Abstract: An improvement in a mixture for forming into a body that is to be fired into a “whiteware ceramic product” wherein the mixture is a compound of clay and other minerals with a ferric oxide content of less than about 5.0% by weight of the dry mixture. The improvement includes adding to the mixture a binder in the form of a combination of protein and a vegetable flour with an equivalent gram strength of at least 30 grams and a protein content of 20-50% of the binder, where the binder is in the range of 0.05% to 0.50% by weight of the dry mixture.

Abstract: A composition includes a sintered mass having a plurality of cores and a grain boundary layer disposed between each of the plurality of cores. The core includes a transition metal oxide, and grain boundary layer includes a sintering additive, a grain growth inhibitor additive and a grain boundary additive.

Abstract: A manufacturing method by which alumina-silica based fibers excellent in mechanical strength can be readily and securely obtained. The method obtains precursor fibers as a material by using an alumina-silica based fiber spinning stock solution for use in an inorganic salt method. Next, the precursor fibers are heated under an environment which makes it difficult to carry out an oxidizing reaction on the carbon component contained in the precursor fibers. Thus, the precursor fibers are sintered to obtain alumina-silica based fibers.

Abstract: A composite article includes a substrate and a layer attached to the substrate. The layer includes a metal phase, a first ceramic phase, and a second ceramic phase.

Abstract: The sintered body of gastight translucent polycrystalline alumina contains oxidic magnesium, an oxidic second metal selected from erbium, holmium, thulium and dysprosium, and oxidic zirconium. The body can be used in a lamp vessel of an electric lamp.

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: The invention relates to a light emitting device, especially a LED comprising a ceramic garnet material.

Abstract: A coating composition, a method for producing the coating composition, a coating film and magnetic recording medium are described. The coating composition comprises a binder, a solvent, and an ?-alumina powder, wherein the ?-alumina powder satisfies the following (a) and (b): (a) when the ?-alumina powder is pressed to obtain a green body and the green body is sintered at 1250° C. under the atmospheric pressure, a relative density of the obtained sintered body is about 80% or more, and (b) a BET specific surface area of the ?-alumina powder is about 10 m2/g or more.

Abstract: Amorphous materials, glass-ceramics and methods of making the same. Embodiments of the invention include abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: There is provided a honeycomb structured body having improved durability in a honeycomb structure body obtained by unitarily bonding a plurality of honeycomb segments. There is provided a honeycomb structure body 1 including a plurality of honeycomb segments 12 each having an outer wall 7, partition walls 2 disposed in the outer wall 7, and a plurality of cells 3 separated from each other by the partition walls 2 and extending in an axial direction, a bonding layer 8 interposed between the plurality of honeycomb segments 12 to unitarily bond the honeycomb segments 12, and an intermediate layer 9 interposed between the bonding layer 8 and the honeycomb segments 9. In the honeycomb structure body 1, pores having a diameter of 0.5 ?m or more of the intermediate layer 9 occupies 25% by volume or less of the whole volume of the intermediate layer 9.

Abstract: Al2O3—Y2O3—ZrO2/HfO2 ceramics (including glasses, crystalline ceramics, and glass-ceramics) and methods of making the same. Ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. The particles and fibers are useful, for example, as thermal insulation, filler, or reinforcing material in composites (e.g., ceramic, metal, or polymeric matrix composites). The thin coatings can be useful, for example, as protective coatings in applications involving wear, as well as for thermal management. Certain ceramic particles according to the present invention can be are particularly useful as abrasive particles.

Abstract: 12CaO.7Al2O3 polycrystal having high conductivity is provided. It has become obvious that the conductivity of the 12CaO.7Al2O3 polycrystal becomes 100 [S/cm] or more by controlling a nitrogen content in the 12CaO.7Al2O3 polycrystal within a range of 0.3 to 1.1 [wt %], and that the conductivity becomes 150 [S/cm] or more by controlling the nitrogen content within a range of 0.5 to 0.9 [wt %].

Abstract: A manufacturing method by which alumina-silica based fibers excellent in mechanical strength can be readily and securely obtained. The method obtains precursor fibers as a material by using an alumina-silica based fiber spinning stock solution for use in an inorganic salt method. Next, the precursor fibers are heated under an environment which makes it difficult to carry out an oxidizing reaction on the carbon component contained in the precursor fibers. Thus, the precursor fibers are sintered to obtain alumina-silica based fibers.

