Способ получения нанотрубок нитрида бора

Изобретение относится к технологии получения керамических наноматериалов, а именно дискретных нанотрубок нитрида бора, применяющихся в качестве упрочняющей фазы для полимерных и металлических матриц. Способ включает приготовление реакционной смеси из бороксидного соединения и катализатора, термообработку реакционной смеси в аммиаке при температуре 950°С-1200°С в течение 1 часа, выделение нанотрубок из продуктов реакции, промывку и сушку, при этом реакционная смесь состоит из бороксидного соединения и катализатора, взятых в пропорции, обеспечивающей соотношение катионов в диапазоне В/Ме=1-7, где Me = Li, Mg, Са, Sr, в качестве катализатора используют гидроксид или карбонат лития, магния, кальция, или стронция, а в качестве бороксидного соединения используют борную кислоту или борат аммония, причем реакционную смесь наносят в виде слоя толщиной от 0,1 до 1 мм на замкнутую ленту из низкоуглеродистой стали или тонкой сетки, которую пропускают через печь с атмосферой аммиака. Изобретение позволяет ...

АБРАЗИВ ВЫСОКОТЕМПЕРАТУРНОГО СВЯЗЫВАНИЯ (ВАРИАНТЫ) И СПОСОБ ЕГО ПОЛУЧЕНИЯ

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

НАБИВНАЯ ПАСТА ВЫСОКОЙ НАБУХАЮЩЕЙ СПОСОБНОСТИ ДЛЯ ЭЛЕКТРОЛИЗЕРА АЛЮМИНИЯ

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

ПРОППАНТ И СПОСОБ ЕГО ПРОИЗВОДСТВА

... 1. Проппант, включающий в себя совокупность двух составляющих, состав одной из составляющих содержит одну или несколько фаз из следующих возможных, принадлежащих системе Al2O3-В2О3: химические соединения, твердые растворы, эвтектические смеси, состав второй составляющей содержит одну или несколько фаз из следующих возможных, принадлежащих системе Al2O3-В2О3-SiO2: тройные и четверные химические соединения, твердые растворы, эвтектические смеси. 2. Проппант, содержащий одну или несколько фаз из следующих возможных, принадлежащих системе Al2O3 - В2O3: химические соединения, твердые растворы, эвтектические смеси. 3. Проппант, содержащий одну или несколько фаз из следующих возможных, принадлежащих системе Al2O3-В2 O3-SiO2: тройные и четверные химические соединения, твердые растворы, эвтектические смеси. 4. Способ изготовления проппанта, включающий как отдельное, так и совместное измельчение и смешение алюмо- и борсодержащих исходных компонентов, грануляцию сухим или мокрым способом, сушку и ...

СПЕЧЕННЫЙ ОГНЕУПОРНЫЙ БЛОК НА ОСНОВЕ КАРБИДА КРЕМНИЯ СО СВЯЗКОЙ ИЗ НИТРИДА КРЕМНИЯ

... 1. Огнеупорный блок на основе карбида кремния (SiC), реакционно спеченный при температуре от 1100 до 1700°С с образованием связки из нитрида кремния (Si3N4), предназначенный, в частности, для изготовления ячейки для электролиза алюминия, отличающийся тем, что он содержит от 0,05% до 1,5% бора, а массовое отношение Si3N4/SiC составляет от 0,05 до 0,45. 2. Спеченный огнеупорный блок по п.1, отличающийся тем, что содержание бора составляет от 0,05% до 1,2 мас.%. 3. Спеченный огнеупорный блок по п.1, отличающийся тем, что массовое отношение Si3N4/SiC составляет от 0,1 до 0,2. 4. Спеченный огнеупорный блок по п.1, отличающийся тем, что нитрид кремния (Si3N4) в форме бета составляет по меньшей мере 40 мас.% от общего количества нитрида кремния (Si3N4) в форме бета и в форме альфа. 5. Спеченный огнеупорный блок по п.4, отличающийся тем, что нитрид кремния (Si3N4) в форме бета составляет по меньшей мере 80 мас.% от общего количества нитрида кремния (Si3N4) в форме бета и в форме альфа. 6. Спеченный ...

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.

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

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

МАТЕРИАЛ ДЛЯ ГАЗИФИКАТОРА НА ОСНОВЕ ОКСИДОВ АЛЮМИНИЯ И МАГНИЯ

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

Flüssigkeitsphasensinterprozess für Aluminat-Keramiken

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

VERFAHREN ZUR HERSTELLUNG HÖCHSTREAKTIVER SUBMIKRON AMORPHER TITANDIBORIDPULVER UND ERZEUGNISSE DARAUS.

Zinkoxid-Sinterkörper und Verfahren zur Herstellung desselben

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

Aluminiumnitridwerkstoffe für Anwendungen im Metallguss

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

New spinnable mass, obtained by reacting aluminum triacylate with carbonic acid and mixing with silicon dioxide containing solution, useful for preparing green fibers and/or ceramic fibers based on aluminum oxide

Spinnable mass (I) (obtained by reacting aluminum triacylate with carbonic acid, which can displace the acylate group of the aluminum triacylate, to form solution or suspension and mixing the solution or suspension with silicon dioxide containing sol or gel as far as the fibers should contain silicon dioxide), for preparing green fibers and/or ceramic fibers based on aluminum oxide or aluminum oxide-silicon dioxide, is new. An independent claim is also included for the preparation of (I).

PORZELLANZUSAMMENSETZUNG

Seitenplatte für das Dünnbandgießen von Stahl

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

Dielectric material and capacitor comprising the dielectric material

A dielectric material suitable for use in an electronic component includes bismuth ferrite (BiFeO3); strontium titanate (SrTiO3) and an additive of barium titanate (BaTiO3). The barium titanate reduces the temperature capacitance change of the dielectric material and allows for increased working voltages. The material is useful for the construction of capacitors, and particularly capacitors intended for use at high temperatures. Also provided are a capacitor including the dielectric material, methods of manufacturing the dielectric material and the capacitor, and the use of an additive to improve the lifetime and/or reduce the dissipation factor of a capacitor. The capacitor 100 comprises a first electrode 12, a second electrode 14 and a capacitive layer 16 of the dielectric material. The dielectric material can be formed into the capacitive layer 16 by sintering a powder or sintering a slurry containing the powder.

Cubic boron nitride grit and tools comprising same

Creating layers in thin-film structures

A method of agglomeration

A method of agglomeration

A method of agglomeration

A method of agglomeration

IMPROVED MULLIT BODIES AND PROCEDURE FOR YOUR PRODUCTION

FIREPROOF PRODUCT

SILICON COMPOSITIONS

ELECTRONIC EQUIPMENT, DIELECTRIC CERAMIC COMPOSITION AND PROCEDURE FOR THE PRODUCTION

PRODUCTION OF AN ELECTRICALLY LEADING ARTICLE FROM CARBORUNDUM

MULTILEVEL OPTICAL STRUCTURES

FIREPROOF FUSION INGOT WITH HIGH ZIRCON CIRCUMVENTION ALTO

DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC DEVICE

DIELECTRIC CERAMIC COMPOSITION WITH DIELECTRIC NUCLEAR COVERING PARTICLES AND ELECTRONIC EQUIPMENT

FERRITE-CERAMIC VERBUNDPULVER AND PROCEDURE FOR ITS PRODUCTION.

BY RARE RD ELEMENTS ACTIVATE-CASH PHOTO LUMINESCENCE PIGMENT OUT ERDALKALIALUMINATSILICAT

PROCEDURE FOR THE PRODUCTION FROM CERAMIC(S) BALLS TO THE WATER TREATMENT

CINDER LINE SEAL FOR NOZZLE WITH SUBMERGED ENTRANCE AND COMPOSITION FOR IT

Plasticizable mixture and method of using

CREATING LAYERS IN THIN-FILM STRUCTURES

Refractory material with doped zirconia content

Sintered refractory block based on silicon carbide with a silicon nitride bond

Boron-containing compositions for use in clay body, e.g. brick, manufacture

CRACK-RESISTANT DRY REFRACTORY

Biosoluble inorganic fiber and method for producing same

An inorganic fiber which comprises a biosoluble fiber and a cationic surfactant adhering thereto, wherein the amount of the surfactant is 0.01-2 wt%, taking the whole inorganic fiber carrying the surfactant adhered thereto as 100 wt%.

Cast bodies, castable compositions, and methods for their production

Slagline sleeve for submerged entry nozzle and composition therefor

REFRACTORY PRODUCT HAVING HIGH ZIRCONIA CONTENT

La présente invention concerne un produit réfractaire fondu et coulé comportant, en pourcentages massiques sur la base des oxydes et pour un total de 100 % des oxydes : ZrO2 + Hf2O : complément à 100 % 4,5 % < SiO2 < 6,0 % Ai2O3 < 0,80 % 0,3 % < B2O3 < 1,0 % Ta2O5 + Nb2O5 < 0,15 % Na2O + K2O < 0,1 % K2O < 0,04 % CaO + SrO + MgO + ZnO + BaO < 0,4 % P2O6 < 0,05 % Fe2O3 + TiO2 < 0,55 % autres espèces oxydes, y compris optionneilement Y2O3 : < 1,5 %, avec Y2O3 < 0,3 % ie rapport « A/B » des teneurs massiques AI2O3 / B2O3 étant compris entre 0,5 et 2,0. Application aux fours de fusion de verre.

METAL CARBIDES AND PROCESS FOR PRODUCING SAME

WETTABLE AND EROSION/OXIDATION-RESISTANT CARBON-COMPOSITE MATERIALS

The process comprises mixing together finely divided quantities of TiO2 and B2O3 (or other metal boride precursors) to produce a precursor mixture, and then mixing the precursor mixture with at least one carbon-containing component to produce a carbon composite material that forms TiB2 (or other metal boride) in situ when exposed to molten aluminum or subjected to the heat of cell start-up and operation. The invention also relates to the carbon composite materials thus produced that may be used to form blocks (including side wall blocks) for the construction of cathode structures (or coatings for such blocks) or may be used to prepare joint-filling and coating compositions for use in aluminum reduction cells, or protective coatings for instruments used with molten metals.

PROCESS FOR MANUFACTURING CARBON ANODES FOR ALUMINIUM PRODUCTION CELLS AND CARBON ANODES OBTAINED FROM THE SAME

There is provided a process for manufacturing a carbonaceous anode for an electrolysis cell for the production of aluminium. The process comprises contacting coke particles with a boron-containing solution to obtain boron-impregnated coke particles, mixing the boron- impregnated coke particles with coal tar pitch to form an anode paste, and forming a green anode with the anode paste. A carbonaceous anode for an electrolysis cell for the production of aluminium is also provided, which comprises at least a first fraction of coke particle, a second fraction of coke particles and coal tar pitch, wherein at least the first faction of coke particles comprises boron-impregnated coke particles, the boron- impregnated coke particles being distributed throughout the carbonaceous anode. The carbonaceous anode presents good resistivity towards air and CO2 oxidation, which translates into less dusting of the anode, thus improving its integrity throughout its lifetime.

COMPOSITIONS FOR EROSION AND MOLTEN DUST RESISTANT ENVIRONMENTAL BARRIER COATINGS

Coating systems are provided for positioning on a surface of a substrate, along with the resulting coated components and methods of their formation. The coating system may include a layer having a compound of the formula: Al-b B b Z1-d D d MO6 where: A is Al, Ga, In, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Fe, Cr, Co, Mn, Bi, or a mixture thereof; b is 0 to about 0.5; Z is Hf, Ti, or a mixture thereof; D is Zr, Ce, Ge, Si, or a mixture thereof; d is 0 to about 0.5; and M is Ta, Nb, or a mixture thereof.

HIGH SWELLING RAMMING PASTE FOR ALUMINUM ELECTROLYSIS CELL

A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.

METAL OXIDE FIBERS AND NANOFIBERS, METHOD FOR MAKING SAME, AND USES THEREOF

The present invention generally relates to metal oxide fibers and nanofib ers, the processes for making same, and uses thereof. Such metal oxide nanof ibers possess the ability to absorb and decompose chemical warfare agents an d other toxic chemicals. These nanofibers can be incorporated into protectiv e clothing and devices for breathing or in another example may be used in li thium-ion batteries. In one embodiment, the present invention relates to tit ania, alumina, and/or magnesia fibers and nanofibers, and to processes for m aking same. In another instance, alpha-phase aluminum oxide is utilized as o ne material in nanofibers.

POLYDISILAZANES PREPARED FROM BORON-CONTAINING ADDITIVES

The present disclosure generally relates to methods of using boron- containing additives for crosslinking polysilazane green fibers, which are precursors to silicon carbide fibers. These methods provide a controllable process for crosslinking silicon carbide fibers while providing a simple way for the introduction of boron as a sintering aid into the polymer structure.

CARBON COMPOSITES AND METHODS OF MANUFACTURE

A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350°C to about 1200°C and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof; wherein the nonmetal is selected from the group consisting of SiO2, Si, B, B2O3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

SELF-TOUGHENED HIGH-STRENGTH PROPPANT AND METHODS OF MAKING SAME

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

THE BONDING OF BODIES OF REFRACTORY HARD MATERIALS TO CARBONACEOUS SUPPORTS

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

PROCEDURE FOR MANUFACTURING ARTICLES FROM GLASS CERAMIC AND IN THIS PROCEDURE MANUFACTURED ARTICLES.

Fireproof and heatproof material.

Ein feuerfestes und hitzebeständiges Material umfasst einen Anteil an Wachs, einen Anteil an Wasser (H 2 O), einen Anteil an Pottasche (K 2 CO 3 ), und einen Anteil wenigstens eines Wasserglases, insbesondere Kaliumwasserglas. Das Wasserglas kann entweder als Feststoff (gemahlenes Pulver) oder als mehr oder weniger zähflüssige Lösung hinzugegeben werden. Ausserdem wird ein Werkstoff zum Einsatz als Baumaterial, als Konstruktionswerkstoff für technische Komponenten, als Beschichtungsmaterial oder Verpackungsmaterial, etc., vorgeschlagen, der wenigstens einen Anteil an einem Trägermaterial und wenigstens einen Anteil an dem feuerfesten und hitzebeständigen Material wie oben beschrieben umfasst. Das Trägermaterial kann ein Trägerobjekt oder -element sein, das beispielsweise mit dem feuerfesten und hitzebeständigen Material besprüht, angestrichen oder auf sonstige Weise beschichtet oder imprägniert wird. Das Material kann jedoch auch als Binder zwischen einem Trägermaterial, das als Granulat ...

REFRACTORY ARTICLE WITH HIGH ZIRCONIUM DIOXIDE CONTENT

REFRACTORY PRODUCT WITH HIGH CONTENT OF ZIRCONIUM DIOXIDE

biokeramicheskie composition

ОГНЕУПОРНОЕ ИЗДЕЛИЕ С ВЫСОКИМ СОДЕРЖАНИЕМ ДИОКСИДА ЦИРКОНИЯ

Настоящее изобретение относится к плавленому и литому изделию, включающему в мас.% в расчете на оксиды и в общем 100% причем изделие содержит добавку, выбранную из Nb2O5, Ta2O5 и их смесей, в количестве 1,0 мас.% или менее, а также соотношение А/В массовых содержаний Al2O3/B2O3 составляет 2,0 или менее, за исключением плавленых и литых изделий в виде блоков 220×450×150 мм3 или цилиндрических брусков диаметром 30 мм и высотой 30 мм, обладающих следующим химическим составом в мас.% в расчете на оксиды: Изобретение может применяться в стеклоплавильных печах.

ОГНЕУПОРНЫЙ ПРОДУКТ С ВЫСОКИМ СОДЕРЖАНИЕМ ДИОКСИДА ЦИРКОНИЯ И ВЫСОКИМ СОДЕРЖАНИЕМ ДИОКСИДА КРЕМНИЯ, СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ И СТЕКЛОВАРЕННАЯ ПЕЧЬ, СОДЕРЖАЩАЯ ЕГО

Литой огнеупорный продукт с высоким содержанием диоксида циркония, имеющий улучшенное удельное электрическое сопротивление и содержащий в массовых процентах на основе оксидов и в общем более, чем 98,5 %: •ZrO2 + Hf2O: > 85 %, • SiO2: > 10-12 %, • Al2О3: 0,1-2,4 %, • В2О3: < 1,5 %, и • легирующую добавку, выбранную из группы, в которую входят V2O5, CrO3, Nb2O5, MoO3, Та2О5, WO3 и их смеси, в массовом количестве, как это выражено ниже: 2,43V2O5 + 4,42CrO3 + 1,66Nb2O5 + 3,07МоО3 + Та2О5 + 1,91WO3 ≥ 0,2 %, где количества оксидов выражены в массовых процентах. Способ изготовления огнеупорного продукта, содержащего указанные выше компоненты, и стекловаренная печь, содержащая указанный огнеупорный продукт.

СПЕКШИЙСЯ ПРОДУКТ, ПОЛУЧЕННЫЙ ИЗ ШИХТЫ НА ОСНОВЕ ЦИРКОНА

Данное изобретение относится к спекшемуся продукту, который получают из исходной шихты с содержанием 80-99 мас. % циркона, выходя из оксидов, и который имеет следующий средневесовой химический состав, мас. %, исходя из оксидов 60,0 ≤ ZrO2 ≤72,8, 27,0 ≤SiO2 ≤36,0, 0,1 ≤ В2О3+GeO2 + Р2О5+Sb2O3+Nb2O5 + Та2О5+V2O5 ≤ 4,9, 0,1 ≤ZnO+PbO+CdO ≤ 4,9, 0,2 ≤ В2О3+GeO2 + Р2О5+Sb2O3+Nb2O5+Ta2O5+V2O5+ZnO+PbO+CdO ≤ 5,0, 0 < Al2 O3+TiO2+MgO+Fe2O3+NiO+MnO2+CoO+CuO ≤ 5 %, другие оксиды < 1,5 до общего объема 100,0. Преобладающее использование – в стеклоплавильной печи.

