ФИЛЬТР, СОДЕРЖАЩИЙ ОБЪЕДИНЕННЫЙ КАТАЛИЗАТОР ДЛЯ ОКИСЛЕНИЯ САЖИ И NH-SCR КАТАЛИЗАТОР

Изобретение относится к фильтру с протеканием через стенки для фильтрования материала в виде частиц от протекающих отработанных газов и к способу его получения. Фильтр содержит катализатор для преобразования твердого углерода в материал в виде частиц с помощью кислорода и для селективного восстановления оксидов азота в отработанных газах с помощью азотистого восстановителя, причем катализатор содержит оксид церия и вольфрам. Изобретение также относится к выхлопной системе для транспортного средства, причем система содержит источник азотистого восстановителя, инжекционные средства для инжекции азотистого восстановителя в протекающих отработанных газах и фильтр с протеканием через стенки, расположенный после инжекционных средств. Технический результат заключается в уменьшении обратного давления в выхлопной системе, повышая эффективность двигателя. 3 н. и 10 з.п. ф-лы, 5 ил., 2 табл., 3 пр.

ТЕПЛОИЗОЛЯЦИОННОЕ ИЗДЕЛИЕ

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

ОБРАБОТКА ЗОЛЬНОГО УНОСА И ИЗГОТОВЛЕНИЕ ИЗДЕЛИЙ, СОДЕРЖАЩИХ СОСТАВЫ НА ОСНОВЕ ЗОЛЬНОГО УНОСА

Изобретение относится к составам на основе зольного уноса и может быть использовано для изготовления сравнительно тонких керамических изделий. Состав на основе зольного уноса формируют из смеси на основе зольного уноса, содержащей более 70% зольного уноса по сухому весу состава, пластификатор, служащий для связки частиц зольного уноса в составе, и, по желанию, одну или более керамических добавок. Смесь размалывают так, что средний размер частиц состава меньше 35 микрон. Сырое изделие желаемой формы, имеющее толщину меньше 40 мм, формуют из смеси воды и указанного порошкообразного состава на основе зольного уноса и пластификатора посредством прессования смеси при давлении больше 200 кг/см, после чего содержание воды в сыром изделии составляет меньше 12% общего веса смеси, а предел прочности при изгибе сырого изделия больше 1,5 кг/см. Способ может дополнительно содержать операцию предварительного просеивания зольного уноса или операцию декарбонизации зольного уноса, чтобы зольный унос имел ...

Способ изготовлени пенодиатомитовых кирпичей

Изобретение относится к производству строительных материалов, в частности к производству пенодиатомитовых кирпичей. Технический результат - получение пенодиатомитового кирпича с заданными технологическими свойствами и геометрическими параметрами, повышение прочности формованных изделий. Способ изготовления пенодиатомитовых кирпичей включает нагрев до максимальной температуры, выдержку в печи и ступенчатое охлаждение. Перед нагревом до максимальной температуры и выдержкой в печи изготовленную и разлитую пенодиатомитовую сырьевую массу в формы подвергают сушке в печах в течение времени и при температуре, достаточных для доведения остаточной влажности пенодиатомитовой сырьевой массы не более 20%, постепенному охлаждению до температуры окружающей среды, затем заготовки кирпичей подвергают распалубке, отбраковке и укладке на вагонетки. После этого заготовки кирпичей нагревают в печах до максимальной температуры в течение 1/3 части времени цикла термообработки, выдерживают при этой температуре ...

ЭКСТРУДИРОВАННЫЙ SCR-ФИЛЬТР

Изобретение относится к области очистки газов. Предложен фильтр с протеканием через стенки, содержащий катализатор для преобразования оксидов азота в присутствии восстанавливающего агента. Фильтр содержит экструдированную твердую массу, содержащую: 10-95% масс., по меньшей мере, одного компонента связующего вещества/матрицы; 5-90% масс. цеолитного молекулярного сита, нецеолитного молекулярного сита или смеси любых двух или более из них и 0-80% масс. необязательно стабилизированного оксида церия. Катализатор содержит, по меньшей мере, один металл, где: (i) по меньшей мере, один металл присутствует в экструдированной твердой массе, а также присутствует при более высокой концентрации на поверхности экструдированной твердой массы; (ii) по меньшей мере, один металл присутствует в экструдированной твердой массе, а также, его наносят в виде одного или нескольких слоев покрытия на поверхность экструдированной твердой массы, или (iii) по меньшей мере, один металл присутствует в экструдированной ...

ГРАФЕНОВЫЕ ЛИСТЫ И СПОСОБЫ ИХ ИЗГОТОВЛЕНИЯ

... 1. Способ изготовления графенового листа, при этом способ включает:нанесение раствора графена или оксида графита на подложку из вороненой стали;высушивание раствора для формирования листа графена или оксида графена на подложке из вороненой стали.2. Способ по п. 1, отличающийся тем, что способ дополнительно включает удаление графенового листа с подложки из вороненой стали.3. Способ по п. 1, отличающийся тем, что подложке из вороненой стали и графеновому листу позволяют высохнуть на воздухе в течение до 32 ч.4. Способ по п. 1, отличающийся тем, что подложку из вороненой стали с графеновым листом высушивают при помощи инфракрасного излучения.5. Способ по п. 1, отличающийся тем, что в ходе сушки к графену прикладывают напряжение смещения.6. Способ по п. 1, отличающийся тем, что раствор графена дополнительно включает раствор аммиака.7. Способ по п. 6, отличающийся тем, что аммиак присутствует в концентрации до 1%.8. Способ по п. 7, отличающийся тем, что аммиак присутствует в концентрации в диапазоне ...

ТЕПЛОИЗОЛЯЦИОННОЕ ИЗДЕЛИЕ

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

СПОСОБ ИЗГОТОВЛЕНИЯ МИШЕНИ НА ОСНОВЕ ОКСИДА ЦИНКА

... 1. Способ изготовления мишени на основе оксида цинка, включающий прессование смеси, содержащей, кроме прочего, порошок оксида цинка, отличающийся тем, что в состав смеси вносят порошок металлического цинка и наносят цинк на поверхность частиц порошка оксида цинка путем перетирания смеси при температуре в интервале от 100°С до 150°С. ! 2. Способ по п.1, отличающийся тем, что прессование смеси производят при температуре в интервале от 100°С до 150°С. ! 3. Способ по п.1, отличающийся тем, что после прессования или в ходе прессования производят обжиг при температуре от 400°С до 1450°С по заданной программе. ! 4. Способ по п.1, или 2, или 3, отличающийся тем, что при перетирании и/или обжиге нужную температуру обеспечивают СВЧ-нагревом.

КЕРАМИЧЕСКАЯ КОМПОЗИЦИЯ И СПОСОБ ПОЛУЧЕНИЯ УКАЗАННОЙ КОМПОЗИЦИИ

УСОВЕРШЕНСТВОВАННЫЙ СПОСОБ ПОЛУЧЕНИЯ ТЕРМОИЗОЛЯЦИОННОГО ПРОДУКТА ИЗ АЭРОГЕЛЯ ДИОКСИДА КРЕМНИЯ С ПОВЫШЕННОЙ ЭФФЕКТИВНОСТЬЮ

Способ изготовлени пенодиатомитовых кирпичей

... 1. Способ изготовления пенодиатомитовых кирпичей, включающий нагрев до максимальной температуры, выдержку в печи и ступенчатое охлаждение, отличающийся тем, что перед нагревом до максимальной температуры и выдержкой в печи, изготовленную и разлитую пенодиатомитовую сырьевую массу в формы, подвергают сушке в печах в течение времени и при температуре достаточных для доведения остаточной влажности пенодиатомитовой сырьевой массы не более 20%, постепенному охлаждению до температуры окружающей среды, затем заготовки кирпичей подвергают распалубке, отбраковке и укладке на вагонетки, после чего заготовки кирпичей нагревают в печах до максимальной температуры в течение 1/3 части времени цикла термообработки, выдерживают при этой температуре в течение следующих 1/3 части времени цикла термообработки, а затем в оставшееся время цикла термообработки выполняют ступенчатое охлаждение до температуры окружающей среды. 2. Способ по п.1, отличающийся тем, что после ступенчатого охлаждения кирпич подвергают ...

ТРОЙНОЙ КАТАЛИЗАТОР, СОДЕРЖАЩИЙ ЭКСТРУДИРОВАННУЮ ТВЕРДУЮ МАССУ

... 1. Тройной катализатор, содержащий экструдированную твердую массу, содержащую:10-95 мас.%, по меньшей мере, одного компонента связующего вещества/матрицы;5-90 мас.% цеолитного молекулярного сита, нецеолитного молекулярного сита или смеси любых двух или более из них и0-80 мас.% необязательно стабилизированного оксида церия,этот катализатор содержит, по меньшей мере, один благородный металл и, необязательно, по меньшей мере, один неблагородный металл, где:(i) по меньшей мере, один благородный металл находится в одном или нескольких слоях покрытия на поверхности экструдированной твердой массы;(ii) по меньшей мере, один металл присутствует в экструдированной твердой массе и, по меньшей мере, один благородный металл также находится в одном или нескольких слоях покрытия на поверхности экструдированной твердой массы или(iii) по меньшей мере, один металл присутствует в экструдированной твердой массе, присутствует при более высокой концентрации на поверхности экструдированной твердой массы и, по ...

Wässriges Bindemittelsystem für ein Schnellverfahren

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.

FEUERFESTE ISOLIERUNGSZUSAMMENSETZUNG UND VERFAHREN ZU IHRER HERSTELLUNG

Three-way catalyst comprising extruded solid body.

A three way catalyst comprises an extruded solid body comprising: 10-100% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (ii) at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on a surface of the extruded solid body; or (iii) at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on the surface of the extruded solid body.

A method of manufacturing a ceramic matrix composite article

Extruded SCR filter

Oxidation catalyst

An oxidation catalyst comprises an extruded solid body comprising: 10-100% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (iii) at least one metal is present throughout the extruded solid body and is also present in a higher concentration at a surface of the extruded solid body; (iv) at least one metal is present throughout the extruded solid body and is also carried in one or more coating layers on a surface of the extruded solid body; or (v) at least one metal is present throughout the extruded ...

INSULATING REFRACTORY PRODUCTS HAVING HIGH POROSITY AND THEIR METHOD OF PREPARATION

... 1498158 Refractory products GROUPEMENT POUR LES ACTIVITES ATOMIQUES ET AVANCEES SA 22 Dec 1975 [15 Jan 1975 21 Nov 1975] 52503/75 Headings C1H and C1J An insulating isotropic refractory product having a coefficient of thermal conductivity about 0À1 Kcal/m./‹ C./hr, a Young's Modulus of about 20,000 kg/sq. cm. and a tensile strength of about 12 kg/sq. cm. is prepared according to the following steps: (i) dry dispersing in calcium aluminate cement of ceramic fibres containing a percentage of silica less than 15%, the percentage of ceramic fibres in relation to the total weight of the dry mixture being at least equal to 60% and not more than 70% by weight; (ii) forming of concrete by adding water and putting in a mould; stripping from the mould after the beginning of the setting; (iii) drying outside the mould at a temperature increasing by 10‹ C. per hour with prolonged stages at 100‹ C. and 300‹ C.; rising at the same rate from 300‹ C. to 800‹ C.; (iv) baking at 800‹ C. in the open, setting ...

FROM WASTE MATERIALS MANUFACTURE CERAMIC COMPOSITION AND PROCEDURE FOR HERTSELLUNG SINTERED BODIES FROM IT

PROCEDURE FOR THE PRODUCTION OF A SILICON CARBIDE KOMPOSITS

INTERIOR COATING FOR A GASIFICATION REACTOR

PRODUCTION OF FIREPROOF ARTICLES BY A FREEZING CASTING PROCESS

GAS-PERMEABLE POROUS BODY, ITS PRODUCTION AS WELL AS PRINTING MOLD.

FIXED OXIDE GAS CELL

PRECISION MOLD AND MANUFACTURING PROCESS

Porous synthetic bone graft and method of manufacture thereof

Inorganic fibrous molded refractory article, method for producing inorganic fibrous molded refractory article, and inorganic fibrous unshaped refractory composition

Disclosed is an inorganic fibrous molded refractory article having high biosolubility, which is capable of achieving desired heat resistance without containing ceramic fibers such as alumina silicate fibers, alumina powder and silica powder and is reduced in the production cost and the production price. Specifically disclosed is an inorganic fibrous molded refractory article which is characterized by being formed from a material that contains 2-95% by mass of biosoluble inorganic fibers having a solubility in physiological saline at 40C of not less than 1% by mass, 2-95% by mass of an inorganic powder having a needle-like crystal structure and 3-32% by mass of a binder. More specifically, the inorganic powder having a needle-like crystal structure has an average length of 1-3,000 m and an aspect ratio of 1-1,000.

METHOD FOR PRODUCING A SILICON CARBIDE-CONTAINING BODY

The present invention relates to a process for producing a silicon carbide-containing body (100), characterized in that the process has the following process steps: a) providing a mixture (16) comprising a silicon source and a carbon source, the silicon source and the carbon source being present together in particles of a solid granular material; b) arranging a layer of the mixture (16) provided in process step a) on a carrier (12), the layer of the mixture (16) having a predefined thickness; and c) treating the mixture (16) arranged in process step b) over a locally limited area with a temperature within a range from = 1400°C to = 2000°C according to a predetermined three-dimensional pattern, the predetermined three-dimensional pattern being selected on the basis of the three-dimensional configuration of the body (100) to be produced. Such a process allows simple and inexpensive production even of complex structures from silicon carbide.

MANUFACTURING METHOD FOR CERAMIC MATRIX COMPOSITE

Provided is a ceramic-based composite material manufacturing method which is unlikely to result in strength deterioration and with which it is possible to shorten manufacturing time. This manufacturing method is for a ceramic-based composite material having a woven fabric that has multiple fiber bundles and having a matrix that is disposed in the gaps between the fiber bundles, the manufacturing method comprising: a base body formation step for forming a base body by calcining the woven fabric impregnated with a polymer that is a precursor to the matrix; and a densification step for further impregnating the base body with a polymer and calcining same. The densification step comprises: a second impregnation step for further impregnating the base body with a polymer so as to form an impregnated base body; a drying step for drying the impregnated base body so as to form a dried base body; a steam treatment step for leaving the dried base body under saturation water vapor pressure so as to ...

METHOD FOR PRODUCTION OF POROUS CERAMIC MATERIAL

The present invention provides a method of producing a porous ceramics material, which rapidly leads formation of a tissue, for example, bone tissue and has a practical strength. A method of producing a porous ceramics material 11, including step (A): a step of preparing a slurry 21 by dispersing a ceramics raw material in a medium, step (B): a step of filling the slurry 21 in a container 31, and inserting the container 31 in a given direction into a cooling medium 41 having a temperature not higher than the freezing point of the slurry 21 such that the slurry freezes unidirectionally from one end side, step (C): a step of drying the frozen slurry 21 to give a green body, and step (D): a step of firing the green body.

GRAPHENE SHEETS AND METHODS FOR MAKING THE SAME

The invention relates to graphene sheets and to a method for making the same in which a solution of graphene or graphite oxide is applied to a blue steel substrate and dried.

Prismatic or cylindrical honeycomb filter for the removal of fine dust particles from an exhaust gas stream of diesel engines, comprises channels running parallel in a z-direction of the spatial coordination, and an open porous inner wall

The prismatic or cylindrical honeycomb filter for the removal of fine dust particles from an exhaust gas stream (22) of diesel engines, comprises channels (12, 14) running parallel in a z-direction of the spatial coordination, and an open porous inner wall for separating the channels from one another. The channels are alternately closed in the area of the two front-side openings (16, 18) in x- and y-directions. Each channel has a closed- and a free opening (16, 18). The porous inner wall comprises a non-calcined monolith matrix of a ceramic powder (85-90%) having a particle size of 60 mu m. The prismatic or cylindrical honeycomb filter for the removal of fine dust particles from an exhaust gas stream (22) of diesel engines, comprises channels (12, 14) running parallel in a z-direction of the spatial coordination, and an open porous inner wall for separating the channels from one another. The channels are alternately closed in the area of the two front-side openings (16, 18) in x- and y-directions ...

PREDECESSORS AND METHODS OF TRANSFER AT HYDRO THE THERMAL LIQUID PHASE SINTERING (HLPS)

PREPARATION OF SINTERABLE GARNET-STRUCTURE COMPLEX OXIDE POWDER AND MANUFACTURING OF TRANSPARENT CERAMICS

Method for making ceramic-coloring clay bricks using waste batteries powder

Provided is a method for making a ceramic clay brick using waste battery powder. Valuables of the waste batteries are separated through a crushing, pyrolysis, pulverizing, and magnetic separation processes. The remaining waste battery powder is processed in order to utilize the remaining waste battery powder as a colorant in a brick making process. Clay powder is added to the processed waste battery powder to make a black-colored, dark red-colored, or dark brown- colored brick according to its contents. According to the present invention, since the waste battery powder mainly including manganese and zinc can be processed into the colorant and mixed with the clay powder to make the black-colored, dark red-colored, or dark brown-colored brick according to its contents, purchase costs MnO2 used as the colorant during the making process of the ceramic brick can be remarkably reduced. In addition, superior bricks can be made at low cost. Particularly, since the waste batteries are recycled, ...

Preparation of palladium-gold catalyst

A method for preparing a palladium-gold catalyst containing a titania extrudate is disclosed. The titania extrudate is produced by using a carboxyalkyl cellulose and a hydroxyalkyl cellulose as extrusion aids. The titania extrudate has improved processibility and/or mechanical properties. After calcination, the extrudate is used as a carrier for the palladium-gold catalyst. The catalyst is useful in producing vinyl acetate by oxidizing ethylene with oxygen in the presence of acetic acid.

Dielectric material having giant-dielectric-constant high insulating property and preparation method of dielectric material

Method for drying honeycomb formed article

There is provided a method for drying a honeycomb formed article 1. The method has the first step, where an unfired honeycomb formed article 1 having a plurality of cells separated by partition walls made from raw material composition containing a ceramic rawmaterial, water, and a binder is heated and dried by microwave drying or dielectric drying, and a second step, where the honeycomb formed article 1 is dried by hot air drying, where hot air whose humidity was adjusted to have a wet-bulb temperature of 50 to 100 DEG C using a hot air drying apparatus 11 after the first step is passed through the cells. The method can dry a honeycomb formed article in a shorter period of time with inhibiting generation of a defect such as a deformation or breakage.

Porous synthetic bone graft and method of manufacture thereof

Fireproof material used for furnace wall above liquid line of nonferrous metallurgy smelting furnace and preparation method of fireproof material

FILTER STRUCTURE INCLUDING/UNDERSTANDING A MATERIAL OF STOPPING IMPROVES

Structure filtrante de gaz chargés en particules, du type en nid d'abeilles, ladite structure se caractérisant en ce que : a) les parois filtrantes de la dite structure en nid d'abeille sont constituées d'un matériau présentant après cuisson un coefficient de dilation thermique moyen, mesuré entre 25 et 1100°C, inférieur à 2,5.10-6 K-1 , et b) le matériau constituant les bouchons comprend : - une charge formée de grains réfractaires dont la température de fusion est supérieure à 1500°C et dont le diamètre médian est compris entre 5 et 50 microns, - une phase liante vitreuse c) le coefficient de dilation thermique moyen dudit matériau constituant les bouchons, mesuré entre 25 et 1100°C, est au moins égal à 4,8.10-6.K-1, de préférence au moins égal à 5, 0 .10-6 .K-1 .

REFRACTORY PRODUCT HAS MATRIX OF SIAION, ALUMINA AND SILICON.

REFRACTORY PRODUCT HAS MATRIX OF SIAION, ALUMINA AND SILICON.

PHOSPHOR PRODUCT, AND/OR MANGANESE

Procédé comportant les étapes: A) préparation d'une charge de départ comportant un produit présentant une perte au feu à 1000°C inférieure à 25%, et, après perte au feu, une analyse chimique telle que: - 17,0% < P < 27,0%, Fe + Mn tel que 0,4 < (Fe + Mn)/P < 1,4, (rapport molaire) autres éléments que P, Fe, Mn, H et O < 5,0%, H + O : complément à 100%, le produit comportant une phase autre que la strengite ou une métastrengite, ladite phase comportant des éléments oxygène et phosphore d'une part et l'élément fer et/ou l'élément manganèse d'autre part, et une phase cristallisée et choisie : - si (Fe + Mn)/P ≥ 0,8 : - dans le groupe Go constitué par les phases cristallisées d'oxydes de fer, d'oxydes de manganèse, d'oxydes mixtes de fer et de manganèse, dans le groupe GH constitué par les phases cristallisées d'hydroxydes de fer et d'hydroxydes de manganèse, - dans le groupe constitué par les phases cristallisées de phosphates de manganèse et de phosphates mixtes de manganèse et de fer, - ...

