metal or Lanthanum. This material can be made as a ceramic using a low temperature sintering step, resulting in a better and more uniform ceramic body.

Dielectric composition having high dielectric constant, multi layered ceramic condensers comprising the same, and method of preparing for multi layered ceramic condensers

A dielectric composition having a high dielectric constant, multi layered ceramic condensers comprising the same, and a method of preparing for multi layered ceramic condensers. The dielectric composition includes: a compound represented by general formula (Ba 1-X Ca x ) m (Ti 1-y Zr y )O 3 (0.995≦m≦1.010, 0.001≦x≦0.10, 0.001, 0.001≦y≦0.20) as a main component; an Al oxide as a first sub-component; at least one metal selected from a group consisting of Mg, Sr, Ba, Ca, and Zr and the salt thereof, as a second sub-component; at least one metal selected from a group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and the salt thereof, as a third sub-component; at least one metal selected from a group consisting of Cr, Mo, W, Mn, Fe, Co, and Ni and the salt thereof, as a fourth sub-component; and a fifth sub-component selected from Si containing glass forming compounds.

Shaded zirconium oxide articles and methods

A dental article includes yttria stabilized tetragonal zirconia polycrystalline ceramic, and no more than about 0.15 wt. % of one or more coloring agents of one or more of: Pr, Tb, Cr, Nd, Co, oxides thereof, and combinations thereof, whereby the dental article is provided with a color corresponding to a natural tooth shade; and wherein the dental article has a flexural strength of at least about 800 MPa. Corresponding methods are also described.

Self-Toughened High-Strength Proppant and Methods Of Making Same

Methods are described to make strong, tough, and lightweight whisker-reinforced glass-ceramic composites through a self-toughening structure generated by viscous reaction sintering of a complex mixture of oxides. The present invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses.

Biosoluble inorganic fiber

An inorganic fiber having the following composition: 71 wt % to 80 wt % of SiO 2 , 18 wt % to 27 wt % of CaO, 0 to 3 wt % of MgO, and 1.1 wt % to 3.4 wt % of Al 2 O 3 , wherein the amount of each of ZrO 2 and R 2 O 3 (R is selected from Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof) is 0.1 wt % or less, the amount of each alkaline metal oxide is 0.2 wt % or less and the total amount of SiO 2 , CaO, MgO and Al 2 O 3 is 99 wt % or more.

Low expansion corrosion resistant ceramic foam filters for molten aluminum filtration

A ceramic foam filter for molten aluminum alloys comprising an alumina silicate rich core and a boron glass shell and a chemical composition comprising: 20-70 wt % Al 2 O 3 , 20-60 wt % SiO 2 , 0-10 wt % CaO, 0-10 wt %; MgO and 2-20 wt % B 2 O 3 .

Ceramic material, laminate, member for use in semiconductor manufacturing equipment, and sputtering target member

A ceramic material mainly contains magnesium, aluminum, oxygen, and nitrogen, in which the ceramic material has a magnesium-aluminum oxynitride phase serving as a main phase, wherein XRD peaks of the magnesium-aluminum oxynitride phase measured with CuKα radiation appear at at least 2θ=47 to 50°.

Process for production of scandia-stabilized zirconia sheet, scandia-stabilized zirconia sheet obtained by the process, and scandia-stabilized zirconia sintered powder

The process for production of a scandia-stabilized zirconia sheet according to the present invention is characterized in comprising the steps of pulverizing a scandia-stabilized zirconia sintered body to obtain a scandia-stabilized zirconia sintered powder having an average particle diameter (De) determined using a transmission electron microscope of more than 0.3 μm and not more than 1.5 μm, and an average particle diameter (Dr) determined by a laser scattering method of more than 0.3 μm and not more than 3.0 μm, and a ratio (Dr/De) of the average particle diameter determined by the laser scattering method to the average particle diameter determined using the transmission electron microscope of not less than 1.0 and not more than 2.5; preparing a slurry containing the scandia-stabilized zirconia sintered powder and a zirconia unsintered powder, wherein a percentage of the scandia-stabilized zirconia sintered powder to a sum of the scandia-stabilized zirconia sintered powder and the zirconia unsintered powder in the slurry is not less than 2 mass % and not more than 40 mass %; forming the slurry into a greensheet; and sintering the greensheet.

Method for producing electrostatic chuck and electrostatic chuck

A method for producing an electrostatic chuck 10 includes the steps of (a) pouring a ceramic slurry containing a ceramic powder, a solvent, a dispersant, and a gelling agent into a first molding die 31 in which an electrostatic electrode precursor 24 is removably attached to an inner surface of the first molding die 31 , gelatinizing the ceramic slurry by causing a chemical reaction of the gelling agent, and then removing the first molding die 31 to prepare an embedded-electrode-containing ceramic molded body 41 X in which the electrostatic electrode precursor 24 is embedded in a first ceramic molded body 41 ; (b) preparing a second ceramic molded body 42 ; and (c) preparing a stacked calcined body 50 using the embedded-electrode-containing ceramic molded body 41 X and the second ceramic molded body 42 , and conducting hot-press firing of the stacked calcined body 50.

Coating compositions

Silicon nitride coated crucibles for holding melted semiconductor material and for use in preparing multicrystalline silicon ingots by a directional solidification process; methods for coating crucibles; methods for preparing silicon ingots and wafers; compositions for coating crucibles and silicon ingots and wafers with a low oxygen content.

Composite Material of Electroconductor Having Controlled Coefficient of Thermical Expansion

The present invention relates to a composite material comprising a ceramic component, characterized in that it has a negative coefficient of thermal expansion, and carbon nanofilaments, to its obtainment process and to its uses as electrical conductor in microelectronics, precision optics, aeronautics and aerospace.

Alpha-alumina inorganic membrane support and method of making the same

Compositions for making alpha-alumina supports for, for example, inorganic membranes are described. Methods for controlling the alumina and pore former particle sizes and other process variables are described which facilitate desirable porosity, pore distribution and strength characteristics of the resulting alpha-alumina inorganic membrane supports.

Piezoelectric/electrostrictive element

There is provided a piezoelectric/electrostrictive element 1 comprising a piezoelectric/electrostrictive body 30 made of a piezoelectric/electrostrictive ceramic composition containing Pb(Ni 1/3 Nb 2/3 )O 3 —PbTiO 3 —PbZrO 3 ternary solid solution system composition as the main components, and an electrode disposed on the piezoelectric/electrostrictive body, wherein the ternary solid solution system composition is represented by the following composition formula: (Pb 1-x Sr x ) α {(Ti 1-y Zr y ) a (Ni β/3 Nb 2/3 ) b (Al γ/2 Nb 1/2 ) c }O 3 (where 0.005≦x≦0.03, 0.45≦y≦0.54, 0.58≦a≦0.91, 0.07≦b≦0.36, 0.02≦c≦0.08, 0.97≦α≦1.03, 0.97≦β≦1.03, 0.97≦γ≦1.03, and (a+b+c=1.000)).

Process for producing zinc oxide varistor

A process for producing zinc oxide varistors possessed a property of breakdown voltage (V1mA) ranging from 230 to 1,730 V/mm is to perform the doping of zinc oxide and the sintering of zinc oxide grains with a high-impedance sintered powder through two independent procedures, so that the doped zinc oxide and the high-impedance sintered powder are well mixed in a predetermined ratio and then used to make the zinc oxide varistors through conventional technology by low-temperature sintering (lower than 900° C.); the resultant zinc oxide varistors may use pure silver as inner electrode and particularly possess breakdown voltage ranging from 230 to 1,730 V/mm.

Corrosion-resistant member for semiconductor manufacturing apparatus and method for manufacturing the same

A mixed powder was prepared by weighing Yb 2 O 3 and SrCO 3 in such a way that the molar ratio became 1:1. The resulting mixed powder was subjected to uniaxial pressure forming, so as to produce a disc-shaped compact. The compact was heat-treated in an air atmosphere, so that a complex oxide was synthesized. The resulting complex oxide was pulverized. After the pulverization, a slurry was taken out and was dried in a nitrogen gas stream, so as to produce a synthesized powder material. The resulting synthesized powder material was subjected to uniaxial pressure forming, so as to produce a disc-shaped compact. The resulting compact was fired by a hot-press method, so as to obtain a corrosion-resistant member for semiconductor manufacturing apparatus. The resulting corrosion-resistant member was made from a SrYb 2 O 4 .

Process for preparing high-purity magnesium hydroxide and magnesium oxide

A process for preparing magnesium compounds by precipitation, in which an aqueous solution or suspension of a magnesium compound is mixed with a precipitant and the corresponding magnesium compound is precipitated wherein the aqueous solution or suspension of a magnesium compound is obtained by reaction of an organomagnesium compound with an aldehyde or a ketone or another electrophile and subsequent aqueous workup of the reaction mixture at a pH of at most 10 or from a magnesium salt with a maximum calcium content and/or potassium content of 200 ppm, based on the magnesium salt used.

Dielectric composition and ceramic electronic component including the same

There is provided a dielectric composition including: a base powder; a first accessory component including a content (x) of 0.1 to 1.0 at % of an oxide or a carbonate including transition metals, based on 100 moles of the base powder; a second accessory component including a content (y) of 0.01 to 5.0 at % of an oxide or a carbonate including a fixed valence acceptor element, based on 100 moles of the base powder; a third accessory component including an oxide or a carbonate including a donor element; and a fourth accessory component including a sintering aid.

Solid electrolyte material and lithium battery

A main object of the present invention is to provide a Li—La—Zr—O-based solid electrolyte material having favorable denseness. The present invention solves the problem by providing a solid electrolyte material including Li, La, Zr, Al, Si and O, having a garnet structure, and being a sintered body.

Refractory powder comprising coated mullite grains

A powder is disclosed having a coarse fraction representing more than 60% and less than 85% of the powder, as a weight percentage on the basis of the oxides, and that is constituted of particles having a size greater than or equal to 50 μm, referred to as “coarse particles”, the powder comprising at least 5% of coated grains having a size greater than or equal to 50 μm, as a weight percentage on the basis of the oxides of the powder, and a fine fraction, forming the balance to 100% as a weight percentage on the basis of the oxides, constituted of particles having a size of less than 50 μm, referred to as “matrix particles”. The powder can be applied in combustion chambers in which the temperature may reach 1400° C.

Oxide ceramics sintered compact and method of manufacturing the same

An oxide ceramics sintered compact comprises three kinds of phases of cordierite, mullite, and sapphirine as crystal phases is characterized in that, with a sum of contents of MgO, Al 2 O 3 , and SiO 2 being 100 mass %, it contains MgO of not less than 12 mass % and 14 mass % or less, Al 2 O 3 of not less than 34 mass % and 39 mass % or less, and SiO 2 of not less than 47 mass % and 51 mass % or less, and a content of a substance except MgO, Al 2 O 3 , and SiO 2 is less than 1.5 mass % of the whole sintered compact.