Abstract: Abrasive particles comprising alpha alumina particles and methods of making the same. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: Abrasive particles and methods of making the same. Embodiments of the invention can be used to make abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: A glass fiber composition comprises about 52-65 weight % SiO2; less than or equal to 4 weight % Al2O3; about 7-16 weight % Fe2O3; greater than 6 weight % and less than or equal to about 14 weight % R2O; about 6-25 weight % CaO; less than or equal to 10 weight % MgO; and about 10-25 weight % RO; wherein R2O represents alkali metal oxides and RO represents alkaline earth metal oxides. Preferably, the glass fiber composition has a liquidus temperature of less than 2350° F.; and a viscosity at a liquidus temperature of the glass fiber composition of greater than 500 poise; and fire resistant glass fiber formed from the glass fiber composition has a biodissolution rate of greater than 50 ng/cm2/hr.

Abstract: A glass fiber composition comprises about 33-47 weight % SiO2; about 18-28 weight % Al2O3; about 5-15 weight % Fe2O3; greater than or equal to about 2 weight % and less than 10 weight % R2O; about 8-30 weight % CaO; and less than 4 weight % MgO; wherein R2O represents alkali metal oxides. Preferably, the glass fiber composition has a liquidus temperature of less than 2350° F.; and a viscosity at a liquidus temperature of the glass fiber composition of greater than 500 poise; and fire resistant glass fiber formed from the glass fiber composition has a biodissolution rate of greater than 50 ng/cm2/hr.

Abstract: A preform for a composite material which has high strength and excellent air permeability and hence is applicable to a high-speed die casting method and which is capable of forming a metal composite material having excellent mechanical properties by a high-speed die casting method. Also provided is a process for producing such a preform. Ceramic fibers or/and ceramic particles are mixed with a silica sol and calcium carbonate and sintered at a predetermined temperature to form a calcium/silicon sinter obtained from the silica sol and calcium carbonate. The calcium/silicon sinter coats the ceramic fibers or/and ceramic particles so that a preform having the fibers or/and the particles bound to each other by the calcium/silicon sinter is obtained. The preform for a composite material has high strength and excellent air permeability and is applicable to the high-speed die casting method capable of attaining high productivity.

Abstract: Ceramics are made of preceramic paper or board structures in a particular shape previously represented in a paper structure, in which the preceramic papers or boards have a content of ceramic fillers between 30 and 95 wt-%, with the ceramic fillers having a particle size <30 ?m. A method for manufacturing such ceramics and the use thereof are also provided.

Abstract: A method of forming (and an apparatus for forming) a metal-doped aluminum oxide layer on a substrate, particularly a semiconductor substrate or substrate assembly, using a vapor deposition process.

Abstract: There is disclosed a ceramic structure which comprises a material having a controlled pore distribution and including cordierite as the main crystal phase. In the pore distribution, the volume of pores having pore diameters smaller than 20 ?m accounts for 15% or less of the total pore volume, and the volume of pores having pore diameters of 20 to 100 ?m accounts for 70% or more of the total pore volume. This ceramic structure is suitable for realizing a ceramic catalyst body which has excellent purification efficiency, is reduced in pressure loss, and is mountable even in a limited space.

Abstract: The subject matter of the invention is a component which is provided with a ceramic coating forming the surface. Inventively there is provision at least in a cover layer of the coating for nanoparticles made from a colorant (CrCoAl or a spinel-type oxide) and aluminum oxide nanoparticles. This combination of nanoparticles in the coating advantageously results in a resistance to high temperatures of the coloring of the surface of up to 1000° C. not previously known. This allows even components under great stress, such as for example compressor or turbine blades of a gas turbine, to be provided with temperature-resistant coloring. This can then be used for an optical inspection for example.

Abstract: Aqueous dispersion containing: at least one metal oxide selected from the group consisting of alpha-aluminium oxide, cerium oxide, silicon dioxide, titanium dioxide and zirconium dioxide and in addition at least one transition aluminium oxide which is present in the form of aggregates of primary particles, wherein the total content of metal oxide and transition aluminium oxide is from 60 to 75% by weight, based on the total amount of the dispersion, the content of transition aluminium oxide is from 30 to 45% by weight, based on the total amount of the dispersion, the BET surface area of the transition aluminium oxide is from 30 to 90 m2/g, the mean aggregate diameter of the transition aluminium oxide is less than 100 nm, the mean particle diameter of the metal oxide is from 100 to 500 nm, and a dispersant selected from the group consisting of polyaluminium hydroxychloride, polyaluminium hydroxynitrate and/or polyaluminium hydroxysulphate.