METHOD OF MANUFACTURING CERAMICS ZIRCONIA COLORED

Ce procédé de fabrication d'une pièce céramique en zircone colorée de façon homogène dans tout le volume de la pièce, comporte les étapes successives suivantes : (a) préparation d'une pâte de zircone par mélange d'au moins une poudre de zircone frittable, d'au moins un liant photodurcissable, d'au moins un photoamorceur et d'au moins un plastifiant ; (b) préparation par la technique des procédés additifs d'une pièce blanche céramique à partir de la pâte de zircone préparée à l'étape (a) ; (c) déliantage de la pièce blanche céramique obtenue à l'étape (b) ; (d) préfrittage de la pièce blanche obtenue à l'étape (c) pendant un laps de temps et à une température choisis pour que la pièce blanche présente une microporosité intergranulaire entre 10 et 60 % en volume ; (e) coloration de la pièce préfrittée obtenue à l'étape (d) par trempage dans une solution colorante comprenant un solvant et au moins un sel ou oxyde colorant choisi pour colorer la pièce dans la couleur souhaitée ; et (f) frittage ...

CERAMIC STRUCTURES

Composition de céramique éventuellement sous la forme d'une structure en nid d'abeilles, composition précurseur de céramique propre au frittage afin de former la composition de céramique, procédé de préparation de la composition de céramique et structure de céramique en nid d'abeilles, filtre pour particules pour moteur diesel comprenant la structure de céramique en nid d'abeilles, et véhicule comprenant le filtre de particules pour moteur diesel.

METHOD FOR PRODUCTION OF POROUS CERAMIC MATERIAL

연마 입자 및 이의 형성 방법

... 연마 입자는 제 1 주면, 제 1 주면에 대향하는 제 2 주면, 및 제 1 주면과 제 2 주면 사이에서 연장되는 측면을 포함하는 몸체를 가지고, 측면의 대부분은 다수의 미세리지 (microridge)를 포함한다.

CERAMIC JOINT BODY

In a semiconductor device production/inspection step, it is possible to provide a ceramic joint body in which a ceramic substrate having an excellent corrosion resistance is firmly attached to a ceramic member such as a cylindrical member. The ceramic substrate has a conductive body inside. A ceramic member is attached to the bottom of the ceramic substrate. An area not having the conductive body exists at least at a part of an upper region of the joint boundary between the ceramic substrate and the ceramic member. © KIPO & WIPO 2007 ...

HEAT-INSULATING FIREBRICK

COATING MATERIAL FOR THICK GREEN SHEET, PROCESS FOR PRODUCING THE SAME, AND PROCESS FOR PRODUCING ELECTRONIC COMPONENT WITH THE COATING MATERIAL

A coating material for thick green sheet that can realize relatively thick coating and that with respect to a sheet resulting from the coating, excels in cutting property (strength capable of cutting), also excelling in air permeability and handling easiness, which coating material enables formation of a sheet of high bonding strength; a process for producing the coating material for thick green sheet; a process for producing a thick green sheet; a thick green sheet; and a process for producing an electronic component. There is provided a coating material for thick green sheet comprising a ceramic powder, a binder resin composed mainly of a butyral resin, and a solvent, wherein the solvent contains a good solvent capable of dissolving the binder resin to a high degree and a poor solvent whose capability of dissolving the binder resin is lower than that of the good solvent. The poor solvent is contained in a ratio ranging from 30 to 60 mass% based on the whole solvent. The good solvent is ...

BORON-DOPED REFRACTORY MATERIAL HAVING A SIAION MATRIX

The invention relates to a fritted refractory material comprising a refractory aggregate bonded by a matrix, the matrix being at least 5 and less than 60 wt% of the material, said matrix comprising, in the weight thereof, a crystallized SiAION phase having the formula SixAIyOuNv, where: x is greater than or equal to 0 and less than or equal to 1; y is greater than 0 and less than or equal to 1; u is greater than or equal to 0 and less than or equal to 1; v is greater than 0 and less than or equal to 1; and at least one of the stoichiometric indices x, y, u, or v is equal to 1. Said material comprises: content greater than 5 wt% in said SiAION phase; boron content that is not in the form of a hexagonal BN phase and is greater than 0.05 wt% and less than 3.0 wt%; content less than 10 wt% in the BN hexagonal phase; and content less than 5 wt% in the Si3N4 phase, the weight percentages being on the basis of said material.

REFRACTORY SHAPED CERAMIC BODIES, IN PARTICULAR FIRING AUXILIARIES, AND PROCESS FOR THE PRODUCTION THEREOF

A process for producing refractory shaped ceramic bodies comprising at least 60% by volume of mullite, based on the total mass of the refractory shaped ceramic body, which has the following steps: - provision or production of a freezing-sensitive and flowable slip consisting of or comprising water and (i) mullite particles, (ii) colloidally dispersed silicon dioxide particles and preferably (iii) aluminium oxide particles and optionally comprising (iv) further ceramic constituents and/or (v) further nonceramic constituents, - provision of a casting mould, - introduction of the slip into the casting mould, - freezing of the slip in the casting mould so as to form an intermediate body, - drying of the intermediate body and - sintering of the dried intermediate body in such a way that silicon dioxide particles are entirely or partly reacted to form mullite and the refractory shaped ceramic body, is described. Corresponding shaped bodies and their use as firing auxiliaries are also described ...

ALN SUBSTRATE AND METHOD FOR PRODUCING SAME

Provided are an AlN substrate which has excellent heat transfer efficiency between other members such as a semiconductor substrate to be bonded to a bonding surface, and a method for producing the AlN substrate. The AlN substrate is composed of an AlN sintered body containing a 2A group element and a 3A group element, surface roughness Ra of the bonding surface is 3 nm or less, and the mean value of the length of voids with a length of 0.25 μm or more that are exposed on the bonding surface is 1.5 μm or less, the maximum value being 1.8 μm or less. The method for producing the AlN substrate comprises sintering, at a temperature of 1,500-1,900°C, a precursor formed of a sintering material which contains 88.7-98.5 mass% of AlN, 0.01-0.3 mass% of a 2A group element calculated as oxide and 0.05-5 mass% of a 3A group element calculated as oxide to form a sintered body and HIP treating the sintered body at a temperature of 1,450-2,000°C and at a pressure of 9.8 MPa or more.

DRYING JIG ASSEMBLING UNIT, DRYING JIG DISASSEMBLING UNIT, DRYING JIG CIRCULATING APPARATUS, METHOD OF DRYING CERAMIC MOLDING, AND PROCESS FOR PRODUCING HONEYCOMB STRUCTURE

A drying jig circulating apparatus that is capable of laborsaving efficient drying of ceramic molding. There is provided a drying jig circulating apparatus including a drying jig assembling unit for causing a drying jig to hold a ceramic molding; a dryer for drying of the ceramic molding held by the drying jig; a drying jig disassembling unit for demounting of the ceramic molding held by the drying jig; and a drying jig circulating conveyor for delivery of the drying jig, characterized in that the drying jig assembling unit includes molding mounting means for mounting of the ceramic molding on the drying jig, jig locking means for locking of the drying jig by a locking member and jig delivery means for delivery of the drying jig to the dryer, and that the drying jig disassembling unit includes jig receiving means for receiving of the drying jig from the dryer, jig releasing means for releasing of the locking member of the drying jig and molding demounting means for demounting of the ceramic ...

MICROWAVE STIFFENING SYSTEM FOR CERAMIC EXTRUDATES

An apparatus and method for stiffening an wet extruded ceramic body for improved handling prior to drying and firing. The ceramic body is formed from a plastically deformable material including inorganic raw materials, and organics, such as a binder having a thermal gel point. As the ceramic body log exits the extruder die it is passed through a microwave energy field to be heated to above the gelling point of the organic binder. The ceramic body then stiffens and can be easily handled without deformation.

AGGLOMERATED ALUMINA CONTAINING PRODUCT

The invention relates to a method for producing an agglomerated product containing alumina which is useful as a component to be incorporated into a synthetic slag as used in steel making. The product is formed from powdered aluminium dross which is formed with water into pellets or briquettes and wherein the components of the pellets or briquettes are allowed to react at elevated pressure to release ammonia. The pellets or briquettes may then be calcined.

TRANSLUCENT POLYCRYSTALLINE ALUMINA CERAMIC

A polycrystalline alumina body includes aluminum oxide, magnesium oxide, zirconium oxide, and lutetium oxide. The lutetium oxide is present in an amount of at least 10 ppm of the weight of the ceramic body, and the magnesium and zirconium oxides are present at a molar ratio of from 0.5:1 to 3:1.

SYSTEM AND METHOD FOR PRODUCTION OF MEMBRANE

System and method for production of membrane having high strength, enhanced thermal stability and chemical resistance comprising of at least two furnace plates, at least one heating coils encased in ceramic disc housing, metal sheet and base. Perforated ceramic discs of the invention are mounted on a movable stand and equipped with heating mantle, insulation and is encased in a metallic cover. The pores present on ceramic disc not only helps in dissipation of gases emanating from heating of wet metal oxide gel diaphragms but also conducts the heat from heating coil to it. The pores in the ceramic disc plays dual role i.e. exit of trapped water and other organic matter as well as entry of heat towards the wet gel films for faster drying. On the other hand the perforated ceramic disc has a major role to play in preventing the deformation likely to occur during sintering of semidried metal oxide gel diaphragms by putting a vertical pressure and controlling its morphology as the heating progresses ...

METHOD FOR MODIFYING SILICIC CRYSTALLINE MATERIALS

The invention relates to a method for modifying silicic crystalline materials consisting i) in bringing a silicic crystalline material into contact with the aqueous solution of alkali metal silicate also comprising an ion complexing additive and ii) in evaporating water. A composite obtainable by said method and the use of the aqueous solution of alkali metal silicate for inerting the silicic crystalline materials, in particular asbestos are also disclosed.

CRUCIBLE FOR MELTING AND CRYSTALLIZING A METAL, A SEMICONDUCTOR, OR A METAL ALLOY, COMPONENT FOR A CRUCIBLE BASE BODY OF A CRUCIBLE, AND METHOD FOR PRODUCING A COMPONENT

The invention relates to a crucible for melting and crystallizing a metal, a semiconductor material, or a metal alloy, wherein a crucible wall of a crucible base body is made at least partially of a crucible material comprising silicon nitride and silicon dioxide at a weight ratio of between about 1:10 and about 1:1 (Si3N4 : SiO2). The invention further relates to a component for a crucible base body of a crucible for melting and crystallizing a metal, a semiconductor material, or a metal alloy, wherein a component segment is made at least partially of a crucible material comprising silicon nitride and silicon dioxide at a weight ratio of between about 1:10 and about 1:1 (Si3N4 : SiO2), and to a method for producing a component for a crucible base of a crucible for melting and crystallizing a metal, a semiconductor material, or a metal alloy, wherein a component segment is formed at least partially of a crucible material comprising silicon nitride and silicon dioxide at a weight ratio of ...

THREE WAY CATALYST COMPRISING EXTRUDED SOLID BODY

A three way catalyst comprises an extruded solid body comprising: 10-100% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non- precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (ii) at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on a surface of the extruded solid body; or (iii) at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on the surface of the extruded solid body.

FILTERING STRUCTURE, INCLUDING PLUGGING MATERIAL

The invention relates to a honeycomb structure that filters charged gases and particles, said structure being characterized in that: a) the filtering walls of said honeycomb structure are made of a material having, after curing, a mean heat expansion coefficient that is measured between 25° C and 1100° C and is less than 2.5 x 10-6 K-1, and b) the material making up the plugs includes a filler formed of refractive grains, the melting temperature of which is greater than 1500° C and the median diameter of which is between 5 and 50 microns, said material also including a vitreous bond phase.

PROCESS FOR RECOVERY OF RESIDUES OF KRAFT PAPERMAKING PRODUCTION

Process for recovery of residues of Kraft papermaking production comprising Mud of Whitewash as well as dregs, said process consisting of the substitution of part of the components by said residues in the ceramic mass employed for the manufacture of wall and floor tiles. In the ceramic mass used for gresifyed (semi-stoneware) tiles, from 2 % to 7,5 % of the feldspar is substituted by said residues, while in the monoporous tiles ceramic mass comprising calcite, said calcite can be substituted by said residues up to 40 % by weight.

COMPOSITE FORMED OF CUBIC BORON NITRIDE AND METHOD OF MAKING THEREOF

A cubic boron nitride (cBN)-based composite including about 30-65 vol. % cBN, about 15-45 vol. % titanium (Ti)-containing binders, about 2-20 vol. % zirconium dioxide (ZrO), about 3-15 vol. % cobalt-tungsten-borides (CoWB), and about 2-15 vol. % aluminum oxide (AlO). 1. A cubic boron nitride (cBN)-based composite , comprising:about 30-65 vol. % cBN;about 15-45 vol. % titanium (Ti)-containing binders;{'sub': '2', 'about 2-20 vol. % zirconium dioxide (ZrO);'}{'sub': x', 'y', 'z, 'about 3-15 vol. % cobalt-tungsten-borides (CoWB); and'}{'sub': 2', '3, 'about 2-15 vol. % aluminum oxide (AlO).'}2. The cBN-based composite of claim 1 , further comprising less than or equal to about 10 vol. % titanium diboride (TiB).3. The cBN-based composite of . comprising about 45-55 vol. % cBN claim 1 , about 15-30 vol. % Ti-containing binders claim 1 , about 5-13 vol. % ZrO claim 1 , about 5-10 vol. % CoWB claim 1 , about 5-10 vol. % AlO.4. The cBN-based composite of claim 3 , further comprising less than 10 vol. % TiB.5. The cBN-based composite of claim 1 , wherein the CoWBcomprises crystalline CoWB claim 1 , crystalline CoWB claim 1 , crystalline WCoB claim 1 , or a combination thereof.6. The cBN-based composite of claim 1 , wherein the W and Co are present in a W/Co weight ratio of about 3 to about 8.7. The cBN-based composite of claim 1 , wherein the Ti-containing binders comprise titanium nitride (TiN) claim 1 , titanium carbo-nitride (TiCN) claim 1 , titanium carbide (TiC) claim 1 , titanium-carbo-oxinitride (TiCON) claim 1 , titanium-oxinitride (TiNO) claim 1 , or a combination thereof.8. The cBN-based composite of claim 1 , wherein the cBN has a grain size of about 0.1-4 micrometer (μm).9. The cBN-based composite of claim 1 , wherein the cBN has a grain size of about 0.1-2 micrometer (μm).10. The cBN-based composite of claim 1 , wherein the cBN has a grain size of about 0.1-1 micrometer (μm).11. A cutting tool for cutting superalloys comprising Inconel 718 claim 1 , Inconel 625 ...

Slurry for making ceramic insulation

A fibrous ceramic mat is molded from a slurry of ceramic fibers and/or ceramic microparticles and/or a metal. The mat is impregnated with a sol prior to drying. A catalyst for the sol is introduced into the mat to cause the sol to gel. The sol-gel binder forms bonds so that the mat is dimensionally stabilized. The mat is dried to produce the desired ceramic insulation that has preferably a consistent microstructure and a fully gelled sol-gel binder through its entire thickness. When a metal is used, it corrodes (i.e., oxidizes) or otherwise reacts to form a refractory binder that augments the sol and reduces the need to infuse sol incrementally to achieve strength. Using metal powder significantly reduces the cost of manufacture.

Rigidized refractory fibrous ceramic insulation

A slurry is molded from ceramic fibers and/or microparticles to form a soft felt mat which is impregnated with a sol prior to drying the mat. A catalyst for the sol is caused to diffuse into the mat by exposing the mat to the catalyst and subjecting the mat to a soak time during which the catalyst diffuses into the mat and causes the sol to gel. The sol-gel binder forms bonds so that the mat is dimensionally stabilized. The mat is dried to produce ceramic insulation, ceramic insulation having a consistent microstructure and a fully gelled sol-gel binder through its entire thickness.

PROCESS FOR PRODUCING SIO2 MOULDINGS

The present invention relates to a process for producing SiO2 mouldings, comprising the preparation of a free-flowing aqueous SiO2 composition, solidification of the aqueous SiO2 composition and drying of the solidified SiO2 composition, wherein the aqueous SiO2 composition is a self-assembly composition. The present invention further relates to a moulding obtainable by the process according to the invention.

Porous body, honeycomb filter, method for producing porous body, and method for producing honeycomb filter

A porous body constituting a porous partition wall 44 of a honeycomb filter 30 has a porosity P of 20% to 60%, a permeability k of 1 μm2 or more and satisfies k≥0.2823 P−10.404. The porous body is obtained by a method for producing, for example, includes (a) a step of acquiring porous body data representing a temporary porous body having porosity higher than target porosity, (b) a step of deriving information about a flow rate for each space voxel during passage of a fluid through inside of the porous body, (c) a step of preferentially replacing the voxel having a low flow rate among the space voxels with the object voxel, and adjusting the porosity of the porous body data to the target porosity, and (d) a step of forming a porous body based on the porous body data after replacement.

Fiber reinforced zeolite extrudates with enhanced physical properties

The invention relates to a method of making a reinforced catalytic microporous and/or mesoporous bound composition comprising the steps of: providing a pre-formed catalytic crystalline material; mixing the catalytic crystalline material with water, a metal oxide binder, and a reinforcing glass fiber to form an extrudable composition; extruding the extrudable slurry under conditions sufficient to form the reinforced catalytic bound extrudate; and calcining the reinforced catalytic bound extrudate at a temperature and for a time sufficient to form a calcined reinforced catalytic bound catalyst. Advantageously, the reinforcing glass fiber can have a diameter from 5-100 microns and a length-to-diameter ratio from 300:1-3000:1 and can be present in an amount from about 1-50 parts, based on about 1000 parts combined of catalytic crystalline material and metal oxide binder.

HONEYCOMB STRUCTURE

A honeycomb structure includes honeycomb segments, bonding layers and a circumferential wall. The bonding layers include bottomed-hollow voids which extend toward an internal side in an axial direction from an end face of the honeycomb structure and which are formed at at least one of intersections, and a ratio of a depth of each void in the axial direction to a length of each honeycomb segment in the axial direction is 5% or more.

Duplex eutectic silicon alloy, manufacturing method thereof, and manufacturing method of sintered compact using silicon alloy powder

A duplex eutectic silicon alloy including 30-70 weight % silicon, 10-45 weight % nitrogen, 1-40 weight % aluminum, and 1-40 weight % oxygen has a eutectic structure comprising a beta'-sialon phase and an omicron'-sialon phase. The alloy is produced by controlling cooling at a rate of 50° C. or less per minute in combustion synthesis. A ductile sintered product capable of replacing steel in various applications can be produced by placing a compact composed of a powder of the alloy in a sintering furnace which can supply a heat quantity at least ten times the heat capacity of the compact; and sintering the compact at a pressure at least as great as atmospheric pressure, within a nitrogen atmosphere in which the silicon gas mole fraction is 10% or more, and at a temperature within the range from 1400° C. to 1700° C.

Method of bonding ceramics structures

A method of bonding at least a first ceramics structure (101) to a second ceramics structure (102), which includes the steps of applying a pressure to the first ceramics structure (101) and the second ceramics structure (102) in such a direction that these structures move close to each other with a bonding material layer (110) interposed between the first ceramics structure (101) and the second ceramics structure (102) (FIG. A), removing a bonding material (111a) extruded from the bonding material layer (110) to an end face of a stacked body including the first ceramics structure (101) and the second ceramics structure (102) by the application of the pressure thereto (FIG. B), drying a bonding material (111b) near the end face of the stacked body (120) after the extruded bonding material (111a) is removed (FIG. C), and drying the entire part of the stacked body (120).

CERAMIC GREEN SHEET DRYING APPARATUS AND METHOD OF FABRICATING CERAMIC GREEN SHEET USING THE SAME

There is provided a method of fabricating a ceramic green sheet, the method including: forming a ceramic green sheet by applying ceramic slurry onto a support substrate; and drying the ceramic green sheet by allowing the ceramic green sheet to pass through a plurality of drying zones, wherein positive internal differential pressure is applied to at least one of drying zones disposed at a front end of the plurality of drying zones, the internal differential pressure being defined as a pressure value obtained by subtracting a discharging pressure (Pout) of each drying zone from an introducing pressure (Pin) thereof.

SPINEL-REINFORCED MAGNESIUM OXIDE-BASED FOAM CERAMIC FILTER AND PREPARATION METHOD THEREFOR

A spinel-reinforced magnesium oxide-based foam ceramic filter that is obtained by by coating onto a polyurethane foam carrier a slurry of light calcined magnesium oxide-based ceramic comprising a nanometer lanthanum oxide sintering aid, and then drying and sintering. A method for preparing the foam ceramic filter comprising: 1) preparing a ceramic slurry having a solid content of 60%-70% by dosing 15%-25% by mass of a nanometer alumina sol, 0.8%-1.5% by mass of a rheological agent, and the balance magnesium oxide ceramic powder comprising a nanometer lanthanum oxide sintering aid, and then adding absolute ethanol and ball milling to mix until uniform; 2) soaking a polyurethane foam template into the ceramic slurry, squeezing by a roller press the polyurethane foam template to remove redundant slurry therein to make a biscuit, and then removing the ethanol solvent in a ventilation chamber at a temperature of 40° C.-50° C. to dry the biscuit; 3) putting the dried biscuit into a sintering ...