РАСКЛИНИВАЮЩИЙ АГЕНТ ДЛЯ ГАЗОВЫХ И НЕФТЯНЫХ СКВАЖИН И СПОСОБ ТРЕЩИНООБРАЗОВАНИЯ ПОДЗЕМНОЙ ФОРМАЦИИ

В изобретении предлагаются спеченные, сферические композитные гранулы или частицы, которые содержат тонкоизмельченный оксид алюминия, по меньшей мере один материал, выбранный из группы, в которую входят глина и боксит, и, возможно, спекающая добавка, а также описан способ их приготовления. Описано также использование таких гранул для гидравлического расклинивания подземных формаций и для операций шлифования.

ЛИТОЙ ОГНЕУПОРНЫЙ ПРОДУКТ С ВЫСОКИМ СОДЕРЖАНИЕМ ДИОКСИДА ЦИРКОНИЯ И СТЕКЛОВАРЕННАЯ ПЕЧЬ, СОДЕРЖАЩАЯ ЕГО

Изобретение раскрывает литой огнеупорный продукт с высоким содержанием диоксида циркония, содержащий в массовых процентах на основе оксидов: - ZrO2 + Hf2O: > 85 %; - SiO2: 6 % - 12 %; - Al2O3: 0,4 % - 1 %; - Y2O3: < 0,2 %; - легирующую добавку, выбранную из группы, в которую входят Nb2O5, Та2О5 и их смеси, в таком количестве, что молярное соотношение ZrO2/(Nb2O5+Та2О5) составляет 200-350.

Высокотемпературный абразив со связкой (варианты) и способ его формирования

Высокотемпературный абразив со связкой содержит абразивные зерна оксида алюминия и стекловидную связывающую матрицу, в которой распределены абразивные зерна оксида алюминия, причем стекловидная связующая матрица имеет температуру отверждения не менее 1000 °С. Абразивные зерна оксида алюминия содержат поликристаллический альфа-оксид алюминия, имеющий тонкую кристаллическую микроструктуру, которая характеризуется средним размером доменов альфа-оксида алюминия не более 500 нм, и абразивные зерна оксида алюминия, кроме того, содержат агент, создающий центры пиннинга, который является фазой, диспергированной в поликристаллическом альфа-оксиде алюминия.

REFRACTORY BLOCK AND GLASSMAKING FURNACE

SYSTEM AND METHODS FOR PREPARING CERAMIC POWDERS

REFRACTORY MAGNESIA CEMENT

Phosphor, production method thereof and light emitting instrument

The present invention aims at providing a blue-aimed phosphor powder which is more excellent in emission characteristic than the conventional rare-earth activated sialon phosphors and which is more excellent in durability than the conventional oxide phosphors. The solving means resides in: firing a starting material mixture in a nitrogen atmosphere at a temperature range between 1,500 DEG C inclusive and 2,200 DEG C inclusive, wherein the starting material mixture is a mixture of metallic compounds, and is capable of constituting a composition comprising M, A, Si, Al, O, and N (M is one kind or two or more kinds of element(s) selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb; and A is one kind or two or more kinds of element(s) selected from C, Si, Ge, Sn, B, Ga, In, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, Lu, Ti, Zr, Hf, Ta, and W) by firing; to obtain a phosphor which emits fluorescence having a peak at a wavelength within a range of 400nm to 700nm, by irradiation of an excitation source ...

Method for producing aluminum titanate ceramic sintered body, and aluminum titanate ceramic sintered body

METHOD FOR PRODUCING A SEAL FOR A SENSOR ELEMENT OF A SENSOR FOR DETECTING AT LEAST ONE PROPERTY OF A MEASURING GAS IN A MEASURING GAS CHAMBER

Method for making porous acicular mullite bodies

Acicular mullite bodies are made in two-step firing process in which a green body is converted first to a fluorotopaz and then to acicular mullite. The bodies are contained within an enclosed region of the furnace. A flow of process gas is provided through the enclosed region during the fluorotopaz-forming step. The process gas is introduced into the enclosed region through multiple openings on at least one side of the enclosed region, and withdrawn through multiple openings on another side of the enclosed region. During the acicular mullite-forming step, a flow of purge gas is maintained in the exterior portion of the furnace. This purge gas may be removed by flowing it into the enclosed region of the furnace and out of the furnace from the enclosed region without re-entering the exterior portion for the furnace.

Ceramic corundum abrasive with micro flake interlocked structure

MOLDING MATERIALS FOR NON-FERROUS CASTING

Dielectric material and method of producing the same

Magnetic ferrite powder, magnetic ferrite sinter, layered ferrite part, and process for producing layered ferrite part

Sintered particle in the form of ball, useful for treating surface of bottles, comprises composition of e.g. zirconium oxide and hafnium oxide, silicon oxide and aluminum oxide, and crystallized phases of e.g. zircon, mullite and corundum

Particule frittée présentant : - la composition chimique suivante, en pourcentages en masse sur la base des oxydes et pour un total de 100% : 30% ≤ ZrO2+HfO2 ≤ 55%, avec HfO2 ≤ 2 % ; 18% ≤ SiO2 ≤ 35% ; 6% ≤ Al2O3 ≤ 40% ; 0,5% ≤ MgO ≤ 6% ; B2O3 ≤ 5% ; moins de 9,0 % d'autres oxydes, et - les phases cristallisées suivantes, en pourcentages en masse sur la base des phases cristallisées présentes et pour un total de 100% : 32% ≤ zircon ≤ 80% ; 3% ≤ mullite ≤ 15% ; zircone + hafnie, éventuellement stabilisés : ≤ 9% ; 4% ≤ corindon ≤ 37% ; moins de 10 % d'autres phases cristallisées, et - une porosité totale inférieure ou égale à 6%.

REFRACTORY HAS STRONG CONTENT ZIRCONIA HAS GREAT RESISTIVITY

USE OF THE B2O3 IN A CERAMICS SEMICONDUCTRICE TO DECREASE THE LEAKAGE CURRENT BY IT AND TO POSSIBLY STABILIZE THE ELECTRIC PROPERTIES OF THEM

COMPOSITE MATERIAL PROTECTS FROM OXIDATION BY SELF-HEALING MATRIX AND ITS MANUFACTORING PROCESS

GLASSES, VITROCERAMICS AND CERAMICS Of TRANSPARENT ALUMINATES

La présente invention concerne de nouvelles compositions de verres transparents, de vitrocéramiques et de céramiques transparentes ou translucides comprenant au moins 85% massique, par rapport à la composition totale du verre, de la vitrocéramique ou de la céramique, d'une composition de formule I suivante : (M1O)x(M2O)y((M3)2O3)z(Al2O3)100-x-y-z (I) où M1 représente un élément choisi parmi Ba et/ou Sr, et M2 représente un élément choisi parmi Mg ou Ca, et x et y représentent des nombres tels que 30≤ x+y ≤80, et y est compris entre 0 et 10% de x, et M3 représente un élément choisi parmi B, Ga ou In, et z représente un nombre compris entre 0 et 10% de (100-x-y), leur procédé de fabrication et leurs utilisations dans le domaine de l'optique.

PRODUCT SINTERS ADDITIVE CONTAINING ZIRCON

PROCESS FOR THE PREPARATION OF METAL-MATRIX COMPOSITE MATERIALS REINFORCEMENTS OXIDES AND OXIDE METHOD BY A CHF

CERAMIC COMPOSITE MULTILAYER FIBER-MATRIX AND METHOD FOR ITS PREPARATION.

Molten and cast refractory product with a high zircon content and improved electrical resistivity suitable for use in glass melting furnaces producing high quality glass for LCD flat screens

L'invention concerne un nouveau produit réfractaire fondu et coulé à forte teneur en zircone présentant une résistivité électrique amélioré. Ce produit réfractaire, comporte, en pourcentages massiques sur la base des oxydes et pour un total de plus de 98,5 % : - ZrO2 + Hf2O : > 85 % -SiO2: 2%à10% - A|2O3 : 0,1 % à 2,4 % - B2O3 : < 1 %, et - un dopant choisi dans le groupe formé par V2O5 CrO3, Nb2O5, MoO3, Ta2O5, WO3, et leurs mélanges, en une quantité pondérée telle que 0,2 % ≤2,43.V2O5+8,84.CrO3+1,66.Nb2O5+6,14.MoO3+Ta2O5+3,81.WO3 ...

REFRACTORY BLOCK SINTERS CONTAINING SILICON CARBIDE HAS BOND SILICON NITRIDE

Bloc réfractaire fritté à base de carbure de silicium (SiC) à liaison nitrure de silicium (Si3N4), notamment destiné à la fabrication d'une cuve d'électrolyse de l'aluminium, caractérisé en ce qu'il comporte, en pourcentages en poids au moins 0,05% de bore et/ou entre 0,05 et 1,2% de calcium.

GRAINS MOLTEN Of OXIDES INCLUDING/UNDERSTANDING Al, TI, IF AND PRODUCED CERAMIC COMPRISING SUCH GRAINS

Magnetic oxide material

COMPOSITION FOR INSULATING CERAMICS AND INSULATING CERAMICS USING THE SAME

A composition for an insulating ceramic which is prepared by mixing a ceramic powder containing MgAl2 O4 and a glass powder containing a silicon oxide in an amount of 30 to 60 mole % in terms of SiO2 and a magnesium oxide in an amount of 20 to 55 mole % in terms of MgO, characterized in that the ceramic powder further comprises Mg2SiO4 or TiO2. The composition for an insulating ceramic is capable of being sintered at a temperature of 1000 °C or lower and can be sintered together with Au or Cu, and the sintering of the composition provides an insulating ceramic which has a high Q value and is suitable for a ceramic multi-layer substrate to be used in a high frequency region. © KIPO & WIPO 2007 ...

FLUORESCENT LAMP

ELECTRONIC COMPONENT, CAPABLE OF ENHANCING RELIABILITY BY IMPROVING ELECTRIC CHARACTERISTIC

PURPOSE: An electronic component is provided to enhance a temperature characteristic at a thin dielectric layer by improving an electrical characteristic such as a dielectric constant. CONSTITUTION: An electronic component includes a dielectric layer(2). The dielectric layer is made of barium titanate as a main ingredient. A plurality of ceramic grains are used for forming the dielectric layer. A ratio of the ceramic grains having thicknesses of crystal grain boundaries between adjacent ceramic grains of 1 nm or less is 30 percent to 95 percent of the total ceramic grains. In addition, a ratio of the ceramic grains having thicknesses of crystal grain boundaries between adjacent ceramic grains of 0.75 nm or less is 40 percent to 90 percent of the total ceramic grains. © KIPO 2006 ...

INORGANIC FIBRE COMPOSITIONS

Melt formed inorganic fibres are disclosed having the compositions:-AlO 10.2-55.5 mol% KO 12-37.1 mol% SiO 17.7-71.4 mol% BO 0.1-10 mol% in which SiO + AlO + KO >= 77.7 mol% and with the total constituents not exceeding 100mol%. with optionally MgO 0.1-10 mol%.2322232232 COPYRIGHT KIPO & WIPO 2010 ...

DIELECTRIC CERAMIC, PROCESS FOR PRODUCING THE SAME, AND LAMINATED CERAMIC CAPACITOR

This invention provides a dielectric ceramic having a high permittivity of not less than 5500 and good permittivity-temperature characteristics, and a laminated ceramic capacitor that is small in size, has a large capacitance, and has static capacitance-temperature characteristics satisfying X5R characteristics. The dielectric ceramic has a composition comprising a BaTiO3-based or (Ba,Ca)TiO3-based main component and an additive component including a rare earth element and Cu. The composition has a structure comprising crystal grains (21) and grain boundaries (22) occupying the space among the crystal grains (21). The molar ratio of the average concentration of the rare earth element in the grain boundaries (22) to the average concentration of the rare earth element within the crystal grains is less than 2. In the cross section of the dielectric ceramic, for 55 to 85% in number, based on the crystal grains (21), of first crystal grains (21A), the proportion in which the rare earth element ...

aglomerados de nitreto de boro, método de produção e uso dos mesmos

A method for fabricating a ferrite sintered magnet

This invention provides a rotary using a ferrite sintered magnet wherein the ferrite sintered magnet have an M type magneto-plumbite structure which comprises Ca; at least one kind of element selected from among rare-earth element including R element of La, Ba, Fe and Co as the essential element; and a formula as follow: Ca1-x-yRxBayFe2n-zCoz wherein (1-x-y), x, y, z and n represent the content and the molar ratio of Ca, R, Ba and Co element respectively, and it satisfied 0.3 1-x-y 0.65, 0.3 x 0.65, 0.001 y 0.2, 0.03 z 0.65, 4 n 7. And this invention also provides a bonded magnet comprising the abovementioned ferrite iron powder and an adhesive, and a magnetic roller having at least one magnet part comprised by the abovementioned magnet.

Refractory block and glass furnace

Fused refractory product comprising the following chemical composition, as a percentage by weight, based on the oxides and for a total of 100%: ZrO2: 30 - 50%; SiO2: 8 - 16%; Al2O3: complement to 100%; Y2O3 50/ZrO2 and Y2O3 5%; Na2O+K2O+B2O3 0.2% and SiO2/(Na2O+K2O+B2O3) 5 * Y2O3; CaO: 0.5%; Other oxide species: 1.5%.

High-resistance high-zirconia cast refractory material

A high-zirconia cast refractory material which contains 85-95 wt% of ZrO2, 4-12 wt% of SiO2, 0. 1 to less than 0. 8 wt% of Al2O3, less than 0. 04 wt% of Na2O, 0. 01-0. 15 wt% of K2O, 0. 1-1. 5 wt% of B2O3, 0. 01-0. 2 wt% of CaO, less than 0. 4 wt% of BaO, less than 0. 2 wt% of SrO, 0. 05-0. 4 wt% of Y2O3, and 0. 3 wt% or less of Fe2O3 and TiO2 together, but does not substantially contain CuO and P2O5 (less than 0. 01 wt%), such that the molar ratio of the glass-forming oxides (such as SiO2 and B2O3) to the glass-modifying oxides (such as Na2O, K2O, CaO, MgO, SrO, and BaO) is 20-100, said refractory material having an electric resistance being 200 *cm or higher after standing for 12 hours at 1500 DEG C.

Sintered body and amorphous film

This sintered body, which contains zinc (Zn), tin (Sn) and/or indium (In), magnesium (Mg), and oxygen (O), is an oxide sintered body characterized by having a total content of Sn and/or In in terms of SnO2 and/or In2O3 of 10-90 mol%, having an Mg content in terms of MgF2 of 15-50 mol% when the ratio of the number of Sn and/or In atoms to the number of Zn atoms is no greater than 1, and having an Mg content in terms of MgF2 of 1-40 mol% when the ratio of the number of Sn and/or In atoms to the number of Zn atoms is at least 1. The sintered body can form an amorphous film by means of a sputtering method or an ion plating method, and so has a superior effect in being able to suppress the occurrence of cracking or peeling of the film resulting from membrane stress. The thin film of the present invention is particularly useful as an optical thin film forming a protective layer for an optical information recording medium, an organic EL television thin film, and a transparent electrode thin film ...

Phosphor, production method thereof and light emitting instrument

A light emitting element includes a light-emitting source for emitting light at a wavelength of 330 to 500 nm and a constituent phosphor. The constituent phosphor includes a compound including M, A, Al, O, and N, where M is at least one kind of element selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb, and A is at least one kind of element selected from C, Si, Ge, Sn, B, Ga, In, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, Lu, Ti, Zr, Hf, Ta, and W.

Highly zirconia-based refractory and melting furnace

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

Negative active materials, lithium ion batteries, and methods thereof

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

Refractory product with high zirconia content

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

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

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

Biosoluble inorganic fiber

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

Low expansion corrosion resistant ceramic foam filters for molten aluminum filtration

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

Dielectric ceramic composition and ceramic electronic device

A dielectric ceramic composition comprises barium titanate as a main component, and as subcomponents, 1.00 to 2.50 moles of an oxide of Mg, 0.01 to 0.20 mole of an oxide of Mn and/or Cr, 0.03 to 0.15 mole of an oxide of at least one element selected from a group consisting of V, Mo and W, 0.20 to 1.50 mole of an oxide of R1 where R1 is at least one selected from a group consisting of Y and Ho, 0.20 to 1.50 mole of an oxide of R2 where R2 is at least one selected from a group consisting of Eu, Gd and Tb and 0.30 to 1.50 mole of an oxide of Si and/or B, in terms of each oxide with respect to 100 moles of the barium titanate.

Process for producing zinc oxide varistor

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

High zirconia fused cast refractory

To provide a high zirconia fused cast refractory which hardly has cracks, and has excellent durability and reusability, at the time of production of the refractory and during use for a glass melting furnace. A high zirconia fused cast refractory which has a chemical composition comprising from 85 to 95 mass % of ZrO 2 , at least 2.5 mass % of SiO 2 , at most 0.04 mass % of Na 2 O, at most 0.04 mass % of B 2 O 3 , and at most 0.04 mass % of P 2 O 5 , containing SrO as an essential component, and containing at least one of K 2 O and Cs 2 O, wherein contents of SrO, K 2 O and Cs 2 O satisfy the relations of the following formula (1) and (2) at the same time: 0.20≦[0.638×C K2O +0.213×C Cs2O +0.580×C SrO ]/C SiO2 ≦0.40   (1) 0.10≦0.580×C SrO /C SiO2   (2)

Ceramic powder and multi-layer ceramic capacitor

A ceramic powder that contains, as a main composition, barium titanate powder having a perovskite structure with an average particle size (median size) of 200 nm or smaller as measured by SEM observation, wherein the barium titanate powder is such that the percentage of barium titanate particles having twin defects in the barium titanate powder is 13% or more as measured by TEM observation and that its crystal lattice c/a is 1.0080 or more. The ceramic powder has a wide range of optimum sintering temperatures and thus offers excellent productivity and is particularly useful in the formation of thin dielectric layers of 1 μm or less.

Cubic boron nitride crystal, bodies comprising same and tools comprising same

A cubic boron nitride (cBN) crystal or plurality of crystals containing a chloride salt compound including an alkali metal or an alkali earth metal. For example, the chloride salt compound may be selected from potassium chloride, magnesium chloride, lithium chloride, calcium chloride or sodium chloride. The crystal or crystals may have a relatively rough surface texture.

