ОГНЕУПОРНОЕ ИЗДЕЛИЕ И СПОСОБ ЕГО ФОРМОВАНИЯ И ИСПОЛЬЗОВАНИЯ

Изобретение относится к огнеупорному изделию. Технический результат изобретения заключается в повышении стойкости огнеупора к коррозии. Огнеупорное изделие содержит по меньшей мере 90 масс. % AlO; менее 3 масс. % SiOи первую легирующую добавку, содержащую оксид Та, Nb или их любое сочетание. 2 н. и 12 з.п. ф-лы, 10 ил.

СИНТЕТИЧЕСКИЕ РАСКЛИНИВАЮЩИЕ НАПОЛНИТЕЛИ И МОНОДИСПЕРСНЫЕ РАСКЛИНИВАЮЩИЕ НАПОЛНИТЕЛИ И СПОСОБЫ ИХ ИЗГОТОВЛЕНИЯ

Изобретение относится к расклинивающим наполнителям и способам их создания. Описывается множество керамических расклинивающих наполнителей, где наполнители являются монодисперсными с распределением, являющимся распределением 3-сигма или ниже с шириной общего распределения 5% или менее от среднего размера частиц, а также другие варианты указанных наполнителей, способы изготовления этих расклинивающих наполнителей и способы использования этих расклинивающих наполнителей в извлечении углеводородов. Изобретение развито в зависимых пунктах формулы. Технический результат - повышение степени монодисперсности расклинивающего наполнителя, производительности при его получении, повышение эффективности гидроразрыва с использованием указанных наполнителей. 18 н. и 147 з.п. ф-лы, 38 ил., 15 табл., 7 пр.

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.

ЕМКОСТЬ ДЛЯ РАСПЛАВЛЕННОГО МЕТАЛЛА И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ

Сосуд содержит тело из огнеупорного материала. Тело имеет полость для содержания или передачи расплавленного металла и наружную поверхность, содержащую внедренную в нее или непосредственно под ней армирующую сетку из металлической проволоки. Участки сетки при наложении образуют между собой просветы, в которые проникает огнеупорный материал. Сетка содержит по меньшей мере две наложенные друг на друга сеточные части. Одна часть представляет собой плетеный проволочный каркас. Другая часть представляет собой неплетеный проволочный каркас. Обеспечивается создание сопротивления образованию трещин или сдерживание их и сопротивление утечкам расплавленного металла при образовании трещин. 5 н. и 27 з.п. ф-лы, 9 ил., 1 пр.

АБРАЗИВ ВЫСОКОТЕМПЕРАТУРНОГО СВЯЗЫВАНИЯ (ВАРИАНТЫ) И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Абразив высокотемпературного связывания содержит стекловидную связующую основу, в которой распределены абразивные частицы оксида алюминия. Стекловидная связующая основа имеет температуру отверждения не менее 1000°С. Абразивные частицы оксида алюминия содержат поликристаллический альфа-оксид алюминия, имеющий тонкую микрокристаллическую структуру со средним размером доменов не более 500 нм. Абразивные частицы оксида алюминия содержат также пиннинг-агент в виде фазы, диспергированной в поликристаллическом альфа-оксиде алюминия. Абразивные частицы альфа-оксида алюминия получают путем термообработки предшественника альфа-оксида алюминия, содержащего пиннинг-агент, при температуре не менее 1350°С. Смешивают абразивные частицы со стекловидной связующей основой и формуют заготовку. Заготовку подвергают термообработке при температуре отверждения не менее 1000°С. Повышается твердость абразива и стойкость к коррозии. 3 н. и 12 з.п. ф-лы, 2 табл.

Способ получения термостойкого радиотехнического материала

Изобретение относится к конструкционным, электротехническим и теплозащитным материалам и предназначено для использования в теплонагруженных изделиях и конструкциях радиотехнического назначения. Технический результат заключается в получении термостойкого радиотехнического материала со стабильными геометрическими размерами при нагреве выше 300°С с сохранением стабильных прочностных характеристик, а также низкими значениями пористости и водопоглощения материала. Получают композицию путем смешения алюмохромфосфатного связующего марки Фоскон-351 с порошком белого электрокорунда, наносят ее на кварцевую и многослойную кремнеземную стеклоткань, аппретированные спиртоацетоновым раствором кремнийорганической смолы КМ-9К. Слои ткани укладывают друг на друга в заданном порядке, отверждают под вакуумом, термообрабатывают при температуре 300°С в течение 3-4 ч и охлаждают до комнатной температуры. Полученную заготовку пропитывают кремнийорганической смолой марки МФСС-8 в течение 1-2 ч, сушат на воздухе ...

Композиционный керамический материал для режущих инструментов

Изобретение относится к композиционным керамическим материалам, которые могут быть использованы для изготовления режущего инструмента и машиностроительных изделий. Керамический композиционный материал для режущих инструментов, включающий в себя глинозем (α-Al2O3) и карбид титана (TiC), дополнительно содержит диборид титана (TiB2) при следующем соотношении компонентов, мас.%: глинозем (α-Al2O3) 30-33; карбид титана (TiC) 27-30; диборид титана (TiB2) 40-41. Технический результат - улучшение физико-механических характеристик композиционного керамического материала, а именно увеличение прочности при изгибе, трещиностойкости и твердости. 1 табл., 3 пр.

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 ...

АЛЮМОИТТРИЕВЫЕ ЧАСТИЦЫ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

... 1. Сплавной поликристаллический материал, содержащий Al2О3 и Y2О3, в котором, по меньшей мере, часть Al2О3 является переходным Al2О3, и в котором, по меньшей мере, часть Al2О3 и Y2О3 присутствует в виде комплекса Al2О3 и Y2О3. 2. Сплавной поликристаллический материал по п.1, отличающийся тем, что комплекс Al2О3 и Y2О3 представлен, по меньшей мере, одной из следующих кристаллических структур: гаметическая структура кристалла, кристаллическая структура перовскита или микроструктура, содержащая дендритные кристаллы. 3. Сплавной поликристаллический материал по п.1 или 2, отличающийся тем, что дендритные кристаллы имеют средний размер менее чем 2 микрометра. 4. Сплавной поликристаллический материал по п.1 или 2, отличающийся тем, что содержит, по меньшей мере, 50 массовых процентов Al2О3. 5. Сплавной поликристаллический материал по п.1, отличающийся тем, что материал находится в форме частиц, содержащих Al2О3 и Y2О3, в котором, по меньшей мере, часть Al2О3 является переходным Al2О3, и в котором ...

Низкотемпературный стеклокерамический материал и способ его изготовления

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

СПОСОБ ПОЛУЧЕНИЯ 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 ИЗГОТОВЛЕНИЯ ДЕТАЛИ ИЗ КОМПОЗИТНОГО МАТЕРИАЛА ПОСРЕДСТВОМ САМОРАСПРОСТРАНЯЮЩЕГОСЯ ВЫСОКОТЕМПЕРАТУРНОГО СИНТЕЗА

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

ЕМКОСТЬ ДЛЯ РАСПЛАВЛЕННОГО МЕТАЛЛА И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ

... 1. Сосуд для расплавленного металла, содержащий тело из огнеупорного материала, имеющее полость для содержания или передачи расплавленного металла и наружную поверхность, содержащую внедренную в нее армирующую сетку из металлической проволоки, причем участки указанной проволоки, при наложении друг на друга, образуют между собой просветы, в которые проникает огнеупорный материал.2. Сосуд по п.1, отличающийся тем, что тело имеет горизонтальный уровень, выше которого верхняя поверхность расплавленного металла, содержащегося в указанной полости или передаваемого через нее, не поднимается при нормальном использовании сосуда, при этом указанная армирующая сетка внедрена по меньшей мере на всех участках наружной поверхности, расположенных на указанном горизонтальном уровне или ниже указанного горизонтального уровня.3. Сосуд по п.1 или 2, отличающийся тем, что указанная сетка из металлической проволоки представляет собой плетеный каркас из металлической проволоки.4. Сосуд по п.1 или 2, отличающийся ...

OLIGOSILOXANE SOWIE UNTER DEREN VERWENDUNG ERHAELTLICHE VERSTAERKTE THERMOPLASTISCHE UND KERAMISCHE MASSEN

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 ZUM ENTFERNEN VON METALL AUS VERBUNDKÖRPERN UND SO ERHALTENE PRODUKTE

FEUERFESTE ISOLIERUNGSZUSAMMENSETZUNG UND VERFAHREN ZU IHRER HERSTELLUNG

Keramischer Verbundwerkstoff.

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.

Werkzeug in Form eines heizbaren Stiftes

Bewehrte, Natriumionen leitende Festelektrolytmembranen und Verfahren zu ihrer Herstellung

Natriumionen leitende Festelektrolytmembran von 0,5 bis 6 mm Stärke, dadurch gekennzeichnet, dass Natriumionen leitende Kristallstrukturen, die sich von der einen bis zur anderen Oberfläche der Festelektrolytmembran erstrecken, mit einer Bewehrung (2) verstärkt sind, welche aus einer oder mehreren Lagen von Gelege, Gewebe, Gewirke oder Geflecht aus Monofilen, Garnen, Zwirnen oder Drähten eines bis 430°C beständigen Materials mit einer 0,2-%-Dehngrenze Rp = 0,2 von wenigstens 200 N/mm2 besteht.

Verfahren zum Herstellen eines Verbundwerkstoff-Bauteils

Die Erfindung betrifft ein Verfahren zum Herstellen eines Verbundwerkstoff-Bauteils mit den Schritten: Pressen eines Pulvers, welches zumindest ein erstes Metall (12) und ein zweites Metall (14), welches oxophiler als das erste Metall (12) ist, umfasst, in eine Vorform des späteren Verbundwerkstoff-Bauteils (S1), und Härten des späteren Verbundwerkstoff-Bauteils durch Wärmebehandlung der Vorform des späteren Verbundwerkstoff-Bauteils (S4), wodurch das erste Metall (12) in eine Matrix aus zumindest dem zweiten Metall (14) oder das zweite Metall (14) in eine Matrix aus zumindest dem ersten Metall (12) eingebettet wird, wobei vor, während oder nach dem Pressen der Vorform des späteren Verbundwerkstoff-Bauteils zumindest das zweite Metall (14) mittels einer inneren Oxidation als Keramik in seine oxidierte Form überführt wird (S2). Ebenso betrifft die Erfindung ein Verbundwerkstoff-Bauteil.

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

Keramisches Rußbläserelement

METHOD OF MAKING COMPOSITE SINTERED ARTIFACT

CERAMIC COMPOSITE

"Plasma sprayed coatings"

Disclosed is a coating for bearing faces of piston rings and a powder composition for plasma spray application of such coating. The plasma spray powder comprises 94%-98% by weight of aluminum oxide and titanium oxide and 2%-6% by weight of yttrium oxide. The inclusion of yttrium oxide in the aluminum oxide-titanium oxide coating composition reduces the tendency of the coating to blistering and spalling which resulting in coating loss during use of the ring. Intra-coating delamination is substantially reduced or eliminated.

PROCEDURE FOR THE PRODUCTION OF A WEARING PART AND WEARING PART

GESINTERTES ALUMINIUMOXID-SCHLEIFKORN UND GESINTERTES ALUMINIUMOXID-SCHLEIFKORN UND SCHLEIFENDE ERZEUGNISSE SCHLEIFENDE ERZEUGNISSE

PROCEDURE AND SCHLICKER FOR THE PRODUCTION OF A MOLDED ARTICLE FROM CERAMIC MATERIAL, CERAMIC MOLDED ARTICLE AND USE OF SUCH A MOLDED ARTICLE

SINTERED CERAMIC PRODUCT WITH NITROGENOUS FORM WITH IMPROVED SURFACE PROPERTIES

HONEYCOMB STRUCTURAL BODY

PROCEDURE FOR THE PRODUCTION OF AN FERROUSELECTRICAL COMPOSITE MATERIAL

HIGH PRESSURE TLA DUNG LAMP

GESINTERTES ALUMINIUMOXID-SCHLEIFKORN UND SCHLEIFENDE ERZEUGNISSE

MELTED SHARPENING PARTICLES, AND PROCEDURES FOR THE PRODUCTION AND USE THE SAME.

PROCEDURE FOR THE PRODUCTION OF EUTECTIC CERAMIC(S)

CERAMIC FIBERS ABSTENTIONS, DUCTILE ONE FIREPROOF COMPOSITIONS

WHISKER OF STRENGTHENING COMPOUND MATERIALS FOR CUT TOOLS WITH IMPROVED ACHIEVEMENT

SINTERED COMPOUND SHARPENING GRAIN, PROCEDURE FOR ITS PRODUCTION AS WELL AS ITS USE

SINTERED COMPOUND GRINDING WHEEL, PROCEDURE FOR ITS PRODUCTION AS WELL AS ITS USE.

PROCEDURE FOR THE PRODUCTION OF AN ABSTENTION OF CERAMIC(S) MATERIAL A CONCAVITY.

PRODUCTION OF CERAMIC AND METAL-CERAMIC FUELLSTOFF CONTAINING COMPOUND BODIES.

FIREPROOF KOMPOSITMATERIAL.

MICROWAVE SINTER PROCEDURE

SPHERICAL CERAMIC(S) MOLDED ARTICLES, PROCEDURES FOR YOUR PRODUCTION AS WELL AS THEIR USE

warm pressing for compacting refractory materials

MELTED EUTECTIC MATERIALS OUT ALUMINIUMOXICARBID/NITRIDE ALUMINIUMSELTENERDOX D, SHARPENING PARTICLE, SHARPENING ARTICLES AND PROCEDURES FOR THE PRODUCTION AND USE THE SAME

PROCEDURE FOR THE PRODUCTION ELECTRICALLY OF AN ISOLATION AND MECHANICAL STRUCTURING COVERING ON AN ELECTRICAL CONDUCTOR

TOOL EMPLOYMENT AND ASSOCIATED MANUFACTURING PROCESS

TOOL FROM WHISKER-STRENGTHENED CERAMIC MATERIAL.

MIXTURE CERAMIC(S) ON ALUMINA BASIS

WITH KAUTSCHUKKRÜMELN STRENGTHENED CEMENT CONCRETE

BIOACTIVE BONDING MATERIALS AND METHODS TO YOUR PRODUCTION

WHISKER REINFORCED CERAMIC MATERIAL WORKING TOOLS

PRODUCTION OF CERAMIC AND CERAMIC-METAL COMPOSITE ARTICLES INCORPORATING FILLER MATERIALS

PROCESS FOR PREPARING A COMPOSITE MATERIAL

Al2o3-la2o3-y2o3-mgo ceramics, and methods of making the same

IN SITU PRODUCTION OF SILICON CARBIDE REINFORCED CERAMIC COMPOSITES

REFRACTORY AND THERMALLY INSULATING MODULE

Ceramic compositions

Physical vapor deposition of titanium nitride on a nonconductive substrate

CUTTING TOOL FORMED FROM CERAMIC MATRIX REINFORCED BY CERAMIC WHISKERS

REFRACTORY MATERIAL FOR CASTING A RARE-EARTH ALLOY AND ITS PRODUCTION METHOD AS WELL AS METHOD FOR CASTING THE RARE-EARTH ALLOYS

In casting a rare earth alloy into a sheet (6) using a tundish (3, 13), as a refractory for a tundish which can be used for dispensing with a preheating step for the purpose of improving the flow of a melt (2), use is made of a refractory which consists substantially of 70 wt.% or more of Al2O3 and 30 % or less of SiO2 or consists substantially of 70 wt.% or more of ZrO2 and 30 % or less of one or more of Y2O3, Ce2O3, CaO, MgO, Al2O3, TiO2 and SiO2, and has a bulk density of 1 g/cm3, a thermal conductivity in a temperature range of 1200 to 1400 ~C of 0.5 kcal/(mh ~C) or less, and a heat loss under a heating condition of one hour at 1400 ~C of 0.5 wt.% or less.

WHISKER-REINFORCED CERAMIC CONTAINING ALUMINUM OXYNITRIDE AND METHOD OF MAKING THE SAME

A ceramic body (20), as well as a method for making the same, wherein the ceramic body contains aluminum oxynitride and whiskers, (and optionally) one or more of titanium carbonitride, and/or alumina, and/or zirconia, and/or other component(s).

