Abstract: A batch composition containing pre-reacted inorganic spheroidal particles and pore-former spheroidal particles. The pre-reacted inorganic spheroidal particles have a particle size distribution wherein 10 ?m?DI50?50 ?m, and DIb?2.0, and the pore-former spheroidal particles have a particle size distribution wherein 0.40 DI50?DP50?0.90 DI50, and DPb?1.32, wherein DI50 is a median particle diameter of the distribution of pre-reacted inorganic spheroidal particles, DP50 is a median particle diameter of the pore-former particle size distribution, DIb is a breadth factor of the pre-reacted particle size distribution of the pre-reacted inorganic spheroidal particles, and DPb is a breadth factor of the pore-former particle size distribution. Also, green honeycomb bodies manufactured from the batch compositions, and methods of manufacturing a honeycomb body using the batch compositions, are provided.

Abstract: A fluid heating component including: a pillar-shaped member made of ceramics and formed with through channels through which a fluid passes, and a conductive coating layer disposed on at least a part of a circumferential surface of the pillar-shaped member, wherein the conductive coating layer is disposed on coats the whole circumference of a cut surface of the pillar-shaped member in a state where the conducive coating layer is electrically connected, in the cut surface of the pillar-shaped member which is perpendicular to a passing direction of the fluid.

Abstract: The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is in the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500° C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

Abstract: A ceramic honeycomb structure comprising large numbers of cells partitioned by porous cell walls, the cell walls having (a) porosity of 50-80%, and when measured by mercury porosimetry, (b) a median pore diameter being 25-50 ?m, (c) (i) a cumulative pore volume in a pore diameter range of 20 ?m or less being 25% or less of the total pore volume, (ii) a cumulative pore volume in a pore diameter range of more than 20 ?m and 50 ?m or less being 50% or more of the total pore volume, and (iii) a cumulative pore volume in a pore diameter range of more than 50 ?m being 12% or more of the total pore volume.

Abstract: An alumina sintered body according to the present invention includes a surface having a degree of c-plane orientation of 5% or more, the degree of c-plane orientation being determined by a Lotgering method using an X-ray diffraction profile obtained through X-ray irradiation at 2?=20° to 70°. The alumina sintered body contains Mg and F, a Mg/F mass ratio is 0.05 to 3500, and a Mg content is 30 to 3500 ppm by mass. The alumina sintered body has a crystal grain size of 15 to 200 ?m. When a field of view of 370.0 ?m long×372.0 ?m wide is photographed with a 1000-fold magnification and the photograph is visually observed, a number of pores having a diameter of 0.2 to 0.6 ?m is 250 or less.

Abstract: A method for forming an optical window. In one example, the method includes depositing a layer of eutectic bonding material onto a first surface of a first section of window material, positioning a second surface of a second section of window material onto the layer of eutectic bonding material such that the first surface is disposed opposite the second surface, and heating the eutectic bonding material to a temperature above a eutectic temperature of the eutectic bonding material and below a melting temperature of the window material for a predetermined length of time to form an optical window. The window material of the first section and the second section may be transparent to infrared radiation and comprise aluminum.

Abstract: A process for capturing or concentrating microorganisms for detection or assay comprises (a) providing a concentration agent that comprises an amorphous metal silicate and that has a surface composition having a metal atom to silicon atom ratio of less than or equal to about 0.5, as determined by X-ray photoelectron spectroscopy (XPS); (b) providing a sample comprising at least one microorganism strain; and (c) contacting the concentration agent with the sample such that at least a portion of the at least one microorganism strain is bound to or captured by the concentration agent.

Abstract: Comminuted pre-mixtures for technical ceramics production, and ceramic bodies made therefrom, the comminuted pre-mixtures being comprised of cellulosic components and alumina source components and the bodies being produced by compounding the comminuted pre-mixtures with powdered inorganic components into batch mixtures, adding liquids to the batch mixtures to form plastic batches, forming the plastic batches into shaped bodies, and heating the shaped bodies to form the ceramic bodies.

