Abstract:
PROBLEM TO BE SOLVED: To provide improved spinel materials suited for optical applications, and to provide improved methods for forming the same.SOLUTION: A single crystal spinel boule is formed by melt processing. The boule has a non-stoichiometric composition and has a reduced mechanical stress or strain. The reduced mechanical stress is represented by a yield rate, not less than about 20%. Yield rate is defined by W/(W+W)×100%, where Wis equal to the number of intact wafers processed from the boule, and Wis equal to the number of fractured wafers from the boule due to internal mechanical stress or strain in the boule. A single crystal spinel material has a non-stoichiometric composition and has a transparency window represented by absorptivity over a wavelength range. The wavelength range normally extends from about 400 nm to about 800 nm. The transparency window is defined as the largest single absorptivity peak height along the wavelength range, the largest single peak height being not greater than 0.35 cm.
Abstract translation:要解决的问题:提供适用于光学应用的改进的尖晶石材料,并提供改进的形成它们的方法。 解决方案:通过熔融加工形成单晶尖晶石棒。 该毛坯具有非化学计量的组成并具有降低的机械应力或应变。 降低的机械应力由屈服率表示,不小于约20%。 收益率由W i SB> /(W i SB> + W f SB> )×100%,其中W i SB>等于从该坯料处理的完整晶片的数量,并且W f SB>等于 到由于内部机械应力或应力在轴上的来自轴的裂纹晶片的数量。 单晶尖晶石材料具有非化学计量组成,并且具有由波长范围内的吸收率表示的透明度窗口。 波长范围通常从约400nm延伸至约800nm。 透明度窗口被定义为沿着波长范围的最大单个吸收峰峰值,最大单峰高度不大于0.35cm -1 SP>。 版权所有(C)2012,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide novel boron nitride agglomerated powders having controlled density and fracture strength features, and a method for producing the novel boron nitride agglomerated powders. SOLUTION: The method needs preparing a feedstock powder including boron nitride agglomerates, and heat treating the feedstock powder to form a heat treated boron nitride agglomerated powder. In one embodiment, the feedstock powder has a controlled crystal size. In another, the feedstock powder is derived from a bulk source. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thermally conductive filler material which can be used at high fill levels to achieve sufficient thermal conductivity without increasing viscosity. SOLUTION: There is provided a spherical boron nitride powder including the spherical agglomerates of boron nitride platelets preferably having an average agglomerate size of from 10 to 500 microns. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an igniter usable in a comparatively short hot zone length even in high voltage such as about 187-264 V, and useful for comparatively low voltage such as 120 V or 102 V and sub-100 V such as 6, 8, 12 or 24 V. SOLUTION: Ceramic igniter compositions are provided that contain components of conductive material and insulating material, where the insulating material component includes a relatively high concentration of metal oxide. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide sol-gel alumina abrasive grains which reduce the surface areas of the grains and allow the production of vitreous bonded products using low temperature vitreous bond materials without the production of black points, spots as a result of the incomplete combustion of organic components used in the production process. SOLUTION: The sol-gel alumina abrasive grains are characterized by coating the alumina abrasive grains with a ceramic oxide and containing alpha alumina crystals having particle diameters of ≤2 μm. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming a carrier material composed of alumina hydrate as a base material. SOLUTION: A method of forming the carrier material suited to use in Fischer-Tropsch reactions includes forming a dispersion of first and second hydrated alumina materials in a liquid dispersant, such as an acid solution. The first alumina can be derived from an alkali aluminate, such as is formed in the Bayer reaction. The second hydrated alumina can be derived from high purity aluminum, such as via conversion to an alkoxide. The dispersion is spray dried to form particles which are heat treated to form a carrier material having low levels of impurities. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for realigning a crystal orientation of a single crystal body such as a sapphire in the production of a single crystal for a semiconductor of a nitride material of group III and V elements, especially GaN.SOLUTION: A method for altering a crystal orientation of a single crystal body includes a step of analyzing the crystal orientation of a single crystal body and a step of calculating an angle of orientation difference between a selected crystal orientation of the single crystal body and a projection of crystal orientation along a first main outer surface of the single crystal body. The method further includes a step of removing a material from at least a part of the first main outer surface to alter the angle of orientation difference.
Abstract:
PROBLEM TO BE SOLVED: To provide densified silicon nitride.SOLUTION: The densified silicon nitride body can be formed using a lanthana-based sintering aid (lanthanum, neodymium) and an aluminum compound-based sintering aid. A composition by mixing the silicon nitride with the sintering aid can be densified by sintering and hot isostatic pressing at the sintering temperature of 1,750°C.
Abstract:
PROBLEM TO BE SOLVED: To provide a CMP process that removes metal selectively and relatively slowly such that dishing can be minimized, and products therefrom.SOLUTION: A substrate is polished by a CMP product using alumina particles each having a silica coated particle surface in which at least 90% of the alumina particles have primary particle widths of not more than 50 nanometers, less than 10% thereof having primary particle sizes greater than 100 nm, a BET surface area thereof is at least 50 m/g, and the alumina particles have an α-alumina content of at least 90% by weight.