MANUFACTURING METHODS OF CERAMIC FIRED BODY, HONEYCOMB STRUCTURE, AND EXHAUST GAS CONVERTING DEVICE, AND DRYING APPARATUS

A manufacturing method of a ceramic fired body includes forming a composition of ceramic raw material containing water to make a ceramic molded body. The ceramic molded body is irradiated with a microwave under a depressurized atmosphere of about 1 KPa or more and about 50 kPa or less to dry the ceramic molded body. The ceramic molded body is fired to make the ceramic fired body.

POROUS SHAPED CARBON PRODUCTS

Shaped porous carbon products and processes for preparing these products are provided. The shaped porous carbon products can be used, for example, as catalyst supports and adsorbents. Catalyst compositions including these shaped porous carbon products, processes of preparing the catalyst compositions, and various processes of using the shaped porous carbon products and catalyst compositions are also provided.

Method for producing powder molded product and powder molded product

A powder molded product produced through molding of a slurry containing a powdery molding raw material, a dispersion medium for dispersing the molding raw material, a dispersant for uniformly dispersing the molding raw material in the dispersion medium, a binder precursor for producing an organic binder through a chemical reaction, a reaction promoter for promoting the chemical reaction, and a pseudo-plasticity-imparting agent for imparting pseudo-plasticity to the slurry. The method for producing a powder molded product of the present invention includes a slurry preparation step; a molding step of molding the prepared slurry into a primary molded product having a specific shape; and a drying-solidification step of solidifying the slurry by promoting the aforementioned chemical reaction in the primary molded product, and removing, through evaporation, the dispersion medium from the primary molded product.

Method for preparing ceramic molded body for sintering and method for producing ceramic sintered body

A method includes molding a raw material powder containing a ceramic powder and a thermoplastic resin having a glass transition temperature higher than room temperature into a shape by isostatic pressing and in which a raw material powder slurry is prepared by adding the ceramic powder and the thermoplastic resin to a solvent so that the thermoplastic resin is 2% by weight or more and 40% by weight or less with respect to a total weight of the ceramic powder and the thermoplastic resin, a cast-molded body is to formed by wet-casting the raw material powder slurry into a shape, dried, and subjected to first-stage isostatic press molding at a temperature lower than the glass transition temperature of the thermoplastic resin, then this first-stage press-molded body is heated to the glass transition temperature of the thermoplastic resin or above, and warm isostatic press (WIP) molding is performed.

Silicon carbide composite and process for production

Sintered silicon carbide composites containing diamond crystals are described. They are made through a process comprising: (a) forming a first dispersion of diamond crystals and carbon black in paraffin; (b) forming a second dispersion of carbon fiber, carbon black and filler in paraffin; (c) compacting said dispersions together to produce an integral bi-layer composite; (d) subjecting said composite to a vacuum for a period of time at a temperature sufficient to vaporize essentially all of said paraffin; (e) heating silicon to cause liquefaction and direct infiltration into both layers of said composite; and (f) sintering the composite containing silicon under conditions sufficient to produce a ß-silicon carbide binder uniting said composite. The resultant composites are particularly useful as cutting materials and/or wear components, where they exhibit extreme wear resistance.

METAL OXIDE CERAMIC MATERIAL, PRECURSORS, PREPARATION AND USE THEREOF

METAL OXIDE CERAMIC NANOMATERIALS AND METHODS OF MAKING AND USING SAME

MANUFACTURING METHOD OF HONEYCOMB STRUCTURE AND DRYING DEVICE USED THEREIN

PROBLEM TO BE SOLVED: To provide a manufacturing method of a honeycomb structure suppressing the deformation of a honeycomb molded object at the time of drying and preventing trouble such as cracking, wrinkles, etc., and a drying device used therein. SOLUTION: The manufacturing method of the honeycomb structure has a molding process for molding the honeycomb molded object by subjecting a ceramic material, which contains at least a cordierite raw material, water and a binder, to extrusion molding to cut the extrudate into a predetermined length, a drying process for irradiating the honeycomb molded object with a microwave to dry the same, and a firing process for firing the honeycomb molded object to obtain the honeycomb structure. The drying process is divided into a plurality of steps, and in a first step S1, the center temperature of the honeycomb molded object reaches at least the curing start temperature of the binder from the start of drying, wherein the output of the microwave for ...

КАТАЛИЗАТОРЫ ПОГЛОЩЕНИЯ NOX

Изобретение относится к катализаторам поглощения NOx. Катализатор содержит 10-100% масс. по меньшей мере одного компонента связующего вещества/матрицы и 5-90% масс. цеолитного молекулярного сита, нецеолитного молекулярного сита или смеси любых двух или более из них. Катализатор содержит по меньшей мере один металл, включая (a) по меньшей мере один благородный металл; и (b) по меньшей мере один щелочной металл или по меньшей мере один щелочноземельный металл. (a) и (b) наносят в виде одного или нескольких слоев покрытия на поверхности экструдированной твердой массы. Либо катализатор содержит 10-100% масс. по меньшей мере одного компонента связующего вещества/матрицы и 5-80% масс. необязательно стабилизированного оксида церия. Также содержит по меньшей мере один металл, включая (a) по меньшей мере один благородный металл; и (b) по меньшей мере один щелочной металл или по меньшей мере один щелочноземельный металл. Технический результат: уменьшение обратного давления в выхлопной системе, увеличение ...

ЖАРОСТОЙКАЯ ШИХТА И ЕЕ ПРИМЕНЕНИЕ

Изобретение относится к шихте из минеральных жаростойких материалов и может быть использовано для футеровки агрегатов для плавки цветных металлов. Заявленная шихта содержит более 90 вес.% смеси следующих компонентов (вес.%): 3-74 по меньшей мере одного крупнозернистого оливинового сырья с содержанием форстерита по меньшей мере 70 вес.%, зёрна которого имеют размер более 0,1 мм; 25-49 по меньшей мере одной магнезии в виде тонкого порошка, у которого зёрна имеют размер ≤1 мм; 0,9-14 карбида кремния (SiC) с размером зёрен ≤1 мм; 0,1-10 по меньшей мере одной тонкодисперсной порошкообразной кремниевой кислоты с размером частиц ≤500 мкм; 0-4 антиоксиданта для огнеупорных продуктов; 0-4 жаростойкой гранулированного сырья с размером частиц более 0,1 мм; 0-2 по меньшей мере одной известной присадки; 0-4 добавки жаростойких материалов; 0-10 по меньшей мере одного известного вяжущего для огнеупорных продуктов, в сухой форме или в отдельно упакованной жидкой форме. Гранулированный заполнитель или добавка ...

ОБРАБОТКА ЗОЛЬНОГО УНОСА И ИЗГОТОВЛЕНИЕ ИЗДЕЛИЙ, СОДЕРЖАЩИХ СОСТАВЫ НА ОСНОВЕ ЗОЛЬНОГО УНОСА

... 1. Состав на основе зольного уноса, содержащий зольный унос и пластификатор и имеющий форму порошка, где пластификатор способен связывать вместе частицы зольного уноса в составе на основе зольного уноса после прессования этого состава.2. Состав по п. 1, в котором средний размер частиц состава меньше 50 микрон.3. Состав по п. 1 или 2, в котором пластификатор хорошо перемешан с зольным уносом.4. Состав по п. 1 или 2, в котором пластификатор по крайней мере частично обволакивает частицы зольного уноса.5. Состав по п. 1 или 2, содержащий более 70% зольного уноса по сухому весу состава.6. Состав по п. 1 или 2, содержащий от 70% до 95% зольного уноса по сухому весу состава.7. Состав по п. 1 или 2, в котором пластификатор содержит силикат алюминия со значительными реологическими свойствами.8. Состав по п. 1 или 2, в котором пластификатор содержит силикатную минеральную глину.9. Состав по п. 1 или 2, содержащий от 5 до 30% пластификатора по сухому весу состава.10. Состав по п. 1 или 2, в котором ...

Способ получения пористой спеченной магнезии, шихты для получения грубокерамического огнеупорного изделия с зернистым материалом из спеченной магнезии, изделия такого рода, а также способы их получения, футеровки промышленной печи и промышленная печь

ИЗДЕЛИЯ НА ОСНОВЕ ОКСИДА КРЕМНИЯ

... 1. Фигурное изделие из оксида кремния в чистом виде или с соответствующей добавкой, полученное формованием при комнатной температуре следующим способом: приготавливают золь, используя в качестве исходного вещества алкоксид кремния или алкоксид кремния по меньшей мере с одним предшественником по меньшей мере одной добавки, полученный золь гидролизуют, - добавляют коллоидный кремнезем, полученную смесь заливают в требуемую форму, получают из золя гель и быстро удаляют твердый продукт, высушивают гель, уплотняют гель путем термической обработки при температуре от 900 до 1500°С. 2. Изделие по п.1, используемое в качестве заготовки для вытягивания оптических волокон. 3. Изделие по п.2, характеризующееся формой поперечного сечения, выбранной из форм, изображенных на фиг.1. 4. Изделие по п.2, характеризующееся формой, выбранной из форм, изображенных на фиг.2.

Keramikähnlicher, teilpyrolysierter Verbundwerkstoff und Verfahren zu seiner Herstellung

Verfahren zur Herstellung poröser anorganischer Formkörper sowie damit hergestellte Formkörper und deren Verwendung

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung poröser anorganischer Formkörper, in welchem zunächst ein aufgeschäumter Schlicker hergestellt wird, anschließend der aufgeschäumte Schlicker in eine Gussform gegeben und darin durch eine Wärmebehandlung vorgehärtet wird, um einen Schaum-Grünkörper herzustellen, und schließlich der Schaumgrünkörper gesintert wird, wodurch ein poröser anorganischer Formkörper erhalten wird. Der aufgeschäumte Schlicker enthält keramische Pulverpartikel, mindestens einen assoziativen Verdicker, mindestens einen Schaumstabilisator und Wasser, wobei zu dessen Herstellung die keramischen Pulverpartikel, der assoziative Verdicker und der Schaumstabilisator gleichzeitig oder nacheinander in beliebiger Reihenfolge in das Wasser eingebracht werden. Zudem wird die wässrige Mischung nach dem Einbringen von einer, von zwei oder von allen drei der genannten Komponenten mechanisch aufgeschäumt wird. Der assoziative Verdicker wird hierbei bereits vor dem ...

Method of improving purity of ceramic components made from polycrystalline metal oxides, adds organic or inorganic substances before sintering

Organic or inorganic substances are added to the pressed or injection-molded component prior to sintering. The addition is made to the ceramic powder used, to the raw feedstock or to spray-dried granules. During the processes which follow, the addition purifies the material of undesired associated substances. One of the subsequent processes is a thermal treatment. This is controlled such that the impurity is transported to the surface. In the green (unfired) molding, during removal of binder using solvent, the impurity is transported to the surface and is then carried away in solvent. After the sintering process the contaminated surface skin is removed mechanically or chemically. The polycrystalline metal oxide is an aluminum oxide, a zirconium oxide or a mixture of them. An independent claim IS INCLUDED FOR the component so manufactured.

Verbundwerkstoffe für Gleitzwecke, Verfahren für ihre Herstellung und Verwendung

Oxidation catalyst

An oxidation catalyst comprises an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface; (iii) at least one metal is present throughout the extruded solid body and in a higher concentration at a surface; (iv) at least one metal is present throughout the extruded solid body and in a coating layer(s) on a surface; or (v) a combination of (ii) and (iii).

Porous, low density nanoclay composite

Disclosed are porous, low density nanoclay composites that exhibit highly homogeneous microcellular morphology and methods for forming the nanocomposites. The nanocomposites include a three-dimensional matrix having a non-lamellar, generally isotropic cellular structure with little or no macroscopic pores. The nanocomposites also include a gel that may be a noncovalently cross-linked, thermoreversible gel. The nanocomposites may include a binder and/or fibrous reinforcement materials. The nanocomposites may be formed according to a freeze-drying process in which ice crystal growth is controlled to prevent formation of macroscopic pores in the composite materials.

Filtering structure, including plugging material

Filter structure of the honeycomb type for filtering particulate-laden gases, said structure being characterized in that: a) the filtering walls of said honeycomb structure are made of a material having, after firing, an average thermal expansion coefficient, measured between 25 and 1100° C., of less than 2.5×10 −6 K −1 ; and b)the material constituting the plugs comprises: a filler formed from refractory grains, the melting temperature of which is above 1500° C., and the median diameter of which is between 5 and 50 microns; and a glassy binder phase.

Structured Layers Composed of Crosslinked or Crosslinkable Metal-Organic Compounds, Shaped Bodies Containing Them as well as Processes for Producing Them

The invention relates to a process for producing a structured shaped body or a layer of this type from a precursor of a metal oxide or mixed oxide selected from among magnesium, strontium, barium, aluminum, gallium, indium, silicon, tin, lead and the transition metals.

Silicon carbide ceramic and honeycomb structure

Provided is a silicon carbide ceramic having a small amount of resistivity change due to temperature change and being capable of generating heat by current application; and containing silicon carbide crystals having 0.1 to 25 mass % of 4H—SiC silicon carbide crystals and 50 to 99.9 mass % of 6H—SiC silicon carbide crystals, preferably having a nitrogen content of 0.01 mass % or less, more preferably containing two or more kinds of silicon carbide particles containing silicon carbide crystals and silicon for binding these silicon carbide particles to each other and having a silicon content of from 10 to 40 mass %.

Method and apparatus for sintering flat ceramics

A method and apparatus for sintering flat ceramics using a mesh or lattice is described herein.

Porous bone substitutes and method of preparing the same

A method of preparing a porous bone substitute is provided. The method includes preparing a ceramic paste including calcium phosphate-based ceramics, preparing a molded article formed of the ceramic paste based on a 3D rapid prototyping method, drying the molded article, and sintering the dried molded article.

METHOD OF MANUFACTURING COMPOSITE MATERIAL SHAPED ARTICLE CONTAINING ACICULAR HYDROXYAPATITE, AND COMPOSITE MATERIAL SHAPED ARTICLE

A manufacturing method is a method of manufacturing a composite material molded article containing acicular hydroxyapatite. This manufacturing method comprises: a preparation step of mixing at least a calcium phosphate compound including α-tricalcium phosphate, a calcium compound containing no phosphorus, cellulose nanofibers, and an aqueous solvent consisting of water and/or a hydrophilic solvent to obtain a mixture; a molding step of forming a molded article by using the mixture; a drying step of drying the molded article; and a synthesis step of performing synthesis treatment of the molded article after drying. 1. A method of manufacturing a composite material molded article containing acicular hydroxyapatite , comprising:a preparation step of mixing at least a calcium phosphate compound including α-tricalcium phosphate, a calcium compound containing no phosphorus, cellulose nanofibers, and an aqueous solvent consisting of water and/or a hydrophilic solvent to obtain a mixture;a molding step of forming a molded article using the mixture;a drying step of drying the molded article; anda synthesis step of subjecting the molded article after drying to synthesis treatment.2. The method of manufacturing a composite material molded article containing acicular hydroxyapatite according to claim 1 , wherein in the preparation step claim 1 , the calcium compound is added so that a Ca/P ratio of the mixture is more than 1.50 and 1.80 or less.3. The method of manufacturing a composite material molded article containing acicular hydroxyapatite according to claim 1 , wherein in the preparation step claim 1 , the cellulose nanofibers are added at 10 to 40 parts by mass with respect to 100 parts by mass of the calcium phosphate compound.4. The method of manufacturing a composite material molded article containing acicular hydroxyapatite according to claim 1 , comprising claim 1 , before the molding step:a removal step of removing part or all of the aqueous solvent from the ...

Method of manufacturing micronized sandstone obtained from ceramics or industrial wastes of ceramic manufacturing containing TiO2 bio-additive, and product thereof

The present invention discloses a method of manufacturing micronized sandstone obtained from ceramics or industrial wastes of ceramic manufacturing, such as white paste, natural stones or clinker, including TiOas bio-additive, and product obtained by the micronized sandstone thereof. The ceramics and industrial wastes of ceramic are grinded in several steps and the resultant powders are collected by means of individual filters and further combined in a nanopowder micronizer for posterior treatment, where TiOhydrolyzed can be optionally added. This micronized sandstone comprising the bio-additive TiOis used in the production of plasters, mortars, grouts and/or as additive for paints and/or epoxy enriched with TiO. The micronized sandstone bio-additive with TiOcan be additionally subjected to two optional embodiments of the invention: treatment with or without the use of a pigment. In order to obtain the final product that can be used in the production of blocks, floors and other products of various sizes, an agglomerating agent combined with TiOis added to the micronized sandstone comprising the bio-additive TiO, either in an aqueous solution or as a dry product, optionally including colored oxides. 1. Method of manufacturing micronized sandstone obtained from ceramics or industrial waste of ceramics manufacturing containing TiObio-additive , characterized by comprising the steps of:{'b': 1', '2', '3, 'a. grinding the ceramics or ceramic waste in several mills/grinders (, , ),'}{'b': '4', 'b. obtaining the micronized sandstone () by passing the grinded ceramic material into a micronizer,'}{'b': 5', '4, 'c. adding pigments or colored oxides () to the micronized powder thereof (),'}{'b': 5', '5, 'sub': '2', 'i': 'b', 'd. processing the micronized colored powder () with a hydrolyzed solution of TiO(),'}{'b': 1', '1, 'sub': '2', 'e. drying (S) the micronized colored sandstone comprising TiOadditive (P)'}{'b': '1', 'sub': '2', 'f. mixing the obtained product (P) with an ...

Porous articles, methods, and apparatuses for forming same

A mold for forming a porous article can include a first material having a first thermal conductivity and a second material having a second thermal conductivity different from the first thermal conductivity. The first material may be at least partially embedded within the second material and configured to create regions of different thermal conductivity in the body, such as configured to create distinct nucleation regions within a material formed within the mold. A method for forming a porous article can include providing a slurry within a mold and freeze-casting the slurry to form a porous article having a burst-like distribution of porosity. A porous article according to embodiments herein can include a burst-like distribution of porosity.

PRODUCTION OF LEAD-FREE PIEZOCERAMICS IN AQUEOUS SURROUNDINGS

The invention relates to a method for producing ceramics having piezoelectric properties in predominantly aqueous suspending agents. 1. A method for producing a ceramic having piezoelectric properties , wherein predominantly aqueous suspending agents are used.2. The method for producing a ceramic having piezoelectric properties according to claim 1 , wherein claim 1 , in a first method step claim 1 , the raw materials are mixed in predominantly aqueous suspending agents and are milled claim 1 , wherein a suspension having isotropic distribution is created.3. The method for producing a ceramic having piezoelectric properties according to claim 2 , wherein the isotropic distribution of the suspension is fixed in the subsequent method step.4. The method for producing a ceramic having piezoelectric properties according to claim 3 , wherein the fixing of the isotropic distribution takes place by freezing of the suspension.5. The method for producing a ceramic having piezoelectric properties according to claim 4 , wherein the freezing takes place in a liquid claim 4 , solid or gaseous freezing medium.6. The method for producing a ceramic having piezoelectric properties according to claim 5 , wherein the temperature of the freezing medium is below the melting temperature of the suspension claim 5 , and preferably far below the melting temperature.7. The method for producing a ceramic having piezoelectric properties according to claim 6 , wherein the suspension is flash-frozen.8. The method for producing a ceramic having piezoelectric properties according to claim 5 , wherein the freezing medium is selected from the group consisting of liquid or gaseous nitrogen claim 5 , liquid or gaseous air claim 5 , liquid or gaseous oxygen claim 5 , or other liquid or gaseous organic or inorganic media.9. The method for producing a ceramic having piezoelectric properties according to claim 4 , wherein the freezing takes place by way of injection into a freezing medium claim 4 , whereby ...

Baking slurry composition, green sheet, method for manufacturing green sheet, method for manufacturing sintered product, and method for manufacturing monolithic ceramic capacitor

A baking slurry composition for producing a green sheet of the present invention contains inorganic powder, a polyvinyl alcohol resin, acrylic polymer, and water. The acrylic polymer has a glass transition temperature higher than or equal to −50° C. and lower than or equal to 30° C. and an acid value greater than or equal to 50 mg KOH/g and less than or equal to 200 mg KOH/g. The acrylic polymer has a weight percentage of more than or equal to 0.1 and less than or equal to 5.0 relative to a total solid content of the baking slurry composition.

Preparation of samples for XRF using flux and platinum crucible

A method of of preparing samples for XRF using a flux and a platinum crucible includes forming the flux into a free-standing crucible liner. This may be achieved by mixing lithium borate particles with a liquid to form a paste; placing the lithium borate paste onto the inner surface of a mould; and after drying removing from the mould and firing the lithium borate paste to dry the lithium borate to form a free-standing crucible liner. The liner may be placed within a platinum crucible and then a sample placed in the liner. The temperature of the crucible is raised to a sufficient temperature that any oxidation reaction takes place before taking the temperature above the melting temperature of the flux to melt the crucible liner and dissolve the sample into the flux. The crucible can then be cooled and XRF measurements made on the sample.