Abstract: An alumina sintered body contains alumina as a main component and titanium. The alumina sintered body further contains at least one element selected from the group consisting of lanthanum, neodymium, and cerium. Aluminum is contained in the alumina sintered body in an amount such that a ratio of aluminum oxide to total oxides in the alumina sintered body becomes 93.00 to 99.85% by weight where the total oxides are defined as a total amount of all oxides contained in the alumina sintered body. Titanium is contained in an amount such that a ratio of titanium oxide to the total oxides becomes 0.10 to 2.00% by weight. Lanthanum, neodymium, and cerium are contained in a combined amount such that a ratio of the combined amount to the total oxides becomes 0.05 to 5.00% by weight. Volume resistivity is 1×105 to 1×1012 ?·cm at room temperature.

Abstract: A non-conductive ceramic material contains a base ceramic material and at least one other ceramic material having a lower coefficient of thermal expansion than that of the base material so that the coefficient of thermal expansion of the non-conductive ceramic material is identical to that of a metallic material to which it will be matched. Methods of making and using same are disclosed.

Abstract: The disclosure relates to ceramic-body-forming batch materials comprising at least one pore former and inorganic batch components comprising at least one silica source having a specified particle size distribution, methods of making ceramic bodies using the same, and ceramic bodies made in accordance with said methods. The disclosure additionally relates to methods for reducing pore size variability in ceramic bodies and/or reducing process variability in making ceramic bodies.

Abstract: The ceramic clay is provided by kneading a forming raw material containing a ceramic forming material. The forming raw material contains, in addition to the ceramic forming material, a layered double hydroxide represented by a predetermined chemical formula in an amount of from 0.01 to 5 mass % based on the total amount of the layered double hydroxide and the ceramic forming material. The layered double hydroxide turns into a gel when dispersed in water, and when the layered double hydroxide is dispersed in water at a concentration of 6 mass %, the layered double hydroxide has a viscosity of from 1000 to 20000 mPa·s.

Abstract: The present disclosure relates to cordierite-forming batch materials and methods of using the same, and in particular batch materials for forming porous cordierite bodies suitable for treating engine emissions. The batch materials include sources of magnesium, alumina, silica, and high BET specific surface area raw kaolin clay. In some embodiments, the BET specific surface area of the raw kaolin clay is greater than 22 m2/g. In other embodiments, the BET specific surface area of the raw kaolin clay is greater than 13 m2/g, and the source of magnesium oxide and the source of non-kaolin clay source of silica both have relatively coarse particle size.

Abstract: The invention provides a fused cast refractory product having the following mean chemical composition by weight, as a percentage by weight based on the oxides: 25%<MgO<30%; 70%<Al2O3<75%; other species: <1%. The invention is applicable to a regenerator associated with a soda-lime glass fusion furnace operating under reducing conditions.

Abstract: To provide an aluminum magnesium titanate crystal structure which can be used stably in variable high temperatures, because of its excellent heat resistance, thermal shock resistance, high thermal decomposition resistance and high mechanical property, and a process for its production. An aluminum magnesium titanate crystal structure, which is a solid solution wherein at least some of Al atoms in the surface layer of aluminum magnesium titanate crystal represented by the empirical formula MgxAl2(1?x)Ti(1+x)O5 (wherein 0.1?x<1) are substituted with Si atoms, and which has a thermal expansion coefficient of from ?6×10?6 (1/K) to 6×10?6 (1/K) in a range of from 50 to 800° C. at a temperature raising rate of 20° C./min, and a remaining ratio of aluminum magnesium titanate of at least 50%, when held in an atmosphere of 1,100° C. for 300 hours.

Abstract: A molten and cast refractory material having a chemical composition, in weight percent on the basis of oxides, of: —Al2O3: the remainder up to 100%; —MgO: 28% to 50%; —CuO: 0.05% to 1.0%; —B2O3: ?1.0%; —SiO2: <0.5%; —Na2O+K2O: <0.3%; —CaO: <1.0%; —Fe2O3+TiO2: <0.55%; —and other oxide species: <0.5%.

Abstract: Disclosed are ceramic articles comprising ceramic honeycomb bodies and an aqueous composition, for example in the form of a cold-set plug, as well as processes for preparing ceramic articles and processes for making an aqueous composition for use with ceramic articles, for example as a cold-set plug composition.