Methods of consolidating radioactive containing materials by hot isostatic pressing

The present disclosure relates to a method of consolidating a calcine comprising radioactive material, the method comprising mixing 60-80% (by weight) of a radionuclide containing calcine with at least one non-radioactive additive, such as an oxide, and hot isostatic pressing the mixture to form a stable monolith of glass/ceramic. In one embodiment, the ratio of radionuclide containing calcine to additives is about 80:20 by weight, wherein the non-radioactive additive comprises oxides such as BaO, CaO, Al 2 O 3 , TiO 2 , SiO 2 and others, that combine with the waste elements and compounds to form a ceramic mineral or glass/ceramic material, after hot isostatic pressing. Non-limiting examples of mineral phases that may be formed are: hollandite (BaAl 2 Ti 6 O 16 ), zirconolite (CaZrThO 7 ), and perovskite (CaTiO 3 ).

Method of forming ceramic coatings and ceramic coatings and structures formed thereby

A method of forming a ceramic coating, the resulting ceramic coating, and structures produced by forming the ceramic coating on a ceramic fiber shape. The method includes forming an aqueous mixture containing water, an alumino-silicate precursor, and a dispersion of a ceramic fiber material. The alumino-silicate precursor contains a colloidal suspension of silica particles, silica fume particles, and micron-sized and submicron-sized alumina particles. The ceramic fiber material includes micron-sized and submicron-sized ceramic fibers. The aqueous mixture is applied to a surface of a ceramic fiber shape, after which the aqueous mixture is cured to form a ceramic coating that contains the ceramic fiber material dispersed in an alumino-silicate matrix.

Process for obtaining nanocrystalline corundum from natural or synthetic alums

The present invention relates to a process for obtaining nanocrystalline corundum, characterised in that it comprises a first step of thermal treatment of the raw material used in the process at standard pressure, to a temperature greater than that of the last endothermic accident of the differential thermal analysis record of the raw material, performed to 925° C.; and a second step of fast cooling from the maximum temperature reached in the preceding step to room temperature. Moreover, the present invention relates to the nanocrystalline corundum obtainable from the process described, as well as to multiple uses of said corundum. Furthermore, this material may be disaggregated, for example by means of high-energy grinding, to produce a fine aggregate that may be used as an abrasive or as a functional load in plastic polymers or other types of materials.

Sintered body, sputtering target and molding die, and process for producing sintered body employing the same

Provided is an apparatus that includes a molding die for producing a sintered body. The molding die is configured for cold isostatic pressing and includes a knockdown mold frame comprised of plural frame members and a bottom plate provided in contact with the knockdown mold frame. An upper punch is provided to be movable along the inner surface of the knockdown mold frame. The frame members configured to be movable relative to each other to accommodate an expansion of a green body which takes place at the time of reducing the pressure after the completion of pressing.

Method for producing catalysts and catalysts thereof

The invention relates to a process to produce catalysts by powder injection moulding and the catalysts thereof, wherein the catalysts are made by preparing a ceramic formulation with temperature controlled rheological properties comprising catalytic components, heating the powder formulation up to at least the fluid state transition temperature, shaping a sample by injecting the fluid powder formulation into an injection mould followed by cooling the injected powder formulation below the fluid state transition temperature, de-binding the shaped sample, and sintering the shaped sample to form a ceramic catalyst. Alternatively the ceramic structure may be formed initially followed by a coating of the ceramic structure by one or more catalytic compounds.

Reactor Components

The present disclosure relates to insulation components and their use, e.g., in regenerative reactors. Specifically, a process and apparatus for managing temperatures from oxidation and pyrolysis reactions in a reactor, e.g., a thermally regeneratating reactor, such as a regenerative, reverse-flow reactor is described in relation to the various reactor components.

Process for preparing cellular inorganic monolithic materials and uses of these materials

A process is provided for preparing an inorganic material in the form of an alveolar monolith of a silica matrix where the monolith includes interconnected macropores. The process includes at least one step of mineralizing an oil-in-water emulsion formed from droplets of an oily phase dispersed in a continuous aqueous phase and in which colloidal solid particles are present at the interface formed between the continuous aqueous phase and the dispersed droplets of oily phase. Such materials obtained according to this process may be used, especially for separative chemistry and filtration, for performing chemical reactions catalysed in heterogeneous phase, as thermal or phonic insulators, or as templates for manufacturing controlled-porosity carbon skeletons.

Alumina sintered body, abrasive grains, and grindstone

Provided are an alumina sintered compact containing a titanium compound and an iron compound, wherein FeTiAlO 5 grains exist in the grain boundary of the alumina grains and the mean grain size of the FeTiAlO 5 grains is from 3.4 to 7.0 μm; and an abrasive grain and a grain stone using the alumina sintered compact.

Solid oxide fuel cell

Provided is a solid oxide fuel cell having a service life of approximately 90,000 hours, a level required to encourage the widespread use of SOFC. The solid oxide fuel cell according to the present invention comprises a solid electrolyte layer, an oxygen electrode layer provide to one side of the solid electrolyte layer, and a fuel electrode layer provide to the other side of the solid electrolyte layer. The oxygen electrode layer is made from a material including iron or manganese, the solid electrolyte layer is made from a scandia-stabilized zirconia electrolyte material containing alumina, and the solid electrolyte layer has a lanthanoid oxide and/or yttria dissolved therein.

Alumina sintered body, abrasive grains, and grindstone

Provided are an alumina sintered compact containing a titanium compound and an iron compound, wherein the total amount of the TiO 2 -equivalent content of the titanium compound, the Fe 2 O 3 -equivalent content of the iron compound and the alumina content is at least 98% by mass, the total amount of the TiO 2 -equivalent content of the titanium compound and the Fe 2 O 3 -equivalent content of the iron compound is from 5 to 13% by mass, and the ratio by mass of the TiO 2 -equivalent content of the titanium compound to the Fe 2 O 3 -equivalent content of the iron compound (TiO 2 /Fe 2 O 3 ) is from 0.85/1.15 to 1.15/0.85; and an abrasive grain and a grain stone using the alumina sintered compact.

Piezoelectric porcelain composition

Provided is a Sr 2-x Ca x NaNb 5 O 15 type piezoelectric ceramic composition wherein the inhibition of cracking and an improvement in the piezoelectric characteristics are attained by improving the composition uniformity and the microstructure uniformity. In the basic Sr 2-x Ca x NaNb 5 O 15 composition, the (Sr, Ca)/Na ratio is changed, whereby the occupancies of Sr, Ca and Na in lattices which constitute the tungsten-bronze type structure and into which Sr, Ca, and Na can enter are reduced to facilitate the entrance of Sr into the lattices and thus inhibit the formation of a secondary phase. Further, a predetermined amount of Al and/or Si is added to lower the sintering temperature and to make the microstructure uniform. Additionally, a predetermined amount of Mn is added to make the polarization easy.

Oxide sintered body and sputtering target

Provided are an oxide sintered body and a sputtering target which are suitable for use in producing an oxide semiconductor film for display devices and combine high electroconductivity with a high relative density and with which it is possible to form an oxide semiconductor film having a high carrier mobility. In particular, even when used in production by a direct-current sputtering method, the oxide sintered body and the sputtering target are less apt to generate nodules and have excellent direct-current discharge stability which renders long-term stable discharge possible. This oxide sintered body is an oxide sintered body obtained by mixing zinc oxide, tin oxide, and an oxide of at least one metal (M metal) selected from the group consisting of Al, Hf, Ni, Si, Ga, In, and Ta, and sintering the mixture, the oxide sintered body having a Vickers hardness of 400 Hv or higher.

Alumina composite, method for manufacturing alumina composite, and polymer composition containing alumina composite

For the purpose of producing an alumina composite in which the integrity between alumina and an inorganic material is further improved, a dispersion liquid preparation step, a solidification step and a burning step are performed, wherein the dispersion liquid preparation step comprises preparing a dispersion liquid in which an inorganic material such as a carbon material is homogeneously dispersed in an alumina raw material solution having an organic additive dissolved therein, the solidification step comprises drying the dispersion liquid to produce a solid raw material, and burning step comprises burning the solid raw material in a non-acidic atmosphere while contacting hydrogen chloride with the solid raw material. In this manner, an alumina composite can be produced, in which at least a portion of an inorganic material such as a carbon material is embedded in the inside of each of α-alumina single crystal particles the constitute alumina particles.

Method for manufacturing refractory grains containing chromium(iii) oxide

A method for manufacturing sintered refractory grains containing Cr 2 CO 3 from an initial refractory product including one or more chromium that includes: A) optionally, \crushing the starting refractory material; B) grinding a filler, comprising said starting refractory material in a liquid medium to obtain a suspension of particles of said starting refractory material; C) preparing a starting mixture including at least 1 wt % of particles of the suspension obtained during the preceding step; D) shaping the starting mixture into the shape of a preform; E) optionally drying the preform obtained in step D); F) sintering the preform so as to obtain a sintered body; G) optionally grinding the sintered body; and H) the optional selection by particle size.

Polycrystalline Cubic Boron Nitride (PcBN) Body Made With Distinct Layers of PcBN

A polycrystalline cubic boron nitride (PcBN) is fabricated using a process of overlaying layers of cubic boron nitride (cBN) powder, where the layers have cBN mixed with various concentrations of a ceramic. The process of fabricating the PcBN includes depositing, in a refractory capsule, a carbide, a cubic boron nitride (cBN), and a mixture of cBN and a ceramic, then applying a high pressure and high temperature (HPHT) to the content of the refractory capsule. During the depositing step of the process, the concentration of cBN in the mixture of the cBN and ceramic is lower than the concentration of cBN that is in the layer below it. Upon applying HPHT, the carbide first diffuses across the cBN layer, and then diffuses across the layer with the mixture of the cBN and ceramic. After HPHT ends and the content of the refractory capsule cools, the process yields a PcBN having layers with various concentrations of cBN, and at least one cBN layer with a ceramic material.

Calcium titanate containing mold compositions and methods for casting titanium and titanium aluminide alloys

The disclosure relates generally to mold compositions comprising calcium aluminate and calcium titanate. The disclosure also relates to methods of molding and the articles so molded using the mold compositions. More specifically, the disclosure relates to calcium aluminate/calcium titanate mold compositions and methods for casting titanium-containing articles, and the titanium-containing articles so molded.

Ceramic filter and methods for manufacturing and using same

A process for manufacturing a ceramic filter includes mixing silicon, yttrium oxide-doped zirconia, magnesium-aluminum spinel, silicon nitride, a pore-forming material, and a binder to form a ceramic precursor; extruding the ceramic precursor into a generally honeycomb shaped monolithic filter precursor or into a single filter tube precursor; drying the filter precursor or filter tube precursor to form a dried ceramic precursor; heating the dried ceramic precursor to remove the binder; and sintering to form the silicon nitride ceramic filter.