ALUMINUM NITRIDE PARTICLES

Aluminum nitride particles used as a material of an aluminum nitride sintered compact are disclosed. The aluminum nitride particles may have a same crystal orientation. The aluminum nitride particles each have an aspect ratio of 3 or more, a plate-like shape, a planar length of 0.6 μm or more and 20 μm or less, and a thickness length of 0.05 μm or more and 2 μm or less. 1. Aluminum nitride particles used as a material of an aluminum nitride sintered compact , whereinthe aluminum nitride particles have a same crystal orientation, andthe aluminum nitride particles each have an aspect ratio of 3 or more; a plate-like shape; a planar length of 0.6 μm or more and 20 μm or less; and a thickness length of 0.05 μm or more and 2 μm or less.2. The aluminum nitride particles according to claim 1 , wherein a surface area is 0.4 m/g or more and 16 m/g or less.3. The aluminum nitride particles according to claim 2 , wherein a metal impurity concentration in the particles is 0.2 mass % or less.4. The aluminum nitride particle according to claim 3 , wherein an oxygen concentration in the particles is 2 mass % or less.5. The aluminum nitride particles according to claim 1 , wherein a metal impurity concentration in the particles is 0.2 mass % or less.6. The aluminum nitride particle according to claim 1 , wherein an oxygen concentration in the particles is 2 mass % or less.7. The aluminum nitride particle according to claim 2 , wherein an oxygen concentration in the particles is 2 mass % or less.8. The aluminum nitride particle according to claim 5 , wherein an oxygen concentration in the particles is 2 mass % or less. The disclosure herein discloses art related to aluminum nitride particles. Especially, the disclosure herein discloses art related to aluminum nitride particles used as a material of an aluminum nitride sintered compact.Aluminum nitride particles having a high aspect ratio (planar length L/thickness length D) are described in International Publication No. WO2014/ ...

Ceramic foam

The invention relates to a method for preparing a ceramic material, in particular porcelain, having a porous, foam-like structure, comprising the steps of providing a clay composition comprising kaolin clay; alkali metal salt and/or alkaline earth metal salt, or a mixture thereof; a plastic mineral clay; and a frit; and water; shaping said composition in a mould; drying said composition in said mould by subjecting it to temperatures below 140° C.; firing said composition in said mould by subjecting it to temperatures within the range of 700-1200° C. The invention also pertains to objects made of this foamed ceramic material.

Cellulose nanocrystal-modified ceramic blank and preparation method thereof

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

Method and apparatus for pyrolyzing an electrode

An electrode heat treatment device and associated method for fabricating an electrode are described, and include forming a workpiece, including coating a current collector with a slurry. The workpiece is placed on a first spool, and the first spool including the workpiece is placed in a sealable chamber, wherein the sealable chamber includes the first spool, a heat exchange work space, and a second spool. An inert environment is created in the sealable chamber. The workpiece is subjected to a multi-step continuous heat treatment operation in the inert environment, wherein the multi-step continuous heat treatment operation includes continuously transferring the workpiece through the heat exchange work space between the first spool and the second spool and controlling the heat exchange work space to an elevated temperature.

Polycrystalline dielectric thin film and capacitor element

A polycrystalline dielectric thin film and capacitor element has a small dielectric loss tan δ. The polycrystalline dielectric thin film, in which the main composition is a perovskite oxynitride. The perovskite oxynitride is expressed by the compositional formula AaBbOoNn (a+b+o+n=5), where a/b>1 and n≥0.7.

FILAMENTOUS ORGANISM-DERIVED CARBON-BASED MATERIALS, AND METHODS OF MAKING AND USING SAME

The invention provides filamentous organism-derived carbonaceous materials doped with organic and/or inorganic compounds, and methods of making the same. In certain embodiments, these carbonaceous materials are used as electrodes in solid state batteries and/or lithium-ion batteries. In another aspect, these carbonaceous materials are used as a catalyst, catalyst support, adsorbent, filter and/or other carbon-based material or adsorbent. In yet another aspect, the invention provides battery devices incorporating the carbonaceous electrode materials. 138-. (canceled)39. A method of producing a carbonaceous material , the method comprising:carbonizing a dried organic material comprising a filamentous organism to provide a carbonaceous material that is a graphitic, partially graphitic, or an amorphous carbon matrix.40. The method of claim 39 , wherein the dried organic material is shaped or pressed claim 39 , wherein optionally the shaped or pressed dried organic material is contacted with a conductive wire before carbonization.41. The method of claim 39 , wherein the dried organic material comprises a binding material or is in powder form.42. The method of claim 39 , further comprising low-heat drying claim 39 , flash freezing claim 39 , lyophilizing claim 39 , or flash freezing and lyophilizing claim 39 , the filamentous organism to form the dried organic material.43. The method of claim 42 , wherein the filamentous organism is grown in a medium under light and optionally in the presence of at least one organic or inorganic compound.44. The method of claim 39 , wherein the filamentous organism is at least one selected from the group consisting of a filamentous algae claim 39 , filamentous fungus claim 39 , and filamentous bacterium.45Neurospora crassa.. The method of claim 39 , wherein the filamentous organism is a wild type or genetically modified46. The method of claim 43 , wherein at least one applies:(a) the filamentous organism is grown for a period of time of ...

CORROSION-RESISTANT MEMBER

A corrosion-resistant member according to the present disclosure includes a substrate that is composed of an aluminum-oxide-based ceramic and a covering layer that is composed of an O—Al—C layer that is located on the substrate. 1. A corrosion-resistant member , comprising:a substrate that is composed of an aluminum-oxide-based ceramic; anda covering layer that is composed of an O—Al—C layer that is located on the substrate.2. The corrosion-resistance member according to claim 1 , wherein an element concentration of carbon on a surface of the covering layer is 25 atomic % or greater and 55 atomic % or less.3. The corrosion-resistance member according to claim 1 , wherein a thickness of the covering layer is 10 nm or greater and 100 nm or less.4. The corrosion-resistance member according to claim 1 , wherein a ratio A/B of the covering layer is 5 or greater in a case where A is an element concentration of carbon on a surface of the covering layer and B is an element concentration of carbon at a depth of 6 nm from the surface toward a side of the substrate.5. The corrosion-resistance member according to claim 1 , wherein a ratio B/C of the covering layer is 2 or less in a case where B is an element concentration of carbon at a depth of 6 nm from a surface of the covering layer toward a side of the substrate and C is an element concentration of carbon at a depth of 10 nm from the surface toward a side of the substrate. This application is a national stage application of International Application No. PCT/JP2018/006736 filed on Feb. 23, 2018, which designates the United States, the entire contents of which are herein incorporated by reference, and which is based upon and claims the benefit of priority to Japanese Patent Application No. 2017-035008 filed on Feb. 27, 2017, the entire contents of which are herein incorporated by reference.The present disclosure relates to a corrosion-resistant member.Demand of a liquid-for-beverage supply apparatus such as a vending machine ...

AIR-HEATING TYPE HEAT NOT BURN HEATING DEVICE, CERAMIC HEATING ELEMENT AND PREPARATION METHOD THEREOF

An air-heating type heat not burn heating device, a ceramic heating element and a preparation method thereof are provided. The ceramic heating element includes a honeycomb ceramic body and a heating printed circuit. Porous channels are arranged in the honeycomb ceramic body, and the porous channels are circular holes or polygonal holes. The heating printed circuit is arranged around an outer surface of the honeycomb ceramic body to heat the air passing through the porous channels. According to the ceramic heating element, the surface made of high purity alumina honeycomb ceramic has high compactness, it is able to effectively prevent absorption of smoke dust particles, thus to effectively preventing odd smell; the high-purity alumina honeycomb ceramic has good thermal conductivity, with a thermal conductivity of 33 W/mk; the wall thickness and pore diameter in the honeycomb ceramic structure are both very small, and the thermal conductivity is extremely excellent. 1. A ceramic heating element , comprising:a honeycomb ceramic body, wherein porous channels are arranged in the honeycomb ceramic body, and the porous channels are circular holes or polygonal holes; anda heating printed circuit, wherein the heating printed circuit is arranged around an outer surface of the honeycomb ceramic body to heat air passing through the porous channels.2. The ceramic heating element of claim 1 , wherein the alumina ceramic tube body is an alumina honeycomb ceramic body claim 1 , and the alumina honeycomb ceramic body has a density being larger than or equal to 3.86 g/cm.3. The ceramic heating element of claim 1 , wherein the porous channels are uniformly distributed in the honeycomb ceramic body.4. The ceramic heating element of claim 1 , wherein the porous channels are arranged in a center of the honeycomb ceramic body.5. An air-heating type heat not burn heating device claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', '#text': 'claim 1'}, '#text': 'the ceramic heating ...

Ceramic Material, Varistor, and Method for Producing the Ceramic Material and the Varistor

In an embodiment a ceramic material includes ZnO as main constituent, Y as a first additive, second additives including at least one compound containing a metal element, wherein the metal element is selected from the group consisting of Bi, Cr, Co, Mn, Ni and Sb, Si as a first dopant and second dopants having at least one compound containing a metal cation from Al, B, or Ba, wherein a corresponds to a molar proportion of Bi calculated as BiO, b corresponds to a molar proportion of Y calculated as YO, c corresponds to a molar proportion of Al calculated as AlO, d corresponds to a molar proportion of Ba calculated as BaO, e corresponds to a molar proportion of B calculated as BO, f corresponds to a molar proportion of Si calculated as SiO, g corresponds to a molar proportion of Ni calculated as NiO, h corresponds to a molar proportion of Co calculated as CoO, i corresponds to a molar proportion of Cr calculated as CrO, j corresponds to a molar proportion of Sb calculated as SbO, and k corresponds to a molar proportion of Mn calculated as MnO. 115-. (canceled)16. A ceramic material comprising:ZnO as main constituent;Y as a first additive;second additives comprising at least one compound containing a metal element, wherein the metal element is selected from the group consisting of Bi, Cr, Co, Mn, Ni and Sb;{'sup': '4+', 'Si as a first dopant; and'}{'sup': 3+', '3+', '2+, 'second dopants comprising at least one compound containing a metal cation from Al, B, or Ba,'}{'sub': 2', '3', '2', '3', '2', '3', '2', '3', '2', '3', '4', '2', '3', '2', '3', '3', '4, 'wherein a corresponds to a molar proportion of Bi calculated as BiO, b corresponds to a molar proportion of Y calculated as YO, c corresponds to a molar proportion of Al calculated as AlO, d corresponds to a molar proportion of Ba calculated as BaO, e corresponds to a molar proportion of B calculated as BO, f corresponds to a molar proportion of Si calculated as SiO, g corresponds to a molar proportion of Ni calculated ...

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 ...

System and Method for Ceramic Doping of Carbon Fiber Composite Structures

A system and method for ceramic doping of carbon fiber materials is disclosed. A carbon fiber preform may be made of carbonized oxidized PAN fibers and may be placed in contact with a nanoparticle suspension having nanoparticles and a dispersion medium. The nanoparticles may impregnate the carbon fiber preform, causing it to become a doped carbon fiber preform. The doped carbon fiber preform may be densified. The doped carbon fiber preform may be densified by conventional CVI processing techniques. The doped carbon fiber preform may be densified by thermal gradient CVI. 1. A doped carbon fiber preform comprising:a carbon fiber preform comprising carbonized oxidized PAN fibers; andnanoparticles impregnated into the carbonized oxidized PAN fibers.2. The doped carbon fiber preform according to claim 1 , wherein the nanoparticles comprise aluminum oxide.3. The doped carbon fiber preform according to claim 2 , wherein the doped carbon fiber preform comprises an aircraft brake disc. This application is a divisional of, claims priority to and the benefit of, U.S. patent application Ser. No. 14/527,457 filed on Oct. 29, 2014 and entitled “SYSTEM AND METHOD FOR CERAMIC DOPING OF CARBON FIBER COMPOSITE STRUCTURES”, which is hereby incorporated by reference in its entirety.The present disclosure relates to the field of composite structures, and more specifically, to ceramic doping of composite structures, such as carbon fiber composite structures.Carbon fiber parts, such as carbon/carbon parts (“C/C”) in the form of friction disks are commonly used for aircraft brake disks and, particularly in automotive racing brake and clutch disks. Carbon/carbon brake disks are especially useful in these applications because of the high temperature characteristics of C/C material. However, limitations of traditional C/C material include the limited wear life of the C/C material, the tendency to oxidize at high temperatures, and the significant manufacturing time required.A method of ...

ALN Substrate And Method For Producing Same

An AlN substrate with excellent heat transfer efficiency between it and another member to be bonded to a bonding surface of the AlN substrate. The AlN substrate is composed of an AlN sintered body containing group 2A and 3A elements, and the surface roughness Ra of the bonding surface is 3 nm or less, and, in voids having long diameters of 0.25 μm or more, the mean value is 1.5 μm or less, and the maximum value is 1.8 μm or less. A method for producing the AlN substrate includes sintering a precursor formed of a sintering material that contains 88.7 to 98.5 mass % with respect to AlN, 0.01 to 0.3 mass % with respect to a group 2A element in oxide equivalent, and 0.05 to 5 mass % with respect to a group 3A element in oxide equivalent to form a sintered body, and applying HIP treatment onto the sintered body.

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 ...

PROCESS FOR PRODUCING ZIRCONIA-BASED MULTI-PHASIC CERAMIC COMPOSITES

A process is described, for producing zirconia-based multi-phasic ceramic composite materials, comprising the steps of: providing at least one ceramic suspension by dispersing at least one ceramic zirconia powder in at least one aqueous medium to obtain at least one matrix for such composite material; providing at least one aqueous solution containing one or more inorganic precursors and adding such aqueous solution to such ceramic suspension to surface modify such ceramic zirconia powder and obtain at least one additived suspension; quickly drying such additived suspension to obtain at least one additived powder; heat treating such additived powder to obtain at least one zirconia powder coated on its surface by second phases; and forming such zirconia powder coated on its surface by second phases. 1. A process for producing a zirconia-based multi-phasic ceramic composite material , the process comprising the steps of:a) providing at least one ceramic suspension by dispersing at least one ceramic zirconia powder in at least one aqueous medium to obtain at least one ceramic suspension;b) providing at least one aqueous solution containing one or more inorganic precursors and adding the aqueous solution to the ceramic suspension to surface modify the ceramic zirconia powder, thereby forming a surface modified ceramic zirconia powder;c) drying the surface modified ceramic zirconia powder to obtain an additive powder, through nebulization of the surface modified ceramic zirconia powder to an aerosol of micro-drops at a temperature between 80° C. and 200° C.; andd) heat treating the additive powder to obtain at least one zirconia powder coated on its surface by second phases;thereby producing the zirconia-based multi-phasic ceramic composite material.2. The process according to claim 1 , wherein the ceramic zirconia powder is stabilized by an oxide claim 1 , the oxide comprising cerium oxide or yttrium oxide.3. The process according to claim 2 , wherein the molar ratio of ...

PERSONALIZED INVESTMENT PORTFOLIO

A method for establishing a personalized investment portfolio comprising the steps of starting from a client's investor behavior and experience establishing a client profile based on questions regarding the client's behavior of daily life and investment approach and experience to provide a behavioral profile; constructing a computer program model to determine optimal asset class allocation for each client profile covering a wide range of assets, including real estate, insurance, arts and traditional financial asset classes as a holistic asset allocation; and establishing a model of a personalized ranking of financial investment products for a client investor, based on product characteristics and investor profile with a best fit investment program. 1. A method for determining a behavioral profile of a potential financial investor's personal preferences and degree of risk aversion for use in appropriately and personally acceptably strategizing investment opportunities , comprising the steps of:{'claim-text': ['a. question choices have been predetermined to be indicative of characteristics of personal preferences based on a probability scale,', 'b. question choices are selected and couched to be non-invasive, inoffensive and discrete to avoid skewed deliberate choices,', 'c. some question choices relate to aspects of investment strategies with different answers having been predetermined as being indicative of personal preference choices and degree of risk aversion;'], '#text': 'a. crafting a questionnaire with multiple choice questions concerning personal choices and opinions regarding common daily life matters and social interactions, wherein:'}b. having the potential financial investor provide answers to the questionnaire; andc. recording and evaluating the questionnaire answers with a scoring matrix and an algorithm which provides predetermined results of a behavioral profile of the potential investor based on a probability analysis based on previously determined ...

Friable-resistant dielectric porcelain

The present invention relates to a composition for forming a friable-resistant dielectric porcelain material. The present invention also relates to a friable-resistant dielectric porcelain material formed from the composition of the present invention, a method of making a friable-resistant dielectric porcelain material, a friable-resistant dielectric porcelain material formed by the method of the present invention, a dielectric porcelain material comprising a particular composition, and a system for producing ozone using the dielectric porcelain material of to the present invention.

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.

Method for Producing a Metal-Ceramic Substrate with at Least One Via

A method for producing a metal-ceramic substrate with at least one electrically conductive via, in which one metal layer, respectively, is attached in a planar manner to a ceramic plate or a ceramic layer to each of two opposing surface sides of the ceramic layer is provided. The method includes introducing a metal-containing, powdery and/or liquid substance into a hole in the ceramic layer delimiting the via prior to the attachment of both metal layers, or subsequent to the attachment of one of the two metal layers to form an assembly. Prior to the attachment of the other one of the two metal layers, and the assembly is subjected to a high-temperature step above 500° C. in which the metal-containing substance wets the ceramic layer at least partially with a wetting angle of less than 90°.

THERMOELECTRIC CONVERSION MATERIAL, THERMOELECTRIC CONVERSION ELEMENT AND THERMOELECTRIC CONVERSION MODULE

There is provided a thermoelectric conversion material which is characterized by being composed of a sintered body of plate-like crystals of a composite oxide represented by general formula (2) BiCaMCoMO, and by having a density of 4.0-5.1 g/cm. This thermoelectric conversion material is also characterized in that: when observed by SEM, the ratio of the plate-like crystals of a composite oxide represented by general formula (2) having an inclination in the major axis direction within 0±20° relative to the surface of the thermoelectric conversion material is 60% or more on the number basis; the average length of the lengths of the plate-like crystals of a composite oxide represented by general formula (2) is 20 μm or more; and the aspect ratio of the plate-like crystals of a composite oxide represented by general formula (2) is 20 or more. 1. A thermoelectric conversion material , wherein {'br': None, 'sub': f', 'g', 'h', 'i', 'j', 'k, 'sup': 3', '4, 'BiCaMCoMO\u2003\u2003(2)'}, 'the thermoelectric conversion material is a sintered product of a plate crystal of a composite oxide represented by the following general formula (2){'sup': 3', '4, 'wherein Mrepresents one or more elements selected from the group consisting of Na, K, Li, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Sr, Ba, Al, Y and lanthanoid, and Mrepresents one or more elements selected from the group consisting of Ti, V, Cr, Mn, Fe, Ni, Cu, Mo, W, Nb and Ta; f satisfies 0 Подробнее

COMPOSITE MATERIAL BASED ON C/SIC FIBERS WITH ULTRA REFRACTORY, HIGH TENACITY AND ABLATION RESISTANT MATRIX

The present invention relates to a process for the production of fiber-reinforced composite materials with an ultra-refractory, high tenacity, high ablation resistant matrix with self-healing properties, prepared from highly sinterable slurries. The composite material is produced using techniques of infiltration and drying at ambient pressure or under vacuum, and consolidated by sintering with or without the application of gas or mechanical pressure. 1. A process for the preparation of an ultra-refractory composite ceramic material comprising:(i) preparing at least one preform comprising fibers selected from among carbon fibers, silicon carbide fibers and mixtures thereof;(ii) infiltrating the at least one preform with a ceramic suspension comprising: [{'sub': 2', '2', '2, '≥70 vol. % of an ultra-refractory ceramic component selected from among ZrB, HfB, TaB, ZrC, HfC, TaC and mixtures thereof;'}, {'sub': 2', '3', '4, '≤10 vol. %, of a sintering aid selected from among ZrSi, SiNand mixtures thereof; and'}, '≤20 vol. %, of a Si compound selected from SiC, at least one organic precursor of SiC and mixtures thereof; and, '(a) a mixture of ceramic phases comprising(b) a dispersing medium selected from water, at least one organic solvent and mixtures thereof, thereby obtaining a composite material;{'sup': '5', '(iii) drying the composite material at a pressure less than or equal to about 1×10Pa; and'}(iv) consolidating the dried composite material at a temperature comprised in the range of 1700°−2000° C.2. The process according to claim 1 , wherein the fibers are carbon fibers.3. The process according to claim 1 , wherein the fibers are present in the ultra-refractory composite ceramic material in an amount comprised in the range of 30-70 vol. %.4. The process according to claim 1 , wherein the mixture of ceramic phases comprises ZrB.5. The process according to claim 1 , wherein the ultra-refractory ceramic component of step (ii) is a powder having a particle size ≤5 μm. ...