METHOD FOR THE PRODUCTION OF HYBRID SPHERICAL MOLDED BODIES FROM SOLUBLE POLYMERS

The invention relates to a method for producing hybrid spherical molded bodies from soluble polymers and at least one embedded additive. According to the inventive method, an additive-loaded polymer solution is dispersed in an inert solvent, said dispersion process being carried out at a reduced pressure. The resulting particle dispersion is cooled to a temperature lying below the solidification point of the polymer solution. The stabilized particles of the polymer solution are separated from the inert solvent. The separated particles of the polymer solution are precipitated in a solvent coagulating the polymer. The solvent-moistened polymer particles are dried until said particles are maximally condensed, and the resulting particles that are made of polymer and the additive are sintered by means of a thermal treatment so as to be turned into porous and/or highly condensed molded bodies. The inventive method makes it possible to obtain highly stable molded bodies which do not sinter together ...

3-D PRINTING OF NEAR NET SHAPE PRODUCTS

The disclosed method relates to manufacture of a near net-shaped products such as ceramic containing products such as ceramic-metal composites. The method entails forming a mixture of a build material and a binder and depositing that mixture onto a surface to produce a layer of the mixture. An activator fluid then is applied to at least one selected region of the layer to bond the binder to the build material to yield a shaped pattern. These steps may be repeated to produce a porous whitebody that is heat treated to yield a porous greenbody preform having a porosity of about 30% to about 70 %. The greenbody then is impregnated with a molten material such as molten metal. Where the build material is SiC, the molten metal employed is Si to generate a SiC-Si composite.

SINTERED CERMETS FOR TOOL AND WEAR APPLICATIONS

A composition of material comprising aluminum oxide and refractory transition metal diborides, with additions of magnesium oxide and, optionally, transition metal carbides, nitrides, carbonitrides and iron group metals for sintering and grain morphology control, is disclosed, which is particularly useful as a cutting tool for steels, cast iron, and hard to machine materials, such as superalloys. In contrast to the TiC-Al2O3 cermets of the prior art which have to be hot pressed for optimum properties, a large portion of the cermets of the invention can also be fabricated, without detriment to performance, by sintering the cold pressed powder compacts in an inert furnace atmosphere at temperatures between 1650.degree.C and l820.degree.C.

METHOD FOR PREPARING CONFIGURED SILICON CARBIDE WHISKER-REINFORCED ALUMINA CERAMIC ARTICLES

METHOD FOR PREPARING CONFIGURED SILICON CARBIDE WHISKER-REINFORCED ALUMINA CERAMIC ARTICLES A ceramic article of alumina reinforced with silicon carbide whiskers suitable for the fabrication into articles of complex geometry are provided by pressureless sintering and hot isostatic pressing steps. In accordance with the method of the invention a mixture of 5 to 10 vol.% silicon carbide whiskers 0.5 to 5 wt.% of a sintering aid such as yttria and the balance alumina powders is ballmilled and pressureless sintered in the desired configuration an inert atmosphere at a temperature of about 1800.degree.C to provide a self-supporting configured composite of a density of at least about 94% theoretical density. The composite is then hot isostatically pressed at a temperature and pressure adequate to provide configured articles of at least about 98% of theoretical density which is sufficient to provide the article with sufficient strength and fracture toughness for use in most structural applications ...

COATED CERAMIC FILLER MATERIALS

Coated ceramic filler materials comprised of ceramic particles, fibers, whiskers, etc. having at least two substantially continuous coatings thereon are provided. The coatings are selected so that the interfacial shear strength between the ceramic filler material and the first coating, between coatings, or between the outer coating and the surrounding matrix material, are not equal so as to permit debonding and pull-out when fracture occurs. The resultant, multi-coated ceramic filler materials may be employed to provide ceramic matrix composites with increased fracture toughness. The ceramic filler materials are designed to be particularly compatible with ceramic matrices formed by directed oxidation of precursor metals.

HIGH FRACTURE TOUGHNESS CERAMIC SUPPORT NUT PLATE AND GANG CHANNEL

COMPOSITE MATERIALS AND METHOD OF ITS MANUFACTURE

A novel solution route has been developed that after heat-treatment to 500- 600~C under inert atmosphere, yields highly porous composites of nano-sized metal (Ni) particle inclusions in ceramics (Al2O3). Metal loadings could be made from < 1% to >95% Ni. The metal inclusion sizes in the Ni-Al2O3 system with the 10 atom% Ni sample were 4-7 nm, while for the 75 atom% Ni sample they were 5-8 nm. It was shown that the 10 atom% Ni sample could be used as a catalyst for the conversion of CO2 and CH4 in the temperature range 550-700~C, while higher temperatures led to growth of the Ni particles and carbon poisoning over time. The solution routes could also be deposited as thin dense films containing <10 nm Ni particles. Such films with high Ni-particle loadings deposited on aluminium substrates have shown very good solar heat absorber proficiency and provide good substrates for carbon tube growth.

HIGH RELIABILITY CERAMIC MULTILAYER LAMINATES, MANUFACTURING PROCESS AND DESIGN THEREOF

The present invention concerns ceramic multilayered laminates, the relative design and manufacturing process, wherein the ceramic multilayered laminates according to the present invention presents a pre-determined mechanical strength characterised by a limited coefficient of variability. By a proper choice of the single layer material and of the stacking order, it is possible to tailor the residual stress profile within the laminate and to obtain "T-curve" fracture behaviour of the laminate.

METHOD FOR THE PRODUCTION OF A PART MADE FROM A COMPOSITE MATERIAL

L'invention concerne un procédé de fabrication d'une pièce en matériau composite comprenant les étapes suivantes: formation d'une préforme fibreuse de la pièce à obtenir par dépôt sur une surface d'une pluralité de structures fibreuses imprégnées (3) par un polymère thermoplastique, le dépôt étant effectué par placement automatique de fibres, élimination du polymère thermoplastique présent dans la préforme par dissolution par un solvant, et injection d'une composition d'imprégnation liquide dans la porosité de la préforme fibreuse après élimination du polymère thermoplastique afin de former une matrice dans la porosité de la préforme fibreuse.

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.

PROCESS FOR PRODUCING A CERAMIC MATRIX COMPOSITE PART

L'invention concerne un procédé d'élaboration d'une pièce composite à matrice céramique (CMC) par infiltration d'une suspension (S) d'une poudre céramique dans un renfort fibreux (14). On prépare une suspension (S) de poudre céramique contenant des particules de granulométries choisies, dispersées dans au moins un solvant. L'infiltration de la suspension est réalisée en une seule étape dans le renfort fibreux (14), disposé entre un moule (12) et une membrane perméable (16), ce qui permet d'appliquer un vide (V) et d'éliminer ensuite le solvant de la suspension au travers de la membrane perméable (16). L'invention s'applique à l'élaboration de pièces de grandes dimensions et de forme complexe, en particulier dans le domaine de l'aéronautique et de l'aérospatiale.

CERAMIC COMPOSITION FOR WEAR RESISTANT APPLICATIONS

A composition for hard, sintered, tough and wear resistant ceramic articles is described. The composition is comprised of alumina, titanium carbonitride and filaments of titanium diboride or titanium nitride. The ceramic articles made of this composition are isostatically hot pressed or sintered at high temperature in inert gas. The density of the ceramic articles is usually in excess of 99% theoretical density and the hardness is greater than 20 GPa. The process was applied to manufacture ceramic cutting inserts of the above composition.

CERAMIC COMPOSITION FOR WEAR RESISTANT APPLICATIONS

A composition for hard, sintered, tough and wear resistant ceramic articles is described. The composition is comprised of alumina, titanium carbonitride and filaments of titanium diboride or titanium nitride. The ceramic articles made of this composition are isostatically hot pressed or sintered at high temperature in inert gas. The density of the ceramic articles is usually in excess of 99% theoretical density and the hardness is greater than 20 GPa. The process was applied to manufacture ceramic cutting inserts of the above composition.

CERAMIC MATERIAL

FS 1403 CERAMIC MATERIAL The invention relates to composite ceramic materials strengthened by the incorporation of ceramic fibres and to a method of making such materials. A novel composite ceramic material comprises an alumina matrix (11) containing mullite formations (12) formed from a colloidal silica filler and alumina fibres (10), part at least of the mullite growth (12) being on the surface of the fibres (10). The composite ceramic material is made by forming an aqueous slurry containing a dispersion of the fibres, filler, colloidal silica and rheological agents, forming the slurry to the desired shape and firing the product. The ceramic matrix material is particularly suitable for the manufacture of ceramic foam filters.

THE BONDING OF BODIES OF REFRACTORY HARD MATERIALS TO CARBONACEOUS SUPPORTS

Bodies (3) such as tiles, plates, slabs or bricks of Refractory Hard Material (RHM) or other refractory composites are bonded to the cathodes or to other components, in particular to a carbon cell bottom (1), of a cell for the production of aluminium by electrolysis of a cryolite-based molten electrolyte, made of carbonaceous or other electrically conductive refractory material, by a non-reactive colloidal slurry (4) comprising particulate performed RHM in a colloidal carrier selected from colloidal alumina, colloidal yttria and colloidal ceria. The slurry usually comprises preformed particulate TiB2 in colloidal alumina. The bodies (3) are usually TiB2-Al2O3 composites. The bonding is achieved simply by applying the slurry and allowing it to dry.

MOULDED SPHERICAL CERAMIC BODY, PRODUCTION PROCESS AND USE

The present invention concerns a moulded microcrystalline spherical Al2O3sintered body, process for its production as well as its use.

A METHOD FOR MANUFACTURING A CERAMIC COMPOSITE MATERIAL

The invention refers to a method of manufacturing a ceramic composite material comprising matrix and reinforcing materials and an intermediate weak interface material, said composite material being particularly intended for use at temperatures above 1400 ~C and in oxidizing environment, the matrix and reinforcing materials consisting of the same or different ceramic oxides having a melting point above 1600 ~C, and the interface material providing in combination with said materials a stress field liable to micro-cracking. The invention now suggests that the reinforcing fibre material is immersed into a powder slurry containing carbon (C) and ZrO2 so as to be coated thereby and then dried, after which the composite material is subjected to green forming and densification steps as known per se, and finally a heat-treatment in air leaving a porous structure of the interface material.

Self-lubricating material for micro-mechanical part, e.g. micro-bearing - comprising porous ceramic partly filled with solid, pref. lubricant, impregnated with liq. lubricant to reduce contact pressure and wear

Self-lubricating material (I) comprises a porous ceramic (II); a first solid (III), which is porous and is dispersed and partly fills the pores of (II); and a second liq. lubricant (IV), which is absorbed in the pores of (III) and (II) without filling (III). (III) is pref. a solid lubricant; and (IV) a perfluoropolyethylene oxide polyether (IVA), Pref. (II)/(III) combinations are Al2O3/graphite, Al2O3/BN and ZrO2/graphite. USE/ADVANTAGE - (I) is used for making micro-mechanical pts. (claimed), esp. sliding pts. of bearings, such as micro-bearing with a dia. of ca. 0.16 mm. Part of the lubricant extends to the surface of (I), reducing the local contact pressure and abrasive wear. (III) ensures that (II) has good bearing properties and facilitates absorption of (IV). If (III) consists of solid lubricant, any detached particles are lubricating.

Zunderfester und bei hohen Temperaturen korrosionsbeständiger Werkstoff

Verfahren zur Herstellung von Hartstoffen mit grosser spezifischer Oberfläche

Material for surgical prosthesis - comprising metal (oxide) FIBRE REINFORCED CERAMICS

Material comprises fibres esp. of W, Mo, Ta, Ti, metal oxide, carbide nitride, boride or of a metalloid such as C, B, etc., in a matrix of ceramic material, esp. pure Al2O3 or dental porcelain (K2O, Al2O3. 6SiO2). Esp. for hip joints but also suitable for dental protheses, bridges, and also esp. for tools for making plates corners and other prosthetic joints. The fibres improve the resistance to bending and fracture of the prostheses without affecting the biological passivity, the corrosion resistance or the compressive strength adversely. Use for tools avoids introduction of metal particles into threaded holes, meshes, etc. to cause harmful effects on the patient.

Methods and compositions for the preparation of ceramic articles.

Es sind Zusammensetzungen und Verfahren geschaffen, die zur Erzeugung von Keramikgegenständen, wie z.B. Kernen und Schalen für den Feinguss, nützlich sind. Die Zusammensetzung umfasst eine Flüssigkeit, die aufweist: eine Siloxanspezies; eine Vielzahl von Teilchen, die ein Keramikmaterial umfassen und innerhalb der Flüssigkeit angeordnet sind; ein Katalysatormaterial, das innerhalb der Flüssigkeit angeordnet ist; und ein Poren bildendes Mittel, das innerhalb der Flüssigkeit angeordnet ist. Das Poren bildende Mittel umfasst ein siliciumhaltiges Mittel, das in Bezug auf die Flüssigkeit im Wesentlichen inert ist und ein mittleres Molekulargewicht von weniger als etwa 1300 Gramm pro Mol aufweist. Das Verfahren umfasst ein Anordnen irgendeiner der vorstehend beschriebenen Zusammensetzungen in einer gewünschten Gestalt, Härten der Siloxanspezies und Verflüchtigen des Poren bildenden Mittels zum Bilden eines porösen Grünlings.

Self-lubricating material and method for manufacturing micromechanical parts made of this material.

Layer arrangement for e.g. hot gas path component of turbine, has substrate layer and ceramic matrix composite layer in between which non-metallic spacer is formed to define the pockets filled with heat insulating substances

The layer arrangement (100) has a substrate layer (102) and a ceramic matrix composite layer (104) in between which a non-metallic spacer (106) is formed to define the pockets. The substrate layer is formed with superalloy nickel-based or ceramic. The non-metallic spacer is provided with a thermal protecting coating and a cutting rib. The pockets are filled with the heat insulating substances. Independent claims are included for the following: (1) a hot gas path component; and (2) a method for manufacturing layer arrangement.

Hot gas path component assembly and method for producing a hot gas path component with a layer with a layer arrangement.

Es sind eine Heissgaspfadkomponente mit einer Schichtanordnung und ein Verfahren zum Herstellen einer Heissgaspfadkomponente mit einer Schichtanordnung offenbart. Die Schichtanordnung (100) enthält eine Substratschicht (102), eine Keramikmatrix-Verbundschicht (104) und einen nicht-metallischen Abstandshalter (106) zwischen der Substratschicht (102) und der Keramikmatrix-Verbundschicht (104), der eingerichtet ist, um eine oder mehrere Taschen auszubilden. Das Verfahren enthält ein Sichern eines nicht-metallischen Abstandshalters (106) zwischen einer Substratschicht (102) und einer Keramikmatrix-Verbundschicht (104) der Heissgaspfadkomponente mit einer Schichtanordnung.

Procédé de fabrication d'une pierre biseautée, notamment pour un mouvement d'horlogerie.

L'invention concerne un procédé de fabrication d'une pierre biseautée (8), notamment pour une pièce d'horlogerie, caractérisé en ce qu'il comporte les étapes suivantes : réalisation d'un précurseur à partir d'un mélange d'au moins un matériau en poudre avec un liant ; pressage du précurseur afin de former un corps vert, à l'aide d'une matrice supérieure et d'une matrice inférieure comprenant une nervure saillante, frittage dudit corps vert afin de former un corps (30) de la future pierre (8) dans ledit au moins un matériau, le corps (30) comprenant une face périphérique (37) et une face inférieure (32) munie d'une rainure (40), et usinage du corps (30) comportant une sous-étape de rabotage de la face périphérique (37) jusqu'à la rainure (40), de manière à ce qu'une paroi interne (42) de la rainure forme au moins une partie évasée de la face périphérique de la pierre (8), L'invention concerne aussi un système de fabrication d'une pierre biseautée comprenant différents dispositifs pour mettre ...

DOUBLE ADAPTER CONNECTION FOR JOINING CERAMICS WITH METALS

EXTRUSION METHOD FOR PRODUCTION OF PROPPING AGENT

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.

Precision pressing and sintering of cutting inserts, particularly indexable cutting inserts

A ready-for-use ceramic produced by sintering a blank and comprising an upper and a lower face, both of which have a support surface for mounting in a clamp mounting of a cutting tool, lateral faces connecting the upper and lower faces, and cutting edges which have chamfers.

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.

Luminescent Ceramic Composite Converter and Method of Making the Same

A luminescent converter for a light emitting element (e.g., LED) includes a transparent, sol-gel-derived ceramic matrix having particles of at least one type of phosphor embedded therein that change a wavelength of the input light to light that has a different wavelength. The ceramic matrix is 20-80% porous with a majority of the pores having a diameter in a range of 2-20 nm. A method of making this converter includes preparing a sol-gel ceramic matrix embedded with the particles of phosphor in the matrix, and drying the matrix at no more than 600° C. to form the converter.

