摘要:
Ceramic composite materials, devices and methods are shown. In selected examples, ceramic materials are processed at low temperatures that permit incorporation of low temperature components, such as polymer components. manufacturing methods include, but are not limited to, injection molding, autoclaving and calendaring.
摘要:
Methods for forming ceramic cores are disclosed. A ceramic core formed using the method of the present application includes a silica depletion zone encapsulating an inner zone. The inner zone includes mullite and the silica depletion zone includes alumina. The method includes heat-treating a ceramic body in a non-oxidizing atmospheric condition for an effective temperature and time combination at a pressure less than 10′ atmosphere to form the silica depletion zone at a surface of the ceramic core.
摘要:
The object of the present invention is to provide the dielectric ceramic composition having good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition according to the present invention comprises a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, said “m”, “x”, “y” and “z” all show a mol ratio, and each satisfies 0.94≤m≤1.1, 0≤x≤0.2, 0≤y≤0.2, 0.06≤z
摘要:
The present invention provides a ceramic to ceramic joint and methods for making such a joint. Generally, the joint includes a first ceramic part and a second ceramic part, wherein the first and second ceramic parts each include a ceramic-carbide or a ceramic-nitride material. In some cases, an aluminum-initiated joint region joins the first and second ceramic parts. This joint region typically includes chemical species from the first and second ceramic parts that have diffused into the joint region. Additionally, the first and second ceramic parts each typically include a joint diffusion zone that is disposed adjacent to the joint region and which includes aluminum species from the joint region that have diffused into the joint diffusion zone. Other implementations are also described.
摘要:
A dielectric ceramic composition includes a main component comprising (1-x)BaTiO3-x(Na1-yKy)NbO3, where 0.005≦x≦0.5 and 0.3≦y≦1.0; a first subcomponent comprising an element selected from the group consisting of Mn, V, Cr, Fe, Ni, Co, Cu and Zn; and a second subcomponent comprising SiO2.
摘要:
A method for producing a ceramic scintillator comprising the steps of mixing a rare earth compound with sulfuric acid and/or sulfate to cause their reaction to obtain a product; calcining the product to obtain calcined powder; reducing the calcined powder to obtain rare earth oxysulfide powder; molding the rare earth oxysulfide powder to obtain a green body; and sintering the green body; a pulverization step being conducted to adjust the particle sizes of the product and/or the calcined powder at least before the reduction step.
摘要:
A production method of rare earth oxysulfide comprising a step of mixing a rare earth compound with sulfuric acid and/or sulfate in such a proportion that sulfate ions are 0.75-1.75 mol to 1 mol of a rare earth element, thereby preparing a reaction solution to obtain a product; a step of calcining the product to obtain calcined powder; and a step of reducing the calcined powder to obtain rare earth oxysulfide.
摘要:
A SiC ceramic material includes a bundle of SiC continuous fibers in a porous SiC ceramic matrix, has thermal insulation properties, a high level of strength and a high degree of toughness. A SiC ceramic structure is made of the SiC ceramic material. It is produced by preparing a pressure-sintered compact using a slurry prepared by mixing SiC powder and carbon powder in a liquid and by gasifying and releasing the carbon powder. The SiC ceramic structure can be produced by heating a reaction preparation containing a bundle of SiC continuous fibers and Si powder to a temperature equal to or higher than the melting point of silicon causing a reaction of the carbon component and Si powder and thereby obtaining a reaction-sintered compact, and by gasifying and releasing the carbon component from the reaction-sintered compact. The SiC ceramic can be produced by a chemical vapor deposition method.
摘要:
A composite substrate for a semiconductor includes a handle substrate 11 and a donor substrate bonded to a surface of the handle substrate 11 directly or through a bonding layer. The handle substrate 11 is composed of an insulating polycrystalline material, a surface 15 of the handle substrate 11 has a microscopic central line average surface roughness Ra of 5 nm or smaller, and recesses 6 are formed on the surface of the handle substrate.
摘要:
The present disclosure is directed to a rapid process for the preparation of gadolinium oxysulfide having a general formula of Gd2O2S, referred to as GOS, scintillation ceramics by using the combination of spark plasma primary sintering (SPS) and hot isostatic pressing secondary sintering.
摘要翻译:本公开涉及通过使用火花等离子体一次烧结(SPS)和热等静压二次烧结的组合制备具有通式Gd 2 O 2 S(称为GOS)闪烁陶瓷的通式Gd 2 O 2 S的快速方法。