Abstract: The disclosure relates to ceramic-body-forming batch materials comprising at least one pore former and inorganic batch components comprising at least one silica source having a specified particle size distribution, methods of making ceramic bodies using the same, and ceramic bodies made in accordance with said methods. The disclosure additionally relates to methods for reducing pore size variability in ceramic bodies and/or reducing process variability in making ceramic bodies.

Abstract: Provided herein are methods and apparatus to remove unwanted elements in commercial powders, and particularly in commercial powders that include one or more of a crystalline ceramic oxide. The methods involve treating powders in reduced pressure atmosphere, such as a vacuum, with or without heating, for a period of time sufficient to remove impurities. Impurities and contaminants, including anionic species, are removed from the powders without any undesirable changes in the physical characteristics of the starting material, such as particle size and particle size distribution, surface area, and volume, for example. The resulting purified powder starting material can be consolidated without the need for any sintering aids such as LiF to produce nearly colorless, extremely transparent polycrystalline articles that approach identical properties and performance of single crystal spinels.

Abstract: Disclosed is the preparation of sintered cordierite-based glass-ceramic bodies via a procedure which uses three all natural starting materials which are white sand, kaolin clay and magnesite. These three raw materials are combined in relative amounts which form, upon subsequent mixing and heating, a specific mixture of oxides of silicon, aluminum and magnesium. Upon melting at 1500-1550° C., this combination of raw materials forms transparent brown glass which after solidification by quenching is then crushed and reduced to grains having a median particle size less than 65 microns. These brown glass grains are consolidated, for example by compaction, to form a green body for sintering. Sintering of the green body at temperatures between about 1000° C. and 1375° C. for from 2 to 5 hours produces glass-ceramic bodies containing a polycrystalline material which comprises mostly material of the cordierite crystal structure.

Abstract: Porous spodumene-cordierite honeycomb bodies of high strength but low volumetric density, useful for the manufacture of close-coupled engine exhaust converters, gasoline engine particulate exhaust filters, and NOx integrated engine exhaust filters, are provided through the reactive sintering of batches comprising sources of magnesia, alumina and silica together with a lithia source, such as a spodumene or petalite ore.

Abstract: Disclosed is a corrosion resistant member comprising a sintered material having an ?-Al2O3 crystal and an YAG (yttrium-aluminum-garnet) crystal. The corrosion resistant member contains metal elements, 70 to 98% by mass (inclusive) of Al in terms of Al2O3 and 2 to 30% by mass of Y in terms of Y2O3. The corrosion resistant member has a peak intensity ratio I116/I104 within the range from 0.94 to 1.98, preferably. 2.21 or higher, wherein I116 and I104 represent peak intensities attributed to the (116) face and the (104) face, respectively, of an ?-Al2O3 crystal as measured by X-ray diffractometry on its surface layer.

Abstract: The present invention is a process for producing an aluminum titanate-based ceramics comprising a step of firing a starting material mixture containing a titanium source powder, an aluminum source powder, and a copper source.

Abstract: Comminuted pre-mixtures for technical ceramics production, and ceramic bodies made therefrom, the comminuted pre-mixtures being comprised of cellulosic components and alumina source components and the bodies being produced by compounding the comminuted pre-mixtures with powdered inorganic components into batch mixtures, adding liquids to the batch mixtures to form plastic batches, forming the plastic batches into shaped bodies, and heating the shaped bodies to form the ceramic bodies.

Abstract: An in-situ method for nanomixing magnesium aluminate spinel nanoparticles with a uniformly distributed controlled concentration of nanoparticles of an inorganic sintering aid, such as LiF, to produce ready-to-sinter spinel powder. The spinel-sintering aid nanomixture is formed by induced precipitation of the sintering aid nanoparticles from a dispersion of the spinel nanoparticles in an aqueous solution of the sintering aid, followed by separation, drying and deagglomeration of the spinel-sintering aid nanomixed product.

Abstract: It is provided a high-temperature assembly that is favorable for increasing the sealing property at the boundary area between a first member and a second member that are used in a high-temperature environment. Further it is provided a method for producing the high-temperature assembly, and a heat-resistant sealing material. The heat-resistant sealing material, which is disposed at the boundary area between a first member and a second member, comprises ceramic particles made of a plurality of materials which form a ceramics the volume of which increases when the ceramics is synthesized.