Abstract: The present invention provides a message energy memory ceramics. The message information memory ceramics includes: (1) a plurality of message energy memory ceramics grains composed of a silicon oxide, an aluminum oxide, a sodium oxide, a potassium oxide, a magnesium oxide, a calcium oxide, a titanium oxide, an ferric oxide, a manganese oxide, and a zinc oxide; and (2) a powder of message energy memory ceramics grains composed of a silicon oxide, an aluminum oxide, a sodium oxide, a potassium oxide, a magnesium oxide, a calcium oxide, a titanium oxide, an ferric oxide, a manganese oxide, and a zinc oxide. The products of the present invention can be applied to general water supply stations, water towers, and drinking water machines.

Abstract: Aqueous dispersion containing transition aluminium oxide as only solid and a dispersant, in which—the transition aluminium oxide is present in the form of aggregates of primary particles, the content of transition aluminium oxide in the dispersion is from 40 to 65% by weight, the aggregates in the dispersion have a mean aggregate diameter of less than 100 nm,—the dispersant contains polyaluminium hydroxychloride, polyaluminium hydroxynitrate and/or polyaluminium hydroxysulphate, the dispersion has a pH of from 3 to 5.

Abstract: Polycrystalline alumina and methods for manufacturing polycrystalline alumina exhibiting improved transmission in the infrared region. In one embodiment, the percent real in-line transmittance is within about 2% of sapphire at selected wavelengths. In one or more embodiments, polycrystalline articles exhibit improved mechanical properties such as thermal shock resistance and hardness, which may find use in armor applications.

Abstract: An insulating material high both in thermal conductivity and light reflectance, and a submount high in heat radiatability for mounting an LED element thereon, capable of raising a light utilization factor and quickly radiating heat generated from the element. For example, used as a substrate material of a submount is a nitride sintered body having a reflectance of light in the wavelength region of from 350 nm to 800 nm of 50% or more and a reflectance of light with a wavelength of 700 nm of 60% or more, obtained by sintering a preform consisting of a composition containing 100 parts by mass of aluminum nitride powder and 0.5 to 10 parts by mass of a compound containing an alkaline earth metal such as 3CaO×Al2O3 in an inert atmosphere containing a specific quantity of carbon vapor, or by burning a coat of a nitride paste applied on a base substrate having a heat resistance at a predetermined temperature.

Abstract: The object of the present invention is to provide an electrostatic chuck in which the surface can be kept smooth after being exposed to plasma, so as to protect a material to be clamped such as a silicon wafer from being contaminated with particles, and which is excellent in clamping and releasing a material to be clamped. According to the present invention, there is provided an electrostatic chuck comprising a dielectric material in which alumina is 99.4 wt % or more, titanium oxide is more than 0.2 wt % and equal to or less than 0.6 wt %, whose average particle diameter is 2 ?m or less, and whose volume resistivity is 108-1011 ?cm in room temperature, wherein the electrostatic chuck is used in a low temperature of 100° C or less.

Abstract: A ceramic insulating material, in particular for sensor elements for determining the concentration of gas components in gas mixtures, is based on an alkaline earth-containing ceramic. The insulating material contains a hexaaluminate of the alkaline earth metal and at least one mixed compound of the alkaline earth metal with an acid oxide, the molar ratio of hexaaluminate to the sum of mixed compounds in the insulating material being 1.3 to 4.0.

Abstract: A sintered ceramics for mounting a light-emitting element, which is capable of realizing high optical reflectance over the entire region from ultraviolet radiation to visible light. The sintered ceramics has a light-reflective face of which reflectance to light in each wavelength in the range of 250 nm˜750 nm is 70% or more. The light-reflective face satisfies following reaction: |RA?RB|?20 when reflectance to light of 750 nm is defined as RA%, and reflectance to light of 300 nm is defined as RB. The sintered ceramics has not layer to be peeled from the light-reflective face when a Tape Peeling Test is carried out to the light-reflective face in accordance with the method described in JIS H8504 (1990).