Use of monazite or xenotime solution precursors to increase the density and shear strength of oxide composites

Aqueous precursor solutions are described that comprise at least one monazite-based material precursor, at least one xenotime-based material precursor or a combination thereof; and a plurality of fine suspended particles of an oxide material. Contemplated oxide composites, as described herein, comprise a plurality of fibers surrounded by at least one monazite or xenotime-based material, wherein the oxide composite has nearly a fully dense matrix. Contemplated embodiments disclosed herein provides a method for producing an oxide composite with nearly fully dense matrix and with all fibers surrounded by a monazite- or xenotime-based material that prevents embrittlement at temperatures at least as high as 1200° C. Oxide composites are described that contain a plurality of fibers, a matrix containing at least one or more oxide materials, and at least one monazite-based material, xenotime-based material or combination thereof, wherein the monazite-based or xenotime-based material is formed from the aqueous precursor solutions disclosed herein. Contemplated methods of production include: a) providing a composite comprising oxide-reinforcing fibers and a porous matrix of oxide materials, and b) infiltrating the porosity in the matrix with a solution that contains precursors for at least one monazite-based material, at least one xenotime-based material or a combination thereof; and c) heat treating the composite to convert the precursors to monazite, xenotime, or combinations thereof.

Honeycomb structure

A honeycomb structure 100 has a plurality of flow paths 110 a and 110 b which are partitioned by partition walls 120 and are substantially parallel to each other; and one end of the flow path 110 a is plugged by a plugging part 130 at one end surface 100 a of the honeycomb structure 100 , and one end of the flow path 110 b is plugged by a plugging part 130 at the other end surface 100 b of the honeycomb structure 100 , wherein, in an image of the partition walls 120 obtained by X-ray CT measurement, when the number of communicating holes detected when resolution of the image is 1.5 μm/pixel is defined as X, and the number of communicating holes detected when resolution of the image is 2.5 μam/pixel is defined as Y, Y/X is 0.58 or more.

White emitting light source and luminescent material

The invention relates to a white emitting light source with an improved luminescent material of the formula (AEN2/3)*b(MN)*c(SiN4/3)*d1CeO3/2*d2 EuO*xSiO2*yAlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc with d1>10*d2. In combination with a UV to blue light generating device this material leads to an improved light quality and stability, especially an improved temperature stability for a wide range of applications.

Compositions and methods for converting hazardous waste glass into non-hazardous products

The present invention provides compositions and methods for converting hazardous waste glass into safe and usable material. In particular, the present invention provides compositions and methods for producing ceramic products from toxic-metal-containing waste glass, thereby safely encapsulating the metals and other hazardous components within the ceramic products.

Alkali niobate-based piezoelectric material and a method for making the same

An alkali niobate-based piezoelectric material having the general formula {(K 1-a Na a ) 1-b Li b }(Nb 1-c-d Ta c Sb d )O 3 +x mol % Ba n TiO 3 +y mol % CuO, where 0≦a≦0.9, 0≦b≦0.3, 0<c≦0.5, 0≦d≦0.1, 0.5≦x≦10.0, 0.1≦y≦8.0, and 0.9≦n≦1.2.

Joint of metal material and ceramic-carbon composite material, method for producing same, carbon material joint, jointing material for carbon material joint, and method for producing carbon material joint

Provided are a joint of a metal material and a ceramic-carbon composite material which can be used at high temperatures, a method for producing the same, a novel carbon material joint, a jointing material for a carbon material joint, and a method for producing a carbon joint. A joint 6 of a metal material 4 and a ceramic-carbon composite material 1 is a joint of a metal material 4 made of metal and a ceramic-carbon composite material 1. The ceramic-carbon composite material 1 includes a plurality of carbon particles 2 and a ceramic portion 3 made of ceramic. The ceramic portion 3 is formed among the plurality of carbon particles 2. The metal material 4 and the ceramic-carbon composite material 1 are joined through a joining layer 5. The joining layer 5 contains a carbide of the metal and the ceramic.

Method for producing silicon carbide-carbon composite

Provided is a novel method for producing a silicon carbide-carbon composite. A green body containing a carbonaceous material 2 having silicon nitride attached to a surface thereof is fired to obtain a silicon carbide-carbon composite 1.

REFRACTORY COMPOSITIONS AND IN SITU ANTI-OXIDATION BARRIER LAYERS

A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques. When contacted by molten metal, the molten metal penetrates into the refractory material, wetting the coarse-grain refractory particles, and forming a refractory-metal composite barrier layer that decreases or blocks oxygen transport through the refractory lining. 123-. (canceled)25. The refractory composition of claim 24 , comprising claim 24 , in percent by total mass of the refractory composition:at least 50.0% coarse-grain refractory particles; andat least 25.0% low-magnesia oxide, fine-grain refractory particles.26. The refractory composition of claim 24 , wherein the coarse-grain refractory particles are essentially free of silica.27. The refractory composition of claim 24 , wherein the composition is essentially free of iron oxide.28. The refractory composition of claim 24 , wherein the coarse-grain refractory particles are essentially free of calcium oxide claim 24 , olivine claim 24 , and silica.29. The refractory composition of claim 24 , wherein the coarse-grain refractory particles comprise alumina particles having a particle size of at least 300 micrometers (+48 mesh).30. The refractory composition of claim 24 , comprising claim 24 , in percent by total mass of the refractory ...

DIELECTRIC CERAMIC COMPOSITION AND COMPOSITE CERAMIC STRUCTURE

Barium titanate (BaTiO) and barium zirconate (BaZrO) are made into a solid solution at a predetermined ratio. Specifically, a dielectric ceramic composition is represented by a basic composition (BaTiO)(BaZrO)(in the formula, X satisfies 0.70≦X≦0.95). More preferably, X satisfies 0.73≦X≦0.90 in this range. Such a dielectric ceramic composition may be integrated with alumina to form a composite ceramic structure. 1. A dielectric ceramic composition represented by a basic composition (BaTiO)(BaZrO)(in the formula , X satisfies 0.70≦X≦0.95).2. The dielectric ceramic composition according to claim 1 , being a solid solution of BaTiOand BaZrO.3. The dielectric ceramic composition according to claim 1 , wherein the X satisfies 0.73≦X≦0.90.4. The dielectric ceramic composition according to claim 1 , having an average crystal grain size of 3 μm or less.5. The dielectric ceramic composition according to claim 1 , having a relative density of 97% or more.6. The dielectric ceramic composition according to claim 1 , having a withstand voltage of 30 kV/mm or more.7. The dielectric ceramic composition according to claim 1 , having a relative dielectric constant of 43 or more and 170 or less.8. The dielectric ceramic composition according to claim 1 , having a thermal expansion coefficient of 7.8 ppm/K or more and 9.1 ppm/K or less.9. A composite ceramic structure wherein the dielectric ceramic composition according to and alumina are integrated. 1. Field of the InventionThe present invention relates to a dielectric ceramic composition and a composite ceramic structure.2. Description of the Related ArtDevices by utilizing creeping discharge, e.g., a creeping discharge ozonizer, have been known previously. For example, Patent Literature 1 discloses a creeping discharge element in which a linear discharge electrode is disposed on an inside surface of alumina ceramics (insulator) formed into a cylindrical shape and a sheet-shaped induction electrode is disposed in the inside or on an ...

Dielectric ceramic composition and composite ceramic structure

Strontium titanate (SrTiO 3 ) and barium zirconate (BaZrO 3 ) are made into a solid solution at a predetermined ratio. Specifically, a dielectric ceramic composition is represented by a basic composition (SrTiO 3 ) (1-x) (BaZrO 3 ) x (in the formula, X satisfies 0.63≦X≦0.95). More preferably, X satisfies 0.67≦X≦0.90 in this range. Such a dielectric ceramic composition may be integrated with alumina to form a composite ceramic structure.

LIGHT-TRANSMITTING CERAMIC SINTERED BODY AND METHOD FOR PRODUCING SAME

The present invention relates to a light-transmitting ceramic sintered body which contains air voids having pore diameters of 1 μm or more but less than 5 μm at a density within the range of from 10 voids/mmto 4,000 voids/mm(inclusive), while having a closed porosity of from 0.01% by volume to 1.05% by volume (inclusive). With respect to this light-transmitting ceramic sintered body, a test piece having a thickness of 1.90 mm has an average transmittance of 70% or more in the visible spectrum wavelength range of 500-900 nm, and the test piece having a thickness of 1.90 mm has a sharpness of 60% or more at a comb width of 0.5 mm. 1. A light-transmitting ceramic sintered body containing air bubbles each having a pore size of 1 μm or more and less than 5 μm in an amount of 10 bubbles/mmor more and 4 ,000 bubbles/mmor less , and having a closed porosity of 0.01 vol % or more and 1.05 vol % or less; andhaving an average transmittance of a test specimen of the light-transmitting ceramic sintered body having a thickness of 1.90 mm of 70% or more with respect to a visible spectrum with a wavelength of 500 to 900 nm, and a clarity in a comb width of 0.5 mm of a test specimen of the light-transmitting ceramic sintered body having a thickness of 1.90 mm of 60% or more.2. A light-transmitting ceramic sintered body containing air bubbles each having a pore size of 1 μm or more and less than 5 μm in an amount of 10 bubbles/mmor more and 4 ,000 bubbles/mmor less , and having a closed porosity of 0.01 vol % or more and 1.05 vol % or less; andhaving an average transmittance of a test specimen of the light-transmitting ceramic sintered body having a thickness of 0.80 mm of 74% or more with respect to a visible spectrum with a wavelength of 500 to 900 nm, and a clarity in a comb width of 0.5 mm of a test specimen of the light-transmitting ceramic sintered body having a thickness of 0.80 mm of 75% or more.3. A light-transmitting ceramic sintered body containing air bubbles each having ...

Monolithic base and production method therefor

The monolithic base is a porous alumina body that includes pores and that is configured by alumina particles as an aggregate and an oxide phase as a binding material. The alumina particles include microscopic alumina particles having a particle diameter of greater than or equal to 0.5 μm and less than or equal to 5 μm and coarse alumina particles having a particle diameter of greater than 5 μm. The number of microscopic alumina particles that are encapsulated in the oxide phase is greater than or equal to 50% of the total number of microscopic alumina particles and coarse alumina particles.

A NEW MOLYBDENUM SILICIDE BASED COMPOSITION

The present disclosure relates to a molybdenum silicide based composition comprising aluminum oxide (AlO) and to the use thereof in high temperature applications. 1. A molybdenum-silicide based composition comprising:{'sub': 2', '3', '1-x', 'x', '2', '2', '3, 'AlOand 1 to 7 wt % bentonite and balance MoCrSiand wherein x is 0.05-0.25, wherein AlOis present in the amount of from 0.01 to 0.06 wt %.'}2. The molybdenum-silicide based composition according to claim 1 , wherein the bentonite is present in the amount of 2 to 6 wt %.3. The molybdenum-silicide based composition according to claim 1 , wherein the bentonite is present in the amount of 2 to 5 wt %.4. The molybdenum-silicide based composition according to claim 1 , wherein x is 0.10 to 0.20.5. The molybdenum-silicide composition according to claim 1 , wherein x is 0.15 to 0.20.6. The molybdenum-silicide composition according to claim 1 , wherein AlOis in the amount of from 0.02 to 0.05 wt. %.7. A heating element comprising a sintered molybdenum-silicide based compound which has been manufactured from the molybdenum-silicide based composition according to .8. A furnace comprising an object containing a sintered molybdenum-silicide based compound which has been manufactured from the molybdenum-silicide based composition according to .9. The molybdenum-silicide based composition according to claim 2 , wherein x is 0.10 to 0.20.10. The molybdenum-silicide composition according to claim 9 , wherein AlOis in the amount of from 0.02 to 0.05 wt. %.11. The molybdenum-silicide composition according to claim 2 , wherein x is 0.15 to 0.20.12. The molybdenum-silicide composition according to claim 3 , wherein x is 0.15 to 0.20.13. The molybdenum-silicide composition according to claim 12 , wherein AlOis in the amount of from 0.02 to 0.05 wt. %.14. The molybdenum-silicide composition according to claim 3 , wherein AlOis in the amount of from 0.02 to 0.05 wt. %.15. The molybdenum-silicide composition according to claim 4 , ...