Extrusion Process For Proppant Production

An extrusion method and apparatus are described for producing ceramics, glass, glass-ceramics, or composites suitable for use as proppants. The method includes forming one or more green body materials, extruding the green body materials to form a green body extrudate, separating and shaping the green body extrudate into individual green bodies, and sintering the green bodies to form proppants. The apparatus includes a means for forming an intimate mixture of green body materials, means to produce a green body extrudate, means for separating and shaping the green body extrudate into individual green bodies, and means to sinter the green green bodies to form proppants.

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.

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.

Alumina-Based Ceramic Materials and Process for the Production Thereof

The present invention provides a process for producing a ceramic material, which comprises: (a) forming a green compact by compacting a powder comprising alumina and carbon, wherein the powder is substantially free of silicon carbide and wherein the amount of carbon present in the powder does not exceed 0.1% by weight of the powder; and (b) sintering the green compact under non-oxidising conditions to form a ceramic material comprising alumina and carbon, wherein the green compact is sintered at a temperature of less than 1550° C. Ceramic materials obtainable by said process are also provided. 1. A process for producing a ceramic material , which comprises:(a) forming a green compact by compacting a powder comprising alumina and carbon, wherein the powder is substantially free of silicon carbide and wherein the amount of carbon present in the powder does not exceed 0.1% by weight of the powder; and(b) sintering the green compact under non-oxidising conditions to form a ceramic material comprising alumina and carbon, wherein the green compact is sintered at a temperature of less than 1550° C.2. A process according to claim 1 , wherein the powder comprises alumina particles having an average diameter of from about 1 nm to about 1 μm.3. A process according to claim 1 , wherein the powder contains carbon in the form of carbon particles.4. A process according to claim 3 , wherein the carbon particles have an average diameter of from about 1 nm to about 1 μm.5. A process according to claim 4 , wherein the particles are in the form of graphite particles.6. A process according to claim 1 , wherein the powder contains carbon in the form of an organic precursor.7. A process according to claim 1 , wherein carbon is present in the powder in an amount of from about 0.01% to about 0.05% by weight of the powder.8. A process according to claim 1 , wherein the green compact is sintered at a temperature of from about 1350° C. to about 1500° C.9. A process according to claim 1 , ...

Semiconductive ceramic sintered compact

There is provided a semiconductive ceramic sintered compact that has a conductivity high enough to attain static electricity removal and antistatic purposes and, at the same time, has excellent mechanical properties or stability over time. The semiconductive ceramic sintered compact includes a main phase and a conductive phase present between the main phases, wherein the main phase is a ceramic sintered phase including Al 2 O 3 particles, the area ratio of the conductive phase to the main phase is 0% (exclusive) to 10% (inclusive), and the conductive phase includes two or more metals selected from Mn (manganese), Fe (iron), and Ti (titanium) and has a composition meeting a relation of Mn/(Ti+Mn+Fe)>0.08 or Mn/Ti>0.15.

Component, in particular for a fitting, a piece of furniture and/or a domestic appliance, method for producing a component, and a fitting, piece of furniture and/or domestic appliance

A component for one or more of a fitting, a piece of furniture, and a domestic appliance. The component includes a formed body including one or more of a hard-material-containing composite, a metal-ceramic composite, and a hard material. A method of producing the component includes providing the formed body and shaping it by thermal spraying or mechanical forming.

Nanotape and nanocarpet materials

Provided are nanostructure-containing nanotape materials. The materials may be incorporated at the interface between two other structures to provide strength and toughness at the interface. The materials may also be applied to a standalone structure to provide strength and toughness. Also provided are related methods of fabricating the nanotape materials, as well as gas diffusion membranes and fuel cells that include nanostructured materials.

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.

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.

Method for the production of a part made from a composite material

A method of fabricating a composite part, includes forming a fiber preform for the part that is to be obtained by depositing a plurality of fiber structures impregnated with a thermoplastic polymer onto a surface, with deposition being performed by automated fiber placement; eliminating the thermoplastic polymer present in the preform by dissolution with a solvent; and injecting a liquid impregnation composition into the pores of the fiber preform after eliminating the thermoplastic polymer in order to form a matrix in the pores of the fiber preform.

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.

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. 1123-. (canceled)124. A multilayer , comprising:a first layer comprising an unsintered lithium-stuffed garnet polycrystalline thin film, wherein the thickness of the first layer is less than 100 μm and greater than 10 nm; anda second layer comprising a metal foil or metal powder, wherein the second layer is in contact with the first layer, and wherein the metal foil or metal powder comprises a metal selected from nickel (Ni), copper (Cu), an alloy thereof, and a combination thereof.125. The multilayer of claim 124 , further comprising a third layer comprising an unsintered lithium-stuffed garnet polycrystalline thin film claim 124 , wherein the thickness of the third layer is less than 100 μm and greater than 10 nm claim 124 , wherein the second layer is between and in contact with the first ...

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.

CERAMIC SUBSTRATE AND SUSCEPTOR

A ceramic substrate made of a dielectric material including silicon carbide particles, which is used as a forming material, in which the number of the silicon carbide particles per unit area on the surface of the substrate is smaller than the number of the silicon carbide particles per unit area in a cross section of the substrate. 1. A ceramic substrate which is made of a dielectric material including silicon carbide particles as a forming material ,wherein the number of the silicon carbide particles per unit area on a surface of the substrate is smaller than the number of the silicon carbide particles per unit area in a cross section of the substrate.2. The ceramic substrate according to claim 1 , wherein an average particle diameter of the silicon carbide particles is 0.2 μm or less.3. A susceptor comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the ceramic substrate according to ,'}wherein a surface of the ceramic substrate is a mounting surface on which a plate-shaped sample is mounted.4. An electrostatic chuck device comprising: [{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the ceramic substrate according to as a mounting plate,'}, 'a supporting plate,', 'an electrostatic attraction electrode provided between the ceramic substrate and the supporting plate, and', 'an insulating material layer that insulates surroundings of the electrostatic attraction electrode;, 'an electrostatic chuck part which includes'}a temperature adjusting base part; andan adhesive layer provided between the electrostatic chuck part and the temperature adjusting base part.5. The ceramic substrate according to claim 1 , wherein the dielectric material includesaluminum oxide particles or yttrium oxide particles having an average crystal grain size of 5 μm or less, as a main phase, andsilicon carbide particles having an average particle diameter of 0.2 μm or less, as a sub-phase.6. The ceramic substrate according to claim 1 , wherein the ceramic substrate is formed by a ...

ELECTROSTATIC CHUCK DEVICE AND METHOD FOR MANUFACTURING SAME

This electrostatic chuck device () includes a base () having one main surface serving as a mounting surface () on which a plate-shaped sample is mounted, and an electrode for electrostatic attraction () provided on the side opposite to the mounting surface () in the base (), in which the base () consists of a ceramic material as a forming material, and the ceramic material contains aluminum oxide and silicon carbide as main components thereof, and has a layered graphene present at a grain boundary of the aluminum oxide. 1. An electrostatic chuck device comprising:a base having one main surface serving as a mounting surface on which a plate-shaped sample is mounted; andan electrode for electrostatic attraction provided on a side opposite to the mounting surface in the base,wherein the base consists of a ceramic material, andthe ceramic material is a sintered body containing aluminum oxide and silicon carbide as main components thereof and having a layered graphene present at a grain boundary of the aluminum oxide.2. The electrostatic chuck device according to claim 1 ,wherein the sintered body further contains β-SiC type silicon carbide.3. The electrostatic chuck device according to claim 1 ,wherein a relative dielectric constant of the ceramic material at a frequency of 10 Hz is 12.3 or more, and a relative dielectric constant of the ceramic material at a frequency of 1 MHz is 12.5 or less.4. A method for manufacturing the electrostatic chuck device according to claim 1 , the method comprising:a step of heating a formed body obtained by forming granules composed of mixed particles of aluminum oxide particles and silicon carbide particles, at a temperature of 500° C. or lower with a rate of temperature rise of 0.3° C./min or more; anda step of sintering the formed body, which has been treated in the step of heating to form a sintered body containing aluminum oxide and silicon carbide as main components thereof and having a layered graphene present at a grain boundary ...

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

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.

COMPOSITE SINTERED BODY, ELECTROSTATIC CHUCK MEMBER, ELECTROSTATIC CHUCK DEVICE, AND METHOD FOR PRODUCING COMPOSITE SINTERED BODY

A composite sintered body is a ceramic composite sintered body which includes metal oxide which is a main phase, and silicon carbide which is a sub-phase, in which crystal grains of the silicon carbide are dispersed in crystal grains of the metal oxide and at crystal grain boundaries of the metal oxide, and a proportion of the crystal grains of the silicon carbide dispersed in the crystal grains of the metal oxide is 25% or more in an area ratio with respect to a total crystal grains of the silicon carbide. 1. A composite sintered body which is a ceramic composite sintered body , comprising:a metal oxide which is a main phase; andsilicon carbide which is a sub-phase,wherein crystal grains of the silicon carbide are dispersed in crystal grains of the metal oxide and at crystal grain boundaries of the metal oxide, anda proportion of the crystal grains of the silicon carbide dispersed in the crystal grains of the metal oxide is 25% or more in an area ratio with respect to a total crystal grains of the silicon carbide.2. The composite sintered body according to claim 1 , wherein the metal oxide is aluminum oxide or yttrium oxide.3. The composite sintered body according to claim 1 , wherein an average crystal grain size of the metal oxide is 1.2 μm or more and 10 μm or less.4. An electrostatic chuck member comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a plate-shaped base which is formed of, as a forming material, the composite sintered body according to , the base having one principal surface which is a placing surface on which a plate-shaped sample is placed; and'}an electrostatic attraction electrode provided on a side opposite to the placing surface of the base, or in an interior of the base.5. An electrostatic chuck device comprising:{'claim-ref': {'@idref': 'CLM-00004', 'claim 4'}, 'the electrostatic chuck member according to .'}6. A method for producing a composite sintered body claim 1 , comprising:a step of mixing metal oxide particles and silicon ...

Uniform Dispersing of Graphene Nanoparticles in a Host

The present invention includes a simple, scalable and solventless method of dispersing graphene into polymers, thereby providing a method of large-scale production of graphene-polymer composites. The composite powder can then be processed using the existing techniques such as extrusion, injection molding, and hot-pressing to produce a composites of useful shapes and sizes while keeping the advantages imparted by graphene. Composites produced require less graphene filler and are more efficient than currently used methods and is not sensitive to the host used, such composites can have broad applications depending on the host's properties.

METHOD OF PRODUCING ALUMINA CERAMICS REINFORCED WITH OIL FLY ASH

A method for making ceramic composites via sintering a mixture of alumina and oil fly ash. The alumina is in the form of nanoparticles and/or microparticles. The oil fly ash may be treated with an acid prior to the sintering. The composite may comprise graphite carbon derived from oil fly ash dispersed in an alumina matrix. The density, mechanical performance (e.g. Vickers hardness, fracture toughness), and thermal properties (e.g. thermal expansion, thermal conductivity) of the ceramic composites prepared by the method are also specified. 1: A method of producing a composite comprising oil fly ash dispersed in an alumina matrix , the method comprising:mixing oil fly ash and alumina to form a mixture; andsintering the mixture thereby producing the composite,wherein:a weight ratio of the alumina to the oil fly ash is in a range of 9:1 to 500:1; andthe sintering comprises applying a uniaxial pressure ranging from 30-80 MPa to the mixture.2: The method of claim 1 , wherein the mixing involves sonication.3: The method of claim 1 , wherein the sintering is a spark plasma sintering process.4: The method of claim 1 , wherein the sintering is performed at a temperature ranging from 1 claim 1 ,200-1 claim 1 ,600° C.5: The method of claim 4 , wherein the sintering is performed with a holding time ranging from 5-60 minutes.6: The method of claim 1 , wherein the sintering comprises heating the mixture at a heating rate ranging from 50-150° C./min.7: The method of claim 1 , wherein the oil fly ash is treated with an acid prior to the mixing.8: The method of claim 1 , wherein the oil fly ash is devoid of nickel claim 1 , iron claim 1 , and vanadium.9: The method of claim 1 , wherein the oil fly ash is in the form of porous particles with an average particle size of 5-60 μm.10: The method of claim 9 , wherein the porous particles are spherical.11: The method of claim 1 , wherein the alumina comprises α-AlO.12: The method of claim 1 , wherein the alumina is in the form of particles ...

Method of making ceramic matrix slurry infused ceramic tows and ceramic matrix composites

Methods of making ceramic matrix prepregs are described. The methods include exposing a coated tow of ceramic fibers to a ceramic matrix slurry comprising a solvent and ceramic precursor. The coating is at least partially removed and the slurry infuses into the ceramic fibers to form prepreg. Steps to form ceramic matrix composites are also described, including forming the prepreg into a green body, and sintering the ceramic precursor.

CERAMIC MATERIAL AND ELECTROSTATIC CHUCK DEVICE

Provided is a composite sintered body for an electrostatic chuck, which is not easily broken even if it is exposed to high-power plasma. Further, provided are an electrostatic chuck device using such a composite sintered body for an electrostatic chuck and a method of manufacturing a composite sintered body for an electrostatic chuck. The composite sintered body for an electrostatic chuck is a composite sintered body including an insulating ceramic and silicon carbide, in which crystal grains of the silicon carbide are dispersed in at least one selected from the group consisting of a crystal grain boundary and a crystal grain of a main phase formed by sintering crystal grains of the insulating ceramic. 1. A ceramic material that is a composite sintered body including an insulating ceramic and silicon carbide ,wherein crystal grains of the silicon carbide are dispersed in at least one selected from the group consisting of a crystal grain boundary and a crystal grain of a main phase formed by sintering crystal grains of the insulating ceramic,a content of crystal grains having a β-SiC type crystal structure is more than 60% by volume with respect to a total amount of the crystal grains of the silicon carbide,the composite sintered body includes pores which are present in a crystal grain boundary, anda ratio of an apparent density of the composite sintered body with respect to a hypothetical true density when the composite sintered body is assumed not to include the pores is 97% or more.2. The ceramic material according to claim 1 ,wherein the ceramic material includes a portion in which the crystal grains having the β-SiC type crystal structure are sintered with each other.3. The ceramic material according to claim 1 ,wherein a grain diameter obtained from an X-ray diffraction result of the crystal grain of the silicon carbide is 50 nm or more.4. The ceramic material according to claim 1 ,wherein the insulating ceramic is aluminum oxide.5. A ceramic material which is ...

Method of densifying a ceramic matrix composite using a filled tackifier

A method of producing an enhanced ceramic matrix composite includes applying a tackifier compound to a fiber preform. The tackifier compound includes inorganic filler particles. The method further includes modifying the tackifier compound such that the inorganic filler particles remain interspersed throughout the fiber preform, and occupy pores of fiber preform.

HEAT-RESISTANT MEMBER

A heat-resistant member of the present disclosure is formed of an alumina-based ceramic containing alumina crystals and a glass formed of Si, Ca, Mg, and O, and an area ratio occupied by the glass in an inner portion is larger than an area ratio occupied by the glass in the surface portion. 1. A heat-resistant member comprisingan alumina-based ceramic containing alumina crystals and a glass formed of Si, Ca, Mg, and O,wherein an area ratio occupied by the glass in an inner portion is larger than an area ratio occupied by the glass in a surface portion.2. The heat-resistant member according to claim 1 , wherein the area ratio occupied by the glass in the inner portion is larger than the area ratio occupied by the glass in the surface portion by 4 area % or more.3. The heat-resistant member according to claim 1 , wherein the area ratio occupied by the glass in the surface portion is 20 area % or less.4. The heat-resistant member according to claim 1 , wherein an average equivalent circle diameter of the alumina crystals in the surface portion is smaller than an average equivalent circle diameter of the alumina crystals in the inner portion.5. The heat-resistant member according to claim 1 , wherein a mean distance between centers of gravity of the alumina crystals in the surface portion is less than a mean distance between centers of gravity of the alumina crystals in the inner portion. The present disclosure relates to a heat-resistant member.A heat-resistant member that is less likely to be damaged even when used at a temperature of approximately 600° C. is used in a product that is assumed to be used at high temperatures, such as a heater used for heating the interior of a vehicle, for example.Here, as a material of the heat-resistant member, an alumina-based ceramic that is resistant to oxidation even at a temperature of approximately 600° C. in an atmospheric environment and that can be used for a long period of time is widely employed (see Patent Document 1, for ...