CERAMIC MATERIAL AND METHOD OF PREPARING THE SAME

A ceramic material, including: BaWO-xMCO-yBaO-zBO-wSiO, where x=0-0.2 mole, y=0-0.05 mole, z=0-0.2 mole, w=0-0.1 mole, M represents an alkali metal ion selected from Li, K, Na, and x, y, z, and w are not zero at the same time. 1. A ceramic material , comprising: BaWO-xMCO-yBaO-zBO-wSiO , wherein x=0-0.2 mole , y=0-0.05 mole , z=0-0.2 mole , w=0-0.1 mole , M represents an alkali metal ion selected from Li , K , Na , and x , y , z , and w are not zero at the same time.2. A method , comprising:{'sub': 3', '3', '2', '3', '2', '3', '2', '4', '2', '3', '2', '3', '2, 'sup': +', '+', '+, '1) weighing and mixing BaCO, WO, MCO, BOand SiObased on a chemical formula BaWO-xMCO-yBaO-zBO-wSiO, wherein x=0-0.2 mole, y=0-0.05 mole, z=0-0.2 mole, w=0-0.1 mole, M represents an alkali metal ion selected from Li, K, Na, and x, y, z, and w are not zero at the same time, to yield a first powder;'}2) mixing the first powder obtained in 1), zirconia balls, and deionized water according to a mass ratio of 1:5:1-2, ball-milling for 4-7 h, drying at 80-120° C., sieving with a 40-60 mesh sieve, calcining in air atmosphere at 700-900° C. for 2-4 h, to yield a second powder;3) mixing the second powder obtained in 2), zirconia balls, and deionized water according to a mass ratio of 1:5:1-2, ball-milling for 3-6 h, drying, to yield a third powder, and adding a binder to the third powder; and4) compression molding a resulting product obtained in 3) under a pressure of 20 megapascal, drying at 400-500° C. and sintering at 850° C.-900° C. for 0.5-2 h.3. The method of claim 2 , wherein the binder is an acrylic solution. Pursuant to 35 U.S.C. § 119 and the Paris Convention Treaty, this application claims foreign priority to Chinese Patent Application No. 201910603226.3 filed Jul. 5, 2019, the contents of which, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications ...

MATERIAL INCLUDING BORON SUBOXIDE AND METHOD OF FORMING SAME

A material including a body including BOcan include lattice constant c of at most 12.318. X can be at least 0.85 and at most 1. In a particular embodiment, 0.90≤X≤1. In another particular embodiment, lattice constant a can be at least 5.383 and lattice constant c can be at most 12.318. In another particular embodiment, the body can consist essentially of BO. 1. (canceled)2. A material , having a body comprising BO , wherein:X=(Xa+Xc)/2, wherein Xa=(A−5.26)/0.1347, Xc=(C−12.410)/(−0.10435), A represents a value of lattice constant a, and C represents a value of lattice constant c; and0.85≤X≤1.2.3. The material of claim 2 , wherein the body comprises a length claim 2 , a width claim 2 , and a thickness.4. The material of claim 3 , wherein the length is greater than the width and the thickness.5. The material of claim 2 , wherein the body comprises a volume of at least 108 cm3.6. The material of claim 2 , wherein Xc is at least 0.89.7. The material of claim 2 , wherein A is at least 5.396.8. The material of claim 2 , wherein C is at most 12.318.9. An armor component claim 2 , comprising a body including the material of .10. The material of claim 2 , wherein the body has:a minimum thickness of 2 mm;a width of at least 10.0 cm; ora combination thereof.11. A material claim 2 , having a body comprising:a length, a width, and a thickness; and{'sub': 6', 'X', '6', 'X, 'BO, wherein the BOcomprises lattice constant a and lattice constant c, wherein A represents a value of constant a, and C represents a value of constant c, wherein C is at most 12.318.'}12. The material of claim 11 , wherein X=(Xa+Xc)/2 claim 11 , wherein Xa=(A−5.26)/0.1347 claim 11 , Xc=(C−12.410)/(−0.10435) claim 11 , A represents a value of lattice constant a claim 11 , and C represents a value of lattice constant c claim 11 , and wherein 0.85≤X≤1.2.13. The material of claim 11 , wherein the body is essentially free of an intentionally added sintering aid.14. The material of claim 11 , wherein the body ...

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.

Method of fabricating a sputtering target, sputtering target fabricated by using the method, and an organic light-emitting display apparatus fabricated using the sputtering target

A method of fabricating a sputtering target, a sputtering target fabricated by the method, and an organic light-emitting display apparatus fabricated by using the sputtering target. The sputtering target may be used for forming a thin film encapsulation layer. The sputtering target includes tin oxide as a main component, and a copper fluoride compound as a dopant.

CBS-BASED LTCC MATERIAL AND PREPARATION METHOD THEREOF

Disclosed is a CBS-based low-temperature co-fired ceramic (LTCC) material, and a preparation method thereof. The material has, as a main component, a sintered phase of low dielectric constant of CaSiOand CaBO, and comprises CBS and a dopant. The CBS comprises, by weight, 30-40% of CaO, 15-30% of BO, and 40-50% of SiO, and the dopant comprises 0-2% of PO, 0-2% of nanometer CuO, and 0.5-2% of nanometer VO. The preparation method comprises mixing oxides including a CBS-based dielectric ceramic as a base and one or two of POand CuO as an initial dopant, and then adding VOas a final sintering aid, to prepare the material. In the present invention, a CBS-based LTCC material that is obtained by sintering at a low temperature and has the advantages of low dielectric constant, low loss, and good overall performance is provided. 1. A CBS-based low-temperature co-fired ceramic material having , as a main component , a sintered phase of low dielectric constant of CaSiOand CaBOcomprising CBS and a dopant , wherein the CBS comprises , by weight , 30-40% of CaO , 15-30% of BO , and 40-50% of SiO , and the dopant comprises 0-2% of PO , 0-2% of nanometer CuO , and 0.5-2% of nanometer VO.2. A method for preparing a CBS-based LTCC material , comprising: mixing a CBS-based dielectric ceramic as a base with one or two of POand CuO as an initial dopant , and then adding VOas a final sintering aid , to prepare the material , wherein the material has , as a main component , a sintered phase of low dielectric constant of CaSiOand CaBOcomprising CBS and a dopant , wherein the CBS comprises , by weight , 30-40% of CaO , 15-30% of BO , and 40-50% of SiO , and the dopant comprises 0-2% of PO , 0-2% of nanometer CuO , and 0.5-2% of nanometer VO.3. The preparation method according to claim 2 , comprising the steps of(1) material mixing{'sub': 3', '3', '3', '2', '2', '3', '2', '2', '5, 'weighing the raw materials CaCO, HBO, and SiObased on 30-40% of CaO, 15-30% of BO, and 40-50% of SiO, and doping ...

High zirconia fused cast refractory

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

Low-K And Mid-K LTCC Dielectric Compositions And Devices

LTCC devices are produced from dielectric compositions comprising a mixture of precursor materials that, upon firing, forms a dielectric material comprising a barium-tungsten-silicon host. 1. A composition comprising a mixture of precursor materials that , upon firing , forms a lead-free and cadmium-free dielectric material comprising a barium-tungsten-silicon oxide host material.2. The composition according to claim 1 , wherein the dielectric material exhibits a dielectric constant of 1 to 50.3. A host material comprising:(i) 30-50 wt % BaO,{'sub': '3', '(ii) 45-65 wt % WO,'}{'sub': '2', '(iii) 1-10 wt % SiO,'}(iv) no lead, and(v) no cadmium.7. A lead-free and cadmium-free composition comprising a mixture of precursors that claim 1 , upon firing claim 1 , forms a lead-free and cadmium-free dielectric material comprising:(a) 10-55 wt % BaO,{'sub': '3', '(b) 15-60 wt % WO,'}{'sub': '2', '(c) 0.5-15 wt % SiO,'}(d) 0-27 wt % CaO,{'sub': '2', '(e) 0-35 wt % TiO,'}(f) 0-15 wt % SrO,{'sub': 2', '3, '(g) 0.05-5 wt % BO,'}(h) 0.05-5 wt % Li2O,(i) 0-5 wt % LiF,(j) 0-5 wt % CuO, and(k) 0-10 wt % ZnO.810-. (canceled)11. An electric or electronic component comprising claim 4 , prior to firing claim 4 , the lead-free and cadmium-free dielectric material of claim 4 , together with a conductive paste comprising:a. 60-90 wt % Ag+Pd+Pt+Au,b. 1-10 wt % of an additive selected from the group consisting of silicides, carbides, nitrides, and borides of transition metals,c. 0.5-10 wt % of at least one glass frit, andd. 10-40 wt % of an organic portion.12. The electric or electronic component of claim 11 , wherein the electric or electronic component is selected from the group consisting of high Q resonators claim 11 , electro-magnetic interference filter claim 11 , band pass filters claim 11 , wireless packaging systems claim 11 , and combinations thereof.13. A method of forming an electronic component comprising:{'claim-ref': {'@idref': 'CLM-00004', 'claim 4'}, '(a1) applying dielectric ...

MELTED PRODUCT WITH A HIGH ZIRCONIUM CONTENT

A fused-cast refractory product including, as mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO+HfO: remainder to 100%, with HfO≦5%; SiO: 1.5% to 7.5%; AlO: 1.0% to 3.0%; CaO+SrO: 1.2% to 3.0%; YO: 1.5% to 3.0%; NaO+KO: <0.15%; BO: <1.0%; PO: <0.15%; FeO+TiO: <0.55%; oxide species other than ZrO, HfO, SiO, AlO, NaO, KO, BO, CaO, SrO, YO, PO, FeOand TiO: <1.5%. 1. Fused-cast refractory product comprising , as mass percentages on the basis of the oxides and for a total of 100% of the oxides:{'sub': 2', '2', '2, 'ZrO+HfO: remainder to 100%, with HfO≦5%;'}{'sub': '2', 'SiO: 1.5% to 7.5%;'}{'sub': 2', '3, 'AlO: 1.0% to 3.0%;'}CaO+SrO: 1.2% to 3.0%;{'sub': 2', '3, 'YO: 1.5% to 3.0%;'}{'sub': 2', '2, 'NaO+KO: <0.15%;'}{'sub': 2', '3, 'BO: <1.0%;'}{'sub': 2', '5, 'PO: <0.15%;'}{'sub': 2', '3', '2, 'FeO+TiO: <0.55%;'}{'sub': 2', '2', '2', '2', '3', '2', '2', '2', '3', '2', '3', '2', '5', '2', '3', '2, 'oxide species other than ZrO, HfO, SiO, AlO, NaO, KO, BO, CaO, SrO, YO, PO, FeOand TiO: <1.5%.'}2. Product according to claim 1 , in which the mass content of YOis less than or equal to 2.5%.3. Product according to claim 1 , in which the mass content of YOis greater than or equal to 1.7%.4. Product according to claim 1 , in which the mass content of CaO+SrO is less than or equal to 2.5%.5. Product according to claim 1 , in which the mass content of CaO+SrO is greater than or equal to 1.3%.6. Product according to claim 1 , in which the mass content of CaO+SrO is greater than or equal to 1.8%.7. Product according to claim 1 , in which the mass content of silica SiOis greater than or equal to 2.5%.8. Product according to claim 1 , in which the mass content of silica SiOis less than or equal to 7.0%.9. Product according to claim 1 , in which the mass content of silica SiOis less than or equal to 6.0%.10. Product according to claim 1 , in which the mass content of AlOis less than or equal to 2.5%.11. Product according to claim 1 , in which the ...

Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same

The present invention relates to ferrite particles for bonded magnets having a bulk density of not more than 0.75 g/cm 3 and a degree of compaction of not less than 65%, a resin composition for bonded magnets using the ferrite particles and the composition, and a rotor. The ferrite particles for bonded magnets and the resin composition for bonded magnets according to the present invention are capable of providing a bonded magnet molded product having a good tensile elongation and an excellent magnetic properties.

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 ...

Sintered body and method for manufacturing thereof

The sintered body has an average particle size in the range of 0.1 μm or more and 5 μm or less, includes gamet-type oxide base material particles having at least Li, La, and Zr, has 8% by volume or more of voids, and has an ionic conductivity of 1.0×10 −5 S/cm or more at temperature of 25° C.

Low-temperature co-fired microwave dielectric ceramic material, and preparation method and application thereof

A low-temperature co-fired microwave dielectric ceramic material includes: (a) 85 wt % to 99 wt % ceramic material comprising MgSiO, CaSiO, CaTiO, and CaZrO, wherein a weight ratio of MgSiOrelative to CaSiOis of (1-x): x, a weight ratio of CaTiOrelative to CaZrOis of y:z, and a weight ratio of entities of MgSiOand CaSiOrelative to CaTiOis of (1-y-z):y, 0.2≤x≤0.7, 0.05≤y≤0.2, 0.05≤z≤0.4; and (b) 1 wt % to 15 wt % glass material composed of LiO, BaO, SrO, CaO, BO, and SiO. 1. A low-temperature co-fired microwave dielectric ceramic material comprising:{'sub': 2', '4', '2', '4', '3', '3', '2', '4', '2', '4', '3', '3', '2', '4', '2', '4', '3, '(a) 85 wt % to 99 wt % ceramic material comprising MgSiO, CaSiO, CaTiO, and CaZrO, wherein a weight ratio of MgSiOrelative to CaSiOis of (1-x):x, a weight ratio of CaTiOrelative to CaZrOis of y:z, and a weight ratio of entities of MgSiOand CaSiOrelative to CaTiOis of (1-y-z):y, 0.2≤x≤0.7, 0.05≤y≤0.2, 0.05≤z≤0.4; and'}{'sub': 2', '2', '3', '2, '(b) 1 wt % to 15 wt % glass material composed of LiO, BaO, SrO, CaO, BO, and SiO.'}2. The low-temperature co-fired microwave dielectric ceramic material according to claim 1 , wherein LiO accounts for a wt % (5 wt %≤a wt %≤10 wt %) by weight of the glass material; BaO accounts for b wt % (1 wt %≤b wt %≤15 wt %) by weight of the glass material; SrO accounts for c wt % (1 wt %≤c wt %≤11 wt %) by weight of the glass material; CaO accounts for d wt % (5 wt %≤d wt %≤23 wt %) by weight of the glass material; BOaccounts for e wt % (5 wt %≤e wt %≤30 wt %) by weight of the glass material; SiOaccounts for f wt % (20 wt %≤f wt %≤50 wt %) by weight of the glass material; and a wt %+b wt %+c wt %+d wt %+e wt %+f wt % =100 wt %.3. The low-temperature co-fired microwave dielectric ceramic material according to claim 1 , wherein a dielectric constant of the low-temperature co-fired microwave dielectric ceramic material ranges from 8 to 15 claim 1 , a density thereof is in the range from 3.17 to 3.52 (g/cm) ...

Method for making porous acicular mullite bodies

Acicular mullite bodies are made in two-step firing process in which a green body is converted first to a fluorotopaz and then to acicular mullite. The bodies are contained within an enclosed region of the furnace. A flow of process gas is provided through the enclosed region during the fluorotopaz-forming step. The process gas is introduced into the enclosed region through multiple openings on at least one side of the enclosed region, and withdrawn through multiple openings on another side of the enclosed region. During the acicular mullite-forming step, a flow of purge gas is maintained in the exterior portion of the furnace. This purge gas may be removed by flowing it into the enclosed region of the furnace and out of the furnace from the enclosed region without re-entering the exterior portion for the furnace.

High alumina fused cast refractory and method of producing same

The present invention provides a high alumina fused cast refractory that is easily produced and has low porosity and high corrosion resistance, and a method of producing the same. The high alumina fused cast refractory of the present invention has the following chemical composition: 95.0 mass % to 99.5 mass % Al 2 O 3 , 0.20 mass % to 1.50 mass % SiO 2 , 0.05 mass % to 1.50 mass % B 2 O 3 , 0.05 mass % to 1.20 mass % MgO and balance. The method of producing the high alumina fused cast refractory of the present invention includes obtaining a mixture by mixing an Al 2 O 3 source material, a SiO 2 source material, a B 2 O 3 source material and an MgO source material, and fusing the mixture.

Composite Articles Comprising Metal Carbide Fibers

A method of producing, from a continuous or discontinuous (e.g., chopped) carbon fiber, partially to fully converted metal carbide fibers. The method comprises reacting a carbon fiber material with at least one of a metal or metal oxide source material at a temperature greater than a melting temperature of the metal or metal oxide source material (e.g., where practical, at a temperature greater than the vaporization temperature of the metal or metal oxide source material). Additional methods, various forms of carbon fiber, metal carbide fibers, and articles including the metal carbide fibers are also disclosed. 1. An article comprising:metal carbide fibers dispersed in a matrix, the metal carbide fibers comprising metal carbide in fiber form, the metal carbide comprising at least one of aluminum carbide, beryllium carbide, calcium carbide, cerium carbide, chromium carbide, dysprosium carbide, erbium carbide, europium carbide, gadolinium carbide, hafnium carbide, holmium carbide, iron carbide, lanthanum carbide, lithium carbide, magnesium carbide, manganese carbide, molybdenum carbide, niobium carbide, neodymium carbide, praseodymium carbide, samarium carbide, scandium carbide, tantalum carbide, terbium carbide, thulium carbide, thorium carbide, titanium carbide, tungsten carbide, uranium carbide, vanadium carbide, ytterbium carbide, yttrium carbide, or zirconium carbide.2. The article of claim 1 , wherein the matrix comprises at least one of a ceramic material claim 1 , a refractory carbide material claim 1 , a metal material claim 1 , a polymer material claim 1 , or combinations thereof.3. The article of claim 1 , wherein the article is one of claim 1 , or a portion of an article selected from the group comprising a magnet claim 1 , laser claim 1 , maser claim 1 , recording device claim 1 , electrical motor claim 1 , chemical reducing agent claim 1 , ceramic capacitor claim 1 , battery electrode claim 1 , hydrogen storage device claim 1 , mercury vapor lamp claim 1 ...

Dielectric composition and electronic component

Provided is a dielectric composition exhibiting a high strength and a high specific dielectric constant. The dielectric composition contains composite oxide particles having a composition formula represented by (Sr x Ba 1-x ) y Nb 2 O 5+y and an Al-based segregation phase. The Al segregation phase has niobium, aluminum, and oxygen.