CUTTING TOOL MADE OF CUBIC BORON NITRIDE-BASED SINTERED MATERIAL

A cutting tool made of cubic boron nitride-based sintered material that exhibits excellent chipping resistance and fracturing resistance in the intermittent cutting work on high hardness steel is provided. In the cutting tool, the average size of the cubic boron nitride particles is 0.5 to 8 μm. A portion of the cubic boron nitride particles are coated with aluminum oxide films having an average thickness of 10 to 90 nm on surfaces thereof, and a rift is partially formed in the aluminum oxide film. The average rift formation ratio satisfies the formula 0.02≦h/H≦0.08, wherein h is a breadth of the rift of the aluminum oxide film and H is a girth of the particle of cubic boron nitride. 1. A cutting tool made of cubic boron nitride-based sintered material , comprising:cubic boron nitride particles as a hard phase component, whereinan average size of the cubic boron nitride particles is in a range of 0.5 to 8 μm,a portion of each of the cubic boron nitride particles is coated with aluminum oxide film having an average thickness of 10 to 90 nm on surfaces thereof, anda rift is partially formed in the aluminum oxide film.2. The cutting tool made of cubic boron nitride-based sintered material according to claim 1 , wherein in a case of:observing an image of a cross section of the cubic boron nitride particles coated by the aluminum oxide film; andobtaining an average rift formation ratio to the aluminum oxide film formed along the surfaces of the coated cubic boron nitride particles,a formula 0.02≦h/H≦0.08 is satisfied, whereh is a breadth of the rift of the aluminum oxide film and H is a girth of the particle of cubic boron nitride.3. The cutting tool made of cubic boron-nitride based sintered material according to claim 1 , wherein in a case of obtaining a ratio of a number of the cubic boron nitride particles coated by the aluminum oxide film claim 1 , which have the average thickness of 10 to 90 nm on surfaces thereof and the rift is partially formed in claim 1 , a ...

LITHIUM STUFFED GARNET SETTER PLATES FOR SOLID ELECTROLYTE FABRICATION

Setter plates are fabricated from Li-stuffed garnet materials having the same, or substantially similar, compositions as a garnet Li-stuffed solid electrolyte. The Li-stuffed garnet setter plates, set forth herein, reduce the evaporation of Li during a sintering treatment step and/or reduce the loss of Li caused by diffusion out of the sintering electrolyte. Li-stuffed garnet setter plates, set forth herein, maintain compositional control over the solid electrolyte during sintering when, upon heating, lithium is prone to diffuse out of the solid electrolyte. 1118-. (canceled)119. A slurry comprising:{'sub': A', 'B', 'C', 'D', 'E', 'F, 'lithium-stuffed garnet characterized by the formula LiLaM′M″ZrO, wherein 4 Подробнее

Honeycomb structural body

A honeycomb structural body has plural cell density sections having a cell density which is changed stepwise in a radial direction. A partition wall is formed between adjacent cell density sections. The cell density sections have a high cell density section having a maximum cell density, excepting an outermost cell density section formed at an outermost side, and a low cell density section having a minimum cell density, excepting an innermost cell density section formed at an innermost side. A relationship of V−Va≧Vb+Vs is satisfied, where V indicates a volume of the honeycomb structural body if the overall honeycomb structural body is composed of the high cell density section, Va indicates a volume of the high cell density section, Vb indicates a volume of the cell density section, and Vs indicates a volume of the boundary wall which separates the low cell density section from the cell density section formed immediately inside of the low cell density section.

INCREASED RESONANT FREQUENCY ALKALI-DOPED Y-PHASE HEXAGONAL FERRITES

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material, such as Y-phase hexagonal ferrite material, and methods of manufacturing. In some embodiments, sodium or potassium can be added into the crystal structure of the hexagonal ferrite material in order to achieve improved resonant frequencies in the range of 500 MHz to 1 GHz useful for radiofrequency applications. 1. (canceled)2. A method for increasing the resonant frequency of a hexagonal ferrite material , the method comprising:providing a Y phase hexagonal ferrite material having a strontium site and a crystal structure of an intergrowth between a magnetoplumbite and a spinel crystal structure;doping the Y phase hexagonal ferrite material with sodium, potassium, or other univalent alkali metal on the strontium site; anddoping the Y phase hexagonal ferrite material with scandium or indium for charge compensating with the sodium, potassium, or other univalent alkali metal to form a doped Y phase hexagonal ferrite material.3. The method of claim 2 , wherein the Y phase hexagonal ferrite material includes Sr claim 2 , a metal claim 2 , Fe claim 2 , and O.4. The method of claim 3 , wherein the metal is Co.5. The method of claim 3 , wherein aluminum is added into the crystal structure of the Y phase hexagonal ferrite material to replace the Fe.6. The method of claim 5 , wherein the doped Y phase hexagonal ferrite material has a composition SrCoFeAlOor Sr(K claim 5 ,Na)CoMFeAlO claim 5 , M being the scandium or the indium.7. The method of claim 6 , wherein the doped Y phase hexagonal ferrite material has the composition SrNaCoScFeAlOor SrNaCoScFeAlO.8. The method of claim 2 , wherein the indium or the scandium are located on a cobalt site of the Y phase hexagonal ferrite material.9. The method of claim 2 , further including adding silica into the crystal structure of the Y phase hexagonal ferrite material.10. The method of claim 2 , further including adding silicon into the ...

HONEYCOMB SHAPED POROUS CERAMIC BODY, MANUFACTURING METHOD FOR SAME, AND HONEYCOMB SHAPED CERAMIC SEPARATION MEMBRANE STRUCTURE

There are disclosed a honeycomb shaped porous ceramic body to manufacture a honeycomb shaped ceramic separation membrane structure in which a separation performance does not deteriorate under a higher operation pressure than before, a manufacturing method for the porous body, and a honeycomb shaped ceramic separation membrane structure. The honeycomb shaped ceramic separation membrane structure includes a honeycomb shaped substrate , an intermediate layer , an alumina surface layer , and a separation layer . The structure has the alumina surface layer on the intermediate layer , whereby even when the insides of the cells are pressurized, cracks are not easily generated in a porous body or the separation layer and the deterioration of the separation performance does not easily occur. 1. A honeycomb shaped porous ceramic body comprising:a honeycomb shaped substrate which has partition walls made of a porous ceramic material provided with a large number of pores and in which there are formed a plurality of cells to become through channels of a fluid passing through the porous ceramic body by the partition walls;an intermediate layer which is made of a porous ceramic material provided with a large number of pores and having an average pore diameter smaller than that of the surface of the substrate and which is disposed at the surface of the substrate; andan alumina-containing alumina surface layer at the outermost surface of the intermediate layer.2. The honeycomb shaped porous ceramic body according to claim 1 ,wherein the alumina surface layer is formed of alumina particles having particle diameters of 0.4 to 3 μm.3. The honeycomb shaped porous ceramic body according to claim 1 ,wherein the alumina surface layer includes a magnesium component.4. The honeycomb shaped porous ceramic body according to claim 2 ,wherein the alumina surface layer includes a magnesium component.5. The honeycomb shaped porous ceramic body according to claim 1 ,wherein the alumina surface ...

MOLD COMPOSITION COMPRISING A SUGAR COMPONENT

A moulding composition comprising at least one sugar component in a weight proportion of at least 20% in relation to the weight of the moulding composition, and at least one aggregate as well as a mould for a moulding process, wherein the mould is a compact three-dimensional structure made of the moulding composition, and a process for moulding a workpiece with the mould. 1. A moulding composition comprisingat least one sugar component in a weight proportion of at least 20%, in relation to the weight of the moulding composition, andat least one aggregate.2. A moulding composition according to claim 1 , wherein the at least one sugar component is selected from the group consisting of monosaccharides claim 1 , disaccharides claim 1 , oligosaccharides claim 1 , sugar alcohols derived from a monosaccharide claim 1 , a disaccharide or an oligosaccharide claim 1 , hydrates thereof and mixtures thereof.3. A moulding composition according to claim 1 , wherein the at least one sugar component is a compound of the general formula I{'br': None, 'sub': (n*a)', '(n*a*2)+2b-2c', '(n*a)-c, 'CHO\u2003\u2003(I),'} n is 1 to 10, preferably 1 or 2,', 'a is 4, 5 or 6,', 'b is 0 or 1, and', 'c is n−1 or n,, 'wherein'}a hydrate of a compound of general formula I or a mixture of at least two compounds of general formula I and/or hydrates thereof.4. A moulding composition according to claim 1 , wherein the at least one sugar component is selected from the group consisting of sucrose claim 1 , D-fructose claim 1 , D-glucose claim 1 , D-trehalose claim 1 , cyclodextrins claim 1 , erythritol claim 1 , isomalt claim 1 , lactitol claim 1 , maltitol claim 1 , mannitol claim 1 , xylitol and mixtures thereof claim 1 , particularly preferably D-trehalose claim 1 , isomalt claim 1 , erythritol claim 1 , lactitol claim 1 , mannitol and eutectic mixtures of sucrose and D-glucose.5. A moulding composition according to claim 1 , wherein the at least one sugar component has a melting point and a ...

MONOLITHIC SEPARATION MEMBRANE STRUCTURE

A monolithic separation membrane structure () comprises a base material layer () and a first filtration layer (). The first filtration layer () contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of titania. The thickness of the first filtration layer () is less than 150 micrometers. 1. A monolithic separation membrane structure comprising:a base material layer composed of a porous material and including a plurality of through holes, anda tubular first filtration layer formed on an inner surface of the plurality of through holes, whereinthe first filtration layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of titania, andthe thickness of the first filtration layer is less than 150 micrometers.2. The monolithic separation membrane structure according to claim 1 , further comprising:a tubular second filtration layer formed on an inner surface of the first filtration layer, whereinthe second filtration layer contains an aggregate material having a principal component of titania.3. The monolithic separation membrane structure according to claim 1 , whereinthe base material layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of glass.4. The monolithic separation membrane structure according to claim 3 , whereinan average pore diameter of the first filtration layer is smaller than an average pore diameter of the base material layer.5. The monolithic separation membrane structure according to claim 2 , whereinthe base material layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of glass. The present invention relates to a monolithic separation membrane structure.A monolithic separation membrane structure is known which includes a base material layer that has a plurality ...

Catalytic extruded, solid honeycomb body

An extruded, solid honeycomb body comprises a copper-promoted, small pore, crystalline molecular sieve catalyst for converting oxides of nitrogen in the presence of a reducing agent, wherein the crystalline molecular sieve contains a maximum ring size of eight tetrahedral atoms, which extruded, solid honeycomb body comprising: 20-50% by weight matrix component comprising diatomaceous earth, wherein 2-20 weight % of the extruded, solid honeycomb body is diatomaceous earth; 80-50% by weight of the small pore, crystalline molecular sieve ion-exchanged with copper; and 0-10% by weight of inorganic fibres.