Porous shaped metal-carbon products

The present invention provides a porous metal-containing carbon-based material that is stable at high temperatures under aqueous conditions. The porous metal-containing carbon-based materials are particularly useful in catalytic applications. Also provided, are methods for making and using porous shaped metal-carbon products prepared from these materials.

DIELECTRIC MATERIAL AND ELECTROSTATIC CHUCKING DEVICE

A dielectric material includes a composite sintered body in which conductive particles are dispersed in an insulating material, in which a dielectric constant at a frequency of 40 Hz is 10 or higher, and a difference between a maximum dielectric loss value and a minimum dielectric loss value at a frequency of 1 MHz in a surface of the composite sintered body is 0.002 or less. 1. A dielectric material , whereinthe dielectric material is a composite sintered body in which conductive particles are dispersed in an insulating material,a dielectric constant of the dielectric material at a frequency of 40 Hz is 10 or higher, anda difference between a maximum value and a minimum value of dielectric loss of the dielectric material wherein the dielectric loss is measured at a frequency of 1 MHz on the surface of the composite sintered body is 0.002 or less.2. The dielectric material according to claim 1 ,{'sup': '13', 'wherein a volume resistivity at 20° C. of the dielectric material is 10Ω·cm or higher, and'}a withstand voltage at 20° C. of the dielectric material is 5 kV/mm or higher.3. The dielectric material according to claim 1 ,{'sup': '13', 'wherein a volume resistivity at 120° C. of the dielectric material is 10Ω·cm or higher, and'}a withstand voltage at 20° C. of the dielectric material is 5 kV/mm or higher.4. The dielectric material according to claim 1 ,wherein a thermal conductivity of the dielectric material is 20 W/m·K or higher.5. The dielectric material according to claim 1 ,wherein dielectric loss at a frequency of 40 Hz of the dielectric material is 0.01 or higher and 0.05 or lower.6. An electrostatic chuck device comprisinga base having a main surface on which a plate-like sample is electrostatically attracted,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'wherein the base is formed of the dielectric material according to .'}7. The dielectric material according to claim 1 ,wherein the insulating material is an insulating ceramic.8. The dielectric ...

Honeycomb catalyst and exhaust gas purifying apparatus

A honeycomb catalyst includes a honeycomb unit. The honeycomb unit has a plurality of through holes that are arranged in parallel in a longitudinal direction and partitions that are provided between the plurality of through holes. The honeycomb unit includes a zeolite, inorganic particles, and an inorganic binder. The zeolite includes a CHA-structured aluminosilicate having a Si/Al ratio of about 15 to about 50. The inorganic particles includes an oxide that has a positive coefficient of thermal expansion. A volume ratio of the zeolite to the inorganic particles is about 50:about 50 to about 90:about 10.

PRE-STRESSED CURVED CERAMIC PLATES/TILES AND METHOD OF PRODUCING SAME

A pre-stressed curved plate comprising a curved plate having at least one concave surface, the curved plate being enveloped and adhesively bonded with tensioned reinforcing fibers, whereby the reinforcing fibers are first wound around the plate under tension being spaced apart from the concave surface and subsequently subjected to pressure to stretch and bond the reinforcing fibers to the surfaces of the plate, where upon bonding, the tensile strain of the fiber introduces stress in the plate. 1. A pre-stressed curved plate comprising:a curved ceramic plate having at least one concave surface; andreinforcing fibers that are wound around the ceramic plate,wherein the reinforcing fibers are under tension and adhesively bonded thereto, whereby the curved ceramic plate is maintained under compression stress.2. The curved plate in accordance with claim 1 , wherein the curved ceramic plate is a ceramic tile.3. The curved plate in accordance with claim 2 , wherein the ceramic plate is made of aluminum oxide (Al2O3); hot pressed claim 2 , sintered or reaction bonded boron carbide (B4C); silicon carbide (SiC); boron silicon carbide (BSC);titanium diboride (Ti B2); aluminum nitride; silicon nitride; and glass-ceramic, or combinations thereof.4. The curved plate in accordance with claim 1 , wherein the ceramic plate has a thickness between 3-30 mm.5. The curved plate in accordance with claim 1 , wherein the reinforcing fibers are selected from aramid claim 1 , poly(p-phenylene-2 claim 1 , 6-benzobisoxazole) claim 1 , S or E glass claim 1 , carbon claim 1 , thermoplastics (polyamide claim 1 , HMWPE claim 1 , polyethylene claim 1 , polypropylene) or metal (boron claim 1 , steel claim 1 , aluminum) fibers or their combination.6. The curved plate in accordance with claim 1 , wherein the adhesive is selected from epoxy claim 1 , phenolic claim 1 , thermoplastic claim 1 , thermosetting adhesives claim 1 , rubber or elastomer based adhesives and ceramic adhesives.7. The curved plate ...

EROSION-RESISTANT CERAMIC MATERIAL, POWDER, SLIP AND COMPONENT

The use of magnesium oxide, reactive alumina and aluminium oxide as a base provides for a new erosion-resistant material upon sintering. 1. A powder comprising (in % by weight):aluminum oxide in an amount of from 92.0% to <99.0%; andspinel in a proportion of 8.0%-1.0%.2. A powder comprising (in % by weight):from 96.0% to 99.9% of aluminum oxide; andreactive magnesium oxide in an amount of from 0.1% to 4.0%, to form spinel with the aluminum oxide present.3. The powder as claimed in claim 1 , which contains γ′-aluminum oxide.4. The powder as claimed in claim 1 , which contains α-alumina as aluminum oxide.5. The powder as claimed in claim 1 , which contains tabular aluminas as aluminum oxide.6. The powder as claimed in claim 1 , which contains reactive alumina as aluminum oxide as an additive for reducing a water content and for improving a processability in a ceramic slip claim 1 , in a proportion of from 10% by weight to 25% by weight.7. The powder as claimed in claim 5 , wherein the tabular alumina has at least three different particle size fractions.8. The powder as claimed in claim 6 , wherein the reactive alumina has at least two different particle size fractions.9. The powder as claimed in claim 5 , wherein the tabular aluminas have a maximum particle size of up to 10 mm.10. The powder as claimed in claim 2 , wherein the reactive magnesium oxide has a citric acid activity of from 10 seconds to 250 seconds.11. A ceramic produced using a powder as claimed in claim 1 , comprising at least (in % by weight):aluminum oxide as matrix material in an amount of from 92.0% to <99.0%; andspinel in a proportion of 8.0%-1.0%.12. The ceramic as claimed in claim 11 , wherein aluminum oxide is present as α-alumina.13. The ceramic as claimed in claim 11 , wherein aluminum oxide is present as tabular aluminas.14. The ceramic as claimed in claim 11 , wherein aluminum oxide is present as reactive alumina in order to reduce a water content and to improve a processability in a ceramic ...

ALUMINA-BASED FILLING SAND FOR SLIDING NOZZLE

An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an AlOcomponent. 1. An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand , wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an AlOcomponent.2. The alumina-based filling sand for sliding nozzle of claim 1 , wherein the alumina sand has 8 wt % or less of FeO.3. The alumina-based filling sand for sliding nozzle of claim 1 , wherein the alumina sand has an average particle diameter within a range from 0.2 to 1.0 mm.4. The alumina-based filling sand for sliding nozzle of claim 1 , wherein the silica sand had an average particle diameter within a range from 0.2 to 1.0 mm.5. The alumina-based filling sand for sliding nozzle of claim 1 , wherein the silica sand and the alumina sand both are coated with carbon claim 1 , or either the silica sand or the alumina sand is coated with carbon.6. The alumina-based filling sand for sliding nozzle of claim 1 , wherein the alumina sand has surface irregularities of 1.2 or less. The present invention relates to alumina-based filling sand for sliding nozzle. More specifically, the present invention relates to the alumina-based filling sand for sliding nozzle that forms an opening where the filling sand falls through smoothly without being molten and sintered by a molten metal (molten steel) poured into a ladle used in a steel mill and that does not allow the molten steel to permeate into the filling sand (in other words, the sand itself in a sliding nozzle is not melted and sintered by the molten steel and does not allow the molten steel to permeate into gaps between sand particles).A ladle for receiving molten ...

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

Disclosed 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 disclosed herein are lithium-stuffed garnet thin films having fine grains therein. Also disclosed herein are 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 electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Also disclosed herein are methods for preparing 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 disclosed herein are sintering techniques, e.g., for heating and/or field assisted (FAST) sintering, for solid state energy storage devices and the components thereof. 21. (canceled)22. A sintered film comprising:a first layer comprising a sintered lithium-stuffed garnet; anda second layer interfacing the first layer, the second layer comprising a sintered metal;wherein the sintered film thickness is less than 200 μm and greater than 1 nm.23. The film of claim 22 , wherein the lithium-stuffed garnet comprises at least one member selected from the group consisting of LiLaM′M″ZrO claim 22 , LiLaM′M″TaO claim 22 , and LiLaM′M″NbO claim 22 , wherein 4 Подробнее

Composites of sintered Mullite reinforced corundum granules and method for its preparation

The present disclosure relates to a composite of sintered mullite reinforced corundum granules and a method for its preparation. The composite comprises mullite and corundum in an interlocking microstructure. The process for preparing the composite involves the steps of admixing the raw materials followed by sintering to obtain the composite comprising sintered mullite reinforced corundum granules. 1. A composite of sintered mullite reinforced corundum granules , comprising 6 to 80 wt % of mullite and 10 to 90 wt % of corundum , having particle size ranging from 0.25 mm to 1.5 mm;wherein, the mullite is obtained from clay and corundum is obtained from alumina ore; andwherein, the mullite and the corundum in the composite have an interlocking microstructure.2. The composite as claimed in claim 1 , wherein the clay is Kaolin.3. The composite as claimed in claim 1 , wherein the alumina ore is at least one selected from the group consisting of bauxite and aluminum trihydroxide.4. A method for preparing a composite of sintered mullite reinforced corundum granules comprising the following steps:a) grinding raw materials comprising at least one clay and at least one alumina ore, to obtain ground raw materials having particle size less than 45 microns;b) admixing the ground raw materials to obtain an admixture;c) granulating the admixture in the presence of at least one binder and optionally at least one additive to obtain granulated pellet; andd) sintering the granulated pellet in the temperature range of 1300° C. to 1600° C. to obtain the composite comprising sintered mullite reinforced corundum granules.5. The method as claimed in claim 4 , wherein the binder is at least one selected from the group consisting of bentonite claim 4 , starch and polyvinyl alcohol.6. The method as claimed in claim 4 , wherein the additive comprises at least one fluxing agent selected from the group consisting of potash feldspar and iron ore slime.7. The method as claimed in claim 4 , wherein ...

CERAMIC CORE COMPOSITIONS, METHODS FOR MAKING CORES, METHODS FOR CASTING HOLLOW TITANIUM-CONTAINING ARTICLES, AND HOLLOW TITANIUM-CONTAINING ARTICLES

The disclosure relates generally to core compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to core compositions and methods for casting hollow titanium-containing articles, and the hollow titanium-containing articles so molded. 1. A ceramic core composition comprising calcium aluminate particles and one or more large scale particles.2. The composition of claim 1 , wherein the composition comprises fine scale calcium aluminate and wherein said large particles are hollow.3. The composition of claim 1 , wherein the calcium aluminate particles comprise particles of calcium monoaluminate.4. The composition of claim 1 , wherein the calcium aluminate particles comprise particles of calcium monoaluminate claim 1 , and calcium dialuminate.5. The composition of claim 1 , wherein the calcium aluminate particles comprise particles of calcium monoaluminate claim 1 , calcium dialuminate claim 1 , and mayenite.6. The composition of claim 1 , further comprising calcium aluminate with a particle size of less than about 50 microns.7. The composition of claim 1 , wherein large scale particles comprise hollow oxide particles.8. The composition of claim 1 , wherein said large scale particles are hollow and they comprise aluminum oxide particles claim 1 , magnesium oxide particles claim 1 , calcium oxide particles claim 1 , zirconium oxide particles claim 1 , titanium oxide particles claim 1 , or combinations thereof.9. The composition of claim 1 , wherein said large scale particles comprise a ceramic claim 1 , such as calcium aluminate claim 1 , calcium hexaluminate claim 1 , zirconia claim 1 , or combinations thereof.10. The composition of claim 7 , wherein said hollow oxide particles comprise hollow alumina spheres.11. The composition of claim 1 , wherein said large scale particles comprise particles that are more than about 70 microns in outside dimension.12. The composition of claim 1 , wherein the large scale particles ...

WEAR-RESISTANT COATING

A method of coating an object, the method comprising: preparing a suspension comprising graphene nanoplatelets and a ceramic material; and spraying the suspension onto the object using high velocity oxy-fuel, HVOF, spraying in which the suspension is introduced as a feedstock. 1. A method of coating an object , the method comprising:preparing a suspension comprising graphene nanoplatelets and a ceramic material; andspraying the suspension onto the object using high velocity oxy-fuel, HVOF, spraying in which the suspension is introduced as a feedstock.2. The method of claim 1 , wherein the suspension comprises graphene nanoplatelets having a thickness in the range 4 nm to 25 nm.3. The method of claim 1 , wherein the suspension comprises graphene nanoplatelets having an average thickness in the range 5 nm to 10 nm claim 1 , or in the range 6 nm to 8 nm.4. The method of claim 1 , wherein the suspension comprises graphene nanoplatelets having an average diameter in the range 1 μm to 7 μm claim 1 , or in the range 4 μm to 6 μm.5. The method of claim 1 , wherein the ceramic material is or comprises alumina; and/or gamma-phase alumina.6. (canceled)7. The method of claim 5 , wherein after SHVOF spraying the ceramic material comprises at least 50 wt % or at least 70 wt % or at least 90 wt % gamma-phase alumina.8. The method of claim 1 , wherein the wt % of graphene nanoplatelets in the suspension is in the range 1% to 30% of the wt % of the ceramic material in the suspension.9. The method of claim 1 , wherein spraying the suspension using SHVOF spraying comprises injecting the suspension into a flame claim 1 , and wherein the ratio of flame power to injection flow rate of the suspension is between 0.5 and 1.5 kW(ml/min) claim 1 , or between 0.8 and 1.2 kW(ml/min)and/or ii) the flame has a flame power between 80 kW and 120 kW.10. (canceled)11. The method of any preceding claim claim 1 , wherein preparing the suspension comprises:preparing a first suspension comprising the ...

Additive manufacturing of ceramic turbine components by transient liquid phase bonding using metal or ceramic binders

A ceramic turbine component is formed by a process including mixing a ceramic powder with an inorganic binder powder. The powder mixture is then formed into a turbine component that is subsequently densified by transient liquid phase sintering. In an embodiment, the turbine component may be formed by an additive manufacturing process such as selective laser sintering.

ALUMINA CERAMIC

Provided is an alumina ceramic with a low secondary electron emission coefficient and suitable for components of a high frequency generator, a plasma generator and so on. The alumina ceramic contains alumina as a main component, and at least two kinds of elements selected from an alkaline earth metal and from an element belonging to period 3, 4 or 5. The alkaline earth metal and the element belonging to period 3, 4 or 5 have a higher first ionization energy than aluminum. An electronegativity difference between the alkaline earth metal and the element belonging to period 3, 4 or 5 is 0 or more and 0.6 or less. A ratio (x/y) of the grain boundary area (x) to the grain area (y) in the alumina ceramic is 0.0001 to 0.001. 1. An alumina ceramic comprising alumina as a main component , and at least two kinds of elements selected from an alkaline earth metal and from an element belonging to period 3 , 4 or 5 , whereinthe alkaline earth metal and the element belonging to period 3, 4 or 5 have a higher first ionization energy than aluminum,an electronegativity difference between the alkaline earth metal and the element belonging to period 3, 4 or 5 is 0 or more and 0.6 or less, anda ratio (x/y) of the grain boundary area (x) to the grain area (y) in the alumina ceramic is 0.0001 to 0.001.2. The alumina ceramic according to claim 1 , wherein the density is 3.8 g/cmor more and 4.0 g/cmor less.3. The alumina ceramic according to claim 1 , wherein the alumina ceramic is used in a high frequency generator and a plasma generator.4. The alumina ceramic according to claim 2 , wherein the alumina ceramic is used in a high frequency generator and a plasma generator. The present invention relates to alumina ceramic used as components of a high frequency generator and a plasma generator.Dielectric ceramic is used as components of a high frequency generator and a plasma generator. Utilization of the dielectric ceramics has recently become popular in a region of 3 GHz or higher, and low ...