SYSTEMS FOR AND METHODS OF DRYING THE SKIN OF A CELLULAR CERAMIC WARE

Systems for and methods of drying a wet skin of a wet skinned ceramic ware are disclosed. The wet skinned ceramic ware includes a dry interior web with an outer surface. The wet skin is disposed on the outer surface of the dry interior web. The method includes generating an airstream and then directing the airstream through a first end of the wet-skinned ceramic ware only through an annular portion of the interior web that is adjacent the outer surface of the interior web. The flow of the airstream through the annular portion of the interior web causes moisture in the wet skin to migrate inwardly toward the interior web. The moisture is removed from the annular portion of the interior web when the airstream exits a second end of the ceramic ware, thereby drying the skin from the inside out of the wet-skinned ceramic ware. 1. A method of drying an outer peripheral portion of a cellular ceramic ware , the ware comprising an interior web having walls that define a plurality of channels extending between first and second ends of the ware , the method comprising:preferentially directing a stream of gas into the interior web adjacent to the outer peripheral portion to preferentially dry an inner surface of the outer peripheral portion.2. The method according to claim 1 , wherein no gas is directed to the outer surface of the outer peripheral portion.3. The method according to claim 1 , wherein no gas is directed into at least one of the innermost channels of the interior web.4. The method according to claim 1 , wherein the gas is directed annularly into the interior web.5. The method according to claim 1 , wherein the preferential drying causes a liquid in the outer peripheral portion to migrate into one or more channels of the interior web.6. (canceled)7. The method according to claim 1 , wherein the outer peripheral portion comprises a ceramic or a glass.8. (canceled)9. A method of drying a wet skin disposed on an outer surface of a cellular ceramic ware having first ...

BORON CARBIDE SINTERED BODY AND ETCHER INCLUDING THE SAME

A boron carbide sintered body includes necked boron carbide-containing particles. The thermal conductivity of the boron carbide sintered body at 400° C. is 27 W/m·K or less and the ratio of the thermal conductivity of the boron carbide sintered body at 25° C. to that of the boron carbide sintered body at 800° C. is 1:0.2 to 1:3. 1. A boron carbide sintered body comprising necked boron carbide-containing particles wherein the thermal conductivity of the boron carbide sintered body at 400° C. is 27 W/m·K or less and the ratio of the thermal conductivity of the boron carbide sintered body at 25° C. to that of the boron carbide sintered body at 800° C. is 1:0.2 to 1:3.2. The boron carbide sintered body according to claim 1 , wherein the particles comprise a particle diameter (D) of 1.5 μm or less.3. The boron carbide sintered body according to claim 1 , wherein the boron carbide sintered body comprises a surface roughness (Ra) of 0.1 μm to 1.2 μm.4. The boron carbide sintered body according to claim 1 , wherein the boron carbide sintered body comprises a porosity of 3% or less.5. The boron carbide sintered body according to claim 1 , wherein the boron carbide sintered body comprises an average surface or cross-sectional pore diameter of 5 μm or less.6. The boron carbide sintered body according to claim 1 , wherein the area of pores comprising an average surface or cross-sectional diameter of 10 μm or more accounts for 5% or less of the area of all pores in the boron carbide sintered body.7. The boron carbide sintered body according to claim 1 , wherein the boron carbide sintered body does not form particles upon contact with fluorine ions or chlorine ions in a plasma etcher.8. The boron carbide sintered body according to claim 1 , wherein the etch rate of the boron carbide sintered body is 55% or less of that of silicon.9. The boron carbide sintered body according to claim 1 , wherein the etch rate of the boron carbide sintered body is 70% or less of that of CVD-SiC.10. ...

PROBE CARD BOARD, PROBE CARD, AND INSPECTION APPARATUS

A probe card board in the present disclosure includes a plurality of through holes designed to receive a probe brought into contact with a measurement object. The probe card board is composed of silicon nitride based ceramics. The probe card board includes a first surface opposed to the measurement object and a second surface located opposite to the first surface. The probe card board contains a plurality of crystal phases of metal silicide. Metal constituting the metal silicide is at least one kind selected from among molybdenum, chrome, iron, nickel, manganese, vanadium, niobium, tantalum, cobalt and tungsten. 1. A probe card board , comprising:a plurality of through holes designed to receive a probe brought into contact with a measurement object, whereinthe probe card board further comprises silicon nitride based ceramics, anda first surface opposed to the measurement object and a second surface located opposite to the first surface; andthe probe card board contains a plurality of crystal phases of metal silicide, andmetal constituting the metal silicide is at least one kind selected from among molybdenum, chrome, iron, nickel, manganese, vanadium, niobium, tantalum, cobalt and tungsten.2. The probe card board according to claim 1 , wherein a granular body composed of only metal constituting the metal silicide is not exposed onto the first surface.3. The probe card board according to claim 1 , wherein the first surface contains melilite whose content is 5 mass % or less.4. The probe card board according to claim 1 , wherein the first surface comprises void holes having a maximum length of 94 μm or less.5. The probe card board according to claim 1 , wherein the silicon nitride based ceramics contains at least 50 mass % or more of silicon nitride relative to 100 mass % of all ingredients constituting ceramics.6. The probe card board according to claim 1 , wherein kurtosis (Rku) of the first surface obtainable from a roughness curve is 2 to 16.7. The probe card ...

Magnetizable abrasive particle and method of making the same

Magnetizable abrasive particles are described comprising ceramic particles having outer surfaces comprising a coating of unsintered polyion and magnetic particles bonded to the polyion. In favored embodiments, the magnetic particles have a magnetic saturation of at least 10, 15, 20, 25, 30, 35, 40, 45 or 50 emu/gram. In another embodiment, an abrasive article is described comprising a plurality of magnetizable abrasive particles as described herein retained in a binder material. Also described are method of making magnetizable abrasive particles and methods of making an abrasive article comprising magnetizable abrasive particles.

Sinterable powder for making a dense slip casted pressureless sintered sic based ceramic product

A SiC based sinterable powder mixture comprising, by dried weight of said powder: a) a mineral content comprising—silicon carbide (SiC) particles, -mineral boron compound particles, the powder comprising at least 50% by weight of SiC and the total mineral content of the powder being at least 90% by weight, b) at least a water insoluble carbon-containing source, in particular a carbon containing resin, the powder comprising at least 1% by weight, and preferably less than 10% by weight,of said water insoluble carbon-containing source, wherein the average particle size of said sinterable powder is comprised between 0.5 to 2.0 micrometers.

MODIFIED NI-ZN FERRITES FOR RADIOFREQUENCY APPLICATIONS

Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Cosuch that the relaxation peak associated with the Cosubstitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band. 120-. (canceled)21. A material for radiofrequency applications , the material comprising:a single-phase modified Ni—Zn ferrite formed from a base Ni—Zn ferrite, the single-phase modified Ni—Zn ferrite including elements Ni, Zn, Co, Fe, and O, and having a spinel crystal structure and magnetic Q of greater than 100.22. The material of wherein the single-phase modified Ni—Zn ferrite has a composition NiCoZnFeO.23. The material of wherein the single-phase modified Ni—Zn ferrite has a permeability of 54.24. The material of wherein the base Ni—Zn ferrite has the formula NiZnFeO.25. The material of wherein the single-phase modified Ni—Zn ferrite is configured for use in the 13.56 MHz ISM band.26. The material of wherein the single-phase modified Ni—Zn ferrite is configured for use in the 27 MHz ISM band.27. The material of wherein the single-phase modified Ni—Zn ferrite further includes Mn.28. A radiofrequency device selected from the group consisting of radio-frequency identification tags claim 21 , biomedical sensors claim 21 , and radiofrequency antennas including the radiofrequency material of .29. A radiofrequency antenna claim 21 , the antenna being formed from a nickel zinc ferrite comprising:a single-phase modified Ni—Zn ferrite, the single-phase modified Ni—Zn ...

Ceramic composition and method of making the composition

A method of making a ceramic composite comprises forming a wet ceramic composition comprising a plurality of discrete ceramic components and a fluxing agent dissolved in a solvent. At least a portion of the solvent is removed from the wet ceramic composition to form a dried ceramic composition comprising the plurality of discrete ceramic components coated with the fluxing agent. The dried ceramic composition is sintered to form the ceramic composite, the sintering being carried out at a sinter temperature sufficient to fuse the discrete ceramic components at bridging sites formed where two or more of the discrete ceramic components coated with fluxing agent are in physical contact.

LOW MELTING POINT POTASSIUM ALUMINUM FLUORIDE FLUX AGENT

The present disclosure provides a potassium aluminum fluoride (KAlF) flux agent having improved properties such as a lower melting point which allows for the use of solders and alloys with lower melting points. The potassium aluminum fluoride (KAlF) flux agent may also allow for faster brazing of standard alloys. 1. A KAlFflux agent comprising:a K:Al ratio between 1.3:1 and 1.5:1;a K:F ratio between 1.3:4 and 1.5:4; anda melting point between 530° C. and about 550° C.2. The flux agent of claim 1 , wherein the flux agent has a phase composition of KAlFbetween about 5 wt. % and about 60 wt. % and of KAlF(HO) between 40 wt. % and 95 wt. % claim 1 , based on the total composition of the KAlFand KAlF(HO) phases in the flux agent.3. The flux agent of claim 2 , wherein the flux agent has a phase composition of KAlFbetween about 15 wt. % and about 50 wt. % and of KAlF(HO) between 50 wt. % and 85 wt. % claim 2 , based on the total composition of the KAlFand KAlF(HO) phases in the flux agent.4. The flux agent of claim 1 , wherein the flux agent has a melting point between 535° C. and 545° C.5. The flux agent of claim 1 , wherein the Al:F ratio is 1:4.6. A KAlFflux agent claim 1 , comprising:a K:Al ratio between 1.3:1 and 1.5:1;a K:F ratio between 1.3:4 and 1.5:4;a Al:F ratio of 1:4; and{'sub': 4', '2', '5', '2', '4', '2', '5', '2, 'a phase composition of KAlFbetween about 5 wt. % and about 60 wt. % and of KAlF(HO) between 40 wt. % and 95 wt. %, based on the total composition of the KAlFand KAlF(HO) phases in the flux agent.'}7. The flux agent of claim 6 , wherein the flux agent has a phase composition of KAlFbetween about 15 wt. % and about 50 wt. % and of KAlF(HO) between 50 wt. % and 85; wt. % claim 6 , based on the total composition of the KAlFand KAlF(HO) phases in the flux agent.8. The flux agent of claim 7 , wherein the flux agent has a melting point between 535° C. and 545° C.9. The flux agent of claim 8 , wherein the melting point is about 540° C.10. A method of ...

Bonded zirconia refractories and methods for making the same

Disclosed herein are methods for making a bonded refractory material, the methods comprising preparing a slurry comprising glass precursor particles having an average particle size ranging from about 1 nm to about 200 nm; combining zirconia particles with the slurry to form a batch composition comprising at least about 80% by weight of zirconia; forming a green body from the batch composition; and sintering the green body to form a sintered refractory material. Sintered high-zirconia refractory materials can comprise at least about 80% by weight of zirconia having an average grain size of 100 microns or less, wherein the zirconia is interspersed in a glassy phase, and wherein the sintered refractory materials comprise about 15% or less by weight of the glassy phase. Melting vessels having at least one interior surface comprising such sintered zirconia refractory materials are further disclosed herein.

POLYCRYSTALLINE DIAMOND CUTTERS AND LIQUID SEDIMENTATION - HPHT METHOD OF MAKING THEREOF

Polycrystalline diamond cutters and methods of making thereof are described. The cutters include a substrate and a diamond body. The diamond body includes diamond particles spatially arranged according to a gradient of particle sizes. The methods include steps of suspending diamond particles in a liquid and allowing their sedimentation according to a gradient of particle sizes resulting in regions spatially arranged axially and/or radially in which a majority of diamond particles in one region have lower average sizes or average diameters comparative to a majority of diamond particles in a second region. 138-. (canceled)39. A method of making a polycrystalline diamond cutter , the method comprising:forming a diamond particles feed layer by a process that includes i) making a temporary suspension of diamond particles in a liquid; ii) allowing sedimentation of the diamond particles; and iii) removing the liquid;forming an assembly comprising, along the axis of symmetry of the assembly, a refractory container, the diamond particles feed layer, and a substrate; andprocessing the assembly under high pressure high temperature sintering conditions (HPHT) from 5 GPa to 8 GPa and from 1300° C. to 1600° C. to sinter the diamond feed layer into a diamond body affixed to the substrate;wherein a portion of the diamond feed layer comprises a plurality of diamond particles spatially arranged along a dimension of the layer according to a gradient of particle sizes.40. The method of claim 39 , wherein pouring includes contacting the suspension or the diamond particles with a baffle.41. The method of claim 40 , wherein the baffle directs a portion of the suspension of the diamond particles toward a peripheral region of the refractory container or to a central region of the refractory container.42. The method of claim 39 , wherein the process of forming the diamond feed layer further includes subjecting one or more of the temporary suspension and the sedimented diamond particles to a ...

Insulating product for the refractory industry, corresponding insulating materials and products, and uses

An insulating product for the refractory industry or an insulating material as intermediate for production of such a product, and a corresponding insulating material/insulating product are provided. Likewise the use of a matrix encapsulation process in the production of an insulating product for the refractory industry and a corresponding insulating product and/or an insulating material as intermediate for production of such a product are provided.

CERAMIC COMPOSITIONS

A dried or at least partially dried ceramic feedstock, a method of preparing a dried or at least partially dried ceramic feedstock having a residual solvent content of up to about 15 wt. %, ceramic formulations comprising one or more ceramic precursors, temperature sensitive gelling agent, solvent, and having a viscosity suitable for low pressure injection molding, methods for preparing said ceramic formulations, a method of forming a ceramic article from said ceramic formulations, and a ceramic article obtainable therefrom. 1. A ceramic formulation comprising one or more ceramic precursors , a temperature sensitive gelling agent , and a solvent , wherein the ceramic formulation has a solids concentration of at least 50 vol. % and a viscosity of not more than 10 Pa·s at a shear rate of 100 sat a temperature greater than the gel point of the gelling agent.2. A ceramic feedstock comprising one or more ceramic precursors and a temperature sensitive gelling agent , wherein the ceramic feedstock is dried or at least partially dried and has a solvent content of up to about 15 wt. % , based on the total weight of the ceramic feedstock.3. A ceramic feedstock according to claim 2 , wherein the feedstock is obtainable by a method comprising:preparing, obtaining or providing a ceramic slurry comprising one or more ceramic precursors, a temperature sensitive gelling agent, and a solvent; andtreating the ceramic slurry to obtain a dried or at least partially dried ceramic feedstock having a residual solvent content of up to about 15 wt. %, based on the total weight of the ceramic feedstock.4. A ceramic feedstock according to in powder claim 2 , granulated or pelletized form.5. (canceled)6. (canceled)7. A ceramic feedstock according to claim 3 , wherein the ceramic slurry is prepared by a process comprising:mixing the one or more ceramic precursors with solvent and heating;separately dissolving gelling agent in solvent; andmixing the one or more ceramic precursors with solvent ...

Coloring solution for dental zirconia ceramics and method for using the same

A coloring solution for dental zirconia ceramics and a method for using the same are provided. The coloring solution consists of coloring agents, a solvent, and an additive. The coloring agents are a combination of two or more rare earth metal compounds, wherein the rare earth metal compounds having rare earth metal ions selected from the group consisting of praseodymium (Pr) ions, erbium (Er) ions, cerium (Ce) ions, and neodymium (Nd) ions. The concentration of the rare earth metal ions in the solution is 0.05˜3 mol/liter solvent. The molar ratio of Pr ions:Er ions:Ce ions:Nd ions in the solution is 1:(10˜50):(0˜20):(0˜30).

LARGE AREA SCINTILLATOR PANELS WITH DOPING

A method of making a scintillator material includes forming a dried ceramic composition into a ceramic body with a garnet crystal formula (GdY)Ce(GaAl)O, where x is about 0 to about 2, y is about 0 to about 5, and z is about 0.001 to about 1.0. The ceramic body is sintered to form a sintered ceramic body. The sintered ceramic body is surrounded by a powder mixture that includes a garnet powder. The density of the sintered ceramic body is increased by applying an increased temperature and isostatic pressure to form the scintillator material. 1. A method of making a scintillator material , the method comprising:{'sub': 3-x-z', 'x', 'z', '5-y', 'y', '12, 'forming a dried ceramic composition into a ceramic body comprising a chemical composition (GdY)Ce(GaAl) O, where x is about 0 to about 2, y is about 0 to about 5, and z is about 0.001 to about 1.0;'}sintering the ceramic body to form a sintered ceramic body; andsurrounding the sintered ceramic body by a powder mixture comprising a garnet powder; andincreasing a density of the sintered ceramic body by applying an increased temperature and isostatic pressure to form the scintillator material.2. The method of claim 1 , wherein the chemical composition is GdYCeGaAlO.3. The method of claim 1 , wherein sintering the ceramic body is performed in a presence of oxygen.4. The method of claim 1 , wherein the temperature used to increase the density of the sintered ceramic body is about 1500 to about 1700° C.5. The method of further comprising annealing claim 1 , subsequent to increasing the density of the sintered ceramic body claim 1 , at a temperature of about 1000 to about 1300° C.6. A scintillator material formed by the method of .7. A scintillator detection system comprising the scintillator material formed by the method of .8. A method of making a scintillator material claim 1 , the method comprising;{'sub': 3-x-z', 'x', 'z', '5-y', 'y', '12, 'forming a slurry comprising a garnet crystal formula (GdY)Ce(GaAl) O, where x is ...

Microbial Conductive Ceramics and Preparation Method and Application thereof

The disclosure discloses microbial conductive ceramics and a preparation method and application thereof, and belongs to the technical field of microorganisms and the technical field of semiconductor materials. The disclosure is based on ordinary insulating macroporous ceramics, using the means of cell immobilization and the principle of microbial adsorption, to prepare the microbial conductive ceramics including macroporous ceramics, microbes immobilized on the macroporous ceramics and metal ions adsorbed to the microbes. The microbial conductive ceramics have excellent performance, and the conductivity of the microbial conductive ceramics can reach 2.91×10S/m. At the same time, the cost of the microbial conductive ceramics is low, only 10% of the cost of conductive ceramics with the same conductivity. 1. A preparation method of microbial conductive ceramics , comprising: culturing microbes in a culture medium to a logarithmic growth phase or a stable phase to obtain a microbial bacterial solution; soaking macroporous ceramics in a hydrochloric acid or sodium hydroxide solution and then drying the macroporous ceramics for the first time to obtain pretreated macroporous ceramics; placing the pretreated macroporous ceramics into the microbial bacterial solution for shaking and then drying the macroporous ceramics for the second time to obtain macroporous ceramics with immobilized microbes; and passing a metal ion solution through the macroporous ceramics with immobilized microbes , and then drying the macroporous ceramics for the third time to obtain the microbial conductive ceramics , wherein the microbes comprise saccharomycetes , filamentous fungi or bacteria.2. The preparation method according to claim 1 , wherein when the microbes are saccharomycetes claim 1 , the culture time of the microbes in the culture medium is 12-60 h; when the microbes are filamentous fungi claim 1 , the culture time of the microbes in the culture medium is 24-72 h; and when the microbes ...

Shear binder agglomerates enabling high porosity in ceramic honeycomb bodies

A ceramic precursor mixtures for extrusion and firing into porous ceramics. The ceramic precursor mixtures include ceramic beads and green inorganic shear binder agglomerates. The green inorganic shear binder agglomerates can include inorganic filler particles and a polymeric binder. The green inorganic shear binder agglomerates can deform under an applied shear stress during mixing and/or extrusion such that they are smeared into a plurality of interbead gaps between adjacent ceramic beads or pore former particles. During firing, the smeared green inorganic shear binder agglomerates can sinter and react to form ribbons extending between, and interconnecting adjacent ceramic beads.

COMPOSITE CERAMIC MATERIALS, ARTICLES, AND METHOD OF MANUFACTURE

Composite ceramic materials are disclosed herein which comprise two or more crystalline phases, wherein a first crystalline phase comprises a first refractory material having a first melting point, and a second crystalline phase comprises a second refractory material having a second melting point which is lower than the first melting point, and the second crystalline phase comprises large domain sizes of the second refractory material. Articles comprising such a composite ceramic material, such as honeycomb bodies, catalytic substrates, and particulate filters, are also disclosed herein, in addition to methods of manufacture thereof. 1. A ceramic material comprising:a first crystalline phase comprised of a first refractory material, the first crystalline phase having a first melting point;{'sup': '2', 'a second crystalline phase comprised of a second refractory material having a second melting point which is lower than the first melting point, wherein the second crystalline phase comprises domain sizes of greater than 5,000 μmas measured by Electron Backscattered Diffraction (EBSD).'}2. The ceramic material of wherein the first crystalline phase constitutes at least 50% by volume of the ceramic material.3. The ceramic material of wherein the second crystalline phase constitutes less than 50% by volume of the ceramic material.4. The ceramic material of wherein the first crystalline phase constitutes at least 50% by weight of the ceramic material.5. The ceramic material of wherein the second crystalline phase constitutes less than 35% by weight of the ceramic material.6. The ceramic material of wherein the first crystalline phase constitutes at least 55% by weight of the material claim 1 , and the second crystalline phase constitutes less than 35% by weight of the ceramic material.7. The ceramic material of wherein the first crystalline phase constitutes at least 60% by weight of the material claim 1 , and the second crystalline phase constitutes less than 30% by ...