Gas nozzle, manufacturing method of gas nozzle, and plasma treatment device

A gas nozzle according to the present disclosure includes a supply hole having a tubular shape and configured to guide a gas and an injection hole connecting to the supply hole. The gas nozzle configured to inject the gas from the injection hole is made from ceramics or single crystal including an oxide, a fluoride, or an oxyfluoride of a rare earth element or an yttrium aluminum composite oxide as a primary component. An arithmetic mean roughness Ra of an inner circumferential surface forming the supply hole is smaller on an outflow side than on an inflow side of the gas.

CASTABLE REFRACTORY COMPOSITION

A castable refractory composition may include from 5% to 95% by weight of alumina, aluminosilicate, or mixtures thereof; from 0.5% to 1.5% by weight alkaline earth metal oxide and/or hydroxide, and 0.1% to 5% by weight of silica having a surface area of at least about 10 m/g. The refractory composition may include no more than 0.5% by weight of cementitious binder. The refractory composition may release less than 25 cmof hydrogen gas per kilogram of castable refractory composition upon addition of water. The refractory compositions may set on addition of water. 118-. (canceled)19. A castable refractory composition comprising:5% to 95% by weight of alumina, aiuminosilicate, or mixtures thereof;from 0.5% to 1.5% by weight alkaline earth metal oxide and/or hydroxide; and{'sup': '2', '0.1% to 5% by weight of silica having a surface area of at least about 10 m/g;'}wherein the refractory composition includes no more than 0.5% by weight of cementitious binder;{'sup': '3', 'wherein the refractory composition releases less than 25 cmof hydrogen gas per kilogram of castable refractory composition upon addition of water; and'}wherein the refractory compositions sets on addition of water.201. A castable refractory composition according to claim , further 0.01% to 3% by weight solid powdered organic additives ,211. A castable refractory composition according to claim , further comprising 0.01% to 3% by weight soluble mineral additives.221. A castable refractory composition according to claim , further comprising up to about 1% by weight of metallic additives.231. A castable refractory composition according to claim , further comprising up to about 5% by weight of an additive or combination of additives which suppress or prevent the oxidation of carbon.241. A castable refractory composition according to claim , further comprising up to 0.5% by weight of organic fibers.251. A castable refractory composition according to claim , wherein the alumina , aluminosilicate or mixture ...

OXIDE BASED CERAMIC MATRIX COMPOSITES

A method of making a ceramic matrix composites (CMC) having superior properties at high temperatures. The CMC can include a sol gel mixture mixed or blended metal oxide particles. The sol-gel mixture can be an aqueous colloidal suspension of a metal oxide, preferably from about 10 wt % to about 25 wt % of the metal oxide, containing a metal oxide such as alumina (AlO), silica (SiO) or alumina-coated silica. The mixture can be infiltrated into a ceramic fiber, gelled, dried and sintered to form the CMC of the present teachings. 1. A method of forming a ceramic composite , comprising:mixing a water based mixture that does not have a polymer by mixing (1) alumina particles having a size range of 0.1 to 1.0 micrometers, including submicron particles with (2) an aqueous colloidal suspension sol-gel having about 10 wt % to about 25 wt % of silica, alumina, or alumina coated silica, the sol-gel having particles having a size in a range of 4 to 150 nanometers wherein the formed mixture has 40 wt % to about 70 wt % sol-gel and about 30 wt % to about 60 wt % alumina particles;completely infiltrating a fabric consisting essentially of a ceramic fiber with the mixture of the sol-gel and the alumina particles;draping the fabric on a tool to form one or more layers of an infiltrated fabric into a shape;rigidifying the infiltrated fabric on the tool by curing the infiltrated fabric so that the infiltrated fabric maintains the shape after the tool is removed, wherein the curing the infiltrated fabric on the tool comprises autoclaving the infiltrated fabric while the infiltrated fabric is on the tool, and wherein the curing the infiltrated fabric includes subjecting the infiltrated fabric while placed on the tool to a vacuum bag cure to apply 30-100 psi at a temperature of about 350 degrees Fahrenheit;after rigidifying the infiltrated fabric in the shape, removing the tool from the infiltrated fabric and maintaining in the infiltrated fabric the shape; andheat treating the ...

ION BEAM SPUTTERING WITH ION ASSISTED DEPOSITION FOR COATINGS ON CHAMBER COMPONENTS

An article comprises a body and a conformal protective layer on at least one surface of the body. The conformal protective layer is a plasma resistant rare earth oxide film having a thickness of less than 1000 μm, wherein the plasma resistant rare earth oxide is selected from a group consisting of YF, ErAlO, ErAlO, and a ceramic compound comprising YAlOand a solid-solution of YO—ZrO. 1. An article comprising:a body; and{'sub': 3', '4', '2', '9', '3', '4', '2', '9', '2', '3', '2, 'a conformal protective layer on at least one surface of the body, wherein the conformal protective layer is a plasma resistant rare earth-containing film having a thickness of less than 1000 μm, wherein a porosity of the conformal protective layer is less than 1%, and wherein the plasma resistant rare earth-containing film is selected from a group consisting of YF, ErAlO, ErAlO, and a ceramic compound comprising YAlOand a solid-solution of YO—ZrO.'}2. The article of claim 1 , the conformal protective layer having been formed by ion beam sputtering with ion assisted deposition.3. The article of claim 1 , wherein the conformal protective layer has a thickness of 0.2-20 μm.4. The article of claim 1 , wherein the porosity of the conformal protective layer is below 0.1%.5. The article of claim 1 , wherein the plasma resistant rare earth-containing film comprises the ceramic compound comprising YAlOand the solid-solution of YO—ZrO claim 1 , wherein the ceramic compound has a composition of 40 mol % to less than 100 mol % of YO claim 1 , over 0 mol % to 60 mol % of ZrO claim 1 , and over 0 mol % to 9 mol % of AlO.6. The article of claim 1 , wherein the plasma resistant rare earth-containing film comprises the ceramic compound comprising YAlOand the solid-solution of YO—ZrO claim 1 , wherein the ceramic compound has a composition of 40-60 mol % of YO claim 1 , 31-50 mol % of ZrO claim 1 , and 10-20 mol % of AlO.7. The article of claim 1 , wherein the plasma resistant rare earth-containing film ...

ION BEAM SPUTTERING WITH ION ASSISTED DEPOSITION FOR COATINGS ON CHAMBER COMPONENTS

An article comprises a body and a conformal protective layer on at least one surface of the body. The conformal protective layer is a plasma resistant rare earth oxide film having a thickness of less than 1000 μm, wherein the plasma resistant rare earth oxide film is selected from a group consisting of an Er—Y composition, an Er—Al—Y composition, an Er—Y—Zr composition, and an Er—Al composition. 1. An article comprising:a body; anda conformal protective layer on at least one surface of the body, wherein the conformal protective layer is a plasma resistant rare earth oxide film having a thickness of less than 1000 μm, wherein a porosity of the conformal protective layer is less than 1%, and wherein the plasma resistant rare earth oxide film has a composition selected from a group consisting of an Er—Y oxide composition, an Er—Al—Y oxide composition, an Er—Y—Zr oxide composition, and an Er—Al oxide composition.2. The article of claim 1 , wherein the plasma resistant rare earth oxide film comprises the Er—Y composition claim 1 , and wherein the Er—Y oxide composition comprises 80 wt % ErOand 20 wt % YO.3. The article of claim 1 , wherein the plasma resistant rare earth oxide film comprises the Er—Al—Y composition claim 1 , and wherein the Er—Al—Y oxide composition comprises 70 wt % ErO claim 1 , 10 wt % AlO claim 1 , and 20 wt % YO.4. The article of claim 1 , wherein the plasma resistant rare earth oxide film comprises the Er—Y—Zr composition claim 1 , and wherein the Er—Y—Zr oxide composition comprises 70 wt % ErO claim 1 , 20 wt % YO claim 1 , and 10 wt % ZrO.5. The article of claim 1 , the conformal protective layer having been formed by ion beam sputtering with ion assisted deposition.6. The article of claim 1 , wherein the conformal protective layer has a thickness of 0.2-20 μm.7. The article of claim 1 , wherein a porosity of the conformal protective layer is below 0.1%.8. The article of claim 1 , further comprising:a second protective layer on the conformal ...

Plate-like alumina particle and a manufacturing method for the same

[Solving Means] The above problem is solved by providing a plate-like alumina particle including a step of firing an aluminum compound in the presence of a shape-controlling agent and a molybdenum compound serving as a fluxing agent. The above problem is solved also by providing a method for producing a plate-like alumina particle, the method including a step in which the aluminum compound and the molybdenum compound react with each other to form aluminum molybdate and a step in which the aluminum molybdate is decomposed to obtain the plate-like alumina particle.

LITHIUM-MIXED OXIDE PARTICLES ENCAPSULATED IN ALUMINUM OXIDE AND TITANIUM DIOXIDE, AND METHOD FOR USING SAME

Process for producing coated mixed lithium oxide particles, in which mixed lithium oxide particles and a mixture comprising aluminium oxide and titanium dioxide are subjected to dry mixing by means of a mixing unit having a specific power of 0.1-1 kW per kg of mixed lithium oxide particles and mixture used, in total, under shearing conditions. 115-. (canceled)16. A process for producing coated mixed lithium oxide particles , comprising dry mixing: a) mixed lithium oxide particles , and b) a mixture comprising aluminium oxide and titanium dioxide; using a mixing unit having a specific power of 0.1-1 kW per kg of mixed lithium oxide particles and mixture used , in total , under shearing conditions.17. The process of claim 16 , wherein the power of the mixing unit is 0.1-1000 kW.18. The process of claim 16 , wherein the volume of the mixing unit used is 11 to 2.5 m.19. The process of claim 16 , wherein the speed of the mixing tool is 10-30 ms.20. The process of claim 16 , wherein the duration of mixing is 0.1 to 120 minutes.21. The process of claim 16 , wherein the weight ratio of aluminium oxide to titanium dioxide is 10:90-90:10.22. The process of claim 16 , wherein aluminium oxide particles having a BET surface area of at least 115 m/g are used.23. The process of claim 16 , wherein the aluminium oxide particles are selected from the group consisting of γ- claim 16 , θ- claim 16 , δ-aluminium oxide and mixtures of these.24. The process of claim 16 , wherein titanium dioxide particles having a BET surface area of at least 40 m/g are used.25. The process of claim 16 , wherein the BET surface area of the aluminium oxide particles used is greater than that of the titanium dioxide particles used.26. The process of claim 16 , wherein the aluminium oxide particles and titanium dioxide particles are each in the form of aggregated primary particles.27. The process of claims 16 , wherein the mixed lithium oxide particles are selected from the group consisting of lithium-cobalt ...