Abstract: A refractory object can include a beta alumina. In an embodiment, the refractory object is capable of being used in a glass fusion process. In another embodiment, the refractory object can have a total Al2O3 content of at least 10% by weight. Additionally, a Mg—Al oxide may not form along a surface of the refractory object when the surface is exposed to a molten glass including an Al—Si—Mg oxide. In a particular embodiment, a refractory object can be in the form of a glass overflow forming block used to form a glass object that includes an Al—Si—Mg oxide. When forming the glass object, the glass material contacts the beta alumina, and during the flowing of the glass material, a Mg—Al oxide does not form along the beta alumina at the surface.

Abstract: A cement mixture suitable for use with ceramic honeycomb bodies, such as for forming an outer layer on the outer periphery of the honeycomb body, or for forming plugs in the honeycomb body. The cement mixture, when fired, preferably exhibits low coefficient of thermal expansion and high strength. The cement mixture can be applied to a green honeycomb body and simultaneously fired with the green body or can be applied to an already fired ceramic honeycomb body and then fired. Includes cement mixture comprising a plurality of inorganic components comprising talc, kaolin, alumina, silica, and aluminum hydroxide, wherein the mixture contains less than or equal to 18.0% silica and greater than or equal to 17.0% aluminum hydroxide, in percent by weight of the inorganic components.

Abstract: Methods of making and compositions of dense sintered ceramic nano- and micro-composite materials that are highly stable in a variety of conditions and exhibit superior toughness and strength. Liquid feed flame spray pyrolysis techniques form a plurality of nanoparticles (e.g., powder), each having a core region including a first metal oxide composition comprising Ce and/or Zr or other metals and a shell region including a second metal oxide composition comprising Al or other metals. In certain aspects, the core region comprises a partially stabilized tetragonal ZrO2 and the shell region comprises an ?-Al2O3 phase. The average actual density of the ceramic after sintering is greater than 50% and up to or exceeding 90% of a theoretical density of the ceramic.

Abstract: The present invention is intended to drastically improve a precision polishing characteristic of a cordierite-based sintered body which has low thermal expansibility, high dimensional long-term stability and high rigidity (high elastic modulus). The cordierite-based sintered body comprises cordierite as primary components, and one or more selected from the group consisting of La, Ce, Sm, Gd, Dy, Er, Yb and Y in an oxide-equivalent amount of 1 to 8 mass %, without any crystal phase other than a cordierite crystal phase. A mass ratio of primary components of the cordierite satisfies the following relations: 3.85?SiO2/MgO?4.60, and 2.50?Al2O3/MgO?2.70, and the cordierite-based sintered body after being subjected to precision polishing has a precisely polished surface with an average surface roughness (Ra) of 1 nm or less.

Abstract: This invention relates to thermal spray composite coatings on a metal or non-metal substrate. The thermal spray composite coatings comprise a ceramic composite coating having at least two ceramic material phases randomly and uniformly dispersed and/or spatially oriented throughout the ceramic composite coating. At least a first ceramic material phase is present in an amount sufficient to provide corrosion resistance to the ceramic composite coating, and at least a second ceramic material phase is present in an amount sufficient to provide plasma erosion resistance to the ceramic composite coating. This invention also relates to methods of protecting metal and non-metal substrates by applying the thermal spray coatings. The composite coatings provide erosion and corrosion resistance at processing temperatures higher than conventional processing temperatures used in the semiconductor etch industry, e.g., greater than 100° C.

Abstract: A ceramic substrate is provided as one having a large coefficient of thermal expansion ?, having properties suitable for use as a high-frequency substrate, being capable of being fired at a low temperature, and having an excellent substrate strength. The ceramic substrate has a main composition containing Mg2SiO4 and a low-temperature-fired component, has the coefficient of thermal expansion a of not less than 9.0 ppm/° C., and contains up to 25 vol. % (excluding zero) ZnAl2O4 or up to 7 vol. % (excluding zero) Al2O3. A dielectric-porcelain composition is provided as one being capable of being fired at a temperature lower than a melting point of an Ag-based metal and being capable of demonstrating a sufficient bending strength even through firing at a low firing temperature. The dielectric-porcelain composition contains Mg2SiO4 as a major component and contains a zinc oxide, a boron oxide, an alkaline earth metal oxide, a copper compound, and a lithium compound as minor components.