COMPOSITION FOR FORMING Mn AND Nb CO-DOPED PZT-BASED PIEZOELECTRIC FILM

A composition used for forming a PZT-based piezoelectric film formed of Mn and Nb co-doped composite metal oxides is provided, in which the composition includes PZT-based precursors so that a metal atom ratio (Pb:Mn:Nb:Zr:Ti) in the composition satisfies (1.00 to 1.25):(0.002 to 0.056):(0.002 to 0.056):(0.40 to 0.60):(0.40 to 0.60), a rate of Mn is from 0.20 to 0.80 when the total of metal atom rates of Mn and Nb is 1, a rate of Zr is from 0.40 to 0.60 when the total of metal atom rates of Zr and Ti is 1, and the total rate of Zr and Ti is from 0.9300 to 0.9902 when the total of metal atom rates of Mn, Nb, Zr, and Ti is 1. 1. A composition for forming a Mn and Nb co-doped PZT-based piezoelectric film used for forming a PZT-based piezoelectric film formed of Mn and Nb co-doped composite metal oxides , the composition comprising:PZT-based precursors containing metal atoms configuring the composite metal oxides,wherein the PZT-based precursors are contained in the composition so that a metal atom ratio (Pb:Mn:Nb:Zr:Ti) in the composition satisfies (1.00 to 1.25):(0.002 to 0.056):(0.002 to 0.056):(0.40 to 0.60):(0.40 to 0.60), a rate of Mn is from 0.20 to 0.80 when the total of metal atom rates of Mn and Nb is 1, a rate of Zr is from 0.40 to 0.60 when the total of metal atom rates of Zr and Ti is 1, and the total rate of Zr and Ti is from 0.9300 to 0.9902 when the total of metal atom rates of Mn, Nb, Zr, and Ti is 1.2. The composition for forming a Mn and Nb co-doped PZT-based piezoelectric film according to claim 1 , further comprising:acetylacetone as a stabilizer; anda diol as a solvent.3. The composition for forming a Mn and Nb co-doped PZT-based piezoelectric film according to claim 2 ,wherein the diol is propylene glycol or ethylene glycol.4. The composition for forming a Mn and Nb co-doped PZT-based piezoelectric film according to claim 2 ,wherein an amount of acetylacetone contained in the composition is from 0.5 moles to 4 moles when the total amount of Mn, Nb, ...

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 ...

CERAMIC THERMAL INSULATION

A heat resistant electronic component is disclosed, comprising an electronic component covered by a layer of ceramic thermal insulation material containing lithium molybdate LiMoO. A process for manufacturing the heat resistant electronic component comprises obtaining ceramic thermal insulation material containing lithium molybdate LiMoOin a mouldable form, optionally mixing the ceramic thermal insulation material with at least one additive, covering an electronic component with the material, shaping the material covering the electronic component into a desired form, and drying the desired form at a temperature of from 20° C. to 120° C. 1. A process for manufacturing a heat resistant electronic component , comprising:{'sub': 2', '4, 'obtaining ceramic thermal insulation material containing lithium molybdate LiMoO, in a mouldable form;'}optionally mixing the ceramic thermal insulation material with at least one additive;covering an electronic component with the material;shaping the material covering the electronic component into a desired form; anddrying the desired form at a temperature of from 20° C. to 120° C.2. A process according to claim 1 , wherein it is performed at a temperature of 150° C. or below claim 1 , preferably from 20° C. to 150° C.3. A process according to claim 1 , wherein it comprises at least one of3D printing of the material on top of the electronic component,molding of the material on top of the electronic component, andpressure molding of the material on top of the electronic component.4. A process according to claim 1 , wherein it is performed at an atmospheric pressure.5. A heat resistant electronic component comprising an electronic component covered by a layer of ceramic thermal insulation material containing lithium molybdate LiMoO.6. A heat resistant electronic component according to claim 5 , wherein the electronic component comprises at least one of a battery claim 5 , supercapacitor claim 5 , electrolytic capacitor claim 5 , light ...

3D PRINTING MATERIAL, PREPARATION METHOD AND USE THEREOF

Disclosed are a 3D printing material, a preparation method and use thereof. The 3D printing material is linear, and it comprises, in percent by volume, 16 to 82% of a non-metal material, 17.9 to 83% of a first binder and 0.1 to 1% of a second binder. The material is obtained by pre-treating the non-metallic material, then mixing with the first binder, and extruding. 1. A 3D printing material , comprising:a non-metallic material 16 to 82 vol %;a first binder 17.9 to 83 vol %; anda second binder 0.1 to 1 vol %,wherein the 3D printing material is linear.2. The 3D printing material according to claim 1 , wherein claim 1 , the linear 3D printing material has a diameter in the range of 0.1 to 5 mm.3. The 3D printing material according to claim 1 , wherein claim 1 , the non-metal material has a size distribution D90 of 0.5 to 1.0 μm.4. The 3D printing material according to claim 1 , wherein claim 1 , the non-metal material is selected from any one or a combination of at least two of oxide ceramic materials claim 1 , carbide ceramic materials claim 1 , nitride ceramic materials claim 1 , and graphite materials.5. A preparation method for the 3D printing material according to claim 1 , wherein claim 1 , the preparation method comprises the following steps:(1) mixing a formulated amount of the non-metallic material with a formulated amount of the second binder and then granulating to obtain pellets;(2) mixing the pellets with a formulated amount of the first binder, to obtain a mixture; and(3) extruding the mixture, to obtain the 3D printing material.6. The preparation method according to claim 5 , wherein claim 5 , the non-metal material in Step (1) has a size distribution D90 of 0.5 to 1.0 μm.7. The preparation method according to or claim 5 , wherein claim 5 , the preparation method for the 3D printing material comprises the following steps:(1) mixing the formulated amount of the non-metallic material with a size distribution D90 of 0.5 to 1.0 μm with the formulated amount ...

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 116.-. (canceled)17. A method of forming a composite material film , the method comprising:providing a mixture comprising polyimide or a polyimide precursor, the mixture further comprising silicon particles and graphite particles; andpyrolysing the mixture to convert the polyimide or the polyimide precursor into one or more carbon phases to form the composite material film such that the one or more carbon phases comprises hard carbon that is 10% to 25% by weight of the composite material film and holds together the pyrolysed film, and the silicon particles are between 50% and 90% by weight of the composite material film distributed throughout the one or more carbon phases, wherein after pyrolysing the mixture, the mixture forms a self-supported composite structure.18. The method of claim 17 , further comprising:casting the mixture on a substrate;drying the mixture;removing the dried mixture from the substrate; andplacing the dried mixture in a hot press.19. The method of claim 18 , wherein placing the dried mixture in a hot press comprises placing the dried mixture in a hot press under negligible pressure.20. The method of claim 17 , further comprising forming a battery electrode from the composite material film.21. The method of claim 17 , wherein providing the mixture comprises providing ...

ZIRCONIUM OXIDE COMPOSITE CERAMIC AND PREPARATION METHOD THEREFOR

Provided are a zirconium oxide composite ceramic and a preparation method therefor. The zirconium oxide composite ceramic comprises by mass percentage: 65% to 80% of a zirconium oxide matrix, 10% to 30% of a conductive material, and 2% to 11% of a nano-reinforcing material. The conductive material is selected from at least one of a non-ferrous metal oxide, a white metal oxide, a compound having a perovskite structure and a compound having a spinel structure. The zirconium oxide composite ceramic has excellent antistatic properties and high mechanical properties. 1. A zirconia composite ceramic , comprising: by weight percentage , 65% to 80% of zirconia matrix , 10% to 30% of conductive material , and 2% to 11% of nanometer reinforcing material , wherein the conductive material is at least one selected from the group consisting of nonferrous metal oxide , white metal oxide , compound having perovskite structure , and compound having spinel structure , the colored oxide is at least one selected from the group consisting of CuO , CuO , VO , NiO , MnO , MnO , CoO , CoO , CoO , FeO , FeO , FeO , and CrO; the white oxide is at least one selected from the group consisting of ZnO , SnO , and TiO; the compound having perovskite structure is at least one selected from the group consisting of CaTiO , BaTiO , LaCrO , LaSrCrO , SrTiO , and LaFeO; the compound having spinel structure has a formula of ABO , wherein A is at least one selected from the group consisting of Mg , Fe , Zn , and Mn; B is at least one selected from the group consisting of Al , Cr , and Fe.2. The zirconia composite ceramic according to claim 1 , wherein the zirconia matrix comprises claim 1 , by weight percentage claim 1 , 2% to 10% of stabilizer and 90% to 98% of zirconia claim 1 , the stabilizer is at least one selected from the group consisting of yttria claim 1 , magnesium oxide claim 1 , calcium oxide claim 1 , and cerium oxide.3. The zirconia composite ceramic according to claim 1 , wherein the ...

SIALON COMPOSITE AND CUTTING TOOLS MADE THEREOF

A SiAlON composite includes a SiAlON phase including α-SiAlON phase, β-SiAlON phase and grain boundary phase. The SiAlON composite is prepared from a starting powder mixture including a silicon nitride powder and at least one powder providing aluminum, oxygen, nitrogen, yttrium (Y) and erbium (Er) to the SiAlON composite. The SiAlON composite contains the SiAlON phase of at least 90 vol %, z-value of the β-SiAlON phase ranges between 0.27 and 0.36 and thermal diffusivity of the SiAlON composite is equal to or greater than 2.4 (mm/sec) and equal to or less than 5.2 (mm/sec). 1. A SiAlON composite comprising a SiAlON phase including α-SiAlON phase , β-SiAlON phase and grain boundary phase ,wherein the SiAlON composite is prepared from a starting powder mixture including a silicon nitride powder and at least one powder providing aluminum, oxygen, nitrogen, yttrium (Y) and erbium (Er) to the SiAlON composite,wherein the SiAlON composite contains the SiAlON phase of at least 90 vol %,wherein z-value of the β-SiAlON phase ranges between 0.27 and 0.36, and{'sup': 2', '2, 'wherein a thermal diffusivity of the SiAlON composite is equal to or greater than 2.4 (mm/sec) and equal to or less than 5.2 (mm/sec).'}2. The SiAlON composite of claim 1 , wherein a thermal conductivity of the SiAlON composite is equal to or greater than 8.2 (W/(m·K)) and equal to or less than 11.4 (W/(m·K)).3. The SiAlON composite of claim 1 , wherein a thermal expansion coefficient of the SiAlON composite is equal to or greater than 3.4 (10/K) and equal to or less than 4.0 (10/K).4. The SiAlON composite of claim 1 , wherein a ratio of the α-SiAlON phase to the SiAlON phase is equal to or greater than 21.75% and equal to or less than 48.5%.5. The SiAlON composite of claim 1 , wherein the starting powder mixture includes alumina (AlO) claim 1 , yttria (YO) and erbia (ErO) claim 1 , andwherein the sum of contents of the alumina, the yttria and the erbia ranges from 8.87 wt % to 11.83 wt %.6. The SiAlON ...

MODIFIED NI-ZN FERRITES FOR RADIOFREQUENCY APPLICATIONS

Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Cosuch that the relaxation peak associated with the Cosubstitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band. 1. (canceled)2. A fine-tuned nickel-zinc ferrite material comprising:{'sup': '2+', 'sub': 1-x-y', 'x', 'y', '2', '4, 'a base nickel-zinc ferrite material doped with cobalt (CO) to adjust a nickel to zinc ratio of the base nickel-zinc ferrite material thereby providing a Ni/Zn relaxation absorption peak at a desired frequency above a desired low magnetic loss frequency, the cobalt being doped into the base nickel-zinc ferrite material to a level where a cobalt dominated relaxation peak merges into a low frequency end of the Ni/Zn relaxation absorption peak, the fine-tuned nickel-zinc ferrite material being represented by the formula NiZnCoFeO, x being between 0.2 and 0.6, and y being between 0 and 0.2'}3. The fine-tuned nickel-zinc ferrite material of wherein the fine-tuned nickel-zinc ferrite material has a composition NiCoZnFeO.4. The fine-tuned nickel-zinc ferrite material of wherein the base nickel-zinc ferrite material has a composition NiZnFeO.5. The fine-tuned nickel-zinc ferrite material of wherein the fine-tuned nickel-zinc ferrite material has a permeability in excess of 100.6. The fine-tuned nickel-zinc ferrite material of wherein the desired frequency is about 100 MHz.7. A radiofrequency component comprising:{'sup': '2+', 'sub': 1-x-y', 'x', 'y', '2', '4, ...

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.

WEAR-RESISTANT MATERIAL, LOCALLY-REINFORCED LIGHT METAL MATRIX COMPOSITES AND MANUFACTURING METHOD

A composition of the wear-resistant material of the present invention includes high-temperature resistant skeleton metal materials, ceramic fiber materials and ceramic particle materials with the mass ratio of (10-60):(1-30):(10-70). The high-temperature resistant skeleton metal materials are foam metal or high-temperature resistant metal fibers. The wear-resistant material is good in wear-resistance, high in tenacity, suitable for occasions with high requirements for wear-resistance and tenacity and capable of being locally attached to the surface of the light metal alloy matrix to improve the wear-resistance and tenacity of the light metal alloy matrix under high temperature conditions. The locally-reinforced light metal matrix composites of the present invention are the light metal alloy matrix locally-reinforced through the wear-resistant material. A manufacturing method of the locally-reinforced light metal matrix composites of the present invention is to metallurgically bond the wear-resistant layer with the light metal alloy matrix is through the squeeze casting technique. 1. A wear-resistant material , comprising high-temperature resistant skeleton metal materials , ceramic fiber materials and ceramic particle materials with the mass ratio of (10-60):(1-30):(10-70); the high-temperature resistant skeleton metal material are foam metal or high-temperature resistant metal fibers; the high-temperature resistant metal fibers comprise one or more of iron-based alloy fibers , nickel-based alloy fibers , copper-based alloy fibers , stainless steel fibers , steel wool fibers , titanium-based alloy fibers and cobalt-based alloy fibers; the ceramic fiber materials comprise one or more of alumina fibers , alumina silicate fibers , silicon dioxide fibers , zirconium oxide fibers , silicon carbide fibers , graphite fibers and carbon fibers; the ceramic particle materials comprise one or more of flyash particles , superfine slag powder particles , silicon carbide ...

METHOD AND APPARATUS FOR FORMING VARIABLE DENSITY SINTERED CERAMIC USING APPLICATION OF ALTERNATING VOLTAGE TO AQUEOUS CERAMIC SUSPENSION WITH ICE-TEMPLATING

A method and apparatus for forming variable density ceramic structures, where the method includes: obtaining a ceramic powder having an ultrafine particle size; mixing the ceramic powder into a suspension fluid thus forming a ceramic suspension; providing a mold configured to retain the ceramic suspension; providing a plurality of electrodes about the mold; applying an alternating voltage to the electrodes thus forming alternating electric currents through the suspension thus causing accumulation of ceramic particles on at least one of the electrodes; reducing the temperature of the suspension thus inducing the formation of ice crystals therein necessary for ice-templating; freeze drying the frozen suspension into a porous state; and sintering the ceramic particles into a solid architecture retaining a common final structure with the ceramic particles in the porous state. 1. A method of forming variable density ceramic structures , the method comprising:obtaining a ceramic powder having an ultrafine particle size;mixing the ceramic powder into a suspension fluid thus forming a ceramic suspension;providing a mold configured to retain the ceramic suspension;providing a plurality of electrodes about the mold;applying an alternating voltage to the electrodes thus forming alternating electric currents through the suspension thus causing accumulation of ceramic particles on at least one of the electrodes;reducing the temperature of the ceramic suspension thus inducing the formation of ice crystals therein;freezing the ceramics suspension until the suspension fluid is completely frozen;drying the frozen suspension so as to remove the suspension fluid and leaving the ceramic powder, the ceramic powder being retained in a porous accumulated state; andsintering the ceramic particles into a solid architecture retaining a common final structure with the ceramic particles in the porous accumulated state.2. The method of forming variable density ceramic structures of claim 1 , ...

Process for manufacturing an object from a sol-gel solution

A process for manufacturing an object made of a constituent material obtained from a sol-gel solution, the process including, successively: a) introducing the sol-gel solution into a mold of the object to be manufactured; b) gelling the sol-gel solution; c) drying the gel obtained in b) in the mold, by which the gel is converted into the constituent material of the object, wherein the mold includes a closed chamber and includes a material configured to allow evacuation of gases formed during b) and/or c).

CERAMIC COMPOSITIONS

A dried or at least partially dried ceramic feedstock, a method of preparing a dried or at least partially dried ceramic feedstock having a residual solvent content of up to about 15 wt. %, ceramic formulations comprising one or more ceramic precursors, temperature sensitive gelling agent, solvent, and having a viscosity suitable for low pressure injection molding, methods for preparing said ceramic formulations, a method of forming a ceramic article from said ceramic formulations, and a ceramic article obtainable therefrom. 129-. (canceled)30. A method of preparing a ceramic feedstock comprising:preparing a ceramic slurry comprising one or more ceramic precursors, temperature sensitive gelling agent, and solvent, andtreating the ceramic slurry under suitable conditions to obtain a dried or at least partially dried ceramic feedstock having a residual solvent content of up to about 15 wt. %, based on the total weight of the ceramic feedstock.31. The method of preparing a ceramic feedstock of claim 30 , wherein the ceramic slurry is prepared by a process comprising:mixing the one or more ceramic precursors with solvent and heating;separately dissolving gelling agent in solvent, andmixing the dissolved gelling agent with the mixture of ceramic precursors and solvent.32. The method of preparing a ceramic feedstock of claim 31 , wherein the mixture of ceramic precursors and solvent further includes a dispersant.33. The method of preparing a ceramic feedstock of claim 31 , further including mixing a reinforcing additive with the gelling agent dissolved in solvent.34. The method of preparing a ceramic feedstock of claim 30 , wherein treating the ceramic slurry comprises: cooling the ceramic slurry to below the gel point of the gelling agent claim 30 , shredding the resultant cooled ceramic gelled material claim 30 , drying and milling the shredded cooled ceramic gelled material.35. The method of preparing a ceramic feedstock of claim 30 , wherein treating the ceramic ...

Additive manufacturing process for producing ceramic articles using a sol containing nano-sized particles

The present invention relates to a process for producing a ceramic article, the process comprising the steps of providing a printing sol, the printing sol comprising solvent, nano-sized particles, radiation curable monomer(s) and photoinitiator, the printing sol having a viscosity of less than 500 mPa*s at 23° C., processing the printing sol as construction material in an additive manufacturing process to obtain a 3-dim article being in a gel state, the 3-dim article having a Volume A, transferring the 3-dim article being in a gel state to a 3-dim article being in an aerogel state, heat treating the 3-dim article to obtain a sintered 3-dim ceramic article, the ceramic article having a Volume F, Volume A of the 3-dim article in a gel state being more than 500% of Volume F of the ceramic article in its sintered state. The invention also relates to a ceramic article obtainable according to such a process. The ceramic article can have the shape of a dental or orthodontic article.

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 ...

Additive Manufacturing of Structural Components on the Basis of Silicone Carbide with Embedded Diamond Particles

The invention relates to a method for producing structural components that have diamond particles embedded in a silicon carbide matrix, and to the structural components that can be obtained by this method. 1. A process for preparing a component by using additive manufacturing methods , characterized in that the component has diamond particles embedded in a silicon carbide matrix , wherein said process comprises a step in which a first layer of at least one first material based on silicon carbide is deposited , and another step in which a second layer of at least one second material based on silicon carbide is deposited , wherein at least one of said materials based on silicon carbide includes diamond particles.2. The process according to claim 1 , characterized in that the additive manufacturing method is selected from the group consisting of stereolithography (SL) claim 1 , material jetting/direct ink printing (DIP) claim 1 , direct ink writing (DIW) claim 1 , robocasting (FDM) claim 1 , binder jetting (3DP) claim 1 , selective laser sintering claim 1 , and combinations of such methods.3. The process according to claim 1 , characterized in that the first material based on silicon carbide and the second material based on silicon carbide are the same or different.4. The process according to claim 1 , characterized in that the diamond particles are diamond particles selected from the group consisting of nanodiamond particles claim 1 , microdiamond particles claim 1 , and mixtures thereof claim 1 , wherein said nanodiamond particles preferably have a particle size of from 40 to 160 nm and said microdiamond particles preferably have a particle size of from 3 to 300 μm claim 1 , respectively claim 1 , as determined by laser diffractometry.5. The process according to claim 1 , characterized in that the process comprises the following steps:a) depositing a first material based on silicon carbide;b) depositing a binder in accordance with the desired geometry of the later ...