Systems and Methods for Thermally Processing CMC Components

Systems and methods for thermally processing composite components are provided. In one exemplary aspect, a system includes a thermal system, a mover device, and a control system. The system also includes a plurality of vessels in which one or more components may be placed. The vessels are similarly shaped and configured. A vessel containing the one or more components therein may be mounted into a chamber defined by the thermal system during thermal processing. The thermal system and vessels include features that allow components to be thermally processed, e.g., compacted, burnt-out, and densified via a melt-infiltration process, a polymer impregnation and pyrolyzing process, or a chemical vapor infiltration process. utilizing the same thermal system and common vessel design. The control system may control the thermal system and mover device to automate thermal processing of the composite components. 19.-. (canceled)10. A system for manufacturing a composite component , the system comprising:a thermal system defining a chamber;a plurality of vessels each removably mountable within the chamber, wherein the composite component is removably insertable into a volume of any one of the plurality of vessels;a mover device for inserting and removing the composite component into and from any one of the plurality of vessels and mounting and removing any one of the plurality of vessels to and from the chamber of the thermal system; control the mover device to mount a first vessel of the plurality of vessels having the composite component in a first state into the chamber of the thermal system;', 'activate the thermal system to perform a first thermal process to transition the composite component from the first state to a second state;', 'control the mover device to remove the first vessel having the composite component in the second state from the chamber of the thermal system;', 'control the mover device to insert the composite component in the second state into a second ...

EROSION-RESISTANT CERAMIC MATERIAL, POWDER, SLIP AND COMPONENT

The use of magnesium oxide, reactive alumina and aluminium oxide as a base provides for a new erosion-resistant material upon sintering. 1. A powder comprising (in % by weight):from 96.0% to 99.9% of aluminum oxide; andreactive magnesium oxide in an amount of from 0.1% to 4.0%, to form spinel with the aluminum oxide present.2. The powder as claimed in claim 1 , wherein the reactive magnesium oxide has a citric acid activity of from 10 seconds to 250 seconds.3. A ceramic produced using the powder as claimed in claim 1 , comprising at least (in % by weight):aluminum oxide as matrix material in an amount of from 92.0% to <99.0%; andspinel in a proportion of 8.0%-1.0%.4. The ceramic as claimed in claim 3 , wherein aluminum oxide is present as α-alumina.5. The ceramic as claimed in claim 3 , wherein aluminum oxide is present as tabular aluminas.6. The ceramic as claimed in claim 3 , wherein aluminum oxide is present as reactive alumina to reduce a water content and to improve a processability in a ceramic slip.7. A component comprising the ceramic as claimed in or produced from a powder or a slip.8. The component as claimed in claim 7 , wherein 90% of pores are smaller than 5 μm.9. The component as claimed in comprising aluminum oxide and spinel. This application is a divisional application of U.S. application Ser. No. 16/466,070, filed Jun. 03, 2019, and entitled “EROSION-RESISTANT CERAMIC MATERIAL, POWDER, SLIP AND COMPONENT,” which claims priority to PCT Application No. PCT/EP2017/078718, having a filing date of Nov. 9, 2017, which is based on German Application No. 10 2016 224 443.4, having a filing date of Dec. 8, 2016, the entire contents all of which are hereby incorporated by reference.The following relates to an erosion-resistant ceramic material, a powder, slip and a component.Ceramic heat shields (CHS) as example of components made of ceramic material display corrosion and erosion on the hot gas side during use. This process is due to the corrosion of the ...

PREPARATION METHOD FOR CERAMIC COMPOSITE MATERIAL, CERAMIC COMPOSITE MATERIAL, AND WAVELENGTH CONVERTER

Provided is a ceramic composite material and a wavelength converter. The ceramic composite material includes: an alumina matrix, a fluorescent powder uniformly distributed in the alumina matrix, and scattering centers uniformly distributed in the alumina matrix, wherein the alumina matrix is an alumina ceramics, the scattering centers are alumina particles, the alumina particles each have a particle diameter of 1 μm to 10 μm, and the fluorescent powder has a particle diameter of 13 μm to 20 μm.

Method for preparing continuous fiber-reinforced ceramic matrix composite by flash sintering technology

The present disclosure discloses a method for preparing a continuous fiber-reinforced ceramic matrix composite by flash sintering technology, including: placing a continuous ceramic fiber preform in a mold, adding a nano-ceramic powder, and subjecting the resultant to mechanical oscillation and press forming in sequence to obtain a green body; heating the green body to a preset temperature and applying an electric field with a preset electric field intensity, until occurrence of flash sintering; and converting a power supply from a constant voltage state to a constant current state, holding at the temperature and cooling to obtain the continuous fiber-reinforced ceramic matrix composite.

Disk and process for producing base material for disk, and disk roll

The present invention relates to a process for producing a base material for disks of disk rolls, in which the disk roll contains a rotating shaft and a plurality of the disks fitted on the rotating shaft by insertion whereby the outer peripheral surface of the disks serves as a conveying surface, in which the process contains molding a slurry raw material containing inorganic fibers, an inorganic filler having an aspect ratio of from 1 to 25 and an inorganic binder into a plate shape; and drying the molded plate.

Hybrid nanocomposite coatings and applications thereof

In one aspect, articles are described herein comprising refractory coatings employing alumina-based hybrid nanocomposite architectures. A coated article described herein comprises a substrate and a coating deposited by CVD adhered to the substrate, the coating including a composite refractory layer having a matrix phase comprising alumina and at least one particulate phase within the matrix phase, the particulate phase comprising nanoscale to submicron particles formed of at least one of an oxycarbide and oxycarbonitride of one or more metals selected from the group consisting of aluminum and Group IVB metals.

METHOD OF FORMING A HIGH THERMAL CONDUCTIVITY COMPOSITE DIELECTRIC MATERIAL

Disclosed herein are embodiments of materials having high thermal conductivity along with a high dielectric constants. In some embodiments, a two phase composite ceramic material can be formed having a contiguous aluminum oxide phase with a secondary phase embedded within the continuous phase. Example secondary phases include calcium titanate, strontium titanate, or titanium dioxide. 1. A method of forming a composite ceramic material , the method comprising:{'sub': 3', '3, 'mixing together materials that will form out a primary phase of aluminum oxide, a first secondary phase of CaTiOlocated within the primary phase, and a second secondary phase of LaAlOlocated within the primary phase, the materials forming the primary phase being generally non-reactive with materials forming the first and second secondary phases; and'}{'sup': −1', '−1, 'sintering the materials to form a composite ceramic having the primary phase and the first and second secondary phases, the composite ceramic having a dielectric constant of greater than 20 and a thermal conductivity of greater than 20 W·m·K.'}2. The method of wherein the composite ceramic has a thermal conductivity of greater than 30 W·m·K.3. The method of wherein the primary phase is generally contiguous.4. The method of wherein the composite ceramic has a dielectric constant of greater than 25.5. The method of wherein the composite ceramic has a dielectric constant of greater than 35.6. The method of wherein the composite ceramic has a temperature drift of resonant frequency lower than 1000 ppm/Degree C.7. The method of further comprising machining the composite ceramic.8. The method of further comprising forming a radiofrequency component from the composite ceramic.9. A method of forming a composite ceramic material claim 7 , the method comprising:{'sub': 3', '2', '6, 'mixing together materials that will form out a primary phase of aluminum oxide, a first secondary phase of CaTiOlocated within the primary phase, and a second ...

Composite ceramic layered body and manufacturing method

Provided is a composite ceramic layered body, including: a substrate; and a composite ceramic that coats the substrate, the composite ceramic including a nitride phase and an oxide phase having an elastic modulus that differs from an elastic modulus of the nitride phase by 10% or more. The composite ceramic includes, among the nitride phase and the oxide phase, a first phase that occupies a largest area ratio, and a toughening phase that occupies an area ratio of 1% or more and has a largest difference in elastic modulus from an elastic modulus of the first phase. In a case in which the first phase is the nitride phase, the toughening phase is the oxide phase, and in a case in which the first phase is the oxide phase, the toughening phase is the nitride phase.

AGGLOMERATE ABRASIVE GRAIN

The present invention relates to an agglomerate abrasive grain made up of a plurality of individual abrasive grains which are bonded into an inorganic or organic binder matrix, wherein, based on the total weight of the agglomerate abrasive grain, at least 8% by weight of the abrasive grains which are bonded into the matrix are fused alumina-based polycrystalline alumina abrasive grains with a percentage of more than 97% by weight of alpha-alumina, and wherein the polycrystalline alumina abrasive grains, in turn, are made up of a plurality of AlOprimary crystals with a crystal size of between 20 μm and 100 μm. The agglomerate abrasive grain has a closed macroporosity with a pore volume of between 5% by volume and 30% by volume, wherein the average pore diameter of the closed macropores is between 10 μm and 100 μm and their maximum pore diameter is in the range of approx. 120 μm. 1. An agglomerate abrasive grain made up of a plurality of individual abrasive grains which are bonded into an inorganic or organic binder matrix ,wherein{'sub': 2', '3, 'based on the total weight of the agglomerate abrasive grain, at least 8% by weight of the abrasive grains which are bonded into the binder matrix are fused alumina-based polycrystalline alumina abrasive grains with a percentage of more than 97% by weight of alpha-alumina, wherein the polycrystalline alumina abrasive grains, in turn, are made up of a plurality of AlOprimary crystals with a crystal size of between 20 μm and 100 μm.'}2. The agglomerate abrasive grain according to claim 1 ,whereinin addition to the polycrystalline alumina abrasive grains, individual compact monolithic abrasive grains are additionally bonded into the binder matrix.3. The agglomerate abrasive grain according to claim 2 ,whereinthe average grain size of the individual compact monolithic abrasive grains lies between the maximum grain size of the polycrystalline alumina abrasive grains and the minimum crystal size of the primary crystals which are ...

Alumina sintered body production method and alumina sintered body

A method for producing an alumina sintered body, comprising: molding an alumina powder to obtain an alumina article, the alumina powder comprising alumina particles having a particle diameter of not less than 0.1 μm and less than 1 μm, and alumina particles having a particle diameter of not less than 1 μm and less than 100 μm; forming a carbon powder-containing layer on a surface of the alumina article to obtain a laminate body; and irradiating a surface of the carbon powder-containing layer of the laminate body with a laser light to form a transparent alumina sintered portion.

REFRACTORY OBJECT AND PROCESS OF FORMING A GLASS SHEET USING THE REFRACTORY OBJECT

A refractory object can include at least approximately 10 wt % AlOand at least approximately 1 wt % SiO. In an embodiment, the refractory object can include an additive. In a particular embodiment, the additive can include TiO, YO, SrO, BaO, CaO, TaO, FeO, ZnO, or MgO. The refractory object can include at least approximately 3 wt % of the additive. In an additional embodiment, the refractory object can include no greater than approximately 8 wt % of the additive. In a further embodiment, the creep rate of the refractory object can be at least approximately 1×10h. In another embodiment, the creep rate of the refractory object can be no greater than approximately 5×10h. In an illustrative embodiment, the refractory object can include a glass overflow trough or a forming block. 1. A refractory object comprising:{'sub': 2', '3', '2', '3', '2', '3, 'AlOat a content in a range of approximately 10 wt % AlOto approximately 94 wt % AlO;'}{'sub': 2', '2, 'SiOat a content of at least approximately 1.1 wt % SiO;'}{'sub': 2', '2', '3, 'an additive at a content of at least 0.2 wt % additive, wherein the additive includes TiO, YO, CaO, MgO, or any combination thereof; and'}{'sup': −4', '−1, 'wherein a creep rate of the refractory object is no greater than approximately 1×10h.'}2. The refractory object as recited in claim 1 , wherein the apparent porosity of the refractory object is no greater than approximately 0.8 vol %.3. The refractory object as recited in claim 1 , wherein the refractory object includes no greater than approximately 8 wt % of the additive.4. The refractory object as recited in claim 1 , wherein the refractory object includes no greater than approximately 1 wt % of an alkali metal oxide.5. The refractory object as recited in claim 1 , wherein the refractory object includes at least approximately 0.2 wt % YO.6. The refractory object as recited in claim 1 , wherein the refractory object comprises no greater than approximately 0.3 wt % ZrO.7. The refractory object ...

CERMET MATERIAL

A cermet material, including a plurality of ceramic particles defining a ceramic portion; and a plurality of high magnetic permeability metallic particles distributed throughout the ceramic portion to define an admixture. The ceramic particles and the metallic particles are generally the same size and shape. Each respective high magnetic permeability metallic particle has a magnetic permeability of at least 0.0001 H/m. The ceramic particles are selected from the group consisting of zirconia, yttria stabilized zirconia, zirconia toughened alumina, alumina, gadolinium oxide, TiB, ZrB, HfB, TaB, TiC, CrC, and combinations thereof. 1. A cermet precursor material , comprising:a plurality of ceramic particles defining a ceramic portion; anda plurality of high magnetic permeability metallic particles distributed throughout the ceramic portion to define an admixture;wherein the ceramic particles and the metallic particles are generally the same size and shape;wherein each respective high magnetic permeability metallic particle has a magnetic permeability of at least 0.0001 H/m; and{'sub': 2', '2', '2', '2', '3', '2, 'wherein the ceramic particles are selected from the group consisting of zirconia, yttria stabilized zirconia, zirconia toughened alumina, alumina, gadolinium oxide, TiB, ZrB, HfB, TaB, TiC, CrC, and combinations thereof.'}2. The cermet precursor of claim 1 , wherein the admixture is homogeneous.3. The cermet precursor of wherein the high magnetic permeability metallic particles are selected from the group consisting of mu-metal claim 1 , soft ferrite claim 1 , and combinations thereof.4. A metal detectible plastic material claim 1 , comprising:a plurality of plastic particles defining a plastic portion; anda plurality of high magnetic permeability metallic particles distributed throughout the plastic portion to define an admixture;wherein the plastic particles and the metallic particles are generally the same size and shape;wherein each respective high magnetic ...

Ceramic matrix composite reinforced material

A CMC article may include a CMC substrate defining a major surface and a plurality of CMC reinforcing pins at least partially embedded in the CMC substrate. Each CMC reinforcing pin of the plurality of CMC reinforcing pins defines a respective long axis. The respective long axes may be oriented at an angle substantially perpendicular to the major surface of the CMC substrate. A method may include inserting a plurality of CMC reinforcing pins into a major surface of a ceramic fiber preform. Each CMC reinforcing pin of the plurality of CMC reinforcing pins defines a respective long axis. As the plurality of CMC reinforcing pins are inserted into the major surface, the respective long axes may be oriented at an angle substantially perpendicular to the major surface. The method also includes forming a matrix of material within pores of the ceramic fiber preform to form a CMC article.

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 LiLaM′M″ZrO , wherein 4 Подробнее

SINTERED CERAMIC BODIES AND APPLICATIONS THEREOF

In one aspect, sintered ceramic bodies are described herein which, in some embodiments, demonstrate improved resistance to wear and enhanced cutting lifetimes. For example, a sintered ceramic body comprises tungsten carbide (WC) in an amount of 40-95 weight percent, alumina in an amount of 5-30 weight percent and ditungsten carbide (WC) in an amount of at least 1 weight percent. 1. A sintered ceramic body comprising:tungsten carbide (WC) an amount of 40-95 weight percent and AlON.2. The sintered ceramic body of claim 1 , wherein the AlON is present in an amount of 0.1 to 40 weight percent.3. The sintered ceramic body of further comprising ditungsten carbide (WC).4. The sintered ceramic body of claim 3 , wherein the WC is present in an amount of 0.1-25 weight percent.5. The sintered ceramic body of further comprising zirconia in an amount of 0.1-10 weight percent.6. The sintered ceramic body of further comprising alumina claim 1 , aluminum nitride or combinations thereof.7. The sintered ceramic body of further comprising an additive component comprising one or more Group VB metal carbides claim 1 , chromium carbide claim 1 , ZrNbC or mixtures thereof.8. The sintered ceramic body of further comprising one or more titanium (Ti) compounds claim 1 , molybdenum (Mo) compounds claim 1 , or (Ti claim 1 ,Mo)-compounds.9. The sintered ceramic body of claim 8 , wherein the one or more Ti-compounds claim 8 , Mo-compounds claim 8 , or mixtures thereof are present in a total amount of 0.1-20 weight percent.10. The sintered ceramic body of claim 8 , wherein Mo is present in the sintered ceramic body in an amount of 0.05 to 1 weight percent. Pursuant to 35 U.S.C. § 120, the present application is a divisional application of U.S. patent application Ser. No. 15/641,846 filed Jul. 5, 2017 which is a divisional application of U.S. Pat. No. 9,845,268.The present invention relates to sintered ceramic bodies and, in particular, to sintered ceramic bodies having compositions and properties ...

