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| Number | Title | Issue Date |
| 7327415 | Microvoided light diffuser The invention relates to a light diffuser comprising a thermoplastic layer containing thermoplastic polymeric material and microvoids having a substantially circular cross-section in a plane perpendicular to the direction of light travel and having a diffuse light t... | 02/05/2008 |
| 7294596 | Sintered ceramic material with improved properties and method for its manufacturing A sintered ceramic material comprises a crystalline phase and an intergranular phase comprising a glass phase. The material is manufactured from a starting powder being mixed with an additive comprising one or more metal from a group of Li, Na, Mg, Ca, Sr, Ba, Sc, Y... | 11/13/2007 |
| 7244686 | Bearings produced from silicon nitride substances containing sintering additives and SiO The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and op... | 07/17/2007 |
| 7244376 | Hexaboride particles, hexaboride particle dispersion, and article making use of hexaboride particles or hexaboride particle dispersion In hexaboride particles having particles of a hexaboride of at least one element (X) selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sr and Ca, or a dispersion of such particles, the surfaces of the hexaboride particles have physically been ... | 07/17/2007 |
| 7223709 | Method of making a SiAION ceramic A method of making a SiAlON ceramic body that includes a two phase composite comprising an alpha prime SiAlON phase and a beta prime SiAlON phase, the method includes the steps of: providing a starting powder that comprises at least about 70 weight percent silicon n... | 05/29/2007 |
| 7192899 | Silicon nitride sintered body having high heat conductivity and silicon nitride structural element A silicon nitride sintered body exhibiting a high heat conductivity, the silicon nitride sintered body includes a rare earth element in an amount of 2 to 17.5 mass % in terms of the oxide thereof, Fe in an amount of 0.07 to 0.5 mass % in terms of the oxide thereof, ... | 03/20/2007 |
| 7157394 | Stoichiometrically balanced silicon nitride ceramic for high performance cutting tools A silicon nitride based ceramic, that is highly effective for use as a cutting tool for the high speed machining of cast irons, that is essentially a homogeneous mixture consisting of both crystalline and whisker forms of beta silicon nitride that are interstitially... | 01/02/2007 |
| 7138328 | Packaged IC using insulated wire A packaged IC including insulated wire for electrically connecting conductive structures of the packaged IC. In some embodiments, the packaged IC includes an IC die attached to a package substrate, where bond pads of the IC die are electrically connected to bond fin... | 11/21/2006 |
| 7064095 | Doped alpha-beta sialon ceramics This invention is about SiALON ceramics comprising an alpha SiAlON, a beta SiAlON and an intergranular amorphous and/or crystalline phase. Said alpha SiALON phase was prepared from a multi-cationic mixture including the element of calcium, at least one of yttrium an... | 06/20/2006 |
| 7056850 | Wear-resistant silicon nitride member and method of manufacture thereof The present invention provides a wear resistant member composed of silicon nitride sintered body containing 2–10 mass % of rare earth element in terms of oxide thereof as sintering agent, 2–7 mass % of MgAl2O4 spinel, 1–10 mass % of silic... | 06/06/2006 |
| 6911162 | Conductive silicon nitride composite sintered body and a process for the production thereof A conductive silicon nitride composite sintered body having an average grain size of 200 nm or less and whose relative roughness (Ra) after electric discharge machining is 0.6 μm or less can be obtained by grinding/mixing a silicon nitride powder and a metal powder... | 06/28/2005 |
| 6869902 | Silicon nitride porous body and method of manufacturing the same A silicon nitride porous body (5) obtained by nitriding a molded body having metallic silicon (3) as a main component, the porous body having a porous structure with an average pore diameter of 3 μm or above, and wherein the total content of silicon a... | 03/22/2005 |
| 6861382 | Sintered silicon nitride and silicon nitride tool Sintered silicon nitride and a silicon nitride tool. The mean major axis length, the mean minor axis length, and the aspect ratio, represented by (mean major axis length/mean minor axis length) of constituent sintered silicon nitride grains in a silicon nitride tool... | 03/01/2005 |
