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| Number | Title | Issue Date |
| 7371704 | Sintered bodies of yttrium-aluminum garnet, a method of producing the same and sintering aid therefor 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 y... | 05/13/2008 |
| 7198747 | Fabrication of ceramic microstructures The invention provides ceramic molded solid articles and methods for making these articles on the micron scale. Articles are molded from ceramic precursors, optionally using molds including at least one portion that is elastomeric. ... | 04/03/2007 |
| 7094717 | SiAlON containing ytterbium and method of making A method for making a crystallized ceramic body containing a two phase composite comprising an alpha prime SiAlON phase that contains ytterbium and a beta prime SiAlON phase, the process includes the steps of: blending together a starting powder mixture that upon de... | 08/22/2006 |
| 7049256 | SiAlON containing ytterbium and method of making A SiAlON ceramic body made from a starting powder mixture that includes silicon nitride powder, and one or more powders that provide aluminum, oxygen, nitrogen and ytterbium to the SiAlON ceramic. The SiAlON ceramic body includes a two phase composite comprising alp... | 05/23/2006 |
| 7022753 | Composition for equalizing radial and lateral force variations at the tire/road footprint of a pneumatic tire A composition or particle mixture (20) for equalizing radial and lateral forces at the tire/road footprint of a pneumatic tire (11) due to tire/wheel assembly imbalance, non-uniformity of the tire, temporary disturbances in the road surface, or other v... | 04/04/2006 |
| 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 |
| 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 |
| 6764974 | Reaction synthesis of silicon carbide-boron nitride composites The present invention relates to a silicon carbide-boron nitride composite material, which synthesised according to an in-situ chemical reaction between silicon nitride, boron carbide and carbon, and which contains fine boron nitride particles dispersed in a silicon... | 07/20/2004 |
| 6261981 | Fibre-reinforced composite ceramics and method of producing the same The invention provides a fiber-reinforced composite ceramic containing high-temperature-resistant fibers, in particular fibres based on Si/C/B/N, which are reaction-bonded to a matrix based on Si, which is produced by impregnating fiber bundles of Si/C/B/... | 07/17/2001 |
| 6143677 | Silicon nitride sinter having high thermal conductivity and process for preparing the same A high thermal conductive silicon nitride base sintered body which comprises a phase comprising crystal grains of silicon nitride and a grain boundary phase containing a compound of at least one element selected from the group consisting of yttrium and th... | 11/07/2000 |
| 6007789 | Method of nitriding silicon A process for nitriding materials containing silicon to form a silicon nitride material predominantly in the alpha phase is disclosed which includes nitriding the silicon-containing material by (a) heating the silicon-containing material in an atmosphere ... | 12/28/1999 |
| 5928601 | Method for producing silicon nitride reaction sintered body A silicon nitride reaction-sintered body having a high mechanical strength without surface working can be produced by (1) forming a silicon powder mixture of at least two types of silicon powders having substantially independent particle size distribution... | 07/27/1999 |
| 5876660 | Sintered reaction-bonded silicon nitride components Sintered reaction-bonded silicon nitride components, e.g., automotive components, are made by forming a powder mixture comprising silicon and oxide or oxide precursor additives. These additives comprise alumina and a calcium compound. The powder is formed... | 03/02/1999 |
| 5736118 | Method of producing spherical particles A method of producing spherical particles made from inorganic oxides by sol/gel conversion in which a sol is sprayed upwards from below into a reaction zone containing a reactant gas in such a way that the sol does not split up into individual droplets un... | 04/07/1998 |
| 5352641 | Silicon nitride composite sintered body and process for producing same A composite silicon nitride sintered body formed of silicon nitride as a matrix and silicon carbide having particle sizes of 5 to 500 nm as a phase dispersed in the sintered body, wherein the total amount of dispersed silicon carbide is 1 to 40% by volume... | 10/04/1994 |
| 5308561 | Process for production of a Si3 N4, based material High-strength Si3 N4 -based material with a narrow range spread of values for mechanical properties useful for producing thick-walled ceramic parts for internal combustion engines, thick-walled ceramic fittings or cutting tools is pr... | 05/03/1994 |
| 5273700 | Aluminum nitride sintered body and process for producing the same An aluminum nitride sintered body characterized by comprising aluminum nitride as the main component, containing a titanium compound, and having a black color, a transmittance of 10% or less with the light having a wavelength in the range of from 500 to 6... | 12/28/1993 |
| 5225127 | Process for production of sintered silicon nitride made article There is provided a process for the production of a sintered article which comprises steps of shaping a raw material powder comprising silicon nitride, thermally treating a shaped article in a non-oxidizing atmosphere at a temperature of 1300° to 1650° C. fo... | 07/06/1993 |
| 5154863 | Aluminum nitride-based sintered body and process for the production thereof An aluminum nitride-based sintered body having a thermal conductivity of greater than 110 W/mK and a relative density of at least 90% and a process for the production thereof are disclosed. The sintered body contains minor amounts of at least one compound... | 10/13/1992 |
| 5098623 | Method for producing ceramic composite materials containing silicon oxynitride and zirconium oxide A new group of ceramic composite materials containing silicon oxynitride (Si2 N2 O, O'-phase) and zirconium oxide (ZrO2) can be prepared using a thermal reaction between zirconium silicate (ZrSiO4) and silicon n... | 03/24/1992 |