MAGNETIC LINER

The disclosed technology regards a magnetic liner including a liner, a plurality of magnet bases each having a recess formed on the top surface thereof, and a plurality of magnets, each magnet received and secured within the recess of a magnet base. The magnet bases are inlaid within the liner, spaced apart so that no surface of any of the magnet bases is in contact with any surface of any other magnet base. The disclosed technology further regards a method of manufacturing a magnetic liner, including applying an adhesive about each of a plurality of magnet bases, and positioning the magnet bases in a press mold. A liner material is placed above the plurality of magnet bases, and heat and pressure are applied. Finally, one magnet is secured within each magnet base. 1. A magnetic liner comprising a liner , a plurality of magnet bases having a recess formed on the top surface thereof , and a plurality of magnets , each magnet received and secured within the recesses of the magnet bases so that the exposed face of the magnet is flush with the top surface of the magnet base when the magnet is seated within the magnet base;wherein the magnet bases are inlaid within the liner so that the body of each magnet base is supported and affixed within the liner, with a top surface of the magnet base exposed and flush with a bottom surface of the liner; andwherein the magnet bases are spaced apart within the liner so that no surface of any of the magnet bases is in contact with any surface of any other magnet base.2. The magnetic liner of claim 1 , wherein the liner fills the spaces between the magnet bases.3. The magnetic liner of claim 1 , wherein the magnet claim 1 , the recess of the magnet base and the magnet base are each circular in shape.4. The magnetic liner of claim 1 , wherein the pull force from the magnets and magnet bases is between about 500-700 lbs./ftof liner.5. The magnetic liner of claim 1 , wherein a surface area of the exposed potion of the magnet base is ...

Dielectric Ceramic Composition, Method for the Production and Use Thereof

A dielectric ceramic composition, a method for producing a dieelctric composition and the use of the dielectric composition are disclosed. In an embodiment a ceramic composition includes a main component with a quantity ratio Mg(1+x)(1−y)O3+xA(1+x)ySi(1−z)Dz and a remainder comprising contaminants, wherein 0.01×0.30, wherein 0.00≤y≤0.20, and wherein 0.00≤z≤1.00.

ANTIOXIDANTS IN GREEN CERAMIC BODIES CONTAINING VARIOUS OILS FOR IMPROVED FIRING

Green ceramic mixture for extruding into an extruded green body includes one or more inorganic components selected from the group consisting of ceramic ingredients, inorganic ceramic-forming ingredients, and combinations thereof, at least one mineral oil, and from about 0.01 wt % to about 0.45 wt % of an antioxidant based on a total weight of the inorganic component(s), by super addition. The mineral oil has a kinematic viscosity of ≥about 1.9 cSt at 100° C. The at least one antioxidant may have a degradation-rate peak temperature that is greater than the degradation-rate peak temperature of the at least one mineral oil. In some embodiments, the at least one mineral oil includes greater than about 20 wt % alkanes with greater than 20 carbons, based on a total weight of the at least one mineral oil. Methods of making an unfired extruded body using the batch mixture are also disclosed. 1. A method of making porous ceramic bodies , the method comprising:mixing at least one mineral oil, at least one antioxidant, and one or more ceramic ingredients or inorganic ceramic-forming ingredients to form a first batch mixture;extruding the first batch mixture to form a first green body;mixing at least one mineral oil, at least one antioxidant, and one or more ceramic ingredients or inorganic ceramic-forming ingredients to form a second batch mixture;extruding the second batch mixture to form a second green body;firing the first green honeycomb body in a kiln according to a first firing cycle for a first total firing time sufficient to produce a first porous ceramic body;firing the second green body in a kiln according to a second firing cycle for a second total firing time sufficient to produce a second porous ceramic body;wherein the first and second green bodies differ in composition, size, and/or geometry of the respective green body;wherein the amount of antioxidant included in each respective batch mixture is selected such that the first total firing time is the same as the ...

DECORATIVE CERAMIC ITEM

A decorative item is made of a ceramic material, where ceramic material includes a carbide phase and an oxide phase, the carbide phase being present in a percentage by volume comprised between 50 and 95% and the oxide phase being present in a percentage by volume comprised between 5 and 50%. The decorative item is manufactured by a method of powder metallurgy. 1. A decorative item made of comprising a ceramic material , said ceramic material including a carbide phase and a phase of aluminium oxide , the carbide phase being in a major proportion and having a percentage by volume comprised between 70 and 85% , wherein the oxide phase is in a minor proportion and present in a percentage by volume comprised between 15 and 30% , andwherein the carbide phase includes molybdenum carbide in a major proportion.2. (canceled)3. The item according to claim 1 , wherein said carbide phase is present in a percentage by volume comprised between 55 and 90% claim 1 , the oxide phase being present in a percentage by volume comprised between 10 and 45%.4. The item according to claim 1 , wherein said carbide phase includes niobium carbide or tungsten carbide in a minor proportion.5. The item according to claim 1 , wherein said carbide phase including molybdenum carbide in a major proportion is present in a percentage by volume comprised between 50 and 75% claim 1 , the oxide phase being present in a percentage by volume comprised between 25 and 50%.6. The item according to claim 1 , further comprising chromium oxide in a minor proportion.7. The item according to claim 3 , wherein said carbide phase is present in a percentage by volume comprised between 65 and 85 claim 3 , and said aluminium oxide phase is present in a percentage by volume comprised between 15 and 35%.8. The item according to claim 3 , further comprising chromium oxide.9. The item according to claim 8 , wherein said carbide phase is present in a percentage by volume comprised between 55 and 75% claim 8 , and said oxide ...

PERFORMANCE OF TECHNICAL CERAMICS

Disclosed herein are a ceramic particle comprising a ceramic core substrate and a conformal coating of a sintering aid film on a surface of the core substrate, wherein the conformal coating includes a plurality of distributed islands of the sintering aid film across the surface of the core substrate; methods for producing the ceramic particle by ALD or MLD; and methods of using the coated ceramic particles in additive manufacturing or in solid oxide fuel cells. In one example, the film may have a thickness of less than three nanometers. The disclosed ceramic particle may be non-reactive with water. 1. A ceramic particle comprising:a core substrate chosen from yttria-stabilized zirconia, partially stabilized zirconia, zirconium oxide, aluminum nitride, silicon nitride, silicon carbide, boron carbide, boron nitride, aluminum oxide, barium titanate, and cerium oxide, anda conformal coating of a sintering aid film on a surface of the core substrate, wherein the conformal coating of the sintering aid film comprises a plurality of distributed islands of the sintering aid film across the surface of the core substrate.2. The ceramic particle of claim 1 , wherein less than 40 percent of the surface of the core substrate is covered by the plurality of distributed islands of the sintering aid film claim 1 , and wherein the plurality of distributed islands of the sintering aid film are substantially evenly distributed.3. The ceramic particle of claim 2 , wherein about 5 percent of the surface of the core substrate is covered by the plurality of distributed islands of the sintering aid film.4. The ceramic particle of claim 1 , wherein the ceramic particle is non-reactive with water.5. The ceramic particle of claim 1 , wherein the core substrate comprises barium titanate and the sintering aid film comprises at least one compound chosen from alumina claim 1 , an alkaline earth oxide claim 1 , zinc oxide claim 1 , titanium oxide claim 1 , boron nitride claim 1 , a silicon oxide ...

Insulating ceramic paste, ceramic electronic componet, and method for producing the same

Provided are an insulating ceramic paste, a ceramic electronic component, and a method for producing the ceramic electronic component that allow prevention of solder shorts between narrow-pitch terminal electrodes and suppression of generation of cracks in an insulator covering a portion of terminal electrodes during a firing step. The ceramic electronic component includes a ceramic multilayer substrate, terminal electrodes formed on a surface of the ceramic multilayer substrate, and an insulating ceramic film formed on the surface of the ceramic multilayer substrate so as to cover a portion of the terminal electrodes. An exposed surface portion (celsian-crystal-rich layer) of the insulating ceramic film has a thermal expansion coefficient that is lower than the thermal expansion coefficient of the ceramic multilayer substrate.

Thermal and environmental barrier coating for ceramic substrates

A thermal and environmental barrier coating composed of ceramic hollow microspheres sintered together. In one embodiment the microspheres are sintered together with a powder of another material that acts as a binder, or with a powder of a material that may be the same as the material of the hollow microspheres, forming a matrix in which the hollow microspheres are embedded. The hollow microspheres may be composed of a material with a high temperature capability, and with a low coefficient of thermal expansion.

ZIRCONIA SINTERED BODY, AND ZIRCONIA COMPOSITION AND CALCINED BODY

A zirconia sintered body, where when cross-sectional area of each zirconia crystal-grain is calculated in image of cross section of zirconia sintered body, converted crystal-grain size of each zirconia crystal-grain is calculated based on cross-sectional area where each zirconia crystal-grain has circular cross-sectional shape, zirconia crystal-grains are classified into class of <0.4 μm, class of ≧0.4 and <0.76 μm, and class of ≧0.76 μm based on converted crystal-grain size, total cross-sectional area of zirconia crystal-grains is calculated in each of classes, and rate of cross-sectional area to total cross-sectional area of all zirconia crystal-grains whose cross-sectional area has been calculated is calculated in each class, rate of cross-sectional area of zirconia crystal-grains in class of <0.4 μm is 4% to 35%, rate of cross-sectional area of zirconia crystal-grains in class of ≧0.4 and <0.76 μm is 24% to 57%, and rate of cross-sectional area of zirconia crystal-grains in class of ≧0.76 μm—is 16% to 62%.

POWDER FOR THERMAL SPRAYING, THERMAL SPRAYED COATING, AND METHOD FOR FORMING THERMAL SPRAYED COATING

A thermal spray powder of the present invention contains ceramic particles having an average particle size of 1 μm or more and 20 μm or less. The ceramic particles have a flowability index value FT of 3 or more measured by using a powder rheometer. The flowability index value FF is determined by measuring the maximum principal stress and the uniaxial collapse stress of the ceramic particles at normal temperature and normal humidity when 9 kPa of shear force is applied to the ceramic particles, and by dividing the measured maximum principal stress by the measured uniaxial collapse stress. 1. A thermal spray powder comprising ceramic particles having an average particle size of 1 μm or more and 20 μm or less ,wherein the ceramic particles have a flowability index value FF of 3 or more measured by using a powder rheometer, the flowability index value FF being determined by measuring a maximum principal stress and a uniaxial collapse stress of the ceramic particles at normal temperature and normal humidity when 9 kPa of shear force is applied to the ceramic particles, and by dividing the measured maximum principal stress by the measured uniaxial collapse stress.2. The thermal spray powder according to claim 1 , wherein the ceramic particles have a mean fractal dimension of 1.05 or more and 1.7 or less.3. The thermal spray powder according to claim 1 , wherein the ceramic particles are coated with a polymer.4. The thermal spray powder according to claim 1 , wherein the each of the ceramic particles has a surface claim 1 , and nanoparticles adhere to the ceramic particle surfaces.5. The thermal spray powder according to claim 1 , wherein the ceramic particles contain particles having particle sizes of 20 μm or more and 50 μm or less in a content of 40% by mass or less.6. A thermal spray coating obtained by thermally spraying the thermal spray powder according to .7. A method for forming a thermal spray coating claim 1 , comprising high velocity flame spraying or plasma ...