| 6846764 | Silicon nitride porous body and method of manufacturing the same A silicon nitride porous body which is obtained by nitriding a molded body having metallic silicon as a main component and by performing a high temperature heating treatment at a temperature higher than the nitriding temperature, and which has a porous structure wit... | 01/25/2005 |
| 6811868 | Ceramic body and ceramic catalyst body The object of the present invention is to provide a ceramic body that can support a required amount of a catalyst component, without lowering the characteristics such as strength, being manufactured without forming a coating layer and providing a high performance ce... | 11/02/2004 |
| 6784131 | Silicon nitride wear resistant member and method of manufacturing the member The present invention provides a silicon nitride wear resistant member composed of silicon nitride sintered body containing 1-10 mass % of rare earth element in terms of oxide thereof as sintering agent, wherein a total oxygen content of the silicon nitride sintered... | 08/31/2004 |
| 6749930 | Corrosion-resistive members A corrosion-resistive member is provided, including a corrosion-resistive face that is exposed to a corrosive gas causing ion bombardmemt. At least a part of the corrosion-resistive member is composed of a sintered silicon nitride body having an open porosity of not... | 06/15/2004 |
| 6670294 | Corrosion-resistive ceramic materials and members for semiconductor manufacturing Corrosion-resistive ceramic materials include a silicon based ceramic, wherein a percentage of respective metal elements other than metal elements constituting sintering agents and silicon is not more than 10 weight ppm. The corrosion-resistive ceramic ma... | 12/30/2003 |
| 6599637 | Silicon nitride composite substrate A Si3 N4 composite substrate which manifests no generation of cracking on the substrate even by mechanical shock or thermal shock, and is excellent in heat radiation property and heat-cycle-resistance property is obtained by using a ... | 07/29/2003 |
| 6592782 | Materials and methods for the separation of oxygen from air Metal oxides particularly useful for the manufacture of catalytic membranes for gas-phase oxygen separation processes having the formula: Ax A'x' A"2-(x+x') By Fey' B"2-(y+y') O5+z wh... | 07/15/2003 |
| 6534430 | Material for measuring static and dynamic physical parameters A sensor material for measuring physical parameters capable of configuring a sensor capable of directly measuring a high value of physical parameters such as high stress or high pressure without employing a pressure resistance container. The sensor materi... | 03/18/2003 |
| 6458732 | Lightweight dry refractory A dry refractory composition having superior insulating value. The dry refractory composition also may have excellent resistance to molten metals and slags. The composition includes filler lightweight material, which may be selected from perlite, vermicul... | 10/01/2002 |
| 6432855 | Superabrasive boride and a method of preparing the same by mechanical alloying and hot pressing A ceramic material which is an orthorhombic boride of the general formula: AlMgB14 :X, with X being a doping agent. The ceramic is a superabrasive, and in most instances provides a hardness of 40 GPa or greater.... | 08/13/2002 |
| 6410468 | Si3N4 ceramic, Si-base composition for production thereof and processes for producing these A slurry Si-base composition comprising an Si powder having a thickness of a surface oxide film ranging from 1.5 to 15 nm, 50 to 90% by weight of water, 0.2 to 7.5% by weight, in terms of oxide, of a sintering aid and 0.05 to 3% by weight of a dispersant,... | 06/25/2002 |
| 6395661 | Sintered silicon nitride, components made therewith, specially valves, methods for the production and use thereof A sintered Si3 N4 material, valves and components made with the material, and methods for making same.... | 05/28/2002 |
| 6391812 | Silicon nitride sintered body and method of producing the same A method of producing the silicon nitride sintered body includes the steps of forming a compact of molding materials including silicon nitride powder, a Mg component and a sintering aid, and sintering the molding materials at 1,800 to 2,000° C. under a n... | 05/21/2002 |
| 6313054 | Silicon nitride sintered body, method for manufacturing the same, and cutting insert formed of the sintered body The present invention provides a silicon nitride sintered body having characteristics such as excellent wear resistance, a method for manufacturing the sintered body, and a cutting insert formed thereof. The silicon nitride sintered body is formed of a po... | 11/06/2001 |