| 4997604 | Method for production of molded articles of silicon nitride A reactively combined silicon nitride is produced in which the starting material is pure silicon powder or a powder mixture of pure silicon and its nitride. This material is subjected to cold isostatic pressing or a slip casting or diecasting process befo... | 03/05/1991 |
| 4994219 | Method for forming a high strength silicon nitride A method for forming a improved silicon nitride material characterized by high mechanical strength at high temperatures comprising a combination of approximately 0.5-6.0% by weight of strontium oxide, 2.0-12.0% by weight of yttrium oxide and the balance s... | 02/19/1991 |
| 4911870 | Method for production of sintered silicon nitride article A method for the production of a silicon nitride ceramics exhibiting high mechanical strength at elevated temperature is disclosed. This production is effected by a method which comprises preparing a mixture of silicon dioxide with excess carbon as a sili... | 03/27/1990 |
| 4909973 | Method for refining non-oxide ceramic powders A method for refining powders comprising the steps of: (a) adding polytetrafluoroethylene powders to non-oxide ceramic powders to form a mixture by mixing; and (b) heating the mixture in non-oxidizing atmosphere to convert oxides existing on the surface o... | 03/20/1990 |
| 4886556 | Method for production of sliding member A method for production of a sliding member exhibiting excellent mechanical strength, resistance to thermal shock, and resistance to corrosion at elevated temperature is produced by a process of manufacture which comprises firing a shaped mass of silicon ... | 12/12/1989 |
| 4818455 | High thermal conductivity ceramic body A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon ABCFGH of FIG. 2, a porosity of less than about 10% by volume, and a thermal conductivity greater than 0.70 W/cm.K at 25° C. which comprises ... | 04/04/1989 |
| 4781874 | Process for making silicon nitride articles A process for making silicon nitride articles such as an internal combustion valve (8) by coating or causing silicon to grow on powdered silicon nitride particles through a vapor phase reaction and then forming and nitriding the articles in substantially ... | 11/01/1988 |
| 4764321 | High thermal conductivity ceramic body A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon ABCDEFGH excluding line DE of FIG. 2, a porosity of less than about 10% by volume, and a thermal conductivity greater than 0.70 W/cm.multidot.... | 08/16/1988 |
| 4623498 | Method of improving quality of hot pressed Si3 N4 bodies A method of improving the quality of hot pressed Si3 N4 bodies is disclosed. Unpurified silicon powder and admixed oxygen carrying agents are compacted to form a preform. The preform is nitrided, facilitated by the presence of certai... | 11/18/1986 |
| 4578234 | Process of pressureless sintering to produce dense high thermal conductivity ceramic body of deoxidized aluminum nitride A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon JKLM but not including line MJ of FIG. 4 and a thermal conductivity greater than 1.00 W/cm.multidot.K at 25° C., preferably greater than 1.42... | 03/25/1986 |
| 4578364 | High thermal conductivity ceramic body of aluminum nitride A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon P1JFA4 but not including lines JF and A4F of FIG. 4, a porosity of less than about 10% by volume, and a thermal conductivity greater than 1.00... | 03/25/1986 |
| 4578365 | High thermal conductivity ceramic body of aluminum nitride A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon P1N1KJ but not including lines KJ and P1J of FIG. 4, and a thermal conductivity greater than 1.00 W/cm.multidot.K at 25° C. which comprises f... | 03/25/1986 |
| 4578233 | Pressureless sintering process to produce high thermal conductivity ceramic body of aluminum nitride A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon FJDSR but not including line RF of FIG. 4, a porosity of less than about 10% by volume, and a thermal conductivity greater than 1.00 W/cm.mult... | 03/25/1986 |
| 4578232 | Pressureless sintering process to produce high thermal conductivity ceramic body of aluminum nitride A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon LT1DM but not including lines LM and DM of FIG. 4, a porosity of less than about 10% by volume, and a thermal conductivity higher than 1.00 W/... | 03/25/1986 |
| 4552851 | Formation of yttrium aluminate as sintering aid for silicon nitride bodies A process is disclosed for reacting oxides of yttrium and aluminum.... | 11/12/1985 |
| 4510107 | Method of making densified Si3 N4 /oxynitride composite with premixed silicon and oxygen carrying agents A method is disclosed for making a more densified silicon nitride comprising object under less stringent heating conditions without sacrificing physical properties. A mixture of silicon powder, 6-18% yttrium silicon oxynitride (a major proportion of which... | 04/09/1985 |
| 4496503 | Method of making a densified silicon nitride/oxynitride composite A method of making a densified silicon nitride/oxynitride composite is disclosed. The method comprises: (a) shaping a substantially homogeneous powder mixture of silicon nitride, 6-18% yttrium silicon oxynitride of the Y10 Si6 O... | 01/29/1985 |
| 4492665 | Process for the production of mouldings from materials based on silicon nitride Process for the production of moulded bodies of materials based on silicon nitride, where the powder mix prepared by way of initial material contains silicon nitride (Si3 N4), a high proportion, preferably 40-85 percent by weight, of... | 01/08/1985 |
| 4443394 | Method of making a silicon nitride body from the Y2 O3 /SiO23 N4 /Al2 O3 A method is disclosed of making a fully dense silicon nitride comprising object by heating a silicon nitride mixture containing yttrium silicon oxynitride (at least 75% Y10 Si6 O24 N2) to full density without th... | 04/17/1984 |
| 4351787 | Process for sintering reaction bonded silicon nitride Sintered silicon nitride articles are prepared from a silicon nitride compact by forming a silicon powder containing one or more sintering additives for silicon nitride into a compact having at density of at least 1.3 g/cm3, said additives bein... | 09/28/1982 |