Formulations with active functional additives for 3d printing of preceramic polymers, and methods of 3d-printing the formulations

This invention provides resin formulations which may be used for 3D printing and pyrolyzing to produce a ceramic matrix composite. The resin formulations contain a solid-phase filler, to provide high thermal stability and mechanical strength (e.g., fracture toughness) in the final ceramic material. The invention provides direct, free-form 3D printing of a preceramic polymer loaded with a solid-phase filler, followed by converting the preceramic polymer to a 3D-printed ceramic matrix composite with potentially complex 3D shapes or in the form of large parts. Other variations provide active solid-phase functional additives as solid-phase fillers, to perform or enhance at least one chemical, physical, mechanical, or electrical function within the ceramic structure as it is being formed as well as in the final structure. Solid-phase functional additives actively improve the final ceramic structure through one or more changes actively induced by the additives during pyrolysis or other thermal treatment.

Whisker reinforced high fracture toughness ceramic threaded fasteners

A high temperature fastener including a bolt and a nut, where the bolt and the nut are constructed of an aluminum oxide ceramic material reinforced with silicon-carbide crystal whiskers or silicon nitride.

POROUS MATERIAL AND PREPARATION METHOD THEREOF

A porous material having a hierarchical pore structure, wherein a size and shape of interconnection parts of at least one level pore cavities is consistent with a size and shape of interconnection parts between the level pore cavities and the previous level pore cavities thereof, and an average value of equivalent diameters of the interconnection parts is larger than 45% of that of a diameter of small pore cavities of two adjacent pore cavities of the interconnection parts. The method for preparing the porous material includes: mixing a raw material powder with a pore-forming agent used for preparing the smallest level pores to formulate a slurry; uniformly filling the slurry into a polymeric material frame, and drying and crushing to form mixed grains; then uniformly mixing the mixed grains with the pore-forming agent used for preparing the upper-level pore cavities, forming a compact green body and sintering. 1. A porous material , comprising a material body , wherein the material body comprises pore cavities graded by pore size of the material and cavity walls surrounding the pore cavities , and lower-level pore cavities are arranged on cavity walls of upper-level pore cavities formed by surrounding a three-dimensional space; wherein pore cavities of same level are interconnected with each other , and pore cavities of different levels are also interconnected with each other , and a size and shape of interconnection parts of at least one level pore cavities is consistent with a size and shape of interconnection parts between the one level pore cavities and previous level pore cavities thereof , and an average value of an equivalent diameter of the interconnection parts is larger than 45% of that of a diameter of small pore cavities of two adjacent pore cavities of the interconnection parts.2. The porous material according to claim 1 , wherein porous material of each level in the material body is a continuous structure.3. The porous material according to claim 2 , ...

Microstructured fiber interface coatings for composites

Disclosed is a coated ceramic fiber including a silicon carbide coating layer adjacent to the ceramic fiber and a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

PERMANENT FILTER FOR A STERILIZATION CONTAINER, STERILIZATION CONTAINER AND METHOD FOR PRODUCING A PERMANENT FILTER

A permanent filter for a medical sterilization container is provided. The permanent filter is made from a ceramic. The ceramic is made from globular substrate grains. A medical sterilization container is also provided, in particular for receiving and storing objects to be sterilized, having a container bottom part and a container top part for closing the container bottom part in a closed position of the sterilization container. At least one of the container bottom part and the container top part have a gas exchange orifice, which is closed with a permanent filter. The permanent filter is made from a ceramic and the ceramic is made from globular substrate grains. In addition, a method is provided for producing a permanent filter for a medical sterilization container. The permanent filter is produced from a ceramic material by sintering. Globular substrate grains are used as the ceramic material. 1. A permanent filter for a medical sterilization container , wherein the permanent filter is made from a ceramic and wherein the ceramic is made from globular substrate grains.2. The permanent filter according to claim 1 , wherein the permanent filter is self-supporting claim 1 , without a support element.3. The permanent filter according to claim 1 , wherein the substrate grains are produced bydispersing and deagglomerating ceramic powder in aqueous suspension to produce individual primary grains,spray drying the suspension containing the primary grains andcalcining the primary grains to yield secondary grains, which form the globular substrate grains.4. The permanent filter according to claim 3 , wherein the ceramic powder is aluminium oxide (AlO) claim 3 , zirconium oxide (ZrO) claim 3 , titanium dioxide (TiO) claim 3 , mullite claim 3 , silicate claim 3 , kaolin or any desired mixture thereof.5. The permanent filter according to claim 4 , wherein the ceramic powder is γ-aluminium oxide (γ-AlO).6. The permanent filter according to claim 3 , wherein the globular substrate ...

STRUCTURAL AND MECHANICAL PROPERTIES OF NANO AND MICRO AL2O3-CBN COMPOSITES PREPARED BY SPARK PLASMA SINTERING

Conventional sintering processes convert a portion of cBN to hBN which is softer than cBN which negatively affects functional properties of an alumina composite. The invention is directed to method for making an alumina-cubic boron nitride (AlO-cBN) composite that contains substantially no hexagonal boron nitride (hBN) by non-conventional spark plasma sintering of cBN with nano-sized alumina particles. The invention is also directed to AlO-cBN/Ni composites, which contain substantially no hBN, and which exhibit superior physical and mechanical properties compared to alumina composites containing higher amounts of hBN. 1. A method for making an alumina-cubic boron nitride (“AlO-cBN”) composite comprising spark plasma sintering cBN particles with nano-sized alumina particles; wherein an average particle size of the nano-sized alumina particles is no more than 50 nm.2. The method of claim 1 , wherein the cBN particles are substantially cBN without a nickel coating.3. The method of claim 1 , wherein the cBN particles are coated with nickel.4. The method of claim 1 , wherein the cBN particles are coated with nickel and comprise 20-80 wt % nickel claim 1 , based on a total weight of the nickel-coated cBN particles.5. The method of claim 1 , wherein the cBN particles are coated with nickel and comprise 50-70 wt % nickel claim 1 , based on a total weight of the nickel-coated cBN particles.6. The method of claim 1 , wherein an average particle size of the nano-sized alumina particles is no more than 2 nm.7. The method of claim 1 , wherein an average particle size of the nano-sized alumina particles is no more than 10 nm.8. The method of claim 1 , wherein an average particle size of the nano-sized alumina particles is no more than 5 nm.9. The method of claim 1 , wherein an average particle size of the nano-sized alumina particles is no more than 2 nm.10. The method of claim 1 , wherein an average particle size of the cBN particles ranges from 1 to 100 μm.11. The method of ...

CERAMIC SLURRIES FOR ADDITIVE MANUFACTURING TECHNIQUES

A ceramic slurry for forming a ceramic article includes a binder, a first plurality of ceramic particles having a first morphology, a second plurality of ceramic particles having a second morphology that is different from the first morphology; and a photoinitiator. A method for using this slurry for fabricating ceramic articles is presented as well. 1. A ceramic slurry for forming a ceramic article , comprising:a binder;a first plurality of ceramic particles having a first morphology;a second plurality of ceramic particles having a second morphology that is different from the first morphology; anda photoinitiator.2. The ceramic slurry of claim 1 , wherein the first plurality of particles has a median sphericity that is greater than a median sphericity of the particles of the second plurality.3. The ceramic slurry of claim 2 , wherein the median sphericity of the particles of the first plurality is at least 0.9.4. The ceramic slurry of claim 1 , wherein total particle loading of the slurry is in a range from about 45 percent to about 75 percent by volume of slurry.5. The ceramic slurry of claim 1 , wherein the first plurality is present in the slurry as from about 20 percent to about 99 percent by volume of total ceramic material present in the slurry.6. The ceramic slurry of claim 1 , wherein the second plurality is present in the slurry as from about 1 percent to about 80 percent by volume of total ceramic material present in the slurry.7. The ceramic slurry of claim 1 , wherein a first median particle size (d) of the first plurality of ceramic particles is different from a second median particle size (d) of the second plurality of ceramic particles claim 1 , and wherein the first and second dare between approximately 2 microns (μm) and 25 μm.8. The ceramic slurry of claim 7 , wherein the first median particle size of the first plurality of ceramic particles is in a range from about 8 microns to about 15 microns.9. The ceramic slurry of claim 7 , wherein the second ...

Ceramic structured body and sensor element of gas sensor

A sensor element of a gas sensor includes: an element base which is a ceramic structured body including a detection part of detecting a target measurement gas component; an outer protective layer which is a porous layer provided in at least a part of an outermost peripheral portion of the element base; and an inner protective layer which is a porous layer having a degree of porosity of 30% to 85%, which is larger than a degree of porosity of the outer protective layer, inside the outer protective layer, wherein an average fine pore diameter of the inner protective layer is equal to or larger than 0.5 μm and equal to or smaller than 5.0 μm.

Cutting insert

A cutting insert has only cutting edge portion thereof made of SiC whisker reinforced ceramics brazed to the shank with active solder. This provides improved cutting performance by increased toughness and high strength of the SiC whisker reinforced ceramics without limitation in shape while reducing manufacturing costs. The cutting insert includes a cutting edge portion made of SiC whisker reinforced ceramics, and a shank to which the cutting edge portion is mounted. The cutting edge portion is brazed to the shank using an active solder, and the whiskers are disorderedly arranged and agglomerated in the cutting edge portion.

BORON ALUMINUM SILICATE MINERAL MATERIAL, LOW TEMPERATURE CO-FIRED CERAMIC COMPOSITE MATERIAL, LOW TEMPERATURE CO-FIRED CERAMIC, COMPOSITE SUBSTRATE AND PREPARATION METHODS THEREOF

The present invention relates to a boroaluminosilicate mineral material, a low temperature co-fired ceramic composite material, a low temperature co-fired ceramic, a composite substrate and preparation methods thereof. A boroaluminosilicate mineral material for a low temperature co-fired ceramic, the boroaluminosilicate mineral material comprises the following components expressed in mass percentages of the following oxides: 0.41%-1.15% of Na2O, 14.15%-23.67% of K2O, 1.17%-4.10% of CaO, 0-2.56% of Al2O3, 13.19%-20.00% of BO, and 53.47%-67.17% of SiO. The aforementioned boroaluminosilicate mineral material is chemically stable; a low temperature co-fired ceramic prepared from it not only has excellent dielectric properties, but also has a low sintering temperature, a low thermal expansion coefficient, and high insulation resistance; it is also well-matched with the LTCC process and can be widely used in the field of LTCC package substrates. 3. A low temperature co-fired ceramic composite material claim 1 , wherein the low temperature co-fired ceramic composite material comprises claim 1 , in mass percentage claim 1 , 35% to 65% of AlOand 35% to 65% of the boroaluminosilicate mineral material according to .4. The low temperature co-fired ceramic composite material according to claim 1 , wherein the low temperature co-fired ceramic composite material comprises 41.69% to 62.53% of AlOand 37.47% to 58.31% of the boroaluminosilicate mineral material according to .5. A method for preparing a boroaluminosilicate mineral material claim 1 , wherein it comprises the following steps:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'weighing a sodium source, a potassium source, a calcium source, an aluminum source, a boron source, and a silicon source according to a ratio of elements of the boroaluminosilicate mineral material according to ; mixing and grinding to obtain a boroaluminosilicate mineral grinding slurry;'}subjecting the boroaluminosilicate mineral grinding slurry ...

PREPARATION METHOD FOR CERAMIC COMPOSITE MATERIAL, CERAMIC COMPOSITE MATERIAL, AND WAVELENGTH CONVERTER

A preparation method for a ceramic composite material, a ceramic composite material, and a wavelength converter. The preparation method comprises: preparing an aluminium salt solution and a fluorescent powder; dispersing the fluorescent powder into a buffer solution having a pH 4.5-5.5 to obtain a suspension; titrating the suspension with the aluminium salt solution to obtain a fluorescent powder coated with AlOhydrate film; calcining the fluorescent powder coated with AlOhydrate film to obtain a AlO-coated fluorescent powder; mixing aluminium oxide powder with a particle size of 0.1 μm-1 μm and aluminium oxide powder with a particle size of 1 μm-10 μm to obtain mixed aluminium oxide powder; mixing the AlO-coated fluorescent powder and the mixed aluminium oxide powder to obtain mixed powder, the AlO-coated fluorescent powder being present in 40%-90% by weight of the mixed powder; and pre-pressing and sintering the mixed powder to obtain the ceramic composite material. 1. A method for preparing a ceramic composite material , comprising:{'sub': 2', '3, 'preparing an aluminum salt solution and a fluorescent powder according to a mass ratio of AlOto fluorescent powder of (0.1 to 1):100;'}dispersing the fluorescent powder in a buffer solution with a pH value of 4.5 to 5.5 to obtain a suspension;{'sub': 2', '3, 'titrating the suspension with the aluminum salt solution to obtain a fluorescent powder coated with an AlOhydrate film;'}{'sub': 2', '3', '2', '3, 'calcining the fluorescent powder coated with the AlOhydrate film to obtain an AlO-coated fluorescent powder;'}mixing an alumina powder having a particle diameter of 0.1 μm to 1 μm and an alumina powder having a particle diameter of 1 μm to 10 μm according to a molar ratio of 100:(0.1 to 5), so as to obtain a mixed alumina powder;{'sub': 2', '3', '2', '3, 'mixing the AlO-coated fluorescent powder and the mixed alumina powder to obtain a mixed powder, wherein the AlO-coated fluorescent powder accounts for 40% to 90% by ...

Method for producing ceramic composite

A method for producing a ceramic composite includes: preparing a sintered body in a plate form containing a fluorescent material having a composition of a rare earth aluminate, and aluminum oxide; and eluting the aluminum oxide from the sintered body by contacting the sintered body with a basic substance, for example, contained in an alkali aqueous solution, and the dissolution amount of the fluorescent material eluted from the sintered body in the step of eluting the aluminum oxide is 0.5% by mass or less based on an amount of the fluorescent material contained in the sintered body as 100% by mass.

REFRACTORY OBJECT AND PROCESS OF FORMING A GLASS SHEET USING THE REFRACTORY OBJECT

A refractory object can include at least approximately 10 wt % AlOand at least approximately 1 wt % SiO. In an embodiment, the refractory object can include an additive. In a particular embodiment, the additive can include TiO, YO, SrO, BaO, CaO, TaO, FeO, ZnO, or MgO. The refractory object can include at least approximately 3 wt % of the additive. In an additional embodiment, the refractory object can include no greater than approximately 8 wt % of the additive. In a further embodiment, the creep rate of the refractory object can be at least approximately 1×10h. In another embodiment, the creep rate of the refractory object can be no greater than approximately 5×10h. In an illustrative embodiment, the refractory object can include a glass overflow trough or a forming block. 1. A refractory object comprising:{'sub': 2', '3', '2', '3', '2', '3, 'AlOat a content in a range of 10 wt % AlOto 94 wt % AlO;'}{'sub': 2', '2, 'SiOat a content of at least 1.1 wt % SiO;'}an additive at a content of at least 0.2 wt % additive, wherein the additive includes CaO, MgO, or any combination thereof.2. The refractory object as recited in claim 1 , wherein the apparent porosity of the refractory object is no greater than 0.8 vol %.3. The refractory object as recited in claim 1 , wherein the refractory object includes no greater than 8 wt % of the additive.4. The refractory object as recited in claim 1 , wherein the refractory object includes no greater than 1 wt % of an alkali metal oxide.5. The refractory object as recited in claim 1 , wherein the refractory object includes at least 0.2 wt % YO.6. The refractory object as recited in claim 1 , wherein the refractory object comprises no greater than 0.3 wt % ZrO.7. The refractory object as recited in claim 1 , wherein the refractory object includes at least 0.2 wt % TiO.8. The refractory object as recited in claim 7 , wherein the refractory object includes no greater than 4.0 wt % TiO.9. The refractory object as recited in claim 1 , ...

Method for producing a part from composite material by injecting a filled slip into a fibrous texture

A manufacturing method for a composite material part includes injecting under pressure a slip containing a refractory ceramic particle powder into the moulding cavity of an injection tooling, draining the liquid from the slip that passed through the moulding cavity and retaining the particle powder inside the moulding cavity to obtain a blank including refractory particles, demoulding the blank, and heat treating the blank to form a part. The injection tooling includes a porous material mould consisting of a moulding cavity, an enclosure of rigid material in which the porous material mould is held, the enclosure further including an injection port, a discharge vent and an injection canal connecting the injection port to the moulding cavity of the porous mould for the injection of the slip into the moulding cavity. The injection tooling includes a sacrificial capsule of porous material placed in moulding cavity.