METHOD FOR PREPARATION OF DENSE HfC(Si)-HfB2 COMPOSITE CERAMIC

A method for the preparation of a dense HfC(Si)—HfBcomposite ceramic. hafnium oxide powders, nano-sized carbon black and silicon hexaboride powders are mixed in a molar ratio of (1-10):(1-20):(1-5) to obtain a powder mixture. The powder mixture is subjected to ball milling, dried and transferred to a graphite mold for spark plasma sintering. In this way, an in-situ carbon-boron reduction reaction and the sintering densification are completed in one step, and the obtained HfC(Si)—HfBcomposite ceramic has a density of 94.0%-100% and uniformly dispersed grains. 1. A method for the preparation a HfC(Si)—HfBcomposite ceramic , comprising:1) mixing hafnium oxide powders, nano-sized carbon black and silicon hexaboride powders in a molar ratio of (1-10):(1-20):(1-5) to obtain a powder mixture;2) subjecting the powder mixture obtained in step (1) to ball milling to obtain a ball-milled product; and drying the ball-milled product to obtain a dried product;{'sub': '2', '3) transferring the dried product to a graphite mold followed by spark plasma sintering to obtain the HfC(Si)—HfBcomposite ceramic with a density of 94.0%-100% and uniformly dispersed grains.'}2. The method of claim 1 , wherein in step (1) claim 1 , a particle size of the hafnium oxide powders is 50-500 nm; a particle size of the nano-sized carbon black is 50 nm; and a particle size of the silicon hexaboride powders is 1-5 μm.3. The method of claim 1 , wherein in step (2) claim 1 , the ball milling is performed in a planetary ball mill.4. The method of claim 1 , wherein in step (2) claim 1 , a medium used in the ball milling is isopropanol.5. The method of claim 1 , wherein in step (2) claim 1 , a weight ratio of the powder mixture to balls of the planetary ball mill is 1:(4-20).6. The method of claim 3 , wherein in step (2) claim 3 , the ball milling is performed at 200-500 r/min for 6-24 h.7. The method of claim 1 , wherein in step (2) claim 1 , the ball-milled product is dried in an electric blast drying ...

SYSTEMS AND METHODS FOR CERAMIC MATRIX COMPOSITES

Methods for fabricating a ceramic matrix composite are disclosed. A fiber preform may be placed in a mold. An aqueous solution may be added to the fiber preform. The aqueous solution may include water, carbon nanotubes, and a binder. The preform may be frozen. Freezing the preform may cause the water to expand and separate fibers in the fiber preform. The carbon nanotubes may bond to the fibers. The preform may be freeze dried to remove the water. The preform may then be processed according to standard CMC process. 1. A ceramic matrix composite formed by a process comprising:inserting a fiber tow in a mold;introducing an aqueous solution comprising water, carbon nanotubes, and a binder into the mold;freezing the aqueous solution, wherein the freezing the aqueous solution separates fibers within the fiber tow;freeze drying the aqueous solution, wherein the freeze drying removes the water from the mold; andprocessing the mold via at least one of slurry casting, chemical vapor infiltration, polymer infiltration and pyrolysis, or melt infiltration.2. The ceramic matrix composite of claim 1 , wherein the process further comprises converting the carbon nanotubes to at least one of boron carbide or boron nitride nanotubes.3. The ceramic matrix composite of claim 1 , wherein the process further comprises converting the carbon nanotubes to silicon carbide nanotubes.4. The ceramic matrix composite of claim 1 , wherein the carbon nanotubes are bonded to fibers.5. The ceramic matrix composite of claim 1 , wherein the carbon nanotubes form an interfacial region surrounding the fibers. This application is a divisional application of U.S. patent application Ser. No. 14/838,856, filed Aug. 28, 2015, entitled “SYSTEMS AND METHODS FOR CERAMIC MATRIX COMPOSITES,” which claims priority to, and the benefit of U.S. Provisional Application No. 62/046,368, entitled “SYSTEMS AND METHODS FOR CERAMIC MATRIX COMPOSITES,” filed on Sep. 5, 2014. The entire content of each of these applications ...

INTEGRAL CERAMIC MATRIX COMPOSITE FASTENER WITH NON-POLYMER RIGIDIZATION

A method of forming an integral fastener for a ceramic matrix composite component comprises the steps of forming a fiber preform with an opening, forming a fiber fastener, inserting the fiber fastener into the opening, and infiltrating a matrix material into the fiber preform and fiber fastener to form a ceramic matrix composite component with an integral fastener. A gas turbine engine is also disclosed. 1. A gas turbine engine component comprising: a fiber preform with an opening that has a wide portion at one surface of the fiber preform and a narrow portion at an opposite surface of the fiber preform,', 'a fiber fastener having a fastener body extending from a first end to a second end, the fastener body defined by a first dimension and having an enlarged head at the first end of the fastener body that is defined by a second dimension that is greater than the first dimension,', 'wherein the fiber fastener is inserted into the opening to form a dry fiber preform and fiber fastener assembly, the fastener body extending through the dry fiber preform such that the enlarged head portion is received within the wide portion of the opening, and', 'wherein a matrix material is infiltrated into the dry fiber preform and fiber fastener assembly to provide the single-piece structure; and, 'a gas turbine engine component body formed of a ceramic matrix composite material having at least one fastener integrally formed with the gas turbine engine component body as a single-piece structure, wherein the single-piece structure initially comprises'}an engine support structure, wherein the at least one fastener of the single-piece structure connects the gas turbine engine component body to the engine support structure.2. The gas turbine engine component according to wherein the fiber preform comprises a rigidized preform structure having the opening to receive the fiber fastener claim 1 , and wherein the fiber fastener comprises a woven fastener formed from a fiber based material ...

Method for collecting living tissue

A biological tissue collection method includes: preparing a component, the component including a first surface, a second surface, multiple (n≥2) holes for passing air from the first surface toward the second surface, and a wall formed between the holes, and an end portion of the wall on a first surface side being rounded and formed as a curved surface; sucking a biological tissue with a dimension of equal to or greater than 0.5 mm and equal to or less than 100 mm in a maximum direction in contact with the holes on the first surface side, thereby collecting the biological tissue by means of the holes; and taking equal to or greater than 50% and equal to or less than 90% of an area of the biological tissue as a total area of the holes used for collection.

ACCELERATED CVI DENSIFICATION OF CMC THROUGH INFILTRATION

A process for densification of a ceramic matrix composite comprises forming a reinforcing ceramic continuous fiber stack having a central zone bounded by an outer zone adjacent; locating first particles within the central zone; coating the first particles and the ceramic fibers with silicon carbide through chemical vapor infiltration; locating second particles within the outer zone; coating the second particles and the ceramic fibers with silicon carbide through chemical vapor infiltration; forming the stack into a predetermined three dimensional shape; and densifying the stack. 1. A process for densification of a ceramic matrix composite comprising:forming a reinforcing ceramic continuous fiber stack having a central zone bounded by a middle zone and an outer zone adjacent said middle zone opposite said central zone;locating small particles within said central zone;coating said small particles and said ceramic fibers with silicon carbide through chemical vapor infiltration;locating medium particles within said middle zone;coating said medium particles and said ceramic fibers with silicon carbide through chemical vapor infiltration;locating large particles within said outer zone; and coating said large particles and said ceramic fibers with silicon carbide through chemical vapor infiltration;forming said preform into a predetermined three dimensional shape; anddensifying said stack.2. The process of claim 1 , wherein said reinforcing ceramic continuous fiber stack comprises fiber tows aligned into a plies claim 1 , each fiber tow having a surface having pores.3. The process of claim 2 , wherein said step of locating small particles within said central zone further comprises coating said surface of the fiber tow proximate said central zone with a slurry containing said small particles.4. The process of claim 2 , wherein said step of locating medium particles within said middle zone further comprises coating said surface of the fiber tow proximate said middle zone ...

SINTERED PLATELET-LIKE RANDOMLY SHAPED ABRASIVE PARTICLES AND METHOD OF MAKING SAME

The present invention relates to sintered platelet-like randomly shaped abrasive particles based on alpha alumina having a hardness Hof at least 20 GPa and a crystal structure with an average crystal size between 100 nm and 300 nm, whereby the abrasive particles comprise a body having a first surface and a second surface opposite to the first surface, both surfaces are separated from each other by a randomly shaped sidewall having a thickness (T) between 20 μm and 500 μm. 1. Abrasive particles , comprisinga body having a first surface and a second surface opposite to the first surface, whereinthe first and second surfaces are separated by a randomly shaped sidewall having a thickness (T) between 20 μm and 500 μm,the abrasive particles have a crystal structure with an average crystal size between 100 and 300 nm, andthe crystal structure comprises α-alumina crystals.2. The abrasive particles of claim 1 , whereinthe abrasive particles have a chemical composition comprising of between 1% and 20% by weight zirconia, andat least 50% by weight of the zirconia are present in the tetragonal modification.3. The abrasive particles of claim 2 , whereinthe crystal structure comprises a dominant continuous phase of α-alumina crystals and a secondary phase of substantially intergranular oriented zirconia crystals, andthe crystal size of the zirconia crystals is less than 100 nm.4. The abrasive particles of claim 2 , wherein the chemical composition additionally comprises between 0.5% and 5% by weight MgO.5. The abrasive particles of claim 2 , wherein the chemical composition comprises between 1% and 10% by weight zirconia.6. The abrasive particles of claim 2 , wherein at least 75% by weight of the zirconia is present in the tetragonal modification.7. The abrasive particles of claim 2 , wherein the average crystal size of the alumina and zirconia crystals is below 250 nm.8. The abrasive particles of claim 1 , wherein the abrasive particles have a circularity (C) of more than 0.60.9 ...

Honeycomb filter

A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 9 to 14 μm and an average pore diameter of the partition wall in the outflow side region is 15 to 20 μm.

FORMING A CERAMIC PRODUCT

A method of forming a ceramic product, the method comprising producing a ceramic foaming mixture in the form of a slurry, causing the slurry to foam, extruding the foamed slurry to produce a plurality of lengths of extruding material each with a diameter of less than 10 mm, firing the extruded material so as to partially sinter the extruded material, forming the partially sintered extruded material into a required shape for a product, and subsequently firing the shaped partially sintered extruded material to form the ceramic product. 178-. (canceled)79. A method of forming a ceramic product , the method comprising:producing a ceramic forming mixture in the form of a slurry;causing the slurry to foam, extruding the foamed slurry to produce a plurality of lengths of extruded material each with a diameter of less than 10 mm;firing the extruded material so as to partially sinter the extruded material;forming the partially sintered extruded material into a required shape for a product; andsubsequently firing the shaped partially sintered extruded material to form the ceramic product.80. The method according to claim 79 , wherein the lengths of extruded material are cut or broken into a plurality of pieces prior to forming into the required shape.81. The method according to claim 80 , wherein the pieces are less than 25 mm long.82. The method according claim 79 , wherein a foaming agent is added to the slurry to aid foaming.83. The method according to claim 79 , wherein the causing the slurry to foam includes feeding air into the slurry claim 79 , and the air and the slurry mixed together to entrain the air within the slurry.84. The method according to claim 83 , wherein the causing the slurry to foam includes feeding the slurry and air into a foaming unit.85. The method according to claim 79 , wherein a setting agent is added to the slurry.86. The method according to claim 79 , wherein the ceramic forming mixture includes:10-40% water;20-80% of a ceramic forming material ...

ORTHOPHOSPHATE THERMAL BARRIER COATING MATERIAL WITH HIGH COEFFICIENT OF THERMAL EXPANSION AND PREPARATION METHOD THEREOF

The present disclosure relates to an orthophosphate thermal barrier coating material with high coefficient of thermal expansion and a preparation method thereof. ReMPOseries ceramics with an eulytite crystal structure are prepared by a high-temperature solid-phase reaction for the first time. The ReMPOceramic belongs to a −43 m space group of a cubic crystal system, which not only has a higher melting point and excellent high-temperature phase stability, but also has a lower thermal conductivity and a suitable coefficient of thermal expansion. It can effectively alleviate the stress caused by the mismatch of the coefficient of thermal expansion of the base material and the ceramic layer, so as to meet the requirements of thermal insulation and high-temperature oxidation and corrosion resistance of the hot end parts in long-term service, which has application prospects in the field of thermal barrier coatings. 1. An orthophosphate thermal barrier coating material with high coefficient of thermal expansion , having a general chemical formula of ReMPO , which belongs to a −43 m space group of a cubic crystal system with an eulytite crystal structure , wherein Re is a rare earth element , and M is an alkaline earth metal.2. The orthophosphate thermal barrier coating material with high coefficient of thermal expansion according to claim 1 , wherein Re is one or two or a combination of more than two of Y claim 1 , La claim 1 , Nd claim 1 , Sm claim 1 , Gd claim 1 , Dy claim 1 , Ho claim 1 , Er or Yb claim 1 , and M is one or two or a combination of more than two of Sr claim 1 , Ca or Ba.3. The orthophosphate thermal barrier coating material with high coefficient of thermal expansion according to claim 1 , wherein the orthophosphate thermal barrier coating material is selected from one of NdBaPO claim 1 , GdBaPO claim 1 , DyBaPO claim 1 , HoBaPO claim 1 , or ErBaPO.4. A method for preparing the orthophosphate thermal barrier coating material with high coefficient of ...

METHOD FOR MANUFACTURING PILLAR-SHAPED HONEYCOMB FIRED BODY

A method for manufacturing a pillar-shaped honeycomb fired body including: measuring a firing shrinkage at an end surface of a first pillar-shaped honeycomb firing body at every predetermined angle for one round based on a portion that has been located at the center of a die when a green body passes through the die, obtaining a second pillar-shaped honeycomb formed body having a corrected end surface contour by modifying an annular mask used for extrusion molding based on a result of the measuring, and then obtaining a second pillar-shaped honeycomb fired body by performing drying and firing. 1. A method for manufacturing a pillar-shaped honeycomb fired body having an outer peripheral side surface and partition walls that are disposed on an inner peripheral side of the outer peripheral side surface and partition a plurality of cells each forming a flow path from a first end surface to a second end surface , the method comprising:a step A1 of preparing a first pillar-shaped honeycomb formed body by performing extrusion molding of a green body comprising a ceramic raw material, a pore-forming material, a binder and a dispersion medium, through a die that defines opening shapes of the plurality of cells, and an annular mask that is disposed downstream of the die and has an inner peripheral contour for defining an outer peripheral contour of the first end surface and the second end surface;a step B1 of drying the first pillar-shaped honeycomb formed body to obtain a first pillar-shaped honeycomb dried body;a step C1 of measuring an actual distance from a portion that has been located at a center of the die when the green body passes through the die to the outer peripheral side surface at every predetermined angle for one round in at least one of the first end surface and the second end surface of the first pillar-shaped honeycomb dried body;a step D1 of firing the first pillar-shaped honeycomb dried body to obtain a first pillar-shaped honeycomb fired body;a step E1 of ...

CERAMICS PROCESSING

Methods for ceramic processing, for example a method for removing water from a ceramic green body, a method for extruding a ceramic composition, a method of plugging a ceramic honeycomb structure, and a method for coating a ceramic honeycomb structure with a skin composition, and related products. 1. A method for removing water from a ceramic green body , the method comprising:immersing the ceramic green body in an organic liquid in a container, wherein the organic liquid is at a temperature sufficient to vaporize water in the ceramic green body; andremoving the mixture of vaporized water and organic liquid from the container.220.-. (canceled)21. The method of claim 1 , wherein the organic liquid continuously flows into and out of the container during immersion.22. The method of claim 1 , wherein the organic liquid and vaporized water are separated upon leaving the container.23. The method of claim 1 , wherein the organic liquid is re-heated upon leaving the chamber and re-introduced into the container.24. The method of claim 1 , wherein the temperature of the organic liquid is equal to or greater than the vaporization temperature of water.25. The method of claim 1 , wherein the temperature of the organic liquid is at least about 5° C. or at least about 10° C. greater than the vaporization temperature of water.26. The method of claim 1 , wherein the process is carried out in a chamber and the pressure inside the chamber is reduced.27. The method of claim 1 , wherein the pressure inside the chamber is equal to or less than about 200 mbar claim 1 , for example equal to or less than about 100 mbar.28. The method of claim 1 , wherein the pressure inside the chamber is equal to or less than about 100 mbar and the temperature of the organic liquid that is introduced into the chamber is equal to or greater than about 55° C.29. The method of claim 1 , wherein the organic liquid is not miscible with water.30. The method of claim 1 , wherein the organic liquid comprises one ...

INDUSTRIAL SOLID WASTE BASED CONSTRUCTION AND TECHNICAL CERAMICS

A ceramic for construction or technical applications, composed of at least one of Municipal Solid Waste Incinerator Bottom Ash (MSWIBA) and other recycled industrial solid waste and different methods of forming such ceramics. Various techniques illustrate how ceramics are formed using at least one of extrusion shaping, dry powder compaction and agglomeration, any of which can be preceded by a pre-treatment process of received feedstock. 1. A method of producing a ceramic product comprising:receiving as a first component material a first feedstock;receiving as a second component material a second feedstock;combining the first and second component materials with water to form at least one of (1) an extrudable paste and (2) a granulated mixture;forming a green body rom the at least one of (1) the extrudable paste after extrusion and (2) the granulated mixture;drying the green body;firing the green body to form the ceramic product; andcooling the ceramic product.2. The method as claimed in claim 1 , wherein the first component material is pretreated Municipal Solid Waste Incinerator Bottom Ash (MSWIBA) claim 1 , and wherein the second component material is Unfired Raw Ceramic Material (UCRM) powder.3. The method as claimed in claim 2 , wherein the first component i at least by weight of the first and second components mixture.4. The method as claimed in claim 2 , wherein the second component is at least 10% by weight of the first and second components mixture.5. The method as claimed in claim 2 , wherein the first component is 80% by weight of the first and second components mixture claim 2 , andwherein the second component is 20% by weight of the first and second components mixture.6. The method as claimed in claim 2 , wherein combining the first anti second components further comprises combining a third component material to form the at least one of (1) the extrudable paste and (2) the granulated mixture claim 2 , wherein the third component is selected from the group ...

SIC COMPOSITE AND METHOD FOR MANUFACTURING THE SAME

The present invention relates to a SiC composite and a method for manufacturing the same. More particularly, the present invention relates to a slurry composition for ceramic matrix composites which can not only reduce the number of precursor impregnation pyrolysis (PIP) cycles but also be useful in the PIP process to increase hardness, thermal stability, and relative density. 1. A slurry composition for ceramic matrix composites , comprising:at least 58 vol % of a SiC filler;a dispersion medium; anda dispersant{'sub': 50', '50, 'wherein the SiC filler consists of only fine particles having a Ddiameter of 200 nm or less or consists of the fine particles and coarse particles having a Ddiameter of 3 μm or more in a ratio of 2:1 to 4.5:1.'}2. The slurry composition of claim 1 , wherein the SiC filler is oxidized.3. The slurry composition of claim 1 , wherein the fine particles have a Ddiameter of 100 to 200 nm and the coarse particles have a Ddiameter of 3 to 20 μm.4. The slurry composition of claim 1 , wherein the dispersion medium is water and the dispersant is included in an amount of 0.6 to 1.2 wt %.5. A SiC/SiC composite material as a matrix of a ceramic matrix composite claim 1 , the SiC/SiC composite material comprising a SiC filler and a SiC-based precursor-derived ceramic claim 1 , wherein a volume ratio of the SiC filler is 60 vol % or more based on the total volume claim 1 , and wherein the relative density of a green body manufactured by a slurry molding is 60% or more.6. A SiC particle-reinforced SiC composite densified through precursor impregnation pyrolysis (PIP) of a green body prepared by drying a slurry composition for ceramic matrix composites according to claim 1 , wherein the composite has a hardness of 10 GPa or more after 4 or less PIP cycles.7. The SiC particle-reinforced SiC composite of claim 6 , wherein an amount of a precursor-derived ceramic phase in the SiC particle-reinforced SiC composite is 9.5 to 37 vol %.8. The SiC particle- ...

Polymer and porous inorganic composite article and methods thereof

An inorganic circuit board article including: a porous inorganic sheet having a low dielectric loss of from 1×10 −5 to 3×10 −3 at a high frequency of from 10 to 30 GHz and the porous inorganic sheet has a percent porosity of from 30 to 50 vol %; a dielectric polymer having a low dielectric loss of from 10 −4 to 10 −3 at a high frequency of from 10 to 20 GHz, wherein the dielectric polymer occupies the pores of the porous inorganic sheet, and the inorganic circuit board article has a dielectric loss of from 1×10 −4 to 9×10 −4 . The disclosure also includes methods of making and using the inorganic circuit board article.