THREE-DIMENSIONAL PRINTING OF MULTILAYER CERAMIC MISSILE RADOMES BY USING INTERLAYER TRANSITION MATERIALS

Production of multilayered ceramic missile radomes with wide frequency band and high electromagnetic permeability through three-dimensional printing technology and the use of glass inter-layer materials to minimize defects caused by thermo-mechanical incompatibility of adjacent layers during sintering are provided. The three dimensional printing of the multilayered ceramic missile radomes provide an automated, operator-independent and repeatable manufacturing technique to produce wide band ceramic missile radomes. 1. A method using 3D printing technology to produce multilayer ceramic/glass-ceramic radomes with CTE-compatible layers by the use of inter-layer transition materials providing an electromagnetic permeability in a wide frequency band , comprising the steps of:(i) preparing a feed material to print by mixing predetermined compositions of at least a ceramic/glass-ceramic powder selected for each layer with organic binders enhancing a particle packing and by filling the each layer into single containers of a multi-nozzle 3D printing machine,(ii) repeating step (i) for an inter-layer transition material, wherein the inter-layer transition material is a glass or other glassy materials.(iii) preparing a computer-aided design file of a three-dimensional model of a desired radome and transferring the computer-aided design file to the multi-nozzle 3D printing machine,(iv) initiating a multi-nozzle extrusion printing process in the multi-nozzle 3D printing machine in accordance with a printing order of ceramic and transition layers,(v) debinding a green body printed in the ceramic and transition layers,(vi) machining the green body to bring an object closer to a near-net shape after firing,(vii) sintering the green body printed.2. The method according to claim 1 , further comprising the step of using glass transition elements to prevent cracks caused by Coefficient of Thermak Expansion (CTE) mismatch between printed ceramic/glass-ceramic layers.3. The method ...

HIGH STRENGTH CERAMIC FIBERS AND METHODS OF FABRICATION

A method and apparatus for forming a plurality of fibers from (e.g., CVD) precursors, including a reactor adapted to grow a plurality of individual fibers; and a plurality of independently controllable lasers, each laser of the plurality of lasers growing a respective fiber. A high performance fiber (HPF) structure, including a plurality of fibers arranged in the structure; a matrix disposed between the fibers; wherein a multilayer coating is provided along the surfaces of at least some of the fibers with an inner layer region having a sheet-like strength; and an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers. A method of forming an interphase in a ceramic matrix composite material having a plurality of SiC fibers, which maximizes toughness by minimizing fiber to fiber bridging, including arranging a plurality of SiC fibers into a preform; selectively removing (e.g., etching) silicon out of the surface of the fibers resulting in a porous carbon layer on the fibers; and replacing the porous carbon layer with an interphase layer (e.g., Boron Nitride), which coats the fibers to thereby minimize fiber to fiber bridging in the preform. 1. A high performance fiber (HPF) structure , comprising:a plurality of fibers arranged in the structure;a matrix disposed between the fibers; an inner layer region having a sheet-like strength;', 'an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers., 'wherein a multilayer coating is provided along the surfaces of at least some of the fibers, the multilayer coating including2. The structure of claim 1 , wherein the inner layer region comprises graphitic carbon ...

Dielectric powder and multilayer ceramic electronic component using the same

A multilayer ceramic electronic component includes: a body part including dielectric layers and internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and external electrodes disposed on an outer surface of the body part and electrically connected to the internal electrodes. The dielectric layer includes grains including: a semiconductive or conductive grain core region containing a base material represented by ABO 3 , where A is at least one of Ba, Sr, and Ca, and B is at least one of Ti, Zr, and Hf, and a doping material including a rare earth element; and an insulating grain shell region enclosing the grain core region.

BIOCERAMIC COMPOSITIONS

This invention relates to compositions and applications for a bioceramic composition that includes from about 45 to about 55% by weight of kaolinite (AlSiO(OH)); from about 5 to about 15% by weight of tourmaline; from about 3 to about 13% by weight of aluminum oxide (AlO); from about 11 to about 19% by weight of silicon dioxide (SiO); and from about 3 wt % to about 13 wt % zirconium oxide (ZrO). 2. The bioceramic composition of claim 1 , wherein the amount of kaolinite ranges from about 45 wt % to about 50 wt % by total weight of the composition.3. The bioceramic composition of claim 1 , wherein the amount of kaolinite ranges from about 51 wt % to about 55 wt % by total weight of the composition.4. The bioceramic composition of claim 1 , wherein the amount of kaolinite ranges from about 47 wt % to about 53 wt % by total weight of the composition.5. The bioceramic composition of claim 1 , further comprising at least one additional oxide.6. The bioceramic composition of claim 5 , wherein the one additional oxide is zirconium oxide (ZrO).7. The bioceramic composition of claim 6 , wherein the total amount of said zirconium oxide (ZrO) is from about 3 wt % to about 13 wt % zirconium oxide (ZrO) by total weight of the composition.8. The bioceramic composition of claim 6 , wherein the total amount of said zirconium oxide (ZrO) is about 8 wt % by total weight of the composition.9. The bioceramic composition of claim 1 , the largest dimension of any particle in the bioceramic composition ranges from about 0.5 μιη to about 25 μιη.10. The bioceramic composition of claim 1 , wherein the largest dimension of any particle in the bioceramic composition ranges from about 1 μιη to about 20 μιη.11. The bioceramic composition of claim 1 , wherein the total amount of kaolinite is about 50 w % by total weight of the composition.12. The bioceramic composition of claim 1 , wherein the total amount of tourmaline is about 10 w % by total weight of the composition.13. The bioceramic ...

Granules Containing Agglomerated Bulk Material

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt. 1. Granules containing at least one agglomerated reactive bulk material and a binder matrix , wherein the binder matrix contains at least one organic or inorganic salt as the binder.2. Granules according to claim 1 , wherein the melting point of the binder is lower than the melting point of the reactive bulk material.3. Granules according to claim 1 , wherein the melting point of the binder is below 600° C. claim 1 , preferably in the range from 100° C. to 600° C.4. Granules according to claim 1 , wherein the bulk material contains a reactive lime-based material claim 1 , preferably quicklime claim 1 , CaO claim 1 , calcined dolomite claim 1 , MgO.CaO claim 1 , or calcined magnesite claim 1 , MgO claim 1 , or mixtures of these substances or mixtures with the respective carbonates or other input materials.5. Granules according to claim 1 , wherein the binder contains sodium claim 1 , calcium claim 1 , boron claim 1 , aluminium claim 1 , iron claim 1 , fluorine claim 1 , nitrogen claim 1 , carbon and/or oxygen claim 1 , preferably in the form of chemical compounds.6. Granules according to claim 1 , wherein the binder contains calcium nitrate claim 1 , sodium fluoride claim 1 , cryolite claim 1 , boron trioxide claim 1 , aluminium claim 1 , and/or iron fluoride.7. Granules according to claim 1 , wherein the bulk material has an average grain size of 0 to 100 μm claim 1 , and/or a D50 value of 40 to 60 μm.8. Granules according to claim 1 , wherein the granules have a grain size of 1 to 6 mm or above.9. Granules according to claim 1 , wherein the proportion of bulk material in the granules is in the range from 85 to 99%.10. Granules according to claim 1 , wherein the proportion of binder in the granules is in the range from 1 to 15%.11. Granules according to claim 1 , wherein the ratio of bulk material ...

BORON DOPED RARE EARTH METAL OXIDE COMPOUND

A compound is generally provided that has the formula: LnBMBO, where Ln comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof; x is 0 to about 1.5; M comprises Ga, In, Al, Fe, or a combination thereof; y is 0 to about 2.5; and x+y is greater than 0. A composition is also provided that includes a silicon-containing material (e.g., silicon metal and/or a silicide) and the boron-doped refractory compound having the formula described above, such as about 0.001% to about 85% by volume of the boron-doped refractory compound. 15.-. (canceled)6. A compound having the formula:{'br': None, 'sub': 3-x', 'x', '5-y', 'y', '12, 'LnBMBO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof;x is 0;M comprises Ga, In, Al, Fe, or a combination thereof;y is 0 to about 2.5; andx+y is greater than 0.7. The compound as in claim 6 , wherein y is about 0.01 to about 2.8. The compound as in claim 6 , wherein y is about 0.01 to about 1.9. The compound as in claim 6 , wherein y is about 0.01 to about 0.5.10. The compound as in claim 6 , wherein y is about 0.01 to about 0.5.1114.-. (canceled)15. A compound having the formula:{'br': None, 'sub': 3-x', 'x', '5-y', 'y', '12, 'LnBMBO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof;x is 0 to about 1.5;y is 0 to about 2.5; andx+y is greater than 0,wherein M comprises In.16. (canceled)17. A compound having the formula:{'br': None, 'sub': 3-x', 'x', '5-y', 'y', '12, 'LnBMBO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof;x is 0 to about 1.5;y is 0 to about 2.5; andx+y is greater than 0,wherein M comprises Fe.18. A composition claim 6 , comprising: silicon metal and the compound having the formula:{'br': None, 'sub': 3-x', 'x', '5-y', 'y', '12, 'LnBMBO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a ...

SILICON COMPOSITIONS CONTAINING BORON AND METHODS OF FORMING THE SAME

A compound is provided that has the formula: LnBDMABO, where Ln comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof; x is 0 to about 2; D is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, where: D is not equal to Ln; if D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, then z is 0 to less than 4; if D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, then z is 0 to about 2; M comprises Ga, Al, or a combination thereof; A comprises Fe, In, or a combination thereof; n is 0 to about 1; y is 0 to about 1; and x+y is greater than 0. In one embodiment, a composition is generally provided that includes a silicon-containing material and such a boron-doped refractory compound. 1. A compound having the formula:{'br': None, 'i': Ln', 'D', 'M', 'A, 'sub': 4-x-z', 'x', 'z', '2-n-y', 'n', 'y', '9, 'BBO'}whereLn comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof;x is 0 to about 2; D is not equal to Ln;', 'if D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, then z is 0 to less than 4;', 'if D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, then z is 0 to about 2;, 'D is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, whereM comprises Ga, Al, or a combination thereof;A comprises Fe, In, or a combination thereof;n is 0 to about 1;y is 0 to about 1; andx+y is greater than 0.2. The composition as in claim 1 , wherein D is La claim 1 , Ce claim 1 , Pr claim 1 , Nd claim 1 , Pm claim 1 , Sm claim 1 , or a mixture thereof claim 1 , and wherein z is greater than 0 to about 4.3. The composition as in claim 1 , wherein D is La claim 1 , Ce claim 1 , Pr claim 1 , Nd claim 1 , Pm claim 1 , Sm claim 1 , or a mixture thereof claim 1 , and wherein z is greater than 0 to about 2.4. The composition as in claim 1 , wherein D is Eu claim 1 , Gd claim 1 , Tb claim 1 , Dy claim 1 , Ho claim 1 , Er claim 1 , Tm claim 1 , Yb claim 1 , Lu claim 1 , or a mixture thereof claim 1 , and wherein z is greater ...

SILICON COMPOSITIONS CONTAINING BORON AND METHODS OF FORMING THE SAME

A composition is generally provided that includes a silicon-containing material (e.g., silicon metal and/or a silicide) and a boron-doped refractory compound, such as about 0.001% to about 85% by volume of the boron-doped refractory compound (e.g., about 1% to about 60% by volume). In one embodiment, a bond coating on a surface of a ceramic component is generally provided with the bond coating including such a composition, with the silicon-containing material is silicon metal. 1. A composition , comprising: a silicon-containing material and a boron-doped refractory compound wherein the boron-doped refractory compound and the silicon-containing material form intertwined continuous phases.2. The composition as in claim 1 , wherein the composition comprises about 0.001% to about 85% by volume of the boron-doped refractory compound.3. The composition as in claim 1 , wherein the composition comprises about 1% to about 60% by volume of the boron-doped refractory compound.4. The composition as in claim 1 , wherein the boron-doped refractory compound comprises a metal oxide doped with about 0.1% to about 10% by mole percent of BO claim 1 , wherein the metal oxide comprises zirconium oxide claim 1 , hafnium oxide claim 1 , aluminum oxide claim 1 , tantalum oxide claim 1 , niobium oxide claim 1 , gallium oxide claim 1 , indium oxide claim 1 , a rare earth oxide claim 1 , a nickel oxide claim 1 , or a mixture thereof.5. The composition as in claim 1 , wherein the boron-doped refractory compound comprises a compound having the formula:{'br': None, 'sub': 2-x', 'x', '3, 'LnBO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof; andx is about 0.001 to about 1.6. The composition as in claim 1 , wherein the boron-doped refractory compound comprises a compound having the formula:{'br': None, 'sub': 2-x', 'x', '2', '5, 'LnBSiO'}whereLn comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture ...

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

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

HIGH ZIRCONIA ELECTRICALLY FUSED CAST REFRACTORY

A high zirconia electrically fused cast refractory having long time durability with less cracking during production and in the course of temperature rising, excellent in productivity, less forming zircon crystals in the refractory itself and even in contact with molten glass, excellent in bubble foamability to molten glass, less generating cracks even undergoing heat cycles during operation of a glass melting furnace. A high zirconia electrically fused cast refractory comprises, as chemical component, 85 to 95% by weight of ZrO, 0.4 to 2.5% by weight of AlO, 3.5 to 10.0% by weight of SiO, 0.05% by weight or more of NaO, 0.05 to 0.7% by weight of NaO and KO in total, 0.01 to 0.04% by weight of BO, 0.1 to 3.0% by weight of SrO or BaO when one of BaO and SrO is contained, 0.1% by weight or more of SrO and 0.1 to 3.0% by weight of SrO and BaO in total when both of BaO and SrO are contained, 0.01 to 0.2% by weight of CaO, 0.1% by weight or less of MgO, 0.01 to 0.7% by weight of SnO, 0.3% by weight or less of FeOand TiOin total, less than 0.01% by weight of PO, and less than 0.01% by weight of CuO. 1. A high zirconia electrically fused cast refractory comprising , as chemical components ,{'sub': '2', '85 to 95% by weight of ZrO,'}{'sub': 2', '1, '0.4 to 2.5% by weight of AlO,'}{'sub': '2', '3.5 to 10.0% by weight of SiO,'}{'sub': 2', '2', '2, '0.05% by weight or more of NaO, and 0.05 to 0.7% by weight of NaO and KO in total,'}{'sub': 2', '3, '0.01 to 0.04% by weight of BO,'}0.1 to 3.0% by weight of SrO or BaO when one of BaO and SrO is contained, 0.1% by weight or more of SrO and 0.1 to 3.0% by weight of SrO and BaO in total when both of BaO and SrO are contained,0.01 to 0.2% by weight of CaO,0.1% by weight or less of MgO,{'sub': '2', '0.01 to 0.7% by weight of SnO,'}{'sub': 2', '3', '2, '0.3% by weight or less of FeOand TiOin total,'}{'sub': 2', '5, 'less than 0.01% by weight of PO, and'}less than 0.01% by weight of CuO.2. The high zirconia electrically fused cast ...

Ferrite sintered magnet

The present invention provides a ferrite sintered magnet comprising ferrite crystal grains having a hexagonal structure, wherein the ferrite sintered magnet comprises metallic elements at an atomic ratio represented by formula (1). In formula (1), R is at least one element selected from the group consisting of Bi and rare-earth elements, and R comprises at least La. In formula (1), w, x, z and m satisfy formulae (2) to (5). The above-mentioned ferrite sintered magnet further has a coefficient of variation of a size of the crystal grains in a section parallel to a c axis of less than 45%. Ca 1-w-x R w Sr x Fe z Co m   (1) 0.360≤w=0.420  (2) 0.110≤x≤0.173  (3) 8.51≤z≤9.71  (4) 0.208≤m≤0.269  (5)

LTCC Dielectric Compositions And Devices Having High Q Factors

LTCC devices are produced from dielectric compositions Include a mixture of precursor materials that, upon firing, forms a dielectric material having a zinc-lithium-titanium oxide or silicon-strontium-copper oxide host.

DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC COMPONENT

A dielectric ceramic composition includes: MgSiOas main component; R-containing, Cu-containing, and B-containing compounds, and Li-containing glass, as sub-component. R is an alkali earth metal. R-containing compound greater than or equal to 0.2 part by mass and less than or equal to 4.0 parts by mass, contained in terms of oxide, Cu-containing compound of greater than or equal to 0.5 part by mass and less than or equal to 3.0 parts by mass, contained in terms of oxide, and B-containing compound greater than or equal to 0.2 part by mass and less than or equal to 3.0 parts by mass, contained in terms of oxide, to 100 parts by mass of main component. Li-containing glass of greater than or equal to 2 parts by mass and less than or equal to 10 parts by mass contained to total a 100 parts by mass of main component, and sub-component excluding Li-containing glass. 1. A dielectric ceramic composition , comprising:{'sub': 2', '4, 'MgSiOas a main component; and'}an R-containing compound, a Cu-containing compound, a B-containing compound, and Li-containing glass, as an sub-component,wherein R is an alkali earth metal,{'sub': 2', '3, 'the R-containing compound of greater than or equal to 0.2 part by mass and less than or equal to 4.0 parts by mass is contained in terms of RO, the Cu-containing compound of greater than or equal to 0.5 part by mass and less than or equal to 3.0 parts by mass is contained in terms of CuO, and the B-containing compound of greater than or equal to 0.2 part by mass and less than or equal to 3.0 parts by mass is contained in terms of BO, with respect to 100 parts by mass of the main component, and the Li-containing glass of greater than or equal to 2 parts by mass and less than or equal to 10 parts by mass is contained with respect to the total of 100 parts by mass of the main component and the sub-component excluding the Li-containing glass.'}2. The dielectric ceramic composition according to claim 1 , further comprising:a Mn-containing compound as ...