Powder for additive modeling, structure, semiconductor production device component, and semiconductor production device

A material powder for additive modeling including a nitride, and a eutectic oxide, the nitride having an average density lower than an average density of the eutectic oxide, is used to produce a structure using an additive modeling method.

FIXED ABRASIVE ARTICLE

In one embodiment, an abrasive body can comprise a first surface having a first developed interfacial area ratio (Sdr1) and a second surface having a second developed interfacial area ratio (Sdr2), and wherein the Sdr1 is at least 35% different than the Sdr2. 1. A fixed abrasive article , comprisinga body comprising abrasive particles contained in a bond material,wherein the body comprises a first surface having a first developed interfacial area ratio (Sdr1) and a second surface having a second developed interfacial area ratio (Sdr2),wherein the difference between Sdr1 and Sdr2 is at least 35%.2. The fixed abrasive article of wherein Sdr1 is at least 60%.3. The fixed abrasive article of claim 1 , wherein Sdr2 is not greater than 110%.4. The fixed abrasive article of claim 1 , wherein the body comprises at least one first surface having a developed interfacial surface area of not greater than 70% (Sdr2) and at least one second surface having a developed interfacial surface area of at least 80% (Sdr1).5. The fixed abrasive article of claim 1 , wherein the difference between Sdr1 and Sdr2 is at least is at least 50%.6. The fixed abrasive article of claim 1 , wherein a ratio of Sdr1 to Sdr2 is at least 1:1.2.7. The fixed abrasive article of claim 1 , wherein the first surface and the second surface are orientated to each other by an angle of at least at least 5°.8. The fixed abrasive article of claim 1 , wherein at least 5% of the exterior surface area of the body can be a relatively high Sdr surface.9. The fixed abrasive article of claim 1 , wherein not greater than 95% of the exterior surface area of the body can be a relatively high Sdr surface.10. A method of making an abrasive body comprising:providing a mixture of particles comprising abrasive particles and a precursor bond material;forming a precursor body via additive manufacturing using the mixture; andtreating the precursor body to form the abrasive body,wherein the abrasive body comprises a first surface ...

Helium gas separator material and method for producing the same

The helium gas separator material includes a base portion and a gas separation portion joined to the base portion. The base portion is composed of a porous α-alumina material which has communication holes with an average diameter of 50 nm to 1,000 nm; the gas separation portion has a porous γ-alumina portion containing a Ni element and a silica membrane portion which is disposed on the inner wall of the communication holes in the porous portion; and the average diameter of pores surrounded and formed by the silica membrane portion is 0.27 nm to 0.60 nm.

THERMALLY INSULATING MATERIAL

Provided are thermally insulating materials comprising 1 to 95 wt % ceramic oxide, 1 to 30 wt % inorganic binding agent, and treated at a temperature of less than about 1000° C.; processes for producing the insulating materials; and uses thereof. 1. A thermally insulating material comprising:(a) 1 to 80 wt % ceramic oxide;(b) 5 to 30 wt % inorganic binding agent; and(c) treated at a temperature of less than 1000° C.;wherein the insulating material does not comprise vermiculite.2. The insulating material according to claim 1 , comprising 5 to 80 wt % ceramic oxide and 10 to 80 wt % ceramic oxide.3. (canceled)4. The insulating material according to claim 1 , wherein the ceramic oxide has a mean particle size of less than 350 μm or a mean particle size from 30 to 300 μm.5. (canceled)6. The insulating material according to claim 1 , wherein the ceramic oxide is selected from the group consisting of sodium oxide claim 1 , magnesium oxide claim 1 , potassium oxide claim 1 , calcium oxide claim 1 , alumina claim 1 , silica claim 1 , sodium silicate claim 1 , magnesium silicate claim 1 , potassium silicate claim 1 , calcium silicate claim 1 , aluminium silicate claim 1 , zirconium silicate claim 1 , sodium aluminate claim 1 , magnesium aluminate claim 1 , calcium aluminate claim 1 , zirconium aluminate claim 1 , nickel aluminate claim 1 , sodium phosphate claim 1 , magnesium phosphate claim 1 , calcium phosphate claim 1 , aluminium phosphate claim 1 , ferrous oxide claim 1 , ferric oxide claim 1 , zirconium oxide claim 1 , magnesium zirconate claim 1 , calcium zirconate claim 1 , and combinations thereof.7. The insulating material according to claim 1 , comprising 5 to 30 wt % inorganic binding agent.8. (canceled)9. The insulating material according to claim 1 , wherein the inorganic binding agent has a mean particle size of less than 350 μm or a mean particle size from 30 to 300 μm.10. (canceled)11. The insulating material according to claim 1 , wherein the inorganic ...

Monomer formulations and methods for 3d printing of preceramic polymers

This invention provides resin formulations which may be used for 3D printing and pyrolyzing to produce a ceramic matrix composite. The resin formulations contain a solid-phase filler, to provide high thermal stability and mechanical strength (e.g., fracture toughness) in the final ceramic material. The invention provides direct, free-form 3D printing of a preceramic polymer loaded with a solid-phase filler, followed by converting the preceramic polymer to a 3D-printed ceramic matrix composite with potentially complex 3D shapes or in the form of large parts. Other variations provide active solid-phase functional additives as solid-phase fillers, to perform or enhance at least one chemical, physical, mechanical, or electrical function within the ceramic structure as it is being formed as well as in the final structure. Solid-phase functional additives actively improve the final ceramic structure through one or more changes actively induced by the additives during pyrolysis or other thermal treatment.

POROUS CERAMIC MATERIAL OBTAINED BY WEAVING AND ACOUSTIC PANEL INCLUDING SUCH A MATERIAL

The present disclosure concerns a porous body made of a ceramic-matrix composite material for an acoustic attenuation panel and a method of manufacturing the porous body. The porous body includes a plurality of interwoven ceramic fibers, a metal oxide matrix, and a plurality of channels interwoven with the ceramic fibers and interconnected together. The channels define at least one cavity. In one form, at least one channel is wrapped around a ceramic fiber. In another form, at least one ceramic fiber and at least one channel are twisted together. In yet another form, at least one channel is wrapped around a ceramic fiber and twisted with the ceramic fiber. The present disclosure also concerns an acoustic attenuation panel including the porous body and an aircraft propulsion unit having such a panel. 1. A porous body made of a ceramic-matrix composite material for an acoustic attenuation panel , the porous body comprising:a plurality of interwoven ceramic fibers;a metal oxide matrix; anda plurality of channels interwoven with said ceramic fibers, said plurality of channels being interconnected together and defining at least one cavity,wherein at least one channel is wrapped around a ceramic fiber and/or twisted together with at least one ceramic fiber.2. The porous body according to claim 1 , wherein the channels are orientated in at least one of a weft direction and a warp direction of the ceramic fibers.3. The porous body according to claim 1 , wherein at least one ceramic fiber has a titer between 50 grams/1000 meters and 2500 grams/1000 meters for densities between 2.2 and 4.4. The porous body according to claim 1 , wherein at least one channel has an ovoid section having a minor axis between 0.05 mm and 5 mm and a major axis between 0.05 mm and 10 mm.5. The porous body according to claim 1 , wherein a volume ratio of the plurality of channels of the porous body is between 2% and 95% of said body.6. The porous body according to claim 5 , wherein the volume ratio ...

ABRASIVE PARTICLES

The formed ceramic abrasive particle includes a plurality of ceramic oxides. The particle further includes a first plurality of oxides, a second plurality of oxides, or a mixture thereof. The first plurality of oxides includes an oxide of yttrium, praseodymium, samarium, ytterbium, neodymium, lanthanum, gadolinium, dysprosium, erbium, or a combination thereof. The second plurality of oxides includes an oxide of iron, magnesium, zinc, silicon, cobalt, nickel, zirconium, hafnium, chromium, cerium, titanium, or a combination thereof. The formed ceramic abrasive particle further includes a plurality of edges, each edge having a length independently ranging from about 0.1 μm to about 5000 μm. The formed ceramic abrasive particle further includes a tip defined by a junction of at least two of the edges, the tip can have a radius of curvature ranging from about 0.5 μm to about 80 μm. 1. A formed ceramic abrasive particle comprising:a plurality of ceramic oxides; the first plurality of oxides comprise an oxide of yttrium, praseodymium, samarium, ytterbium, neodymium, lanthanum, gadolinium, dysprosium, erbium, or a combination thereof, and', 'the second plurality of oxides comprise an oxide of iron, magnesium, zinc, silicon, cobalt, nickel, zirconium, hafnium, chromium, cerium, titanium, or a combination thereof;, 'a first plurality of oxides, a second plurality of oxides, or a mixture thereof, wherein'}a plurality of edges, each edge having a length independently ranging from about 0.1 μm to about 5000 μm; anda tip defined by a junction of at least two of the edges, the tip having a radius of curvature ranging from about 0.5 μm to about 80 μm.2. The formed ceramic abrasive particle of claim 1 , wherein the ceramic oxides independently comprise fused aluminium oxide material claim 1 , heat treated aluminium oxide material claim 1 , sintered aluminium oxide material claim 1 , silicon carbide material claim 1 , titanium diboride claim 1 , boron carbide claim 1 , tungsten ...

METHOD FOR MANUFACTURING WAVELENGTH CONVERSION MEMBER

A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. 1. A method for manufacturing a wavelength conversion member , the method comprising: an yttrium-aluminum-garnet phosphor having a composition represented by Formula (I) below; and', 'alumina particles with an alumina purity of 99.0% by mass or more;, 'providing by applying a cold isostatic pressing (CIP) treatment a green body comprisingprimary-sintering the green body at a temperature in a range of 1200° C. or more and 1800° C. or less to obtain a first sintered body; and {'br': None, 'sub': 1-a-b', 'a', 'b', '3', '5', '12, '(YGdCe)AlO\u2003\u2003(I)'}, 'secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body,'}wherein a and b satisfy 0≤a≤0.3 and 0 Подробнее

Corrosion-resistant member

A corrosion-resistant member may include alumina ceramics containing α-alumina and anorthite. The alumina ceramics may contain 0.4% by mass or more of Ca and Si in total in terms of CaO and SiO 2 , respectively, and a mass ratio of CaO/SiO 2 may fall within a range of 0.5 to 2. Moreover, a ratio B/A of X-ray diffraction peak intensity B for (004) plane of the anorthite to X-ray diffraction peak intensity A for (104) plane of the α-alumina in a surface of the alumina ceramics, may be 0.01 or more.

Nuclear reactor core architecture with enhanced heat transfer and safety

An enhanced architecture for a nuclear reactor core includes several technologies: (1) nuclear fuel tiles (S-Block); and (2) a high-temperature thermal insulator and tube liners with a low-temperature solid-phase moderator (U-Mod) to improve safety, reliability, heat transfer, efficiency, and compactness. In S-Block, nuclear fuel tiles include a fuel shape designed with an interlocking geometry pattern to optimize heat transfer between nuclear fuel tiles and into a fuel coolant and bring the fuel coolant in direct contact with the nuclear fuel tiles. Nuclear fuel tiles can be shaped with discontinuous nuclear fuel lateral facets and have fuel coolant passages formed therein to provide direct contact between the fuel coolant and the nuclear fuel tiles. In U-Mod, tube liners with low hydrogen diffusivity retain hydrogen in the low-temperature solid-phase moderator even at elevated temperatures and the high-temperature thermal insulator insulates the solid-phase moderator from the nuclear fuel tiles.

MEMBER FOR PLASMA PROCESSING DEVICES

A member for a plasma processing device of the present disclosure is a member for a plasma processing device made of ceramics and having a shape of a cylindrical body with a through hole in an axial direction. The ceramics is mainly composed of aluminum oxide, and has a plurality of crystal grains and a grain boundary phase that is present between the crystal grains. An inner peripheral surface of the cylindrical body has an arithmetic average roughness Ra of 1 μm or more and 3 μm or less, and an arithmetic height Rmax of 30 μm or more and 130 μm or less. 1. A member for a plasma processing device made of ceramics and having a shape of a cylindrical body with a through hole in an axial direction ,wherein the ceramics is mainly composed of aluminum oxide, and has a plurality of crystal grains and a grain boundary phase that is present between the crystal grains, andwherein the cylindrical body has an inner peripheral surface having an arithmetic average roughness Ra of 1 μm or more and 3 μm or less, and an arithmetic height Rmax of 30 μm or more and 130 μm or less.2. The member for a plasma processing device according to claim 1 , wherein the inner peripheral surface of the cylindrical body has an average value of kurtosis Rku of 6.0 or more.3. The member for a plasma processing device according to claim 1 , wherein the inner peripheral surface of the cylindrical body has a projected part composed of aluminum oxide crystal grains claim 1 , and a surface of the projected part is composed of a plurality of planes. The present disclosure relates to a member for a plasma processing device used in a plasma processing device.Conventionally, when manufacturing a semiconductor device, a plasma processing device is used to form a fine pattern by etching a thin film on a substrate. A member for a plasma processing device that supplies plasma generating gas to the plasma processing device is required to have high corrosion resistance with respect to the plasma generating gas in ...

Acoustic attenuation panel made of an oxide ceramic composite material with a core made of an electrochemically-converted metal material

The present disclosure relates to a method for producing an acoustic attenuation panel having two outer skins made from a composite material with a ceramic matrix containing a fibrous reinforcement. The skins are assembled on each side of a central honeycomb core having walls forming acoustic cavities produced by at least partial electrochemical conversion of aluminum into aluminum oxide. The method includes inserting a fugitive filler material into the acoustic cavities, leaving an annular space free in each cavity, on each side against the skin, extending around the cavity, and a step of sintering the composite material, in which the fugitive material is removed and the spaces around the cavities are filled with the composite material.

METHOD OF MANUFACTURING ELECTRICALLY CONDUCTIVE MAYENITE COMPOUND WITH HIGH ELECTRON DENSITY

A method of manufacturing an electrically conductive mayenite compound, includes (a) preparing a body to be processed, the body to be processed including a mayenite compound or a precursor of a mayenite compound; and (b) performing a heat treatment on the body to be processed under a reducing atmosphere including an aluminum compound and carbon monoxide (CO) gas within a range of 1080° C. to 1450° C., the aluminum compound being a compound that emits aluminum oxide gas during the heat treatment on the body to be processed. 1. A method of manufacturing an electrically conductive mayenite compound , comprising:(a) preparing a body to be processed, the body to be processed including a mayenite compound or a precursor of a mayenite compound; and(b) performing a heat treatment on the body to be processed under a reducing atmosphere including an aluminum compound and carbon monoxide (CO) gas within a range of 1080° C. to 1450° C., the aluminum compound being a compound that emits aluminum oxide gas during the heat treatment on the body to be processed.2. The method of manufacturing an electrically conductive mayenite compound according to claim 1 ,{'sub': 4', '3, 'wherein the aluminum compound is aluminum carbide (AlC).'}3. The method of manufacturing an electrically conductive mayenite compound according to claim 1 ,wherein the body to be processed is selected from a group consisting of a compact body including a mayenite compound powder, a sintered body including a mayenite compound and a compact body including a calcinated powder including calcium and aluminum.4. The method of manufacturing an electrically conductive mayenite compound according to claim 1 ,wherein step (b) is performed within a range of 30 minutes to 50 hours.5. The method of manufacturing an electrically conductive mayenite compound according to claim 1 ,wherein step (b) is performed under a vacuum environment whose pressure is less than or equal to 100 Pa.6. The method of manufacturing an ...

METHOD OF MANUFACTURING ELECTRICALLY CONDUCTIVE MAYENITE COMPOUND WITH HIGH ELECTRON DENSITY

A method of manufacturing an electrically conductive mayenite compound, includes preparing a body to be processed including a mayenite compound; and placing the body to be processed in the presence of carbon monoxide gas and aluminum vapor supplied from an aluminum source without being in contact with the aluminum source and retaining the body to be processed at a temperature range of 1080° C. to 1450° C. under a reducing atmosphere. 1. A method of manufacturing an electrically conductive mayenite compound , comprising:(1) preparing a body to be processed including a mayenite compound; and(2) placing the body to be processed in the presence of carbon monoxide gas and aluminum vapor supplied from an aluminum source without being in contact with the aluminum source and retaining the body to be processed at a temperature range of 1080° C. to 1450° C. under a reducing atmosphere.2. The method of manufacturing an electrically conductive mayenite compound according to claim 1 ,wherein the body to be processed includes a fluorine (F) component.3. The method of manufacturing an electrically conductive mayenite compound according to claim 2 ,wherein step (2) is performed under a status that the body to be processed and the aluminum source are input in a container including carbon.4. The method of manufacturing an electrically conductive mayenite compound according to claim 2 ,wherein the body to be processed including the mayenite compound is a compact body including a mayenite compound powder including a fluorine (F) component, or a sintered body including a mayenite compound including a fluorine (F) component.5. The method of manufacturing an electrically conductive mayenite compound according to claim 2 ,wherein a mayenite compound in which fluorine ions are introduced is manufactured after step (2).6. The method of manufacturing an electrically conductive mayenite compound according to claim 2 ,wherein step (2) is performed at a vacuum atmosphere whose pressure is less ...