NEEDLE-SHAPED CYLINDER LINER AND PREPARATION METHOD THEREFOR, AND COATING LIQUID FOR PREPARING NEEDLE-SHAPED CYLINDER LINER

A coating liquid for preparing a needle-shaped cylinder liner, comprising the following components: 0.05-0.4 parts of an anionic surfactant; 0.05-0.5 parts of tannic acid; 0.15-0.7 parts of caustic soda; 22-38 parts of diatomite; 3-10 parts of montmorillonite; and 62-75 parts of water. A method for preparing a needle-shaped cylinder liner comprises spraying a coating liquid for preparing the needle-shaped cylinder liner onto the inner wall of a hollow cylindrical mould, and drying the coating liquid to obtain a mould with a coating attached to the surface of the inner wall; adding an inoculated iron liquid into the rotary mould, and cooling and demoulding to obtain a cylinder liner blank; and subjecting the blank to outer surface cleaning and forming machining to obtain the needle-shaped cylinder liner. 2. The coating solution according to claim 1 , wherein the anionic surfactant comprises one or more selected from the group consisting of sodium dodecyl benzene sulfonate claim 1 , triethanolamine dodecyl benzene sulfonate claim 1 , surfactant AS and ammonium dodecyl sulfate.3. The coating solution according to claim 1 , wherein the diatomaceous earth has a permeability of 2 to 3.4. The coating solution according to claim 1 , wherein the diatomaceous earth has a bulk density of 0.33 to 0.65 g/cm.5. The coating solution according to claim 1 , wherein the diatomaceous earth has a particle size of 100 to 800 mesh.6. The coating solution according to claim 1 , wherein the montmorillonite has a density of 2.0 to 2.7 g/cm.7. The coating solution according to claim 1 , wherein the montmorillonite has an expansion ratio of 30 to 50.8. The coating solution according to claim 1 , wherein the montmorillonite has a particle size of 0.2 to 1 μm.10. A method for producing a needle-shaped cylinder liner claim 1 , comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a) spraying the coating solution according to into an inner wall of a hollow cylindrical mold ...

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. ...

Transparent spinel article and tape cast methods for making

A transparent, tape casted, spinel article, as defined herein. Also disclosed is a method of method of making the tape casted, transparent spinel, and laminates of the tape casted, transparent spinel, as defined herein.

CERAMIC STRUCTURES

A ceramic composition, optionally in the form of a honeycomb structure, ceramic precursor compositions suitable for sintering to form said ceramic composition, a method for preparing said ceramic composition and ceramic honeycomb structure, a diesel particulate filter comprising said ceramic honeycomb structure, and a vehicle comprising said diesel particulate filter. 1. A ceramic composition comprising:from about 15 wt. % to less than about 50 wt. % mullite;from about 40 wt. % to about 75 wt. % tialite; andat least about 1.0 wt. % of a Zr-containing mineral phase;wherein the weight ratio of tialite to mullite is greater than 1:1, and{'sup': −6', '−1, 'wherein the ceramic composition has a coefficient of thermal expansion (CTE) of equal to or less than about 1.5×10° C., and a thermal strength parameter (TSP) of at least about 150° C.'}2. A ceramic composition according to claim 1 , wherein the ceramic composition comprises from about 40 wt. % to about 55 wt. % tialite.3. A ceramic composition according to wherein the ceramic composition has a CTE of less than about 1.5×10° C.and a TSP of at least about 170° C.4. A ceramic composition according to claim 1 , wherein the ceramic composition comprises from about 1.0 wt. % to about 8 wt. % of the Zr-containing mineral phase.5. A ceramic composition according to claim 4 , wherein the ceramic composition comprises from about 45 wt. % to about 55 wt. % tialite and from about 3.0 wt. % to about 8.0 wt. % of the Zr-containing mineral phase.6. A ceramic composition according to claim 1 , wherein the Zr-containing phase comprises at least about 20 wt. % zirconium titanate.7. A ceramic composition according to claim 1 , further comprising from about 0.5 wt. % to about 8 wt. % of an alkaline earth metal-containing mineral phase.8. A ceramic composition according to claim 1 , wherein: (i) a nominal beam strength claim 1 , S claim 1 , of the ceramic composition increases at elevated temperatures and (ii) the Sof the ceramic ...

Spherical pellets containing common clay particulate material useful as a proppant in hydraulic fracturing of oil and gas wells

Ceramic propping agents include a plastic clay, aluminosilicate network modifier, strength enhancing agent, and binder. Usable strength enhancing agents can include nepheline materials having 0.1 to 5 percent iron oxide by weight. A resin coating can be used to encapsulate particles of the ceramic propping agent. The propping agent can be produced by grinding the components to the same approximate particle size, nucleating the particles by adding water, growing the resulting spherical pellets by adding additional particles that adhere to the surface of the spherical pellets, and vitrifying the pellets to form the propping agent.

TOOLING INSERTS FOR CERAMIC MATRIX COMPOSITES

The disclosure describes a system that includes a controller configured to receive a representation of a three-dimensional geometry of a preform, determine a set of dimensions of the preform from the representation of the preform, and determine dimensions of at least one insert for a fixed tooling based on a dimensional tolerance of the preform, the set of dimensions of the preform, and dimensions of the fixed tooling. 1. A method comprising:determining, by a controller, a set of dimensions of a preform from a representation of a three-dimensional geometry of the preform;determining, by the controller, dimensions of at least one insert for a fixed tooling based on a dimensional tolerance of the preform, the set of dimensions of the preform, and dimensions of the fixed tooling; andmanufacturing the at least one insert based on the determined dimensions.2. The method of claim 1 , further comprising:positioning the at least one insert in the fixed tooling;positioning the preform within the fixed tooling to contact the at least one insert;infiltrating the preform with a slurry to form an infiltrated preform; anddrying the infiltrated preform to form a greenbody preform.3. The method of claim 1 , wherein the at least one insert comprises at least one adaptive standoff configured to contact more than one surface of the preform.4. The method of claim 1 , wherein the at least on insert comprises at least one fixed shim and the fixed tooling comprises structures configured to house the at least one fixed shim.5. The method of claim 1 , wherein the fixed tooling comprises a textured interior surface.6. A method comprising:determining, by a controller, a set of dimensions of a preform from a representation of a three-dimensional geometry of the preform;determining, by the controller, dimensions of at least one insert for a fixed tooling based on a dimensional tolerance of the preform, the set of dimensions of the preform, and dimensions of the fixed tooling; andoutputting, by ...

PROTECTIVE LAYER FOR A CERAMIC MATRIX COMPOSITE ARTICLE

A method including infiltrating a porous fiber preform with a slurry including a carrier fluid and a first plurality of solid particles wherein the first plurality of solid particles includes at least a first ceramic material, drying the slurry to form a greenbody preform, machining the greenbody preform to a target dimension, depositing a protective layer precursor including a second plurality of solid particles on the machined greenbody preform wherein the second plurality of solid particles includes at least a second ceramic material, and infiltrating the machined greenbody preform with a molten infiltrant to form a composite article including an integral protective layer. 1. A method comprising:infiltrating a porous fiber preform with a slurry comprising a carrier fluid and a first plurality of solid particles, wherein the first plurality of solid particles comprises at least a first ceramic material;drying the slurry to form a greenbody preform;after drying the slurry, machining the greenbody preform to a target dimension;after machining the greenbody preform, depositing a protective layer precursor comprising a second plurality of solid particles on the machined greenbody preform, wherein the second plurality of solid particles comprises at least a second ceramic material; andinfiltrating the machined greenbody preform with a molten infiltrant to form a composite article including an integral protective layer.2. The method of claim 1 , wherein the second plurality of solid particles comprises a plurality of fine ceramic particles defining a fine particle average size claim 1 , a plurality of coarse ceramic particles defining a coarse particle average size claim 1 , and a plurality of carbon particles claim 1 , wherein the fine particle average size is less than the coarse particle average size.3. The method of claim 1 , wherein the first plurality of solid particles is different than the second plurality of solid particles.4. The method of claim 1 , wherein ...

CERAMIC HEATER AND METHOD FOR PRODUCING THE SAME

An electrostatic chuck includes a disc-shaped alumina ceramic base , and a heater electrode and an electrostatic electrode that are embedded in the alumina ceramic base . An upper surface of the alumina ceramic base functions as a wafer-receiving surface . The heater electrode is formed in a pattern shape, for example, in the manner of a single brush stroke so as to be arranged over the entire surface of the alumina ceramic base . When a voltage is applied to the heater electrode , the heater electrode generates heat, and heats a wafer W. This heater electrode contains TiSias a main component. 1. A ceramic heater comprising a ceramic base and a heater electrode embedded in the ceramic base ,{'sub': '2', 'wherein the heater electrode contains TiSias a main component and a material the same as the ceramic base.'}2. The ceramic heater according to claim 1 ,wherein the ceramic base is composed of alumina containing magnesium fluoride.3. A method for producing a ceramic heater comprising the steps of:(a) preparing each of a first ceramic molded body and a second ceramic molded body by pouring, into a molding die, a slurry containing an alumina powder, magnesium fluoride serving as a sintering aid, a solvent, a dispersant, and a gelling agent, causing gelation of the slurry by chemically reacting the gelling agent in the molding die, and then removing the molding die;(b) obtaining a first ceramic calcined body and a second ceramic calcined body by drying, then degreasing, and further calcining the first ceramic molded body and the second ceramic molded body;{'sub': '2', '(c) printing a paste prepared by adding an alumina powder to a TiSipowder on a surface of one of the first ceramic calcined body and the second ceramic calcined body; and'}(d) conducting hot-press firing at 1,120° C. to 1,300° C. in a state where the first ceramic calcined body and the second ceramic calcined body are overlapped with each other so as to sandwich the printed paste therebetween.4. A method ...

Process for Producing a Silicon Carbide-Containing Body

The present invention relates to a process for producing a silicon carbide-containing body ( 100 ), characterized in that the process has the following process steps: a) providing a mixture ( 16 ) comprising a silicon source and a carbon source, the silicon source and the carbon source being present together in particles of a solid granular material; b) arranging a layer of the mixture ( 16 ) provided in process step a) on a carrier ( 12 ), the layer of the mixture ( 16 ) having a predefined thickness; and c) treating the mixture ( 16 ) arranged in process step b) over a locally limited area with a temperature within a range from ≥1400° C. to ≤2000° C. according to a predetermined three-dimensional pattern, the predetermined three-dimensional pattern being selected on the basis of the three-dimensional configuration of the body ( 100 ) to be produced. Such a process allows simple and inexpensive production even of complex structures from silicon carbide.

Graphene sheets and methods for making the same

The invention relates to graphene sheets and to a method for making the same in which a solution of graphene or graphite oxide is applied to a blue steel substrate and dried.

Method of making a ceramic composite material by cold sintering

Ceramic composite materials, devices and methods are shown. In selected examples, ceramic materials are processed at low temperatures that permit incorporation of low temperature components, such as polymer components. manufacturing methods include, but are not limited to, injection molding, autoclaving and calendaring.

COMPOSITE FORMED OF CUBIC BORON NITRIDE WITHOUT TI-BASED CERAMIDE AND METHOD OF MAKING THEREOF

A cubic boron nitride (cBN)-based composite including about 30-65 vol. % cBN, about 3-30 vol. % zirconium (Zr)-containing compounds, about 0-10 vol. % cobalt-tungsten-borides (CoWB), about 2-30 vol. % aluminum oxide (AlO), about 0.5-10 vol. % tungsten borides, and less than or equal to about 5 vol. % aluminum nitride (AlN). 1. A cubic boron nitride (cBN)-based composite , comprising:about 30-65 vol. % cBN;about 3-30 vol. % zirconium (Zr)-containing compounds;{'sub': x', 'y', 'z, 'about 0-10 vol. % cobalt-tungsten-borides (CoWB);'}{'sub': 2', '3, 'about 2-30 vol. % aluminum oxide (AlO);'}about 0.5-10 vol. % tungsten borides; andless than or equal to about 5 vol. % aluminum nitride (AlN).2. The cBN-based composite of claim 1 , comprising about 45-55 vol. % cBN claim 1 , about 8-15 vol. % Zr-containing compounds claim 1 , about 3-8 vol. % CoWB claim 1 , about 5-25 vol. % AlO claim 1 , about 3-8 vol. % tungsten borides claim 1 , and less than 1 vol. % AlN.3. The cBN-based composite of excludes Ti-containing compounds.4. The cBN-based composite of claim 1 , wherein the tungsten borides comprise WB claim 1 , WB claim 1 , WB claim 1 , or a combination thereof.5. The cBN-based composite of claim 1 , wherein the CoWBcomprises crystalline CoWB claim 1 , crystalline CoWB claim 1 , crystalline CoWB claim 1 , or a combination thereof.6. The cBN-based composite of claim 1 , wherein the CoWBexcludes WCoB.7. The cBN-based composite of excludes aluminum nitride (AlN) claim 1 , aluminum diboride (AlB) claim 1 , or both.8. The cBN-based composite of claim 1 , wherein the Zr-containing compounds comprise zirconium nitride (ZrN) claim 1 , zirconium carbide (ZrC) claim 1 , zirconium carbo-nitride (ZrCN) claim 1 , zirconium diboride (ZrB) claim 1 , zirconium dioxide (ZrO) claim 1 , or a combination thereof.9. A cutting tool for cutting superalloys comprising Inconel 718 claim 1 , Inconel 625 claim 1 , alloy 188 claim 1 , Haynes 25 claim 1 , Alloy L605 claim 1 , and/or A 286 claim 1 , ...

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.

LAMINATION-SHAPED FIRED BODY, METHOD FOR PRODUCING LAMINATION-SHAPED FIRED BODY, AND KIT FOR PRODUCING LAMINATION-SHAPED FIRED BODY

The present invention provides a method for producing a lamination-shaped fired body. This production method includes a shaping step (S) of shaping a lamination-shaped article by using a lamination shaping powder that contains non-hydrating reaction raw material particles, an impregnation step (S) of impregnating the lamination-shaped article with a coupling liquid that contains a coupling agent, and a firing step (S) of firing the lamination-shaped article so as to obtain a lamination-shaped fired body, implemented following the impregnation step. 1. A method for producing a lamination-shaped fired body , the method comprising:a shaping step of shaping a lamination-shaped article by using a lamination shaping powder that contains non-hydrating reaction raw material particles;an impregnation step of impregnating the lamination-shaped article with a coupling liquid that contains a coupling agent; anda firing step of firing the lamination-shaped article so as to obtain a lamination-shaped fired body, implemented following the impregnation step.2. The method for producing a lamination-shaped fired body according to claim 1 , wherein the coupling agent contains at least one element selected from the group consisting of Si claim 1 , Ti claim 1 , Al and Zr.3. The method for producing a lamination-shaped fired body according to claim 1 , wherein the non-hydrating reaction raw material particles are constituted mainly from a metal containing at least one element selected from the group consisting of Al claim 1 , Zr claim 1 , Ti claim 1 , Zn claim 1 , Ni and Fe or an alloy thereof.4. The method for producing a lamination-shaped fired body according to claim 1 , wherein the non-hydrating reaction raw material particles are constituted mainly from an oxide containing at least one element selected from the group consisting of Al claim 1 , Zr claim 1 , Ti claim 1 , Zn claim 1 , Ni claim 1 , Fe and Si.5. The method for producing a lamination-shaped fired body according to claim 1 ...

Method for manufacturing aluminum-titanate-based ceramic honeycomb structure

A method for manufacturing a ceramic honeycomb structure includes kneading titania particles, alumina particles and binder ingredient such that raw material paste including the titania particles, alumina particles and binder ingredient is prepared, forming a body made of the raw material paste and having a honeycomb structure such that the body has the honeycomb structure having through-holes extending in the longitudinal direction of the body and partition portions between the through-holes, positioning the body on a base such that one end surface of the body in the longitudinal direction faces the base and a space is formed between the base and the end surface of the body, and sintering under oxygen atmosphere the body on the base with the space between the base and the body such that a ceramic body having the honeycomb structure is formed on the base.

ELECTROSTATIC CHUCK

One embodiment of the present invention discloses an electrostatic chuck made of an aluminum nitride sintered body, wherein the aluminum nitride sintered body comprises aluminum nitride and a composite oxide formed along the grain boundaries of the aluminum nitride, wherein the composite oxide comprises at least two kinds of rare earth metals which have a solid-solution relationship with each other, and wherein the composite oxide comprises a collection area having a higher oxygen content than a surrounding area. 1. An electrostatic chuck made of an aluminum nitride sintered body ,wherein the aluminum nitride sintered body comprises aluminum nitride and a composite oxide formed along the grain boundaries of the aluminum nitride,wherein the composite oxide comprises at least two kinds of rare earth metals which have a solid-solution relationship with each other,wherein the composite oxide comprises a collection area having a higher oxygen content than a surrounding area, andwherein the composite oxide is a nanocomposite oxide formed by a composite oxide powder having a nano size.2. The electrostatic chuck according to claim 1 , wherein the composite oxide is included in the aluminum nitride sintered body at 0.2 wt % to 20 wt %.3. The electrostatic chuck according to claim 1 , wherein a volume resistivity of the aluminum nitride sintered body is 1×10Ω·cm to 1×10Ω·cm.4. The electrostatic chuck according to claim 1 , wherein a crystal peak of the composite oxide is different from crystal peaks of the oxides of each of the at least two kinds of rare earth metals.5. The electrostatic chuck according to claim 1 , wherein the aluminum nitride sintered body further comprises titanium nitride (TiN) at the grain boundaries of the aluminum nitride.6. The electrostatic chuck according to claim 5 , wherein the titanium nitride (TiN) is included in the aluminum nitride sintered body at 1 wt % to 5 wt %.7. The electrostatic chuck according to claim 1 , wherein the at least two ...

Wavelength converter, light-emitting device using same, and production method for wavelength converter

A wavelength converter is provided with a light-transmitting substrate and with a thin film that is formed on a surface of the light-transmitting substrate and that contains a phosphor. A sintered body that constitutes the light-transmitting substrate has an average particle size of 5-40 μm. The light-transmitting substrate contains at least 10-500 ppm by mass of MgO. The principal component of the phosphor is an α-sialon that is indicated by the general formula (Ca α ,Eu β ) (Si,Al) 12 (O,N) 16 (provided that 1.5<α+β<2.2, 0<β<0.2, and O/N≦0.04).

MANUFACTURING METHOD FOR CERAMIC MATRIX COMPOSITE

A manufacturing method for a ceramic matrix composite, having a woven fabric that has multiple fiber bundles and having a matrix that is disposed in the gaps between the fiber bundles, includes: a green body formation step for forming a green body by sintering the woven fabric infiltrated with a polymer that is a precursor to the matrix; and a densification step for further infiltrating the green body with a polymer and sintering same. The densification step includes: a second infiltration step for further infiltrating the green body with a polymer so as to form an infiltrated green body; a drying step for drying the infiltrated green body so as to form a dried green body; a steam treatment step for leaving the dried green body under saturation water vapor pressure so as to form a treated green body; and a sintering step for sintering the treated green body. 1. A manufacturing method for a ceramic matrix composite having a woven fabric that has a plurality of fiber bundles and a matrix that is disposed in a gap between the fiber bundles , the method comprising:a green body formation step of forming a green body by infiltrating the woven fabric with a polymer as a precursor of the matrix and performing sintering; anda densification step of further infiltrating the green body with the polymer and performing sintering, an infiltration step of further infiltrating the green body with the polymer to form an infiltrated green body,', 'a drying step of drying the infiltrated green body to form a dried green body,', 'a steam treatment step of leaving the dried green body under a saturation water vapor pressure to form a treated green body, and', 'a sintering step of sintering the treated green body., 'wherein the densification step includes'}2. The manufacturing method for a ceramic matrix composite according to claim 1 ,wherein after the steam treatment step, the infiltration step, the drying step, and the steam treatment step are repeated, andin the sintering step, the ...

METHODS FOR FORMING A UNITIZED CRUCIBLE ASSEMBLY

Methods for forming a unitized crucible assembly for holding a melt of silicon for forming a silicon ingot are disclosed. In some embodiments, the methods involve a porous crucible mold having a channel network with a bottom channel, an outer sidewall channel that extends from the bottom channel, and a central weir channel that extends from the bottom channel. A slip slurry may be added to the channel network and the liquid carrier of the slip slurry may be drawn into the mold. The resulting green body may be sintered to form the crucible assembly. 1. A method for forming a unitized crucible assembly for holding a melt of silicon for forming a silicon ingot by the Czochralski method , the method comprising: a bottom channel;', 'an outer sidewall channel that extends from the bottom channel;', 'a central weir channel that extends from the bottom channel; and', 'an inner weir channel that extends from the bottom channel, the central weir channel being disposed between the outer sidewall channel and the inner weir channel;, 'providing a crucible mold, the mold having a channel network comprisingintroducing a slip slurry into the channel network to fill the bottom channel, outer sidewall channel, central weir channel, and inner weir channel with the slip slurry, the slip slurry comprising silica and a liquid carrier;removing at least a portion of the liquid carrier from the channel network to form a green body;separating the green body from the crucible mold; andsintering the green body to dry and densify the green body to form the unitized crucible assembly.2. The method as set forth in wherein the mold comprises a porous body and draws the liquid carrier into the mold by capillary action.3. The method as set forth in wherein the porous body is made of porous silica.4. The method as set forth in wherein a moisture content of the green body is less than about 50 wt %.5. The method as set forth in wherein the green body is sintered at a temperature from about 1200° C. to ...