Abstract: A molten and cast refractory material having a chemical composition, in weight percent on the basis of oxides, of: —Al2O3: the remainder up to 100%; —MgO: 28% to 50%; —CuO: 0.05% to 1.0%; —B2O3: ?1.0%; —SiO2: <0.5%; —Na2O+K2O: <0.3%; —CaO: <1.0%; —Fe2O3+TiO2: <0.55%; —and other oxide species: <0.5%.

Abstract: Fused particles containing, by weight percent: more than 15% but less than 55% of Al2O3; more than 20% but less than 45% of TiO2; more than 3% but less than 30% of SiO2; less than 20%, in total, of at least one oxide selected from the group consisting of ZrO2, Ce2O3, and HfO2; less than 1% of MgO; and more than 1% but less than 15%, in total, of at least one selected from the group consisting of CaO, Na2O, K2O, SrO, B2O3, and BaO. Also, a ceramic product or material obtained by sintering the fused particles.

Abstract: A transmitting optical element of polycrystalline material that includes crystallites of magnesium spinel MgAl2O4 or lutetium-aluminum garnet Lu3Al5O12, wherein the polycrystalline material includes an average total concentration of foreign element contamination caused by Y, Sc, Co, Ni, Zr, Mo, Sn and/or Nb of less than 50 ppm, preferably of less than 20 ppm, and more preferably of less than 15 ppm.

Abstract: The present invention provides a fused ceramic particle, having the following chemical composition, in percentages by weight based on the oxides and for a total of 100%: 50%<ZrO2+HfO2<70%; 10%<SiO2<30%; 6.5%<MgO<9.5%; Al2O3 in a quantity such that the MgO/Al2O3 weight ratio is in the range 2.4 to 6.6; 0.1%<Y2O3; CeO2<10%; and less than 0.6% of other oxides. Use in particular as milling agents, wet medium dispersion agents, propping agents, heat exchange agents, or for the treatment of surfaces.

Abstract: Disclosed are cements for ceramic honeycomb bodies. Such cements can be applied to a fired ceramic honeycomb body then fired, or can be applied to an unfired (green) honeycomb body and co-fired with the green honeycomb body. The cement can also be used to plug one or more cells in a honeycomb body, wherein the cement can be inserted into a green or a fired ceramic honeycomb body, then fired. Also disclosed are methods of manufacturing a ceramic honeycomb article with the cement.

Abstract: A high-temperature, heat-resistant fill material is disclosed. The high-temperature, heat-resistant fill material includes an alumina refractory waste material having one or more of a used alumina-magnesium-carbon material, a used high-alumina material and a used fused-grain alumina material is disclosed. A method for method for manufacturing a material is also disclosed.

Abstract: A method for manufacturing cordierite ceramics is provided, including forming and heating a cordierite-forming raw material containing ?-alumina. The degree of orientation, expressed by (I006/(I300+I006), where Ihkl is height of X-ray diffraction intensity of an hkl-face of an ?-alumina crystal, by X-ray diffraction measurement of an ?-alumina crystal in a formed article of the raw material for forming cordierite is 0.10 or more.

Abstract: The present invention relates to the machine building industry and it is used for coating of friction surfaces by triboceramics to decrease wear and to reduce the friction coefficient. The triboceramic compound contains oxides—magnesium oxide MgO, silica SiO2, alumine Al2O3, calcium oxide CaO, ferric oxide Fe2O3, being in the chemical composition of serpentine and talc, the natural and/or synthesized heat unprocessed and/or dehydrated minerals—serpentine, talc, clinochlore, magnesite, quartz and aluminium hydroxide are introduced forming a mixture with the following composition of oxides, in mass %: SiO2-46-54; MgO-26-32, Al2O3-2-5; Fe2O3-1.0-1.5; CaO-0.1-0.3, water H2O-5 or less.