Boron Nitride Agglomerates, Method of Production Thereof and Use Thereof

The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. 119-. (canceled)20. Boron nitride agglomerates , comprising: lamellar , hexagonal boron nitride primary particles , the primary particles having an average particle size of 0.5 to 15 μm , in a binder free , flake-shape agglomerate formed with an essentially parallel alignment of the lamellae; the flake-shaped agglomerate having an average size dup to 3 mm; and wherein the proportion of forming surface , relative to the total surface of the flake-shaped agglomerates , is at least 10%. The present invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride, a method of production thereof and the use of said agglomerates as filler for polymers and for the hot pressing of boron nitride sintered compacts.Hexagonal boron nitride powder can, owing to its good thermal conductivity, be used as filler for polymers in applications simultaneously requiring good electrical insulation capability of the filler used. Furthermore, boron nitride powder is also used as sintering powder for hot pressing, for applications in metallurgy. Moreover, hexagonal boron nitride powder is used in cosmetic preparations, as a lubricant, as a parting compound in metallurgy and as raw material for the production of cubic boron nitride.Hexagonal boron nitride powder is synthesized industrially by nitriding boric acid in the presence of a source of nitrogen. Ammonia can be used as the source of nitrogen, and then usually calcium phosphate is used as the carrier material for the boric acid. An organic source of nitrogen such as melamine or urea can also be reacted under nitrogen with boric acid or borates. Nitriding is usually carried out at temperatures from 800 to 1200° C. The boron nitride then obtained is largely. amorphous, and it is ...

ZINC OXIDE VARISTOR CERAMICS

Provided according to embodiments of the invention are varistor ceramic formulations that include zinc oxide (ZnO). In particular, varistor ceramic formulations of the invention may include dopants including an alkali metal compound, an alkaline earth compound, an oxide of boron, an oxide of aluminum, or a combination thereof. Varistor ceramic formulations may also include other metal oxides. Also provided according to embodiments of the invention are varistor ceramic materials formed by sintering a varistor ceramic formulation according to an embodiment of the invention. Further provided are varistors formed from such ceramic materials and methods of making such materials. 125.-. (canceled)26. A method of preparing a ceramic material , the method comprising:providing a formulation comprising zinc oxide (ZnO) and at least one minor dopant, wherein the minor dopant comprises an alkali metal compound, an alkaline earth compound, or a combination thereof; andheating the formulation at a temperature in a range of about 1100° C. to about 1200° C. in an atmosphere including oxygen to produce the ceramic material.27. The method of claim 26 , further comprising claim 26 , after heating the formulation claim 26 , cooling the ceramic material to a temperature of about 850° C. at a first cooling rate of at least about 15° C./min.28. The method of claim 26 , further comprising cooling the ceramic material at a second cooling rate of less than about 3° C./min claim 26 , wherein the second cooling rate is applied after the first cooling rate.29. The method of claim 26 , wherein the formulation is homogenized as a slurry.30. The method of claim 26 , further comprising claim 26 , prior to heating the formulation claim 26 , pressing the formulation into a formed object claim 26 , and wherein heating the formulation comprises heating the formed object.31. The method of claim 26 , further comprising metallizing the ceramic material with at least one metal electrode.32. The 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.

Mid-K LTCC Compositions And Devices

LTCC devices are produced from dielectric compositions comprising a mixture of precursor materials that, upon firing, forms a dielectric material comprising a matrix of titanates of alkaline earth metals, the matrix doped with at least one selected from rare-earth element, aluminum oxide, silicon oxide and bismuth oxide.

Composite body

One aspect of the present invention is a composite including: a porous boron nitride sintered body; and a resin filled in pores of the boron nitride sintered body, wherein the boron nitride sintered body has an average pore diameter of 3.5 μm or less.

Sintered boron nitride body and method for producing a sintered boron nitride body

In order to provide a sintered, hexagonal boron nitride body ( 2 a, 2 b ), same is produced by at least one pressing process and subsequent sintering process from a powder (P) made of a hexagonal boron nitride, its density being deliberately set to a value of <1.6 g/cm 3 . Studies have shown that, due to the selection of this lower density, the boron nitride body ( 2 a, 2 b ) exhibits very high isotropy, when compared with conventional hexagonal boron nitride bodies. This relates in particular to thermal conductivity and the coefficient of thermal expansion, which are also largely temperature-independent.

SYSTEMS AND METHODS FOR MAKING CERAMIC POWDERS

Systems and methods for making ceramic powders configured with consistent, tailored characteristics and/or properties are provided herein. In some embodiments a system for making ceramic powders, includes: a reactor body having a reaction chamber and configured with a heat source to provide a hot zone along the reaction chamber; a sweep gas inlet configured to direct a sweep gas into the reaction chamber and a sweep gas outlet configured to direct an exhaust gas from the reaction chamber; a plurality of containers, within the reactor body, configured to retain at least one preform, wherein each container is configured to permit the sweep gas to flow therethrough, wherein the preform is configured to permit the sweep gas to flow there through, such that the precursor mixture is reacted in the hot zone to form a ceramic powder product having uniform properties. 136-. (canceled)37. A method for carbothermically producing a ceramic powder , the method comprising:a) preheating at least one container in a staging zone, wherein the at least one container comprises at least one preform, wherein the preform comprises carbon;b) moving the at least one container into a reactor body, wherein the reactor body comprises a reaction zone;c) carbothermically reacting the at least one preform in the reaction zone thereby producing a ceramic powder, wherein the carbothermically reacting comprises reducing, via the carbon of the preform, a metal compound of the preform to a metal carbide, a metal boride, or a metal nitride; andd) moving the at least one container from the reactor body to a receiving zone.38. The method of claim 37 , comprising flowing claim 37 , during at least the carbothermically reacting step claim 37 , a sweep gas into the at least one container.39. The method of claim 38 , wherein the at least one preform comprises a porosity claim 38 , wherein the flowing comprises flowing the sweep gas through at least one pore of the at least one preform.40. The method of claim ...

Thermal spray powder and film that contain rare-earth element, and member provided with film

A thermal spray powder of the present invention contains a rare earth element and a group 2 element, which belongs to group 2 of the periodic table. The thermal spray powder, which contains a rare earth element and a group 2 element, is formed, for example, from a mixture of a rare earth element compound and a group 2 element compound or from a compound or solid solution containing a rare earth element and a group 2 element. The thermal spray powder may further contain a diluent element that is not a rare earth element or a group 2 element and is not oxygen, which is at least one element selected, for example, from titanium, zirconium, hafnium, vanadium, niobium, tantalum, zinc, boron, aluminum, gallium, silicon, molybdenum, tungsten, manganese, germanium, and phosphorus.

Functional composite particles

A complex proppant particle is made of a coal dust and binder composite that is pyrolyzed. Constituent portions of the composite react together causing the particles to increase in density and reduce in size during pyrolyzation, yielding a particle suitable for use as a proppant.

CERAMIC COMPOSITION AND MATERIAL COMPRISING SAID CERAMIC COMPOSITION AS PART OF A HEAT RECOVERY UNIT

The invention relates to a ceramic composition and a material comprising said ceramic composition in the form of a coating and a steel substrate. Furthermore, the invention relates to the process to obtain said material and its use as part of a heat recovery unit. 1. A ceramic composition characterized in that it comprises a weight percent with respect to the end ceramic composition expressed in terms of the following equivalent oxides:{'sub': '2', 'between 54% and 66% of SiO,'}{'sub': 2', '3, 'between 10% and 20% of CrO,'}{'sub': '2', 'between 3% and 12% of NaO, and'}{'sub': '2', 'between 3% and 12% of ZrO.'}2. The ceramic composition according to claim 1 , which comprises up to 10% of an oxide selected from the list consisting of AlO claim 1 , BO claim 1 , BaO claim 1 , CaO claim 1 , CoO claim 1 , KO claim 1 , LiO claim 1 , MnO claim 1 , TiOor any combination thereof.3. The ceramic composition according to any one of or claim 1 , characterized in that it comprises a weight percent with respect to the end ceramic coating expressed in terms of the following equivalent oxides:{'sub': '2', 'between 54% and 66% of SiO,'}{'sub': 2', '3, 'between 12% and 20% of CrO,'}{'sub': '2', 'between 5% and 12% of NaO, and'}{'sub': '2', 'between 5% and 12% of ZrO.'}4. A material characterized in that it comprises the ceramic composition according to any of to and a substrate of steel.5. The material according to claim 4 , wherein the ceramic composition has a thickness of between 100 μm and 160 μm.6. The material according to any of or claim 4 , wherein the porosity of the ceramic composition is higher than 10% in area claim 4 , preferably the porosity ranges between 15% and 35%.7. The material according to any of to claim 4 , wherein the substrate is a tube and wherein the ceramic composition is deposited on at least one of the following surface selected from the inner surface of the tube or the outer surface of the tube.8. The material according to claim 7 , wherein the substrate ...

High-K LTCC Dielectric Compositions And Devices

Electronic devices are produced from dielectric compositions comprising a mixture of precursor materials that, upon firing forms a dielectric material comprising a barium-titanium-tungsten-silicon oxide.

SYNTHETIC GASKET MATERIALS FOR USE IN HIGH PRESSURE HIGH TEMPERATURE PRESSES

A gasket material for high pressure high temperature presses, comprising: a proportion of a clay mineral a proportion of a hard material for increasing the viscosity of the clay mineral a proportion of a binder selected from the group of borate binders, phosphate binders, and mixtures thereof. 1. A gasket material for high pressure high temperature presses , comprising:i. a proportion of a clay mineralii. a proportion of a hard material for increasing the viscosity of the clay mineraliii. a proportion of a binder selected from the group of borate binders, and mixtures of borate binders and phosphate binders.2. The gasket material as claimed in claim 1 , in which the proportions of clay mineral to hard material lie in the respective ratios 1-10:10-1.3. The gasket material as claimed in claim 1 , in which the proportion of binder to the combined amount of clay mineral and hard material lies in the respective ratios 1:1-100.4. The gasket material as claimed in claim 1 , in which the total amount of clay mineral claim 1 , hard material claim 1 , and binder lies in the range 70-100 wt % of the gasket material.6. The gasket material as claimed in claim 5 , comprising 61 wt % or more clay mineral.8. The gasket material as claimed in claim 1 , in which the clay mineral is selected from the group consisting of akermanite claim 1 , bertandite claim 1 , kaolinite claim 1 , pyrophyllite claim 1 , prehnite claim 1 , pyrope claim 1 , scolecite claim 1 , serpentine claim 1 , talc claim 1 , zoisite claim 1 , and mixtures thereof.9. The gasket material as claimed in claim 1 , in which the hard material is selected from the group consisting of silica claim 1 , zircon claim 1 , garnet claim 1 , silicon carbide claim 1 , boron carbide claim 1 , alumina claim 1 , zirconia claim 1 , kyanite claim 1 , mullite claim 1 , and mixtures thereof.10. A method of making a gasket material as claimed in claim 1 , comprising the steps of dispersing the solid constituents claim 1 , blending them ...

Garnet-Type Oxide Sintered Body and Method for Producing Same

A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound. 1. A garnet-type oxide sintered body comprising:crystal grains composed of a garnet-type oxide containing Li, La and Zr; anda grain boundary composition containing boron and silicon and filling gaps between the crystal grains.2. The garnet-type oxide sintered body according to claim 1 , wherein a volume proportion of the grain boundary composition in the sintered body is 2 to 50 volume %.3. The garnet-type oxide sintered body according to claim 1 , wherein the sintered body has a density of 3.6 g/cmor higher.4. The garnet-type oxide sintered body according to claim 1 , wherein a ratio of boron and silicon atoms contained in the grain boundary composition is 0.2:1 to 19.2 to 1.5. The garnet-type oxide sintered body according to claim 4 , wherein the garnet-type oxide has a basic composition represented by the formula: (LiAl)LaZrOwhere 0≤x<0.4.6. A lithium secondary battery comprising:a lithium-ion conductive solid electrolyte layer; andan active material layer stacked on the solid electrolyte layer and being capable of absorbing and releasing lithium,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'wherein the garnet-type oxide sintered body according to is used as the solid electrolyte ...

FORMED HEXAGONAL BORON NITRIDE BODY, HEAT-TREATED HEXAGONAL BORON NOTRIDE BODY AND PROCESSES FOR PRODUCING THE SAME

Provided are materials for a formed body comprising hexagonal boron nitride and such formed bodies. Also provided are heat-treated formed body obtained by heat-treating the formed bodies. The invention further relates to processes for making the formed body and the heat-treated formed body. 120-. (canceled)21. A formed body comprising a material composition , the material composition comprising hexagonal boron nitride , a water-soluble boron compound and a further inorganic compound selected froma metal hydroxide or a metal oxyhydroxide, the metal being optionally selected from the group consisting of aluminum, calcium and magnesium, ora carbonate or a hydrogen carbonate of an alkali metal, an alkaline earth metal, ora combination thereof, wherein the further inorganic compound is able to split off a gaseous phase at a heat treatment at a temperature of at most 1000° C., and wherein the further inorganic compound is able to form, with the water-soluble boron compound, a water-insoluble boron compound at a heat treatment at a temperature of 200-1000° C.;wherein the gaseous phase is water, carbon dioxide, or a combination thereof; andwherein the formed body is obtained by a process comprising a forming step, wherein the forming step is carried out at a temperature of from 10 to 40° C.22. The formed body of claim 21 , wherein the content of the further inorganic compound in the material composition is at least 0.5% by weight claim 21 , based on the total weight of the formed body.23. The formed body of claim 21 , wherein the further inorganic compound is boehmite claim 21 , and wherein the molar ratio of boehmite to the water soluble boron compound in the material composition is from 0.3:1 to 6:1 expressed as a molar ratio of AlO(OH):HBO.24. The formed body of claim 21 , wherein the boron nitride content is at least 15% by weight claim 21 , based on the total weight of the material composition.25. The formed body according to claim 21 , wherein the formed body has a ...

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. ...

COG Dielectric Composition For Use With Nickel Electrodes

Multilayer ceramic chip capacitors which satisfy COG requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a barium strontium zirconate matrix doped with other metal oxides such as TiO, CaO, BO, and MgO in various combinations. 1. A composition comprising a mixture of precursors that , upon firing , forms a dielectric material comprising:from about 26.5 wt % to about 34.0 wt % BaO;from about 18.0 wt % to about 24.5 wt % SrO;{'sub': '2', 'from about 41.0 wt % to about 50.0 wt % ZrO;'}from about 0.50 wt % to about 1.50 wt % CaO; and{'sub': '2', 'from about 0.70 wt % to about 2.50 wt % TiO.'}2. The composition according to claim 1 , further comprising precursors such that upon firing the dielectric material further comprises:{'sub': 2', '3, 'from about 0.01 to about 1.0 wt % BO; and'}from about 0.01 to about 1.47 wt % MgO.3. A lead-free and cadmium-free dielectric paste comprising a solids portion wherein the solids portion comprises the dielectric material of .4. The lead-free and cadmium-free dielectric paste of claim 3 , wherein the solids portion further comprises at least one selected from the group consisting of:{'sub': 2', '3, 'from about 0.01 to about 1.0 wt % BO;'}from about 0.01 to about 1.47 wt % MgO;{'sub': 3', '3, 'from about 0.01 to about 1.78 wt % HBO; and'}{'sub': '2', 'from about 0.01 to about 2.14 wt % Mg(OH).'}5. A method of forming an electronic component comprising:{'claim-ref': {'@idref': 'CLM-00004', 'claim 4'}, 'applying the dielectric paste of to a substrate; and'}firing the substrate at a ...

VOLTAGE NONLINEAR RESISTOR

A voltage nonlinear resistor according to the present invention includes a sintered body consisting essentially of zinc oxide and containing bismuth, antimony, and boron as accessory components. The accessory components are bismuth oxide of 1.5 to 2.5 mol %, antimony oxide of 1 to 2 mol %, and boron oxide of 0.3 mol % or less in terms of oxides. 1. A voltage nonlinear resistor comprising:a sintered body consisting essentially of zinc oxide and containing bismuth, antimony, and boron as accessory components, whereinthe accessory components are bismuth oxide of 1.5 to 2.5 mol %, antimony oxide of 1 to 2 mol %, and boron oxide of 0.3 mol % or less in terms of oxides.2. The voltage nonlinear resistor according to claim 1 , wherein: [{'br': None, 'i': N', '/N, 'sub': is', 'd, 'sup': '−5', '≧0.57×10\u2003\u2003Equation (1)'}, {'br': None, 'i': N', '/N, 'sub': is', 'd, 'sup': 2', '7, '≧1.65×10\u2003\u2003Equation (2)'}], 'Equations (1) and (2) are satisfied{'sub': is', 'd, '(in Equations (1) and (2), Nis an interface state density at a grain boundary of the zinc oxide, and Nis a donor density at a grain boundary of the zinc oxide).'}3. The voltage nonlinear resistor according to claim 1 , wherein:{'sub': 1 mA', '10 kA', '10 kA', '1 mA', '1 mA, 115° C.', '1 mA, 30° C.', '1 mA, 115° C.', '1 mA, 30° C., 'when voltage when 1-mA current flows into the voltage nonlinear resistor is V, and when peak voltage when 10-kA impulse current flows into the voltage nonlinear resistor is V, a voltage clamping ratio V/Vis less than 1.6, and when voltage when 1-mA current flows into the voltage nonlinear resistor at 115° C. is V, and when voltage when 1-mA current flows into the voltage nonlinear resistor at 30° C. is V, a temperature characteristic V/Vis 0.95 or more.'}4. The voltage nonlinear resistor according to claim 2 , wherein:{'sub': 1 mA', '10 kA', '10 kA', '1 mA', '1 mA, 115° C.', '1 mA, 30° C.', '1 mA, 115° C.', '1 mA, 30° C., 'when voltage when 1-mA current flows into the voltage ...

Alumina sintered body and method for producing same

Provided is an alumina sintered body which has a high heat conductivity and a high infrared ray emissivity and is excellent in electrical insulation property and chemical resistance. An alumina sintered body contains cubic aluminum nitride.

