Abstract:
PROBLEM TO BE SOLVED: To provide a particulate material having dispersilibity.SOLUTION: The particulate material is made by: adding an inorganic salt comprising an oxidized metal anion to an alumina hydrate suspension; and further adding an acidifying agent to the alumina hydrate suspension; whereby a layer of metal oxide is precipitated onto alumina hydrate particles to form the particulate material comprising metal oxide-coated alumina hydrate. The particulate material has a 500 psi compaction volume ratio of at least about 4.0 cc/cc.
Abstract:
PROBLEM TO BE SOLVED: To provide a process for preparing a catalyst carrier, which can keep the high level of selectivity when olefin oxide is produced by reacting olefin with oxygen.SOLUTION: The process for the preparation of a carrier comprises: a step of forming a mixture comprising (a) from 50 to 95 weight percent of a first particulate α-alumina having a median particle size (d) of from 5 to 100 mum, (b) from 5 to 50 weight percent of a second particulate α-alumina having a dwhich is less than the dof the first particulate α-alumina and which is in the range of from 1 to 10 μm, and (c) an alkaline earth metal silicate bond material, weight percent being based on the total weight of α-alumina in the mixture; and a step of firing the mixture to form the carrier.
Abstract:
PROBLEM TO BE SOLVED: To provide a coating composition for a high temperature refractory ceramic substrate. SOLUTION: Refractory coatings comprising unstabilized zirconia, silica and, optionally, zircon and/or mullite are disclosed in the specification. The unstabilized zirconia, silica and optional zircon and/or mullite are applied as a slurry onto ceramic substrates such as silicon carbide and are fired. The refractory coatings maintain good edge-clarity and color when applied onto the ceramic substrates and exposed to a temperature over 1,100°C. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an ESD (electrostatic discharge) dissipative ceramic used for prevention of an ESD phenomenon and protection of a microelectronic device. SOLUTION: The ESD dissipative ceramic is a dense ceramic having ESD dissipative characteristics, tunable volume and surface resistivity in a semi-insulative range (10 3 to 10 11 Ωcm), substantially pore free, high flexible strength, and light colors. Because of desired ESD dissipation characteristics, structural reliability, high visual recognition, and low wear and particulate contamination, the ceramic is suitably used as ESD dissipating tools, fixtures, load bearing elements, work surfaces, and containers in manufacturing and assembling electrostatically sensitive microelectronic, electromagnetic, electro-optic components, devices and systems. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an electrostatic discharge (ESD) dissipative ceramic. SOLUTION: The invention relates to a dense ceramic having ESD dissipative characteristics, tunable volume and surface resistivity in a semi-insulative range (10 3 to 10 11 Ωcm), substantially pore free, high flexible strength, light colors, for desired ESD dissipation characteristics, structural reliability, high visual recognition, low wear and particulate contamination to be used as ESD dissipating tools, fixtures, load bearing elements, work surfaces, containers in manufacturing and assembling electrostatically sensitive microelectronic, electromagnetic, electro-optic components, devices and systems. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a processing fluid which reduces electrostatic charge build-up in a hydrocarbon-based fluid used to prevent corrosion and oxidation in processes such as lapping, grinding, polishing and cleaning in manufacturing electronic components.SOLUTION: A processing fluid comprises 50-95 wt.% of an aliphatic hydrocarbon component having an average chain length of 8 to 16 carbon atoms, 1.0-25.0 wt.% of a glycol ether component, 0.005-5.0 wt.% of an ionic polymer component, and 0.1-5.0 wt.% of a carboxylic acid functional component.
Abstract:
PROBLEM TO BE SOLVED: To provide a coating composition for a high temperature refractory ceramic substrate.SOLUTION: There is disclosed a refractory coating consisting of nonstabilized zirconia, silica, and zircon and/or mullite as an option. The nonstabilized zirconia, silica, and optional zircon and/or mullite is applied to be calcined as a slurry to a ceramic substrate such as a silicon carbide. When applied to the ceramic substrate, the refractory coating maintains good edge definition and good color in case of being exposed to a temperature higher than 1,100°C.
Abstract:
PROBLEM TO BE SOLVED: To provide a catalyst carrier which can keep the high level of selectivity during the production of olefin oxide by oxidization of olefin.SOLUTION: The carrier, which comprises non-platelet alumina and/or a bond material, has a surface area of at least 1 m/g, a total pore volume and a pore size distribution such that at least 80% of the total pore volume is contained in pores with diameters in the range of from 0.4 to 10 μm, and at least 80% of the pore volume contained in the pores with diameters in the range of from 0.1 to 10 μm is contained in pores with diameters in the range of from 0.3 to 10 μm.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of grinding a sapphire substrate suitable to manufacture a large high-quality substrate.SOLUTION: A method of machining a sapphire substrate comprises grinding a first surface of a sapphire substrate using a first fixed abrasive and grinding the first surface of the sapphire substrate using a second fixed abrasive. The second fixed abrasive has a smaller average grain size than the first fixed abrasive. The second fixed abrasive is self-dressing.