Abstract: A substrate for a heating assembly comprising a mixture of a mica material with an electrically insulating material, the substrate having a thermal coefficient of expansion that is higher than pure mica. A method of manufacturing the substrate is also disclosed.

Abstract: A spark plug includes an insulator formed of a ceramic material. The ceramic material comprises Al2O3 in an amount of 98.00 wt % to 99.50 wt %; Group 2 oxides in an amount of 0.16 wt % to 0.70 wt %; SiO2 in an amount of 0.25 wt % to 0.75 wt %, Group 4 oxides in an amount of 0.01 wt % to 0.16 wt %, Group 1 oxides in an amount less than 0.0060 wt %, and P2O5 in an amount of less than 0.0040 wt %. The Al2O3 is formed of particles having a D50 median particle size by volume of 1.2 ?m to 1.8 ?m. The ceramic material is pressed, sintered, and formed to a predetermined shape. The sintered ceramic material includes a glass phase comprising the Al2O3, Group 2 oxides, and SiO2. The sintered ceramic material also includes secondary crystals of calcium hexa-aluminate (CaAl12O19) spinel (MgAl2O4), anorthite (CaAl2Si2O8), and mullite (Al6Si2O13).

Abstract: A monolithic refractory material is provided by a method including the steps of kneading cordierite powder having a median diameter in a range of 10 to 50 ?m, and having a sharp mountain-like particle size distribution in which the content of particles smaller than 10 ?m is 1% or more to 36% or less, the content of particles ranging from 10 ?m or more to 50 ?m or less is 50% or more to 75% or less, and the content of particles of 51 ?m or more is 1% or more to 14% or less, and a solvent including water and alumina sol or silica sol solution.

Abstract: A high-temperature, heat-resistant fill material is disclosed. The high-temperature, heat-resistant fill material includes an alumina refractory waste material having one or more of a used alumina-magnesium-carbon material, a used high-alumina material and a used fused-grain alumina material is disclosed. A method for method for manufacturing a material is also disclosed.

Abstract: A method for manufacturing an alumina sintered body of the present invention comprises: (a) forming a mixed powder containing at least Al2O3 and MgF2 or a mixed powder containing Al2O3, MgF2, and MgO into a compact having a predetermined shape; and (b) performing hot-press sintering of the compact in a vacuum atmosphere or a non-oxidizing atmosphere to form an alumina sintered body, in which when a amount of MgF2 to 100 parts by weight of Al2O3 is represented by X (parts by weight), and a hot-press sintering temperature is represented by Y (° C.), the hot-press sintering temperature is set to satisfy the following equations (1) to (4) 1,120?Y?1,300??(1) 0.15?X?1.89??(2) Y??78.7X+1,349??(3) Y??200X+1,212??(4).

Abstract: Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of the same.

Abstract: A non-conductive ceramic material contains a base ceramic material and at least one other ceramic material having a lower coefficient of thermal expansion than that of the base material so that the coefficient of thermal expansion of the non-conductive ceramic material is identical to that of a metallic material to which it will be matched. Methods of making and using same are disclosed.

Abstract: A substrate (1) for thermoelectric conversion modules has a ceramic material as a main component and has flexibility. A thermoelectric conversion module (2) has a plurality of thermoelectric elements (3, 4) arranged in the longitudinal direct of the substrate (1), at least on one surface of the substrate (1), so that the longitudinal directions of the thermoelectric elements (3, 4) are along the width direction of the substrate (1). Electrodes (5), which electrically connect the thermoelectric elements (3, 4) in series, are arranged on the end portions of the thermoelectric elements (3, 4).

Abstract: The invention provides a fused cast refractory product having the following mean chemical composition by weight, as a percentage by weight based on the oxides: 25%<MgO<30%; 70%<Al2O3<75%; other species: <1%. The invention is applicable to a regenerator associated with a soda-lime glass fusion furnace operating under reducing conditions.

Abstract: An alumina-based sintered body for a spark plug having enhanced mechanical strength and a method of manufacturing the same, as well as a spark plug having the alumina-based sintered body for a spark plug and a method of manufacturing the same.