HIGH STRENGTH CERAMIC FIBERS AND METHODS OF FABRICATION

A method and apparatus for forming a plurality of fibers from (e.g., CVD) precursors, including a reactor adapted to grow a plurality of individual fibers; and a plurality of independently controllable lasers, each laser of the plurality of lasers growing a respective fiber. A high performance fiber (HPF) structure, including a plurality of fibers arranged in the structure; a matrix disposed between the fibers; wherein a multilayer coating is provided along the surfaces of at least some of the fibers with an inner layer region having a sheet-like strength; and an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers. A method of forming an interphase in a ceramic matrix composite material having a plurality of SiC fibers, which maximizes toughness by minimizing fiber to fiber bridging, including arranging a plurality of SiC fibers into a preform; selectively removing (e.g., etching) silicon out of the surface of the fibers resulting in a porous carbon layer on the fibers; and replacing the porous carbon layer with an interphase layer (e.g., Boron Nitride), which coats the fibers to thereby minimize fiber to fiber bridging in the preform. 1. A high performance fiber (HPF) structure , comprising:a plurality of fibers arranged in the structure;a matrix disposed between the fibers; an inner layer region having a sheet-like strength;', 'an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers., 'wherein a multilayer coating is provided along the surfaces of at least some of the fibers, the multilayer coating including2. The structure of claim 1 , wherein the inner layer region comprises graphitic carbon ...

Ferrite sintered body and electronic component using thereof

A ferrite sintered body of the invention includes; a main component including 48.65 to 49.45 mol % of iron oxide in terms of Fe2O3, 2 to 16 mol % of copper oxide in terms of CuO, 28.00 to 33.00 mol % of zinc oxide in terms of ZnO, and a balance including nickel oxide, and a subcomponent including boron oxide in an amount of 5 to 100 ppm in terms of B2O3 with respect to 100 parts by weight of the main component, in which the ferrite sintered body includes crystal grains having an average crystal grain size of 2 to 30 μm.

COG Dielectric Composition For Use With Nickel Electrodes

Multilayer ceramic chip capacitors which satisfy COG requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys may be used for internal and external electrodes are disclosed. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a strontium zirconate matrix doped with other metal oxides such as TiO, MgO, BO, CaO, MnO, Nd2O3 and Nb2O5 in various combinations. 1: A composition comprising a mixture of precursor materials that , upon firing , forms a dielectric material comprising a strontium-zirconate matrix doped with at least niobium , boron and magnesium.2: The composition according to claim 1 , wherein the dielectric material exhibits a dielectric constant greater than 31.3: The composition according to claim 1 , wherein the mixture further comprises precursor materials such that claim 1 , upon firing claim 1 , result in the dielectric material further comprising one or more dopants selected from the group consisting of titanium claim 1 , calcium claim 1 , neodymium claim 1 , and manganese.4: A lead-free and cadmium-free dielectric material comprising a solids portion wherein the solids portion comprises claim 1 , prior to firing:from about 38.3 wt % to about 44.2 wt % SrO;{'sub': '2', 'from about 41.6 wt % to about 50.0 wt % ZrO;'}{'sub': '2', 'optionally up to about 4.8 wt % TiO;'}optionally up to about 3.2 wt % CaO;{'sub': 2', '5, 'from about 6.4 wt % to about 7.6 wt % NbO;'}{'sub': 2', '3, 'optionally up to about 4.1 wt % NdO;'}{'sub': 2', '3, 'from about 0.27 wt % to about 0.38 wt % BO;'}from about 0.31 wt % to about 0.44 wt % MgO; andoptionally up to about 0.06 wt % MnO.5: A method of forming an electronic component comprising:{'claim-ref': {'@idref': 'CLM-00004', ' ...

High-K LTCC Dielectric Compositions And Devices

Electronic devices are produced from dielectric compositions comprising a mixture of precursor materials that, upon firing, forms a dielectric material comprising a barium-strontium-titanium-tungsten-silicon oxide. 114-. (canceled)15. A composition comprising a mixture of precursors that , upon firing , forms a dielectric material comprising:from about 20.0 wt % to about 45.0 wt % BaO;from about 10.0 wt % to about 38.0 wt % SrO;{'sub': '2', 'from about 15.0 wt % to about 47.0 wt % TiO;'}{'sub': '3', 'from about 0.1 wt % to about 25.0 wt % WO; and'}{'sub': '2', 'from about 0.01 wt % to about 12.0 wt % SiO.'}16. The composition according to claim 15 , wherein the mixture of precursors further comprises precursors such that claim 15 , upon firing claim 15 , the dielectric material further comprises at least one selected from the group consisting of:from about 0.1 to about 15.0 wt % ZnO;{'sub': 2', '3, 'from about 0.1 to about 10.0 wt % BO;'}from about 0.01 to about 2.0 wt % LiF;from about 0.01 to about 2.0 wt % CuO; and{'sub': 2', '2', '3, 'from about 0.01 to about 2.0 wt % of at least one selected from the group consisting of MnO, MnO, and MnO.'}17. The composition according to comprising a mixture of precursors that claim 16 , upon firing claim 16 , forms a dielectric material comprising:from about 20.0 wt % to about 45.0 wt % BaO;from about 10.0 wt % to about 38.0 wt % SrO;{'sub': '2', 'from about 15.0 wt % to about 47.0 wt % TiO;'}{'sub': '3', 'from about 0.1 wt % to about 25.0 wt % WO;'}{'sub': '2', 'from about 0.01 wt % to about 12.0 wt % SiO;'}from about 0.1 to about 15.0 wt % ZnO;{'sub': 2', '3, 'from about 0.1 to about 10.0 wt % BO;'}from about 0.01 to about 2.0 wt % LiF;from about 0.01 to about 2.0 wt % CuO; and{'sub': 2', '2', '3, 'from about 0.01 to about 2.0 wt % of at least one selected from the group consisting of MnO, MnO, and MnO.'}18. A lead-free and cadmium-free dielectric paste comprising a solids portion claim 16 , wherein the solids portion ...

CERAMIC FOAM FILTER FOR NON-FERROUS METALS

A ceramic foam filter for use in filtering non-ferrous metals and manufacturing method for same are disclosed. The ceramic foam filter includes calcined alumina as a core material and silica as a binder. Alternatively, the ceramic foam filter includes calcined alumina as a core material and boric oxide as a binder. 1. A ceramic foam filter for use in filtering non-ferrous metals , comprising calcined alumina as a core material and silica as a binder.2. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition comprising calcined alumina in the range 75-95 wt % claim 1 , and silica in the range 3-15 wt %.3. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition comprising calcined alumina in the range 80-90 wt % claim 1 , and silica in the range 5-10 wt %.4. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition that further comprises borate glass in the range 3-15 wt %.5. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition that further comprises borate glass in the range 5-10 wt %.6. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition that further comprises boric oxide in the range 0-5 wt %7. A ceramic foam filter according to claim 1 , wherein the filter has a chemical composition that further comprises boric oxide in the range 0-3 wt %.8. A ceramic foam filter according to claim 1 , having a density in the range 320-380 kg/m.9. A ceramic foam filter according to claim 1 , having a density in the range 340-360 kg/m.10. A method of manufacturing a ceramic foam filter for use in filtering non-ferrous metals claim 1 , the method comprising providing a slurry comprising calcined alumina and colloidal silica claim 1 , coating the slurry onto a foam precursor claim 1 , drying the slurry-coated foam precursor to form a green state article claim 1 , and firing the green state article to ...

Porous ceramic article and method of manufacturing the same

The present disclosure relates to porous ceramic articles and a method of making the same. The porous ceramic articles have microstructure of sinter bonded or reaction bonded large pre-reacted particles and pore network structure exhibiting large pore necks. The method of making the porous ceramic articles involves using pre-reacted particles having one or more phases. A plastic ceramic precursor composition is also disclosed. The composition includes a mixture of at least one of dense, porous, or hollow spheroidal pre-reacted particles and a liquid vehicle.

DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC COMPONENT

Provided is a dielectric ceramic composition comprising a main component of forsterite and calcium strontium titanate. A content ratio of forsterite in the main component is from 84.0 to 92.5 parts by mole, and a content ratio of calcium strontium titanate is from 7.5 to 16.0 parts by mole. (Sr+Ca)/Ti in the calcium strontium titanate is from 1.03 to 1.20 in terms of a molar ratio. With respect to a total of 100 parts by mass of the main component and a subcomponent except for Li-containing glass, from 2 to 10 parts by mass of Li-containing glass is added. The Li-containing glass includes AlOin an amount of from 1% by mass to 10% by mass.

Carbon composites and methods of manufacture

A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350° C. to about 1200° C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof wherein the nonmetal is selected from the group consisting of SiO 2 , Si, B, B 2 O 3 , and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

MAGNESIA, METHOD FOR MANUFACTURING SAME, HIGHLY THERMALLY CONDUCTIVE MAGNESIA COMPOSITION, AND MAGNESIA CERAMIC USING SAME

The present invention discloses magnesia and a method for manufacturing same, wherein the magnesia can be produced into granules of various shapes and sizes and can be improved in moisture resistance with the formation of a moisture resistant surface oxide layer by donor addition and then thermal treatment. The magnesia according to the present invention comprises a MgO granule; and a surface oxide layer formed on a surface of the MgO granule and a composition of the surface oxide layer is different from a composition of an inside of the MgO granule. 17.-. (canceled)8. Magnesia (MgO) , comprising:a MgO granule; anda surface oxide layer formed on a surface of the MgO granule,wherein a composition of the surface oxide layer is different from a composition of an inside of the MgO granule.9. The magnesia (MgO) of claim 8 , wherein a donor at an inside of the surface oxide layer comprises at least one of TiO claim 8 , NbO claim 8 , ZrO claim 8 , GaO claim 8 , MnO claim 8 , BO claim 8 , FeO claim 8 , SnO claim 8 , MnO claim 8 , SiO claim 8 , VO claim 8 , TaO claim 8 , SbO claim 8 , YO claim 8 , EuO claim 8 , or AlO.10. (canceled)11. The magnesia (MgO) of claim 8 ,{'sub': 2', '2', '5, 'claim-text': {'br': None, 'i': x', '+y, 'sub': 2', '2', '5, 'MgO+wt. % of TiOwt. % of NbO≤100 wt. % \u2003\u2003Equation (6)'}, 'wherein the magnesia comprises TiOand NbOand satisfies the following Equation (6)(In Equation (6), x and y are 0 Подробнее

Ferrite Magnetic Material And Ferrite Sintered Magnet

The present invention provides a ferrite magnetic material that is inexpensive by reducing the contents of La and Co and capable of providing a remarkably high maximum energy product ((BH) max ) as compared with the conventional ferrite magnetic materials by inducing a high saturation magnetization and a high anisotropic magnetic field.

Ferrite sintered magnet

A ferrite sintered magnet comprises a plurality of main phase grains containing a ferrite having a hexagonal structure, wherein at least some of the main phase grains are core-shell structure grains each having a core and a shell covering the core; and wherein the minimum value of the content of La in the core is [La]c atom %; the minimum value of the content of Co in the core is [Co]c atom %; the maximum value of the content of La in the shell is [La]s atom %; the maximum value of the content of Co in the shell is [Co]s atom %; [La]c+[Co]c is 3.08 atom % or more and 4.44 atom % or less; and [La]s+[Co]s is 7.60 atom % or more and 9.89 atom % or less.

DIELECTRIC COMPOSITION, DIELECTRIC ELEMENT, ELECTRONIC COMPONENT, AND MULTILAYER ELECTRONIC COMPONENT

A dielectric composition with high voltage resistance and favorable reliability, and an electronic component using the dielectric composition. The dielectric composition contains, as a main component, a tungsten bronze type composite oxide represented by a chemical formula (SrBaCa)R(TiZr)(NbTa)O, in which the R is at least one element selected from Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and s, t, x, a, and b satisfy 0.50≤s≤1.00, 0≤t≤0.30, 0.50≤s+t≤1.00, 1.50 Подробнее

CORDIERITE-BASED CERAMIC(S) AND MEMBER FOR A TELESCOPE

A cordierite-based ceramic(s) is provided where a main crystalline phase thereof is a cordierite crystalline phase, a content of Mg is 13.2% by mass or more and 13.8% by mass or less in an MgO equivalent, a content of Al is 26.0% by mass or more and 32.1% by mass or less in an AlOequivalent, a content of Bi is 1.6% by mass or more and 4.6% by mass or less in a BiOequivalent, a content of B is 1.5% by mass or more and 6.8% by mass or less in a BOequivalent, and a content of Si is 49.4% by mass or more and 51.4% by mass or less in an SiOequivalent.

Production method for non-alkali glass

The present invention relates to a production method for a non-alkali glass, containing putting glass raw materials in a melting furnace, heating to a temperature of 1,350 to 1,750° C. to prepare a molten glass, and forming the molten glass into a sheet shape by float method, in which the heating in the melting furnace concurrently utilizes heating by combustion flame of burners and electrical heating of the molten glass by heating electrodes arranged so as to be dipped in the molten glass in the melting furnace, and in which when electrical resistivity at 1,350° C. of the molten glass is represented by Rg (Ωcm) and electrical resistivity at 1,350° C. of a refractory constituting the melting furnace is represented by Rb (Ωcm), the glass raw materials and the refractory are selected so as to achieve Rb>Rg.

SYSTEMS AND METHODS FOR MAKING CERAMIC POWDERS

Systems and methods for making ceramic powders configured with consistent, tailored characteristics and/or properties are provided herein. In some embodiments a system for making ceramic powders, includes: a reactor body having a reaction chamber and configured with a heat source to provide a hot zone along the reaction chamber; a sweep gas inlet configured to direct a sweep gas into the reaction chamber and a sweep gas outlet configured to direct an exhaust gas from the reaction chamber; a plurality of containers, within the reactor body, configured to retain at least one preform, wherein each container is configured to permit the sweep gas to flow therethrough, wherein the preform is configured to permit the sweep gas to flow there through, such that the precursor mixture is reacted in the hot zone to form a ceramic powder product having uniform properties. 1. A method for carbothermically producing a ceramic powder , the method comprising: (i) wherein the at least one preform comprises a mixture, wherein the mixture comprises a carbon source and at least one of (a) a metal oxide and (b) boric acid; and', '(ii) wherein the at least one preform comprises at least one gas channel;, 'a) preheating at least one container in a staging zone, wherein the at least one container comprises at least one preform;'}b) moving the at least one container into a reactor body, wherein the reactor body comprises a reaction zone;c) carbothermically reacting the at least one preform in the reaction zone thereby producing a ceramic powder, wherein the carbothermically reacting comprises reducing, via the carbon of the at least one preform, at least one of the metal oxide and the boric acid of the at least one preform to form the ceramic powder, wherein the ceramic powder comprises ceramic particles, wherein the ceramic particles are selected from the group consisting of metal carbide particles, metal boride particles, metal nitride particles, and combinations therefor; andd) moving the ...

TIRE STUD AND MANUFACTURING METHOD THEREFOR

A tire stud according to the present invention is manufactured from ceramic, and thus has characteristics of causing the strength of ceramics to recover through crack healing while lowering residual stress by improving a sintering process. In addition, abrasion resistance is improved by further adding a sintering aid and an organic oxide during sintering, and thus friction with a road surface can always be maintained to be constant and life span can be greatly increased. 1. A tire stud comprising:a main body;a support positioned at a lower end of the main body; anda fastening portion that is positioned at an upper end of the main body and is formed to have one surface sunken toward a center of the main body by a certain degree or more,wherein the main body, the support, and the fastening portion are manufactured by putting one or two or more ceramics selected from the group consisting of silicon oxide, silicon carbide, silicon nitride, silicon alumina nitride, aluminum oxide, zirconium oxide, and cordierite in a mold and sintering.2. The tire stud according to claim 1 ,wherein the ceramics are obtained by mixing 50 to 85 wt % of aluminum oxide and 15 to 50 wt % of one or two more ceramics selected from the group consisting of silicon oxide, silicon carbide, silicon nitride, silicon alumina nitride, zirconium oxide, and cordierite.3. The tire stud according to claim 2 ,wherein, with respect to 100 parts by weight of the ceramics, 0.1 to 5 parts by weight of one or two or more sintering aids selected from the group consisting of lanthanum aluminum oxide, yttrium aluminum oxide, rhenium-aluminum oxide, samarium-aluminum oxide, neodymium aluminum oxide, yttrium oxide, and scandium oxide are added.4. The tire stud according to claim 1 ,wherein the ceramics have an average grain size of 0.1 to 50 μm.5. The tire stud according to claim 1 ,wherein the main body, the support, and the fastening portion are manufactured by putting a ceramic in a mold and then sintering under ...

Ferrite sintered magnet, motor and generator

Provided is a ferrite sintered magnet including a main phase formed of ferrite having a hexagonal magnetoplumbite type crystalline structure, in which the main phase contains Fe and Co, and the ferrite sintered magnet contains CaB 2 O 4 . CaB 2 O 4 is contained in a heterophase that is a crystalline phase different from the main phase, and an area ratio of CaB 2 O 4 to the entire cross-sectional surface of a sintered magnet, is less than or equal to 2%.

ZINC OXIDE BASED VARISTOR AND FABRICATION METHOD

A varistor may include a varistor ceramic that includes zinc oxide having a molar percent greater than 90 percent and a set of metal oxides, where the set of metal oxides includes BiOhaving a molar fraction between 0.2 and 2.5 percent; CoOhaving a molar fraction between 0.2 and 1.2 percent; MnOhaving a molar fraction between 0.05 and 0.5 percent; CrOhaving a molar fraction between 0.05 and 0.5 percent; NiO having a molar fraction between 0.5 and 1.5 percent; SbOoxide having a molar fraction between 0.05 and 1.5 percent; BOhaving a molar fraction between 0.001 to 0.03 percent; and aluminum in the form of an oxide having a molar fraction between 0.001 and 0.05 percent. 1. A varistor ceramic comprising:zinc oxide having a molar percent greater than 90 percent; [{'sub': 2', '3, 'bismuth in oxide form comprising a molar fraction equivalent to between 0.2 and 2.5 percent BiO;'}, {'sub': 3', '4, 'cobalt in oxide form comprising a molar fraction equivalent to between 0.2 and 2.0 percent CoO;'}, {'sub': 3', '4, 'manganese in oxide form comprising a molar fraction equivalent to between 0.05 and 1.5 percent MnO;'}, {'sub': 2', '3, 'chromium in oxide form comprising a molar fraction equivalent to between 0.05 and 0.5 percent CrO;'}, 'nickel in oxide form comprising a molar fraction equivalent to between 0.5 and 1.5 percent NiO;', {'sub': 2', '3, 'antimony in oxide form comprising a molar fraction equivalent to between 0.05 and 1.5 percent SbO;'}, {'sub': 2', '3, 'boron in oxide form comprising a having a molar fraction equivalent to 0.001 to 0.05 percent BO; and'}], 'a set of metal oxides, the set of metal oxides comprisingaluminum in oxide form comprising a molar fraction equivalent to between 0.001 and 0.05 percent.2. The varistor of claim 1 , comprising:{'sub': 2', '3, 'bismuth in oxide form comprising a molar fraction equivalent to between 0.8 and 1.0 percent BiO;'}{'sub': 3', '4, 'cobalt in oxide form comprising a molar fraction equivalent to between 0.4 and 0.6 percent ...