OXIDE SINTERED BODY, METHOD FOR PRODUCING SAME AND SPUTTERING TARGET

An oxide sintered body is provided which does not splash from the target surface even at the time of high power film formation, has a high film formation rate, and is used in a sputtering target capable of providing a high-refractive-index film. 2. The oxide sintered body according to claim 1 , wherein a relative density of the oxide sintered body is 98% or more.3. The oxide sintered body according to claim 1 , wherein a density of the oxide sintered body is 5.57 g/cmor more.4. The oxide sintered body according to claim 1 , wherein a crystal grain size of a ZnO phase in the oxide sintered body is 3 μm or less.5. The oxide sintered body according to claim 1 , wherein a bulk resistance value of the oxide sintered body is 100 Ω·cm or less.6. A sputtering target comprising the oxide sintered body according to as a target material. The present invention relates to an oxide sintered body containing zinc, niobium, aluminum, and oxygen as constituent elements and a sputtering target containing the sintered body.In recent years, high-refractive-index films have been adopted for adjusting the refractive index of portable displays and building material glasses. A general niobium oxide target as a high-refractive-index material cannot obtain the conductivity of a DC dischargeable target by an atmospheric sintering process, and thus the conductivity of the sintered body is enhanced by reducing the sintered body under high temperature and pressure conditions (see, for example, Patent Literature 1).It has also been reported that the resistivity decreases as zinc is added to niobium oxide (see, for example, Patent Literature 2).However, in any case of these methods, since any of these methods are required to employ a hot press method and a huge press mechanism is required for producing a large target, thus these methods are not a realistic process, and the target size is limited to small products. In addition, in the hot press method, sintering is conducted in a reducing atmosphere ...

Preceramic resin formulations, impregnated fibers comprising the preceramic resin formulations, composite materials, and related methods

A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 μm and second particles having an average mean diameter of from about 1.5 μm to about 5 μm. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.

Cellulose nanocrystal-modified ceramic blank and preparation method thereof

A cellulose nanocrystal-modified ceramic blank and a preparation method thereof are disclosed. Cellulose nanocrystals are added into a ceramic blank in gelcasting. The cellulose nanocrystal-modified ceramic blank comprises, by weight, 0.1 to 10 parts of cellulose nanocrystals, 0.1 to 30 parts of organic gel and 70 to 99 parts of ceramic powder. The cellulose nanocrystal has length of 100 to 300 nm, a diameter of 10 to 20 nm, a slenderness ratio of 10 to 15 , and an elastic modulus of 100 to 150 GPa. The drying strength of the ceramic blank with the cellulose nanocrystals is obviously improved.

Acoustically active articles

Articles and methods of making and using the articles are provided. The articles include inorganic agglomerates having an average dimension in a range from about 50 microns to about 2 mm. The porous agglomerates each include a network of carbon or silica, and metal oxide particles embedded in the network. Some agglomerates are capable of lowering a resonant frequency of an acoustic device when the resonant frequency is in a range from about 50 Hz to about 1500 Hz.

METHODS OF MAKING PROPPANT PARTICLES FROM SLURRY DROPLETS AND METHODS OF USE

A method for making proppant particles is provided. The method can include providing a slurry of ceramic raw material, the slurry containing a reactant including a polycarboxylic acid, and flowing the slurry through a nozzle in a gas while vibrating the slurry to form droplets. The method can also include receiving the droplets in a vessel containing a liquid having an upper surface in direct contact with the gas, the liquid containing a coagulation agent. The method can further include reacting the reactant with the coagulation agent to cause coagulation of the reactant in the droplets. The droplets can then be transferred from the liquid and dried to form green pellets. The method can include sintering the green pellets in a selected temperature range to form the proppant particles. In one or more exemplary embodiments, the reactant can be or include a PMA:PAA copolymer. 1. A method for making proppant particles , comprising:providing a slurry of ceramic raw material, the slurry containing a reactant comprising a polycarboxylic acid;flowing the slurry through a nozzle while vibrating the slurry to form droplets;receiving the droplets in a vessel containing a liquid comprising a coagulation agent to provide coagulation of the reactant in the droplets;transferring the droplets from the liquid;drying the droplets to form green pellets; andsintering the green pellets in a selected temperature range to form the proppant particles.2. The method of claim 1 , wherein the reactant comprises PMA claim 1 , PAA claim 1 , or a copolymer thereof.3. The method of claim 2 , wherein the reactant comprises a PMA:PAA copolymer.4. The method of claim 3 , wherein the reactant further comprises a polysaccharide.5. The method of claim 4 , wherein the polysaccharide is an alginate.6. The method of claim 1 , wherein the coagulation agent comprises one or more salts of calcium claim 1 , magnesium claim 1 , strontium claim 1 , aluminum claim 1 , or iron.7. The method of claim 6 , wherein ...

Water-based ceramic three-dimensional laminate material and method for using the same to manufacture ceramic objects

The invention relates to a water-based ceramic three-dimensional laminate material and a method for using the same material to manufacture the ceramic objects, comprising: a step Sa of preparing a plurality of projected slice graphics and a slurry, wherein the projected slice graphics are formed by slicing a three-dimensional image along a specific direction with a specific thickness, the slurry is prepared by mixing the material powder, the photo-curing resin, the solvent and the additive; a step Sb of uniformly laying the slurry on the substrate to form a sacrificial layer; and a step Sc of uniformly laying the slurry on the slurry to form a reaction layer on the sacrificial layer; a step Sd of irradiating the reaction layer with a light beam according to one of the plurality of projected slice graphics, and the slurry is cured after being irradiated; a step Se of repeating steps Sc and Sd until a ceramic body is formed; a step Sf of washing the ceramic body with water or an organic solvent; and a step Sg of sintering the ceramic body at a high temperature to form a ceramic object. 1. A method of manufacturing a ceramic object using a water-based ceramic three-dimensional laminate material , comprising:a step (Sa) of preparing a plurality of projected slice graphics and a slurry, wherein the projected slice graphics are generated by slicing a three-dimensional image along a specific direction with a specific thickness; the slurry is prepared by mixing material powder, photo-curable resin, solvent and additive; the material powder comprising at least one of aluminum oxide powder, zirconium oxide powder, and glass ceramic powder, the photo-curable resin comprising at least one of a water-soluble resin and a water-dispersible resin; the solvent is water or a mixed solvent comprising water and alcohols, and the additive includes at least one of a dispersing agent, a binder, and a plasticizer;a step (Sb) of uniformly laying the slurry on a substrate to form a ...

THERMALLY CONDUCTIVE COMPOSITE PARTICLES, METHOD FOR PRODUCING SAME, INSULATING RESIN COMPOSITION, INSULATING RESIN MOLDED BODY, LAMINATE FOR CIRCUIT BOARDS, METAL BASE CIRCUIT BOARD AND POWER MODULE

A thermally conductive composite particle, including: a core portion including an inorganic particle; and a shell portion including a nitride particle and covering the core portion, is provided. The thermally conductive composite particle is a sintered body. 1. A thermally conductive composite particle as a sintered body , comprising:a core portion including an inorganic particle; anda shell portion including a nitride particle and covering the core portion.2. The thermally conductive composite particle according to claim 1 , including at least boron nitride or silicon nitride as the nitride particle.3. The thermally conductive composite particle according to claim 1 , wherein at least part of the shell portion is layered claim 1 , and covers at least part of the core portion along a shape of the core portion.4. The thermally conductive composite particle according to claim 1 , wherein the shell portion is a sintered member of a mixture including the nitride particle and a sintering aid claim 1 , and the shell portion includes an atom derived from the sintering aid.5. The thermally conductive composite particle according to claim 4 , wherein the sintering aid is at least one selected from YO claim 4 , CeO claim 4 , LaO claim 4 , YbO claim 4 , TiO claim 4 , ZrO claim 4 , FeO claim 4 , MoO claim 4 , MgO claim 4 , AlO claim 4 , CaO claim 4 , BC claim 4 , or B.6. The thermally conductive composite particle according to claim 4 , wherein part of the atoms derived from the sintering aid is unevenly distributed on a surface of the core portion.7. The thermally conductive composite particle according to claim 4 , wherein the shell portion includes at least yttrium as the atom derived from the sintering aid.8. The thermally conductive composite particle according to claim 4 , wherein a total volume of the nitride particle and the sintering aid with respect to a total volume of the inorganic particle claim 4 , the nitride particle claim 4 , and the sintering aid is 30% by ...

USE OF SINTERED NANOGRAINED YTTRIUM-BASED CERAMICS AS ETCH CHAMBER COMPONENTS

In accordance with this disclosure, there are provided several inventions, including an apparatus and method for creating a plasma resistant part, which may be formed of a sintered nanocrystalline ceramic material comprising yttrium, oxide, and fluoride. Example parts thus made may include windows, edge rings, or injectors. In one configuration, the parts may be yttria co-sintered with alumina, which may be transparent. 1. A plasma resistant part adapted for use in a plasma processing chamber which is configured to produce a plasma while in an operating mode , wherein the part comprises a plasma-facing surface configured to face the plasma when the plasma chamber is in the operating mode , wherein the surface is formed of a sintered nanocrystalline ceramic material comprising yttrium in addition to oxide and/or fluoride.2. The plasma resistant part of claim 1 , wherein the ceramic material comprises YO.3. The plasma resistant part of claim 1 , wherein the ceramic material comprises YFor YOF.4. The plasma resistant part of claim 1 , wherein the part is an edge ring.5. The plasma resistant part of claim 1 , wherein the part is a gas injector.6. The plasma resistant part of claim 1 , further comprising a first layer and a second layer that are co-sintered together claim 1 , and wherein the plasma-facing surface is part of the second layer claim 1 , and the second layer is a nanocrystalline ceramic material.7. The plasma resistant part of claim 6 , wherein the first layer is a microcrystalline ceramic material.8. The plasma resistant part of claim 7 , wherein the first layer comprises alumina.9. The plasma resistant part of claim 7 , wherein the plasma resistant part is a window.10. A plasma processing apparatus comprising the plasma resistant part of claim 1 , further comprising:the plasma processing chamber; anda substrate support,wherein the plasma resistant part is situated in the plasma processing chamber, such that its plasma-facing surface faces the plasma when ...

MAGNETODIELECTRIC Y-PHASE STRONTIUM HEXAGONAL FERRITE MATERIALS FORMED BY SODIUM SUBSTITUTION

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase strontium hexagonal ferrite material. In some embodiments, sodium can be added into the crystal structure of the hexagonal ferrite material in order to achieve high resonance frequencies while maintaining high permeability. 1. (canceled)2. A modified sodium substituted strontium hexagonal ferrite comprising:a Y-phase strontium hexagonal ferrite crystal structure including elements strontium, sodium, cobalt, iron, oxygen and one of a tetravalent ion and a trivalent ion, the at least one of the tetravalent ion and the trivalent ion configured to charge balance for the sodium substituting at least partially for the strontium in the crystal structure; anda permeability of between 5 and 6.3. The modified sodium substituted strontium hexagonal ferrite of wherein the crystal structure contains the trivalent ion.4. The modified sodium substituted strontium hexagonal ferrite of wherein greater than zero and less than or equal to 1.5 of the trivalent ion is included in the crystal structure.5. The modified sodium substituted strontium hexagonal ferrite of wherein the trivalent ion is selected from the group consisting of Al claim 3 , Ga claim 3 , Sc claim 3 , Cr claim 3 , Mn claim 3 , In claim 3 , Yb claim 3 , Er claim 3 , Y and lanthanide elements.6. The modified sodium substituted strontium hexagonal ferrite of wherein the trivalent ion is scandium.7. The modified sodium substituted strontium hexagonal ferrite of wherein the crystal structure contains the tetravalent ion.8. The modified sodium substituted strontium hexagonal ferrite of wherein greater than zero and less than or equal to 0.75 of the tetravalent ion is included in the crystal structure.9. The modified sodium substituted strontium hexagonal ferrite of wherein the tetravalent ion is selected from the group consisting of Si claim 7 , Ge claim 7 ...