Sintered compact, circuit component, and method of producing sintered compact

A sintered compact includes an alumina phase as a primary phase, and further includes an amorphous phase containing Si and Mn and a cordierite phase. The sintered compact has a porosity of higher than or equal to 1.1% and less than or equal to 5.0%. Preferably, I1/(I1+I2) is greater than or equal to 0.20 and less than or equal to 0.45, where I1 is the strength of the main peak of cordierite obtained by an XRD method, and I2 is the strength of the main peak of alumina.

THIN FILM CERAMICS AND CERMETS PROCESSED USING NANOPOWDERS OF CONTROLLED COMPOSITIONS

A method of making a thin film is provided. The method includes ball milling a suspension including a nanopowder, an additive component, and a solvent to generate a suspension of milled nanopowder, disposing a layer of the suspension of milled nanopowder onto a substrate, drying the layer by removing at least a portion of the solvent to form a green film, compressing the green film to form a compressed green film, debindering the compressed green film to form a debindered film, and sintering the debindered film to generate the thin film. The additive component includes a component selected from the group consisting of a dispersant, a binder, a plasticizer, and combinations thereof. 1. A method of making a thin film , the method comprising:ball milling a suspension comprising a nanopowder, an additive component, and a solvent to generate a suspension of milled nanopowder, wherein the additive component is selected from the group consisting of a dispersant, a binder, a plasticizer, and combinations thereof;disposing a layer of the suspension of milled nanopowder onto a substrate;drying the layer by removing at least a portion of the solvent to form a green film;compressing the green film to form a compressed green film;debindering the compressed green film to form a debindered film; andsintering the debindered film to generate the thin film.2. The method according to claim 1 , wherein the nanopowder comprises nanopowder particles having an average diameter of less than or equal to about 500 nm.3. The method according to claim 1 , wherein the nanopowder is made by liquid-feed flame spray pyrolysis claim 1 , co-precipitation claim 1 , or sol-gel synthesis.4. The method according to claim 1 , wherein the nanopowder comprises nanopowder particles comprising a material selected from the group consisting of oxides claim 1 , carbonates claim 1 , carbides claim 1 , nitrides claim 1 , oxycarbides claim 1 , oxynitrides claim 1 , oxysulfides claim 1 , and combinations thereof.5. ...

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. 1123-. (canceled)124. A composition comprising a lithium stuffed garnet and AlO , wherein the lithium-stuffed garnet is characterized by the empirical formula LiLaM′M″ZrO , wherein 4 Подробнее

Nickel-coated hexagonal boron nitride nanosheet composite powder, preparation and high performance composite ceramic cutting tool material

The invention relates to nickel-coated hexagonal boron nitride nanosheet composite powder, its preparation and high-performance composite ceramic cutting tool material. The composite powder has a core-shell structure with BNNS as the core and Ni as the shell. The self-lubricating ceramic cutting tool material is prepared by wet ball milling mixing and vacuum hot-pressing sintering with a phase alumina as the matrix, tungsten-titanium carbide as the reinforcing phase, nickel-coated hexagonal boron nitride nanosheet composite powder as the solid lubricant and magnesium oxide and yttrium oxide as the sintering aids. The invention also provides preparation methods of the nickel-coated hexagonal boron nitride nanosheet composite powder and the self-lubricating ceramic cutting tool material. 1. A nickel-coated hexagonal boron nitride nanosheet composite powder (BNNS@Ni) , wherein the composite powder has a core-shell structure with BNNS as the core and Ni as the shell.2. The nickel-coated hexagonal boron nitride nanosheet composite powder (BNNS@Ni) as claimed in claim 1 , wherein the Ni particles in the nickel-coated hexagonal boron nitride nanosheet composite powder are uniform in size claim 1 , and uniformly coated on the surface of the BNNS.3. The nickel-coated hexagonal boron nitride nanosheet composite powder (BNNS@Ni) as claimed in claim 1 , wherein the average sheet diameter of BNNS in the nickel-coated hexagonal boron nitride nanosheet composite powder is 100-800 nm claim 1 , and the average sheet thickness is 1-7 nm.4. The preparation method of the nickel-coated hexagonal boron nitride nanosheet composite powder (BNNS@Ni) as claimed in claim 1 , comprises the following steps:(1) the BNNS powder is proportionally weighed, added into an appropriate amount of isopropanol, ultrasonically dispersed for 20-30 min, and then centrifugally separate to obtain the dispersed BNNS powder;(2) the dispersed BNNS powder obtained in step (1) is added into the sensitizing solution ...

METHOD OF MAKING WHISKER REINFORCED HIGH FRACTURE TOUGHNESS CERAMIC THREADED FASTENERS

A high temperature fastener including a bolt and a nut, where the bolt and the nut are constructed of an aluminum oxide ceramic material reinforced with silicon-carbide crystal whiskers or silicon nitride. 117-. (canceled)18. A method of making a fastener comprising:creating a mixture of ceramic material powder;simultaneously heating and pressurizing the mixture creating a solid blank; and,forming a screw threaded surface on the blank.19. The method of claim 18 , further comprising:creating the mixture of ceramic material powder from aluminum oxide ceramic material powder and silicon-carbide crystal whiskers disbursed in the aluminum oxide ceramic material powder.20. (canceled)21. The method of claim 19 , further comprising:forming the screw threaded surface on the blank by machining the blank to form a screw threaded exterior surface on the blank.23. The method of claim 22 , further comprising:removing at least a portion of the insert from inside the blank creating a tool interface interior surface inside a blank.24. The method of claim 22 , further comprising:removing at least a portion of the insert from inside the blank creating a cooling channel inside the blank.25. The method of claim 22 , further comprising:removing at least a portion of the insert from inside the blank creating a screw threaded interior surface inside the blank.26. The method of claim 19 , further comprising:creating a mixture of aluminum oxide ceramic material powder and silicon-carbide crystal whiskers with a percentage of silicon-carbide crystal whiskers in the mixture being in a range of 18% to 30% of the mixture.27. The method of claim 19 , further comprising:the fastener having a low cataycity and high emissivity.28. A method of making a fastener comprisingcreating a mixture of aluminum oxide ceramic material powder and silicon-carbide whiskers;hot pressing the mixture of aluminum oxide ceramic material powder and silicon-carbide whiskers at a high temperature and a high pressure ...

PLATE-LIKE ALUMINA PARTICLE AND A MANUFACTURING METHOD FOR THE SAME

An object of the present invention is to provide a high-aspect-ratio plate-like alumina particle having low aggregability and high dispersibility and a method for producing the particle. 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. 1. A plate-like alumina particle that is obtained by firing an aluminum compound in the presence of a molybdenum compound and a shape-controlling agent and that includes molybdenum in the particle.2. The plate-like alumina particle according to claim 1 , wherein the shape-controlling agent is a compound including silicon or a silicon atom.3. The plate-like alumina particle according to claim 1 , wherein the shape-controlling agent is a compound including sodium or a sodium atom.4. The plate-like alumina particle according to claim 1 , having a polygonal plate-like particle shape and an aspect ratio claim 1 , which is a ratio of particle size to thickness claim 1 , of 2 to 500.5. The plate-like alumina particle according to claim 1 , wherein a molybdenum content is 0.001% to 10% by mass on a molybdenum trioxide basis.6. A method for producing a plate-like alumina particle that is obtained by firing an aluminum compound in the presence of a molybdenum compound and a shape-controlling agent and that includes molybdenum in the particle.7. The method for producing a plate-like alumina particle according to claim 6 , further comprising:a step in which the aluminum compound and the molybdenum compound react with each other to form aluminum ...

METHOD OF MANUFACTURING REFRACTORY

In a firing condition determination step S, as firing conditions for firing a refractory, an FeOamount (mass %) which is an FeOcontent, a target firing temperature T (° C.) to which the temperature of the refractory is raised when the refractory is fired and a continuous firing time t (hr) during which the firing is continued at the target firing temperature T are determined. The FeOamount, the target firing temperature T and the continuous firing time t are determined so as to satisfy all five formulas of 1.20.992×FeOamount+0.080. 1. A method of manufacturing an AlO—SiO-based refractory in which an AlOcontent is equal to or more than 35% and equal to or less than 80% by mass % , the method comprising:{'sub': 2', '3', '2', '2', '3', '2', '3, 'a firing condition determination step of determining, as firing conditions for firing the AlO—SiO-based refractory, an FeOamount (mass %) which is an FeOcontent in the refractory, a target firing temperature T (° C.) serving as a target temperature to which a temperature of the refractory is raised when the refractory is fired and a continuous firing time t (hr) serving as a time during which the firing of the refractory is continued at the target firing temperature T after the temperature of the refractory is raised to the target firing temperature T;'}{'sub': 2', '3', '2', '3, 'a temperature rise firing step of using the refractory which contains the FeOamount of FeOdetermined in the firing condition determination step and firing the refractory while raising the temperature of the refractory to the target firing temperature T; and'}a continuous firing step of firing the refractory whose temperature is raised to the target firing temperature T at the target firing temperature T for the continuous firing time t,{'sub': 2', '3, 'claim-text': [{'br': None, 'sub': 2', '3, '1.2 Подробнее

Light wavelength conversion member and light emission device

An optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce, wherein A is at least one element selected from Sc, Y and lanthanoids (except for Ce), and B is at least one element selected from Al and Ga. Further, the following relations are satisfied: 0%≤X≤25%, 9%≤Y≤45%, and 48%≤Z≤90%, wherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N and a, b, c and N are as defined herein. Also disclosed is a light-emitting device including the optical wavelength conversion member.

CERAMIC FILTER FOR BEVERAGE AND MANUFACTURING METHOD OF THE SAME

A ceramic filter requires a permeation time ranging from 3 seconds to 15 seconds in a case where 150 ml of hot water having a temperature of 90° C. is introduced, has a total pore volume of 0.230 to 0.270 cm/g, and has a median pore diameter of 100 to 160 μm. A method for manufacturing the ceramic filter includes a kneading process of obtaining a kneaded material in which 55 to 65 mass % of alumina, 6 to 12 mass % of bentonite, 6 to 10 mass % of water-insoluble organic fine particles, and 15 to 30 mass % of water are mixed, a primary molding process of molding a primary molded article by manually pressing the kneaded material against a filter mold, a secondary molding process of molding a secondary molded article by performing press working on the primary molded article molded in the primary molding process, and a firing process of firing the secondary molded article molded in the secondary molding process. 1. A ceramic filter for a beverage , the ceramic filter requiring a permeation time ranging from 3 seconds to 15 seconds in a case where 150 ml of hot water having a temperature of 90° C. is introduced , having a total pore volume of 0.230 to 0.270 cm/g , and having a median pore diameter of 100 to 160 μm.2. The ceramic filter for a beverage according to claim 1 , wherein the ceramic filter is formed in a bowl shape.3. A method for manufacturing the ceramic filter for a beverage according to claim 1 , comprising:a kneading process of obtaining a kneaded material in which 55 to 65 mass % of alumina, 6 to 12 mass % of bentonite, 6 to 10 mass % of water-insoluble organic fine particles, and 15 to 30 mass % of water are mixed;a primary molding process of molding a primary molded article by manually pressing the kneaded material against a filter mold;a secondary molding process of molding a secondary molded article by performing press working on the primary molded article molded in the primary molding process; anda firing process of firing the secondary molded article ...

Light weight proppant with improved strength and methods of making same

Methods are described to make strong, tough, and/or lightweight glass-ceramic composites having a crystalline phase and an amorphous phase generated by viscous reaction sintering of a complex mixture of oxides and other materials. The present invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses.

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{'br': None, 'sub': A', 'B', 'D', 'E', 'F, 'i': 'c', 'LiLaM′M″ZrO,'}wherein 4 Подробнее

POROUS MATERIAL INCLUDING CARBON NANOHORNS AND USE THEREOF

The objective of the present teaching is to provide a porous material including carbon nanohorns. The porous material includes carbon nanohorns and has a predetermined three-dimensional shape. 1. A method for producing a sintered and porous body containing carbon nanohorns ,the method comprising:preparing a molding body containing a carbon nanohorn produced by arc discharge in a fluid; andheating the molding body under pressure to sinter and make porous the molding body.2. The method according to claim 1 , wherein the heating is performed by discharge plasma sintering.3. The method according to claim 1 , wherein the heating is performed at a temperature of 800° C. or more.4. The method according to claim 1 , wherein the heating is perfoimed by applying a load of 10 kN or less.5. The method according to claim 1 , wherein the heating is performed under vacuum condition.6. The method according to claim 1 , wherein the heating is performed at a temperature of 800° C. or more by applying a load of 10 kN or less.7. The method according to claim 1 , wherein the density of the sintered and porous body is 2.5 cm/g or less.8. The method according to claim 1 , wherein the pore volume of the carbon nanohorrn is 0.8 cm/g or more.9. The method according to claim 8 , wherein the heating is performed at a temperature of 800° C. or more by applying a load of 10 kN or less.10. The method according to claim 1 , wherein the carbon nanohorn relates to one or more elements selected from the group consisting of Na claim 1 , K claim 1 , Mg claim 1 , Ca claim 1 , Fe claim 1 , Si claim 1 , and Cl and contains the one or more elements in the following contents;Na: 0.003% or more to 0.3% or less;K: 0.001% or more to 0.1% or less;Mg: 0.0005% or more to 0.05% or less;Ca: 0.004% or more to 0.4% or less;Fe: 0.006% or more to 0.6% or less;Si: 0.002% or more to 0.2% or less; andO: 0.004% or more to 0.4% or less.11. The method according to claim 1 , wherein the carbon nanohorn is composed mainly of a ...

Dense sintered product

Sintered product having a chemical analysis such that, in mass percentages: SiO 2 content is greater than 0.2% and less than 2%, and CaO content is greater than 0.1% and less than 1.5%, and MgO content is less than 0.3%, and alumina and other elements being the complement at 100%, the content of other elements being less than 1.5%, having a relative density greater than 90%, comprising, for more than 90% of its volume, a stack of ceramic platelets ( 10 ) laid flat, all of said platelets having an average thickness less than 3 μm, more than 95% by number of said platelets each containing more than 95% by mass of alumina, having a width (l) greater than 81 mm.

Method for manufacturing an elastic ceramic matrix composite

Disclosed are: damage-resistant ECMCs that need to work and remain elastic between minus 120° C. and positive 300° C.; ECMCs that need to be able to contain a flame of 1900° C. for more than 90 minutes; and composite structures, especially highly stressed structures. One of the characteristic problems of ceramic matrices is their fragility. Indeed, when a fracture starts, it propagates easily in the matrix. Disclosed are elastic ceramic matrix composites (ECMCs), for which: the ceramic matrix is split into solid “ceramic microdomains” (CMDs); the CMDs are connected to one another by a dense network of “elastic microelements” (EMEs); and the bonds between the EMEs and the CMDs are strong chemical bonds, preferably covalent.

Optical wavelength conversion member and light-emitting device

One aspect of the disclosure provides an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula (Y,A)3B5O12:Ce. In the optical wavelength conversion member, a (Y,A)3B5O12:Ce crystal grain has a region wherein the A concentration of a peripheral portion of the (Y,A)3B5O12:Ce crystal grain is higher than that of an interior portion of the (Y,A)3B5O12:Ce crystal grain. Thus, the optical wavelength conversion member exhibits high fluorescence intensity (i.e., high emission intensity) and high heat resistance (i.e., low likelihood of temperature quenching). The optical wavelength conversion member has a structure wherein the element A concentration of a peripheral portion of a (Y,A)3B5O12:Ce crystal grain differs from that in an interior portion of the crystal grain. This structure can achieve a ceramic fluorescent body exhibiting superior fluorescent characteristics and superior thermal characteristics with varied colors of emitted light.