MATERIAL, USE THEREOF AND METHOD TO MANUFACTURE SAID MATERIAL

Material, use thereof and method to manufacture said material; wherein the material is porous and has: a total porosity ranging from 50% to 80%, in particular from 60% to 70%; interconnected pores; at least a part made of a hydrophilic material, in particular at least a part of the inner surfaces of the pores is made of a hydrophilic material; a permeability coefficient (k) greater than 10˜6 m/sec; and wherein, in a given volume of the material (), the total volume of pores with a diameter ranging from 0.1μπι to approximately 0.3 nm is at least greater than 15% of the total volume of the pores, preferably it ranges from 15 to 36%. 1. A porous material , characterized in that it has: a porosity ranging from 50% to 80% , in particular from 60% to 70%; interconnected pores; at least a part made of a hydrophilic material , in particular at least a part of the inner surfaces of the pores is made of a hydrophilic material; a permeability coefficient greater than 10m/sec; and wherein , in a given volume of the material , the total volume of pores with a diameter ranging from 0.1 μm to approximately 0.3 nm is at least 15% of the total volume of the pores , in particular approximately from about 15% to 34% of the total volume of the pores.2. A material according to claim 1 , wherein from 24% to 32% claim 1 , in particular approximately 28% claim 1 , of the volume of the pores is occupied by pores having a diameter ranging from approximately 0.8 mm to approximately 6.25 μm.3. A material according to claim 1 , wherein from 36% to 44% claim 1 , in particular approximately 40% claim 1 , of the volume of the pores is occupied by pores having a diameter ranging from 6.25 μm to 0.1 μm.4. A material according to claim 1 , wherein claim 1 , in a given volume of the material claim 1 , the total volume of pores with a diameter ranging from approximately 0.3 nm to approximately 140 pm is at least 5% of the total volume of the pores claim 1 , in particular it ranges from 5% to 10%.5. A ...

REFRACTORY MATERIAL AND CASTING NOZZLE

Provided is a refractory material having both excellent erosion/corrosion resistance and thermal shock resistance, which has hardly been obtainable by conventional techniques, and a casting nozzle using the refractory material. The refractory material of the present invention contains: MgO in an amount of 40 mass % or more; a free carbon component in an amount of 4 to 30 mass %; and one or more selected from the group consisting of BO, PO, SiOand TiO, in a total amount of 0.3 to 3 mass %, with the remainder being at least one other type of additional refractory component, wherein a void layer exists in an interface between a carbon-containing matrix microstructure residing at least on opposite sides of a maximum-size one of a plurality of MgO-containing particles in the refractory material, and the maximum-size MgO-containing particle, wherein a sum of respective thicknesses of the void layer at two positions on the opposite sides is 0.2 to 3.0% in terms of a ratio with respect to a particle size of the maximum-size MgO-containing particle, and wherein an inorganic compound comprised of MgO and the one or more selected from the group consisting of BO, PO, SiOand TiOexists in an entirety or a part of a surface of each of the plurality of MgO-containing particles. 1. A refractory material containing , in terms of a chemical composition as measured after being subjected to a heat treatment in a non-oxidizing atmosphere at 1000° C.: MgO in an amount of 40 mass % or more; a free carbon component in an amount of 4 to 30 mass %; and one or more selected from the group consisting of BO , PO , SiOand TiO , in a total amount of 0.3 to 3 mass % , with the remainder being at least one other type of additional refractory component ,wherein a void layer exists in an interface between a carbon-containing matrix microstructure residing at least on opposite sides of a maximum-size one of a plurality of MgO-containing particles in the refractory material, and the maximum-size MgO- ...

COMPOSITIONS FOR EROSION AND MOLTEN DUST RESISTANT ENVIRONMENTAL BARRIER COATINGS

Compounds are generally provided, which may be particularly used to form a layer in a coating system. In one embodiment, the compound may have the formula: ABLnHfTiDMO, where: A is Al, Ga, In, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Fe, Cr, Co, Mn, Bi, or a mixture thereof; x is about 0.01 to about 0.99; b is 0 to about 0.5, with 1-x-b being 0 to about 0.99 such that Ln is present in the compound; Ln is a rare earth or a mixture thereof that is different than A; t is 0 to about 0.99; D is Zr, Ce, Ge, Si, or a mixture thereof; d is 0 to about 0.5; the sum of t and d is less than 1 such that Hf is present in the compound; and M is Ta, Nb, or a mixture thereof.

CRYSTALLINE BORON NITRIDE AEROGELS

This disclosure provides methods and materials related to boron nitride aerogels. For example, one aspect relates to a method for making an aerogel comprising boron nitride, comprising: (a) providing boron oxide and an aerogel comprising carbon; (b) heating the boron oxide to melt the boron oxide and heating the aerogel; (c) mixing a nitrogen-containing gas with boron oxide vapor from molten boron oxide; and (d) converting at least a portion of the carbon to boron nitride to obtain the aerogel comprising boron nitride. Another aspect relates to a method for making an aerogel comprising boron nitride, comprising heating boron oxide and an aerogel comprising carbon under flow of a nitrogen-containing gas, wherein boron oxide vapor and the nitrogen-containing gas convert at least a portion of the carbon to boron nitride to obtain the aerogel comprising boron nitride. 1. A method for making an aerogel comprising boron nitride , comprising:(a) providing boron oxide and an aerogel comprising carbon;(b) heating the boron oxide to melt the boron oxide and heating the aerogel;(c) mixing a nitrogen-containing gas with boron oxide vapor from molten boron oxide; and(d) converting at least a portion of the carbon to boron nitride to obtain the aerogel comprising boron nitride.2. The method of claim 1 , wherein the aerogel comprising carbon comprises spcarbon.3. The method of claim 1 , wherein the aerogel comprising carbon is a graphene aerogel.4. The method of claim 1 , wherein the boron oxide is heated to a temperature of at least about 1500° C.5. The method of claim 1 , wherein the boron oxide is heated to a temperature of about 1600° C. to about 1800° C.6. The method of claim 1 , wherein flow rate of the nitrogen-containing gas is about 1000 sccm to about 2000 sccm.7. The method of claim 1 , wherein the nitrogen-containing gas is N.8. The method of claim 1 , wherein the aerogel comprising carbon is substantially free of contact with liquid boron oxide.9. The method of claim 1 ...

FUNCTIONAL COMPOSITE PARTICLES

A complex ceramic particle and ceramic composite material may be made of a pretreated coal dust and a polymer derived ceramic that is mixed together and pyrolyzed in a nonoxidizing atmosphere. Constituent portions of the particle mixture chemically react causing particles to increase in density and reduce in size during pyrolyzation, yielding a particle suitable for a plurality of uses including composite articles and proppants. 1. A composite particle comprises a pyrolyzed ceramic composite core comprised of a first material , wherein the first material is a composite made of a mixture of coal dust preheated in a substantially non-oxidizing atmosphere at a temperature less than 400 degrees centigrade to produce a coal dust additive comprising carbon and organic compounds and a polymer derived ceramic material , the coal dust additive and the polymer derived ceramic material being selected and mixed together such that , when the first material is pyrolyzed in a substantially non-oxidizing atmosphere , the coal dust additive and the polymer derived ceramic material react when pyrolyzed and transform into a ceramic matrix composite.2. The composite particle of claim 1 , further comprising a coating substantially enclosing the pyrolyzed ceramic composite core within the coating.3. The composite particle of claim 2 , wherein the coating is comprised of a polymer derived ceramic material.4. The composite particle of claim 3 , wherein the polymer derived ceramic material of the pyrolyzed ceramic composite core is a silicon-oxy-carbide polymer derived ceramic material.5. The composite particle of claim 4 , wherein the polymer derived ceramic material of the coating is different than the polymer derived ceramic material used in the pyrolyzed ceramic composite core.6. The composite particle of claim 2 , wherein the polymer derived ceramic material of the coating is pyrolyzed in a substantially non-oxidizing atmosphere such that a hard shell substantially encloses the ...

PROCESS FOR PRODUCING COMPOSITE PARTICLES AND INSULATION MATERIAL FOR THE PRODUCTION OF INSULATING PRODUCTS FOR THE BUILDING MATERIALS INDUSTRY, AND CORRESPONDING USES

What are described are a process for producing an insulating product for the construction materials industry or an insulating material as intermediate for production of such a product, and a corresponding insulating material/insulating product. Also described are the use of a matrix encapsulation method for production of composite particles in the production of an insulating product for the construction materials industry or of an insulating material as intermediate for production of such a product, and the corresponding use of the composite particles producible by means of a matrix encapsulation method 1. A process for producing an insulating product for the construction materials industry or an insulating material as intermediate for production of such a product , the method comprising the following steps: (a1) producing droplets of a suspension composed of at least the following starting materials:', (i) one or more substances selected from the group consisting of sheet silicates and clays,', '(ii) additionally one or more density-reducing substances selected from the group consisting of lightweight fillers having a respective bulk density in the range from 10 to 350 g/L, blowing agents and pyrolyzable fillers', 'and', '(iii) one or more nonrefractory solids for reducing the melting point of the composite particles in addition to constituents (i) and (ii),, 'as dispersed phases'}, '(iv) a solidifiable liquid,', 'and as continuous phase'}, '(a2) solidifying the solidifiable liquid, such that the droplets harden to give hardened droplets, and', 'the (i) substance(s) selected from the group consisting of sheet silicates and clays,', 'the (ii) density-reducing substance(s) and', 'the (iii) nonrefractory solid(s)', 'are encapsulated in the solidifying continuous phase,', '(a3) treating the hardened droplets so as to result in said composite particles, the treating comprising a sintering of the hardened droplets., '(a) producing composite particles having a grain size ...

FERRITE SINTERED MAGNET, FERRITE PARTICLE, BONDED MAGNET AND ROTATING ELECTRIC MACHINE

This ferrite sintered magnet comprises ferrite phases having a magnetoplumbite type crystal structure. This magnet comprises an element R, an element M, Fe, Co, B, Mn and Cr, the element R is at least one element selected from rare earth elements including Y, the element M is at least one element selected from the group consisting of Ca, Sr and Ba, with Ca being an essential element, and when an atomic composition of metallic elements is represented by RMFeCo, x, y and m satisfy formulae: 1. A ferrite sintered magnet comprising ferrite phases having a magnetoplumbite type crystal structure ,wherein the ferrite sintered magnet comprises an element R, an element M, Fe, Co, B, Mn and Cr,the element R is at least one element selected from rare earth elements including Y,the element M is at least one element selected from the group consisting of Ca, Sr and Ba, with Ca being an essential element,{'sub': 1-x', 'x', 'm-y', 'y, 'claim-text': [{'br': None, 'i': 'x≤', '0.2≤0.8\u2003\u2003(1)'}, {'br': None, 'i': 'y≤', '0.1≤0.65\u2003\u2003(2)'}, {'br': None, 'i': 'm<', '3≤14\u2003\u2003(3),'}], 'when an atomic composition of metallic elements is represented by RMFeCo, x, y and m satisfy formulae (1), (2) and (3){'sub': 2', '3, 'a content of B is 0.1 to 0.4% by mass in terms of BO,'}a content of Mn is 0.15 to 1.02% by mass in terms of MnO, and{'sub': 2', '3, 'a content of Cr is 0.02 to 2.01% by mass in terms of CrO.'}2. The ferrite sintered magnet according to claim 1 , wherein the ferrite sintered magnet satisfies formulae (4) and (5):{'br': None, 'i': 'x≤', '0.2≤0.55\u2003\u2003(4)'}{'br': None, 'i': 'm<', '7.5<14\u2003\u2003(5).'}3. A rotating electric machine comprising the ferrite sintered magnet according to .4. Ferrite particles comprising ferrite phases having a magnetoplumbite type crystal structure claim 1 ,wherein the ferrite particles comprise an element R, an element M, Fe, Co, B, Mn and Cr,the element R is at least one element selected from rare earth elements ...

FERRITE SINTERED MAGNET, FERRITE PARTICLES, BONDED MAGNET, MOTOR, AND GENERATOR

Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by RAFeCo, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of BO. 1: A ferrite sintered magnet comprising a ferrite phase having a magnetoplumbite-type crystal structure , wherein{'sub': 1-x', 'x', 'm-y', 'y, 'claim-text': [{'br': None, 'i': 'x≤', '0.2≤0.8\u2003\u2003(1)'}, {'br': None, 'i': 'y≤', '0.1≤0.65\u2003\u2003(2)'}, {'br': None, 'i': 'm<', '3≤14\u2003\u2003(3), and'}], 'x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by RAFeCo, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba{'sub': 2', '3, 'a content of B is from 0.1% to 0.6% by mass in terms of BO.'}2: The ferrite sintered magnet according to claim 1 , wherein a content of B is more than 0.2% by mass and 0.4% by mass or less in terms of BO.3: The ferrite sintered magnet according to claim 1 , wherein the following Equations (4) and (5) are satisfied:{'br': None, 'i': 'x<', '0.2≤0.55\u2003\u2003(4)'}{'br': None, 'i': 'm<', '7.5<14\u2003\u2003(5).'}4: A motor comprising the ferrite sintered magnet according to .5: A generator comprising the ferrite sintered magnet according to .6: A ferrite particle comprising a ferrite phase having a magnetoplumbite-type crystal structure claim 1 , wherein{'sub': 1-x', 'x', 'm-y', 'y, 'claim-text': [{'br': None, 'i': 'x≤', '0.2≤0.8\u2003\u2003(1)'}, {'br': None, 'i': 'y≤', '0.1≤0.65\u2003\u2003(2)'}, {'br': None, 'i': '≤m<', ...

REFRACTORY PRODUCT HAVING IMPROVED FLOW

An unshaped product including a particulate mixture containing: a coarse fraction, representing >50%<91% of particulate mixture, in mass percentage, and containing particles size ≧50 μm, “coarse particles”, and matrix fraction, forming remainder up to 100% of particulate mixture, and containing particles sizes <50 μm, product having chemical analysis, in mass percentage based on oxides of product, such: −45%1 mm, in mass percentage based on particulate mixture, matrix fraction having a chemical analysis, in mass percentage based on oxides of matrix fraction, such: AlO+SiO+ZrO>86%, providing 35%86%, provided that 35% Подробнее

BIOCERAMIC COMPOSITIONS

This invention relates to compositions and applications for a bioceramic composition that includes from about 45 to about 55% by weight of kaolinite (AlSiO(OH)); from about 5 to about 15% by weight of tourmaline; from about 3 to about 13% by weight of aluminum oxide (AlO); from about 11 to about 19% by weight of silicon dioxide (SiO); and from about 3 wt % to about 13 wt % zirconium oxide (ZrO). 2. The bioceramic composition of claim 1 , wherein the one additional oxide is zirconium oxide (ZrO).3. The bioceramic composition of claim 2 , wherein the amount of said zirconium oxide (ZrO) is from about 3 wt % to about 13 wt % zirconium oxide (ZrO) by total weight of the composition.4. A method for manufacturing a fabric or a textile article comprising the steps of:{'sub': 2', '2', '5', '4', '2', '2', '3, '(a) forming a mixture consisting of from about 47 wt % to about 53 wt % kaolinite (AlSiO(OH)); from about 5 wt % to about 15 wt % tourmaline; from about 11 wt % to about 19 wt % silicon dioxide (SiO); from about 3 wt % to about 18 wt % of aluminum oxide (AlO), and one additional oxide; and'}(b) applying or incorporating the mixture into the fabric or the textile article.5. The method of claim 4 , provided that the incorporating step comprises silk-screen printing.6. The method of claim 4 , wherein the one additional oxide is: zirconium oxide (ZrO).7. The method of claim 5 , provided that the one additional oxide is from about 3 wt % to about 13 wt % zirconium oxide (ZrO). This application is a continuation of Ser. No. 13/760,546, filed Feb. 6, 2013, which claims the benefit of U.S. Provisional Application No. 61/705,986, filed Sep. 26, 2012, both which are incorporated herein by reference.In 1800, Dr. F. W. Herschel of Great Britain found and reported to the academic world a wavelength ranging from 0.7 to 1000 microns, just beyond visible light, called infrared, which has strong physical properties and great thermal activity. The natural resonant frequency range of ...

ZINC OXIDE VARISTOR AND METHOD FOR MANUFACTURING SAME

Focus is on zinc oxide itself, which is a base material for a zinc oxide varistor (laminated varistor), wherein specified quantities of additives are added to a zinc oxide powder having a crystallite size of 20 to 50 nm, grain diameter of 15 to 60 nm found using the specific surface area BET method, untamped density of 0.38 to 0.50 g/cm, and tap density of 0.50 to 1.00 g/cm. This allows securing of uniformity, high compactness, and high electrical conductivity of a zinc oxide sintered body, and provision of a zinc oxide varistor having high surge resistance. 1. A zinc oxide varistor , comprising zinc oxide (ZnO) as a main component , one or more kinds of additives selected as a grain boundary forming component from a group including bismuth (Bi) and praseodymium (Pr) , and one or more kinds of additives selected as a transition metal element from a group including cobalt (Co) , manganese (Mn) and nickel (Ni);{'sup': 3', '3, 'wherein the zinc oxide has a crystallite size of 20 to 50 nm found by X-ray diffraction, grain diameter of 15 to 60 nm found using a specific surface area BET method, untamped density of 0.38 to 0.50 g/cm, and tap density of 0.50 to 1.00 g/cm.'}2. A zinc oxide varistor , comprising zinc oxide (ZnO) as a main component , one or more kinds of additives selected as a grain boundary forming component from a group including bismuth (Bi) and praseodymium (Pr) , and one or more kinds of additives selected as a transition metal element from a group including cobalt (Co) , manganese (Mn) and nickel (Ni);wherein the zinc oxide has median diameter of 30 to 60 nm found using a dynamic scattering method, cumulant diameter of 40 to 82 nm, and cumulant polydispersity index of 0.05 to 0.20.3. The zinc oxide varistor according to claim 1 , wherein crystallite size when powder of the zinc oxide is sintered at 1000° C. is 70 to 1200 nm claim 1 , and crystallite size when sintered at 1150° C. is 75 to 170 nm.4. The zinc oxide varistor according to claim 3 , wherein ...