Abstract: To provide an electron emitter, a field emission display unit, a cold cathode fluorescent tube and a flat type lighting device, which employ an electron emitting material producible at a low cost and in a large amount. A conductive mayenite type compound powder containing at least 50 mol % of a mayenite type compound represented by a chemical formula of either 12CaO.7Al2O3 or 12SrO.7Al2O3 and having a maximum particle size of at most 100 ?m, is used as an electron emitter, whereby an electron emitter, a field emission display unit, a cold cathode fluorescent tube and a flat type lighting device, are realized that are easy to produce and capable of emitting electrons even at a low applied voltage and whereby a large current can be obtained per the same applied voltage surface.

Abstract: There is provided bonding material having a Young's Modulus after hardening of not less than 20% of articles to be bonded, and an average linear coefficient of thermal expansion after hardening of not more than 70% of the articles to be bonded. This bonding material can suppress deformation of a honeycomb segment due to thermal stress to be generated by a bonding material layer and can suitably be used at the time of manufacturing exhaust gas trapping filters capable of reducing the generation of defects such as a crack, and above all, a diesel particulate filter (DPF) for trapping particulate matter (particulates) in exhaust gas from the diesel engine.

Abstract: A composition is provided that includes a plurality of calcined particles of terbium aluminum oxide having a mean particle domain size of between 30 and 600 nanometers. A translucent article having a surface includes polycrystalline terbium aluminum garnet having a mean grain size from 1 to 10 microns and light scattering inclusions of aluminum-rich oxide and/or terbium-rich oxide that are present at less than 2 surface area percent of the surface. A process for forming such an article involves sintering the above provided composition at a temperature between 1500° C. and 1700° C. to yield a sintered article. The article has improved translucency and even transparency as sintering is performed under vacuum at a temperature between 1610° C. and 1680° C. Hot isostatic pressing alone or in combination with article polishing also improves article translucency.

Abstract: The present invention relates to ceramic precursor powder compositions and chemically bonded ceramic (CBC) materials, Ca-aluminate and/or calcium silicate, and a composite biomaterial with prolonged shelf time of the precursor, suitable for orthopaedic applications with improved injectability. The present invention also relates to a method of manufacturing said cured material, bioelements, implants, or drug delivery carrier materials made by said cured material, a kit comprising the ceramic precursor powder and hydration liquid, as well as the use of said ceramic precursor powder and hydration liquid, or said cured material, for orthopaedic and dental applications.

Abstract: The present invention provides a cubic boron nitride sintered body, which achieves both of superior chipping resistance and wear resistance. In accordance with a first aspect of the present invention, a cubic boron nitride (cBN) sintered body contains cubic boron nitride particles and a bonding material used for bonding the cBN particles to one another. This sintered body is constituted by cBN particles in a range from 70 vol % to 98 vol % and a residual bonding material made from a Co compound, an Al compound and WC and a solid solution of these. Moreover, the cBN particles in the sintered body contain 0.03 wt % or less of Mg and 0.001 wt % or more to 0.05 wt % or less of Li. In accordance with a second aspect of the present invention, the cubic boron nitride sintered body has a composition in which the bonding material of the first aspect is changed to an Al compound.

Abstract: The present invention relates to ceramic precursor compositions and chemically bonded ceramic (CBC) materials, especially Ca-based, and composite biomaterials suitable for orthopaedic and dental applications with improved setting and curing properties resulting in stable close contact between biomaterial and bone tissue. The present invention also relates to a method of manufacturing said cured material, a bioelement and carrier material for drug delivery made by said cured material, a kit comprising the ceramic precursor powder and hydration liquid, as well as the use of said ceramic precursor powder and hydration liquid, or said cured material, for orthopaedic and dental applications.

Abstract: An electrostatic chuck comprises a dielectric ceramic layer made of an alumina sintered body having a volume resistivity equal to or greater than about 1×1017?·cm at room temperature and a volume resistivity equal to or greater than about 1×1014?·cm at 300° C., and an electrode formed on one surface of the dielectric ceramic layer.