| 6294244 | Wiring board having excellent heat-radiating property A wiring board of the present invention is equipped with an insulating board formed of a sintered product of silicon nitride containing a silicon nitride crystal phase, and a metal circuit formed on said insulating board, wherein said sintered product of ... | 09/25/2001 |
| 6291376 | Bimodal silicon nitride BAS ceramic composites A composition and method of fabricating pressureless sintered 70 volume % silicon nitride--30 volume % barium aluminum silicate ceramic composites. The composites are made from 70 volume % silicon nitride, containing varying amounts and size distributions... | 09/18/2001 |
| 6284690 | Si3N4 ceramic, Si-base composition for production thereof and processes for producing these A slurry Si-base composition comprising an Si powder having a thickness of a surface oxide film ranging from 1.5 to 15 nm, 50 to 90% by weight of water, 0.2 to 7.5% by weight, in terms of oxide, of a sintering aid and 0.05 to 3% by weight of a dispersant,... | 09/04/2001 |
| 6242374 | High thermal conductive silicon nitride sintered body and method of producing the same A high thermal conductive silicon nitride sintered body of this invention is characterized by containing: 2.0 to 17.5% by weight of a rare earth element in terms of the amount of an oxide thereof; 0.3 to 3.0% by weight of Mg in terms of the amount of an o... | 06/05/2001 |
| 6218325 | Fiber-reinforced ceramic green body and sindered ceramic article obtained therefrom A fiber-reinforced ceramic green body having enough green strength and handling strength. The fiber-reinforced ceramic green body is obtained by molding a ceramic composition comprising a ceramic powder, a sintering aid powder, an organic fiber, an aqueou... | 04/17/2001 |
| 6025290 | Ceramics having a low heat conductivity In the ceramics having a low heat conductivity, silicon nitride is contained as a main component, a composite oxide or a separate phase thereof and transition metal elements having 66 to 75 of atomic number are dispersed into a substrate, and a minute lay... | 02/15/2000 |
| 6004895 | Pigmented silicon nitride A pigmented silicon nitride composition suitable for hot pressing into near shape articles of manufacture having a cosmetically uniform color. The composition comprises high purity, sub-micrometer, alpha silicon nitride powder mixed with a sintering aid a... | 12/21/1999 |
| 6001759 | Silicon nitride sintered body, method of preparing the same and nitrided compact A silicon nitride sintered body prepared through a nitriding reaction of Si, consists of crystal grains mainly composed of silicon nitride and/or SIALON and a grain boundary phase. The grain boundary phase includes a first component including at least one... | 12/14/1999 |
| 5922629 | Silicon nitride ceramic sliding material and process for producing the same A silicon nitride ceramic sliding material comprising silicon nitride crystal grains and a grain boundary phase and having a porosity of 2 to 10% and a maximum pore size of 20 to 100 μm. The silicon nitride ceramic sliding material preferably has a textu... | 07/13/1999 |
| 5908797 | Silicon nitride based sintered material and method for producing same To provide a silicon nitride based sintered material having high strength and high hardness and superior in reliability, silicon nitride sintered material has a composition mainly composed of silicon nitride or Si--Al--O--N, and further comprises 0.5 to 3... | 06/01/1999 |
| 5854156 | Granulated powder for producing silicon nitride sintered body Granulated powder for molding produced by granulating material powder, whose variation factor (the standard deviation of strength/average strength) of the compressive strength of each granular particles composing granulated powder is 0.3 or less. By using... | 12/29/1998 |
| 5833917 | Process for production of silicon nitride sintered material In a process for producing a silicon nitride sintered material, a silicon nitride raw material powder selected from raw material powder lots such that the silicon nitride raw material powder has a dispersion δN댡 of weight fraction of &#... | 11/10/1998 |
| 5767026 | Silicon nitride ceramic and process for forming the same There are provided a process for forming a silicon nitride sintered body, encompassing a sialon sintered body, by making much of the superplasticity of the sintered body intact as a simple material without formation thereof into a composite material, and ... | 06/16/1998 |