ANNEALING SEPARATOR COMPOSITION FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. 1. An annealing separator composition for a grain-oriented electrical steel sheet comprising:on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; andthe remainder being magnesium oxide or magnesium hydroxide.2. The annealing separator composition of claim 1 , further comprising0.1 to 20 wt % of metal hydroxide.3. The annealing separator composition of claim 2 , wherein{'sub': 2', '2', '2', '2', '3', '3', '2, 'the metal hydroxide comprises at least one selected from Ni(OH)2, Co(OH), Cu(OH)2, Sr(OH), Ba(OH), Pd(OH), In(OH), Bi(OH)and Sn(OH).'}4. The annealing separator composition of claim 1 , further comprising0.5 to 10 wt % of ceramic powder.5. The annealing separator composition of claim 4 , wherein{'sub': 2', '3', '2', '2, 'the ceramic powder comprises at least one selected from MnO, AlO, SiO2, TiOand ZrO.'}6. The annealing separator composition of claim 1 , further comprising{'sub': 2', '4', '3', '4', '4, '1 to 10 wt % of Sb(SO), SrSO, BaSOor a combination thereof.'}7. A grain-oriented electrical steel sheet wherein a coating comprising mullite and forsterite is formed on one or both sides of a substrate of a grain-oriented electrical steel sheet.8. The grain-oriented electrical steel sheet of claim 7 , whereinthe coating comprises 0.5 to 50 wt % of Al.9. The grain-oriented electrical steel sheet of claim 7 , whereinthe coating further comprises 3 to 80 wt % of Mg, 3 to 80 wt % of Si, 3 to 80 wt % of O and Fe as the remainder.10. The grain-oriented electrical steel sheet of claim 7 , whereina thickness of the coating is 0.1 to 10 μm.11. The grain-oriented electrical steel sheet of claim 7 , further comprisinga ceramic layer formed on the coating.12. The grain-oriented electrical steel sheet of claim 11 , whereinthe ceramic layer comprises ceramic powder.13. The grain-oriented ...

Piezoelectric material, piezoelectric element, and electronic device

A piezoelectric material that does not contain lead and has excellent piezoelectric constant and mechanical quality factor in a device driving temperature range (−30° C. to 50° C.) is provided. A piezoelectric material includes a main component containing a perovskite metal oxide represented by following general formula (1), and a first auxiliary component containing Mn, wherein an amount of the contained Mn is 0.002 moles or more and 0.015 moles or less relative to 1 mole of the metal oxide. (Ba 1-y B y ) a (Ti 1-x-z Zr x Fe z )O 3   (1) (where 0.010≦x≦0.060, 0.001≦y≦0.015, 0.001≦z≦0.015, 0.950≦y/z≦1.050, and 0.986≦a≦1.020)

MATERIAL INCLUDING BORON SUBOXIDE AND METHOD OF FORMING SAME

A material including a body including BOcan include lattice constant c of at most 12.318. X can be at least 0.85 and at most 1. In a particular embodiment, 0.90≤X≤1. In another particular embodiment, lattice constant a can be at least 5.383 and lattice constant c can be at most 12.318. In another particular embodiment, the body can consist essentially of BO.

TUCKSTONE

Fused tuckstone defining lower and upper surfaces. The lower surface includes a support surface to rest on metallic structure of a glass furnace, a tank surface intended to face an upper edge of a tank of the furnace, and a lower transition surface connecting the support and tank surfaces. The upper surface includes a superstructure surface to receive a side wall of a superstructure of the furnace and an upper transition surface connecting the superstructure and lower surfaces. At least a part of the lower transition surface has a crystal density of more than four times the crystal density at a depth of 4 centimeters below the lower transition surface, a crystal density being evaluated by the number of crystals having a surface area of more than 12 μmper mmof surface after polishing, the crystal density at the depth being evaluated after cutting of the tuckstone. 2. Tuckstone according to claim 1 , wherein at least a part of the upper transition surface is a surface with skin microstructure.3. Tuckstone according to claim 1 , wherein the entire lower surface is a surface with skin microstructure.4. Tuckstone according to claim 1 , wherein at least a part of the superstructure surface has a crystal density of less than four times the density at depth of 4 centimeters below said superstructure surface.5. Tuckstone according to claim 1 , wherein a layer of an interfacing material claim 1 , which is deformable and/or has a thermal conductivity of less than 1.0 W·m·K claim 1 , is arranged on at least a part of a surface with skin microstructure.6. Tuckstone according to claim 1 , having a chemical composition in mass percentage based on oxides such that: AlO+ZrO+SiO>80.0%.7. Tuckstone according to claim 1 , comprising claim 1 , in mass percentage based on oxides claim 1 , more than 0.5% and less than 10.0% of a zirconia stabilizer.8. Tuckstone according to claim 1 , having a chemical composition in mass percentage based on oxides such that claim 1 , for a total of 100 ...

SOL-GEL METHOD FOR PREPARATION OF CERAMIC MATERIAL

A process for producing a ceramic material including providing an aqueous solution comprising at least one transition metal ion and one or more further transition metal ion and/or one or more additional ion; adding to the aqueous solution a quaternary ammonium or phosphonium hydroxide comprising at least one alkyl group containing about 8 or more carbon atoms to form a combined aqueous solution; mixing the combined aqueous solution to form a gel; transferring the formed gel to a furnace; and heating the formed gel to a temperature sufficient for a time sufficient to calcine the gel to form a solid ceramic material. The process in accordance with the present invention provides an improved ceramic material, in some embodiments of which is suitable for use in the cathode material of a lithium ion battery. 1. A process for producing a ceramic material comprising:providing an aqueous solution comprising at least one transition metal ion and one or more further transition metal ion and/or one or more additional ion;adding a quantity of nitrate ions to the aqueous solution;adding to the aqueous solution a quaternary ammonium or phosphonium hydroxide comprising at least one alkyl group containing about 8 or more carbon atoms to form a combined aqueous solution;mixing the combined aqueous solution to form a gel;transferring the formed gel to a furnace; andheating the formed gel to a temperature sufficient for a time sufficient to calcine the gel to form a solid ceramic material.2. The process according to wherein the formed gel is transferred directly to the furnace without an intervening step of water or solvent removal.3. The process according to wherein the aqueous solution further comprises a lithium ion.4. The process according to wherein the at least one transition metal salt or oxide comprises one or more ion of Group 3-12 of the IUPAC periodic table5. The process according to wherein the aqueous solution further comprises at least one additional salt or oxide ...

THERMISTOR MATERIAL AND METHOD OF PREPARING THE SAME

A thermistor material and a method for preparing a thermistor material are provided. The thermistor material is prepared by mixing and heating a mixture containing BaTiO, BO, SiO, LiO, PO, CsO, NdO, AlOand TiO. 1. A method for preparing a thermistor material , comprising steps of:{'sub': 3', '2', '3', '2', '2', '2', '5', '2', '2', '3', '3', '2', '3', '2', '2', '2', '5', '2', '2', '3, 'providing a first mixture comprising BaTiO, BO, SiO, LiO, PO, CsO and NdO, wherein with respect to 100 weight parts of the first mixture, BaTiOis about 94.85 weight parts to about 97.75 weight parts, BOis about 0.4 weight parts to about 2.5 weight parts, SiOis about 0.5 weight parts to about 0.9 weight parts, LiO is about 0.08 weight parts to about 0.2 weight parts, POis about 0.2 weight parts to about 0.3 weight parts, CsO is about 0.6 weight parts to about 0.725 weight parts, and NdOis about 0.325 weight parts to about 0.565 weight parts;'}sintering the first mixture at about 800 degree Celsius to about 900 degree Celsius to form a first powder material;{'sub': 2', '3', '2', '3', '2', '3', '2, 'mixing the first powder material with a second mixture comprising AlOand TiO, wherein with respect to 100 weight parts of BaTiO, AlOis about 0.06 weight parts to about 0.08 weight parts, and TiOis about 0.07 weight parts to about 0.08 weight parts to form a second power material;'}granulating, pelleting and molding the second powder material to form a molded material; andsubjecting the molded material to a heat treatment.2. The method of claim 1 , further comprising:subjecting the first mixture to milling prior to the sintering step, andsubjecting the second power material to milling prior to the granulating step.3. The method of claim 1 , wherein in the mixing step claim 1 , the first powder material is mixed with the second mixture and a sintering additive.4. The method of claim 3 , wherein the sintering additive comprises an acid silica sol.5. The method of claim 1 , wherein the granulating ...

Granules containing agglomerated bulk material

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt. 114.-. (canceled)15. Granules containing at least one agglomerated reactive bulk material and a binder matrix , wherein the binder matrix contains an inorganic salt as the binder , wherein the reactive bulk material is a bulk material that undergoes a violent and immediate chemical reaction when granulated in the presence of water and the proportion of bulk material in the granules is in the range from 85 to 99% and the melting point of the binder is below 600° C. and wherein the apparent density of the granules is in the range from 0.7 to 1.2 , wherein the binder contains one or more of calcium nitrate , and/or boron trioxide.16. Granules according to claim 15 , wherein the melting point of the binder is lower than the melting point of the reactive bulk material.17. Granules according to claim 15 , wherein the melting point of the binder is in the range from 100° C. to 600° C.18. Granules according to claim 15 , wherein the bulk material contains a reactive lime-based material.19. Granules according to claim 15 , wherein the binder contains one or more selected from claim 15 , calcium claim 15 , boron claim 15 , nitrogen claim 15 , or oxygen.20. Granules according to claim 15 , wherein the bulk material has an average grain size of 0 to 100 μm claim 15 , and/or a D50 value of 40 to 60 μm.21. Granules according to claim 15 , wherein the granules have a grain size of 1 mm or above.22. Granules according to claim 15 , wherein the proportion of binder in the granules is in the range from 1 to 15%.23. Granules according to claim 15 , wherein the ratio of bulk material to binder varies in the range from 1:5 to 1:100.246. Method for the improvement of steel or refractory comprising adding granules according to claim claim 15 , in the manufacture of steel or refractory.25. Granules according to claim 15 ...

Multilayer Component and Process for Producing Multilayer Component

A multilayer component and a mathod for producing a multilayer component are disclosed. In an embodiment the multilayer component includes a ceramic main element being a varistor ceramic and at least one metal structure, wherein the metal structure is cosintered, and wherein the main element is doped with a material of the metal structure in such a way that a diffusion of the material from the metal structure into the main element during a sintering operation is reduced. 115-. (canceled)16. A multilayer component comprising:a ceramic main element being a varistor ceramic; andat least one metal structure, wherein the metal structure is cosintered, and wherein the main element is doped with a material of the metal structure in such a way that a diffusion of the material from the metal structure into the main element during a sintering operation is reduced.17. The multilayer component according to claim 16 , wherein the main element is doped with 0.1 to 1 mol per cent of a chemical compound of the material of the metal structure.18. The multilayer component according to claim 16 , wherein the main element comprises ZnO.19. The multilayer component according to claim 16 , wherein the main element comprises bismuth oxide claim 16 , praseodymium oxide or antimony oxide.20. The multilayer component according to claim 16 , wherein the main element comprises one or more of the materials CoO claim 16 , MnO claim 16 , SiO claim 16 , CrO claim 16 , BO claim 16 , AlOor NiO.21. The multilayer component according to claim 16 , wherein the main element has the composition:≧90 mol % of ZnO,{'sub': 2', '3', '2', '3, 'from 0.5 to 5 mol % of SbOor BiO,'}{'sub': 3', '4', '2', '3', '2', '2', '3, 'from 0.05 to 2 mol % of CoO, MnO, SiOand/or CrO,'}{'sub': 2', '3', '2', '3, '<0.1 mol % of BO, AlOand/or NiO.'}22. The multilayer component according to wherein the main element is a ceramic sintered with an aid of liquid phases.23. The multilayer component according to claim 16 , wherein the ...

Method for preparing composite materials with an oxide matrix and oxide reinforcements by means of a calefaction process

Method for the preparation, by means of a heating technique, of a composite material composed of a matrix of at least a first oxide of at least one metal and/or at least one metalloid reinforced by reinforcements in at least a second oxide of at least one metal and/or at least one metalloid, characterised in that the following successive steps are carried out: the reinforcements are placed in at least one liquid precursor of the first oxide of at least one metal and/or at least one metalloid; said reinforcements and the liquid precursor are heated so as to form the first oxide by means of the thermal decomposition of said liquid precursor, and to deposit the first oxide thus formed around the reinforcements and between the reinforcements thus forming the matrix.

Process For Manufacturing Carbon Anodes For Aluminium Production Cells And Carbon Anodes Obtained From The Same

There is provided a process for manufacturing a carbonaceous anode for an electrolysis cell for the production of aluminium. The process comprises contacting coke particles with a boron-containing solution to obtain boron-impregnated coke particles, mixing the boron-impregnated coke particles with coal tar pitch to form an anode paste, and forming a green anode with the anode paste. A carbonaceous anode for an electrolysis cell for the production of aluminium is also provided, which comprises at least a first fraction of coke particle, a second fraction of coke particles and coal tar pitch, wherein at least the first faction of coke particles comprises boron-impregnated coke particles, the boron-impregnated coke particles being distributed throughout the carbonaceous anode. The carbonaceous anode presents good resistivity towards air and COoxidation, which translates into less dusting of the anode, thus improving its integrity throughout its lifetime. 1. A process for manufacturing a carbonaceous anode for an electrolysis cell for the production of aluminium comprising:contacting coke particles with a boron-containing solution to obtain boron-impregnated coke particles;mixing the boron-impregnated coke particles with coal tar pitch to form an anode paste; andforming a green anode with the anode paste.2. The process of claim 1 , comprising:contacting at least a first fraction of coke particles with the boron-containing solution to obtain a first fraction of boron-impregnated coke particles;mixing the first fraction of boron-impregnated coke particles, a second fraction of coke particles and the coal tar pitch to form the anode paste; andforming the green anode with the anode paste.3. The process of claim 2 , wherein contacting comprises contacting the first fraction of coke particles and a second fraction of coke particles with the boron-containing solution to obtain the first fraction of boron-impregnated coke particles and a second fraction of boron-impregnated ...

Nitride-based red-emitting phosphors in rgb (red-green-blue) lighting systems

Embodiments of the present invention are directed to nitride-based, red-emitting phosphors in red, green, and blue (RGB) lighting systems, which in turn may be used in backlighting displays and warm white-light applications. In particular embodiments, the red-emitting phosphor is based on CaAlSiN 3 type compounds activated with divalent europium. In one embodiment, the nitride-based, red emitting compound contains a solid solution of calcium and strontium compounds (Ca,Sr)AlSiN 3 :Eu 2+ , wherein the impurity oxygen content is less than about 2 percent by weight. In another embodiment, the (Ca,Sr)AlSiN 3 :Eu 2+ compounds further contains a halogen in an amount ranging from about zero to about 2 atomic percent, where the halogen may be fluorine (F), chlorine (Cl), or any combination thereof. In one embodiment at least half of the halogen is distributed on 2-fold coordinated nitrogen (N2) sites relative to 3-fold coordinated nitrogen (N3) sites.

Polysilane-polycarbosilane copolymer solutions and low-oxygen ceramic shaped bodies produced therefrom with compositions close to SiC

Die Erfindung betrifft ein Verfahren zur Herstellung einer Polysilan-Polycarbosilan-Copolymer-Lösung, das die Bereitstellung eines Polysilans, erhalten durch Disproportionierung eines oder eines Gemischs mehrerer Methylchlordisilane der Zusammensetzung Si¶2¶Me¶n¶Cl¶6-n¶ mit einer Lewis-Base als Katalysator, eine thermische Nachvernetzung des Polysilans zu einem unschmelzbaren, in indifferenten Lösemitteln löslichen Polysilan-Polycarbosilan-Copolymer sowie die Herstellung der genannten Lösung durch Lösen des Polysilan-Polycarbosilan-Copolymers in einem indifferenten Lösemittel umfasst. Außerdem betrifft die Erfindung ein Verfahren zur Herstellung von sauerstoffarmen Keramikfasern und anderen Formkörpern mit einer Zusammensetzung nahe SiC. Das Verfahren zur Herstellung der Fasern umfasst die Herstellung einer Polysilan-Polycarbosilan-Copolymer-Lösung, das Verspinnen dieser Lösung zu Grünfasern nach dem Trockenspinnverfahren sowie die Pyrolyse der getrockneten Grünfasern unter Inertgasatmosphäre oder reduzierender Atmosphäre. The invention relates to a process for the preparation of a polysilane-polycarbosilane copolymer solution which comprises providing a polysilane obtained by disproportionation of one or a mixture of several methylchlorodisilanes of the composition Si¶2¶Me¶n¶Cl¶6-n¶ with a Lewis Base as a catalyst, a thermal post-crosslinking of the polysilane to an infusible, soluble in indifferent solvents polysilane-polycarbosilane copolymer and the preparation of said solution by dissolving the polysilane-polycarbosilane copolymer in an inert solvent. In addition, the invention relates to a process for the production of low-oxygen ceramic fibers and other moldings having a composition close to SiC. The process for producing the fibers comprises preparing a polysilane-polycarbosilane copolymer solution, spinning this solution into green fibers by the dry-spinning method, and pyrolysis of the dried green fibers under an inert gas atmosphere or a reducing ...