Abstract: An alumina-titanium oxide-zirconia fused grain presenting, for a total of 100%, the following chemical composition: Al2O3: more than 10% and less than 50%; TiO2: more than 10% and less than 40%; ZrO2: more than 50%; and impurities: less than 2%; the percentages being percentages by weight on the basis of the oxides. The invention is applicable to slide gates for continuous casting of steel.

Abstract: A ceramic composition including a first ceramic material and a second ceramic material that is in the form of nano-, submicron-, or micron-sized particles, in which the first ceramic material has a lower melting point than the second ceramic material, and, when the first ceramic material melts into a liquid and the second ceramic material remains particulate, the second ceramic material floats at the top of the liquid. Also disclosed is a variant of this composition including a first ceramic material and a second ceramic material, in which the second ceramic material has a melting point higher than the first ceramic material, and, when the first ceramic material melts into a liquid, the second ceramic material partially or completely dissolves in the liquid.

Abstract: The present invention relates to highly dense translucent and transparent aluminium oxide components for applications, e.g. in the lighting industry, where a fine crystal size has to be obtained and stabilized for use at temperatures of 800° C. or more. Disclosed are high-strength polycrystalline alumina products which include 0.001-0.5 weight-% ZrO2 stabilizing a fine crystal size <2 ?m or, preferably, <1 ?m if used at temperatures of 800° C. or more. The microstructure exhibits an extremely high relative density enabling a high real in-line transmission >30% measured over an angular aperture of at most 0.5° at a sample thickness of 0.8 mm and with a monochromatic wavelength of light ?, preferably, of 645 nm.

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

Abstract: A binder is mixed to alumina powder with a purity of 99.5% or more (step S11), the mixture is granulated (step S12), resultant granule powder is formed with a die (step S13), and a formed compact is sintered in a hot-pressing manner (step S14).

Abstract: An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water.

Abstract: Aluminum titanate precursor batch compositions comprising a recycled aluminum titanate component, at least a portion of the recycled aluminum titanate component being comprised of a recycled pre-reacted aluminum titanate composition or alternatively of an un-reacted green aluminum titanate precursor composition, and methods for producing aluminum titanate ceramic articles utilizing the inventive batch compositions.

Abstract: A composite ceramic of the present invention includes granular alumina particles (A) having an aspect ratio of 3 or less, granular zirconia particles (B) having an aspect ratio of 3 or less, and a columnar crystal (C) having an aspect ratio of 3 or more, the columnar crystal including a complex metal oxide containing an alkaline-earth metal element and aluminum element. The composite ceramic has high flexural strength, toughness, and hardness, and achieves excellent hot-water resistance and high flexural strength after hydrothermal degradation resistance test.

Abstract: An object of the present invention is to lower the sintering temperature required for a sintered body of yttrium-aluminum garnet, to improve the corrosion resistance of the sintered body and to prevent the reduction of the transmittance thereof. A sintered body of yttrium-aluminum garnet is produced from a source compound for yttrium and a source compound for aluminum using aluminum nitride as a sintering aid. It maybe considered that aluminum nitride reacts with alumina and yttria to generate liquid phase and to reduce the sintering temperature during the sintering process.

Abstract: An electrode-forming composition and a plasma display panel manufactured using the electrode-forming composition are provided.

Abstract: An aluminum oxide sintered body contains aluminum oxide in an amount of not less than 99% by weight and at least one selected from magnesium oxide, calcium oxide and silicon oxide, and contains phosphorus of not more than 0.0025 parts by weight to 100 parts by weight of the aluminum oxide sintered body. This avoids that phosphorous exerts adverse effect on the sintering properties of an aluminum oxide sintered body, especially the sintering properties of a large aluminum oxide sintered body, causing the sintered body to lack uniformity between the sintered body inner portions and outer portions. Therefore, this aluminum oxide sintered body is suitably used in semiconductor manufacturing apparatus members or liquid crystal manufacturing apparatus members.

Abstract: The production of low-loss, tunable composite ceramic materials with improved breakdown strengths is disclosed. The composite materials comprise ferroelectric perovskites such as barium strontium titanate or other ferroelectric perovskites combined with other phases such as low-loss silicate materials and/or other low-loss oxides. The composite materials are produced in sheet or tape form by methods such as tape casting. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices.

Abstract: A nanocomposite ceramic includes a uniform combination of a ceramic spinel phase and an alumina phase, wherein each phase exhibits a grain size in the range of from about 0.1 nm to 10,000 nm.