PLASMA RESISTANT SEMICONDUCTOR PROCESSING CHAMBER COMPONENTS

Described herein are components of a semiconductor processing apparatus, where at least one surface of the component is resistant to a halogen-containing reactive plasma. The component includes a solid structure having a composition containing crystal grains of yttrium oxide, yttrium fluoride or yttrium oxyfluoride and at least one additional compound selected from an oxide, fluoride, or oxyfluoride of neodymium, cerium, samarium, erbium, aluminum, scandium, lanthanum, hafnium, niobium, zirconium, ytterbium, hafnium, and combinations thereof. 1. A component of a semiconductor processing apparatus , wherein a surface of the component is resistant to a halogen-comprising reactive plasma , the component comprising: crystal grains selected from a group consisting of yttrium oxide, yttrium fluoride and yttrium oxyfluoride, and', 'at least one additional compound selected from a group consisting of an oxide, fluoride, or oxyfluoride of neodymium, cerium, samarium, erbium, aluminum, scandium, lanthanum, hafnium, niobium, zirconium, ytterbium and combinations of an oxide, fluoride or oxyfluoride of at least one of these elements., 'a solid structure having an overall uniform composition, wherein the composition comprises2. The component of claim 1 , wherein the composition further comprises an amorphous phase comprising yttrium and fluorine.3. The component of claim 1 , wherein the composition comprises a yttrium aluminum oxyfluoride (Y—Al—O—F) amorphous phase.4. The component of claim 1 , wherein the composition comprises a yttrium oxide.5. The component of claim 1 , wherein in the composition comprises a yttrium fluoride.6. The component of claim 1 , wherein the composition comprises a yttrium oxyfluoride.7. The component of claim 1 , wherein the at least one additional compound comprises aluminum oxide claim 1 , aluminum fluoride or aluminum oxyfluoride.8. The component of claim 1 , wherein the at least one additional compound comprises zirconium oxide claim 1 , ...

ELECTROSTATIC CHUCK DEVICE AND METHOD FOR MANUFACTURING ELECTROSTATIC CHUCK DEVICE

An electrostatic chuck device includes: a base having one principal surface which is a placing surface on which a plate-shaped sample is placed, wherein the base is made from a sintered compact of ceramic particles, which include silicon carbide particles and aluminum oxide particles, as a forming material; and an electrostatic attraction electrode which is provided on a surface of the base on the side opposite to the placing surface of the base, or in the interior of the base, in which the volume resistivity value of the sintered compact is 0.5×10Ωcm or more in the entire range from 24° C. to 300° C., a graph which shows the relationship of the volume resistivity value of the sintered compact to a temperature at which the volume resistivity value of the sintered compact is measured has a maximum value in the range from 24° C. to 300° C., and the amount of metal impurities in the sintered compact other than aluminum and silicon in the sintered compact is 100 ppm or less. 1. An electrostatic chuck device comprising:a base having one principal surface which is a placing surface on which a plate-shaped sample is placed, wherein the base is made from a sintered compact of ceramic particles, which include silicon carbide particles and aluminum oxide particles, as a forming material; andan electrostatic attraction electrode which is provided on a surface of the base on the side opposite to the placing surface of the base, or in an interior of the base,{'sup': '15', 'wherein a volume resistivity value of the sintered compact is 0.5×10Ωcm or more in an entire range from 24° C. to 300° C.,'}a graph which shows a relationship of the volume resistivity value of the sintered compact to a temperature at which the volume resistivity value of the sintered compact is measured has a maximum value in the range from 24° C. to 300° C., andthe amount of metal impurities in the sintered compact other than aluminum and silicon is 100 ppm or less.2. The electrostatic chuck device according ...

GARNET MATERIALS FOR LI SECONDARY BATTERIES AND METHODS OF MAKING AND USING GARNET MATERIALS

Set forth herein are garnet material compositions, e.g., lithium-stuffed garnets and lithium-stuffed garnets doped with alumina, which are suitable for use as electrolytes and catholytes in solid state battery applications. Also set forth herein are lithium-stuffed garnet thin films having fine grains therein. Disclosed herein are novel and inventive methods of making and using lithium-stuffed garnets as catholytes, electrolytes and/or anolytes for all solid state lithium rechargeable batteries. Also disclosed herein are novel electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Also set forth herein are methods for preparing novel structures, including dense thin (<50 um) free standing membranes of an ionically conducting material for use as a catholyte, electrolyte, and, or, anolyte, in an electrochemical device, a battery component (positive or negative electrode materials), or a complete solid state electrochemical energy storage device. Also, the methods set forth herein disclose novel sintering techniques, e.g., for heating and/or field assisted (FAST) sintering, for solid state energy storage devices and the components thereof. 1. A composition comprising a lithium stuffed garnet and AlO , wherein the lithium-stuffed garnet is characterized by the empirical formula{'sub': A', 'B', 'C', 'D', 'E', 'F, 'LiLaM′M″ZrO, wherein 4 Подробнее

DENTAL MILL BLANK, PROCESS FOR PRODUCTION AND USE THEREOF

The invention relates to a coloured zirconia ceramic dental mill blank having fluorescing properties, processes of production such a mill blank and uses thereof, in particular for producing zirconia ceramic dental restorations. The dental mill blank having a shape allowing the dental mill blank to be attached or fixed to a machining device, the dental mill blank comprising a porous zirconia material, the porous zirconia material comprising the oxides Zr oxide calculated as Zr02: from about 80 to about 97 wt.-%, Al oxide calculated as Al203: from about 0 to about 0.15 wt.-%, Y oxide calculated as Y203: from about 1 to about 10 wt-%, Bi oxide calculated as Bi203: from about 0.01 to about 0.20 wt-%, Tb oxide calculated as Tb203: from about 0.01 to about 0.8 wt.-%, and optionally one or two of the following oxides: Er oxide calculated as Er203: from about 0.01 to about 3.0 wt.-%, Mn oxide calculated as Mn02: from about 0.0001 to about 0.08 wt.-%, the porous zirconia material not comprising Fe oxide calculated as Fe203 in an amount of more than about 0.01 wt.-%, wt.-% with respect to the weight of the porous zirconia material. 1. A dental mill blank having a shape allowing the dental mill blank to be attached or fixed to a machining device , the dental mill blank comprising a porous zirconia material , the porous zirconia material comprising the oxides:Zr oxide calculated as ZrO2: from about 80 to about 97 wt.-%,Al oxide calculated as Al2O3: from about 0 to about 0.15 wt.-%,Y oxide calculated as Y2O3: from about 1 to about 10 wt.-%,Bi oxide calculated as Bi2O3: from about 0.01 to about 0.20 wt.-%,Tb oxide calculated as Tb2O3: from about 0.01 to about 0.8 wt.-%,and optionally one or two of the following oxides:Er oxide calculated as Er2O3: from about 0.01 to about 3.0 wt.-%,Mn oxide calculated as MnO2: from about 0.0001 to about 0.08 wt.-%,the porous zirconia material not comprising Fe oxide calculated as Fe2O3 in an amount of more than about 0.01 wt.-%, wt.-% with ...

EXOTHERMIC POWDERS FOR ADDITIVE MANUFACTURING

A method of additive manufacturing to form a component comprises successively depositing a plurality of layers to form the component. Depositing at least one of the plurality of layers includes depositing a layer of a first particulate precursor over a platen, depositing a second particulate precursor on portions of the platen over the layer of the first particulate precursor specified by a controller, and directing energy to the second particulate precursor deposited on the portion of the platen to cause an exothermic chemical reaction between the first particulate precursor and the second particulate precursor. The exothermic chemical reaction produces heat that sinters products of the chemical reaction to fabricate the layer of the component. 1. A method of additive manufacturing to form a component , the method comprising: depositing a layer of a first particulate precursor on a platen;', 'depositing a second particulate precursor on portions of the platen over the layer of the first particulate precursor specified by a controller; and', 'directing energy to the second particulate precursor deposited on the portion of the platen to cause an exothermic chemical reaction between the first particulate precursor and the second particulate precursor, wherein the exothermic chemical reaction produces heat that sinters products of the chemical reaction to fabricate the layer of the component., 'successively depositing a plurality of layers to form the component, wherein depositing at least one of the plurality of layers includes'}2. The method of claim 1 , wherein the first particulate precursor is a metal oxide claim 1 , the metal oxide being MoO claim 1 , FeO claim 1 , NiO claim 1 , or CuO claim 1 , or a combination thereof.3. The method of claim 1 , wherein the second particulate precursor is aluminum claim 1 , silicon or carbon claim 1 , or a combination thereof.4. A method of additive manufacturing to form a component claim 1 , the method comprising: depositing a ...

Ceramic composition and cutting tool

In a ceramic composition mainly composed of alumina (Al 2 O 3 ), tungsten carbide (WC) and zirconia (ZrO 2 ), zirconium (Zr) is distributed in a first grain boundary as an interface where an alumina (Al 2 O 3 ) crystal grain is adjacent to a tungsten carbide (WC) crystal grain and in a second grain boundary as an interface where two alumina (Al 2 O 3 ) crystal grains are adjacent to each other.

High zirconia fused cast refractory

[Problems] To provide a high zirconia fused cast refractory that suffers less cracks in production and on heating, has excellent productivity, is hard to form zircon crystals with the refractory solely and under conditions where the refractory is in contact with molten glass, is hard to suffer cracks on receiving heat cycles in operation of a glass melting furnace, and has durability for a prolonged period of time. [Solution to Problems] A high zirconia fused cast refractory containing, as chemical components, from 85 to 95% by weight of ZrO 2 , from 0.4 to 2.5% by weight of Al 2 O 3 , from 3.5 to 10% by weight of SiO 2 , from 0.05 to 1% by weight in total of Na 2 O and K 2 O, more than 0.04% by weight and 1% by weight or less of B 2 O 3 , 0.02% by weight or less of P 2 O 5 , 0.05% by weight or less of MgO, from 0.01 to 0.2% by weight of CaO, in the case where any one of SrO and BaO is contained, from 0.3 to 3% by weight of SrO or more than 0.5% by weight and 3% by weight or less of BaO, and in the case where both of them are contained, 0.3% by weight or more of SrO and from 0.3 to 3% by weight in total of SrO and BaO, from 0.01 to 0.7% by weight of SnO 2 , and 0.3% by weight or less in total of Fe 2 O 3 and TiO 2 .