Matches 101 - 150 out of 231 < 1 2 3 4 5 >


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5011790 Method of manufacturing cubic boron nitride p-n junction body  
In a method of manufacturing a cubic boron nitride p-n junction body, cBN seed crystals (1) of a first conductivity type are made coexist with original BN (3) and a solvent (2) containing a doping...
5010045 Low-loss binder for hot pressing boron nitride  
Borazine derivatives used as low-loss binders and precursors for making ceramic boron nitride structures. The derivative forms the same composition as the boron nitride starting material, thereby...
4997633 Water-soluble boron containing impurity reduced hexagonally crystalline boron nitride  
A hexagonally crystalline boron nitride containing water-soluble boron containing impurity in such a magnitude that amount of boron to be contained in an extract after boiling at 100° C. of pure...
4971779 Process for the pyrolytic conversion of a polymeric precursor composition to boron nitride  
The disclosure is directed to polymeric B-aminoborazene compounds suitable for pyrolytic conversion to boron nitride. The B-aminoborazene compounds are preferably mixed with an organic solvent and...
4948762 Process for the preparation of finely divided carbides and nitrides from ceramic precursor-compounds  
Carbides, nitrides or carbonitrides of elements from the main groups III and IV and sub-groups III, IV, V and VI of the periodic system of elements are prepared by (i) reacting compounds of the...
4946713 Poly(alkenylpentaborane) ceramic precursors  
Novel poly(alkenylpentaboranes) such as poly-2-vinylpentaborane are useful as precursors to BN or B4 C ceramics. The non-crosslinked poly(alkenylpentaboranes), which are soluble in common inert...
4913887 Production of boron nitride  
A process for producing boron nitride comprises heating a mixture consisting of borohydride of alkali metal and ammonium chloride at a temperature range of from 800° to 2200° C. in a non-oxidizing...
4900526 Polycrystalline rhombohedral boron nitride and method of producing the same  
The specification discloses a polycrystalline boron nitride of high purity and high density consisting essentially of rhombohedral crystals in which the three-fold rotation axes, parallel to the...
H000736 Process for making boron nitride using sodium cyanide and boron  
This a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white...
4891339 Process and apparatus for the flame preparation of ceramic powders  
There is disclosed a novel process and apparatus for continuously producing very fine, ultrapure ceramic powders from ceramic precursor reactants in a self-sustaining reaction system in the form...
4883648 Cubic boron nitride manufacture  
A method is provided for producing large cubic boron nitride crystals having the size of 0.1 carat or larger. The method involves providing a reaction vessel which contains CBN seed material (32),...
4865830 Gas phase preparation of aluminum nitride  
Admixing an aluminum alkyl, and optionally a boron compound, with a hydride of nitrogen in the gas phase and maintaining a gas phase temperature, optionally in the presence of a carrier gas, and...
4857490 Process of manufacturing boron ceramics from carboralated diacetylene polymers  
Boron-containing ceramics are formed from organoboron precermaic polymers which are carboralated acetylenic poolymers. The polymers can be formed by carboralating acetylenic or diacetylenic diols...
4851203 Metal carbide and nitride powders  
Metal carbide and metal nitride powders produced by the carbothermal reduction of one or more metal oxides reacted with a binder material and a carbonaceous additive or optionally, a binder...
4818511 Process and apparatus for producing non-oxide compounds  
A process for producing non-oxide compounds such as silicon nitride and silicon carbide by using a multi-stage apparatus constructed of a raw material drier section, a reactor section including a...
4810479 Preparation of cubic boron nitride using as a flux a fluoronitride  
A process for producing cubic boron nitride comprises heating at an elevated temperature and under high pressure a source of boron and a source of nitrogen in the presence of a fluoronitride or a...
4800183 Method for producing refractory nitrides  
A process for making fine, uniform metal nitride powders that can be hot pressed or sintered. A metal salt is placed in a solvent with Melamine and warmed until a metal-Melamine compound forms....
4798701 Method of synthesizing amorphous group IIIA-group VA compounds  
A method of synthesizing amorphous Group IIIA-Group VA compounds. A first solution is prepared which consists of a tris(trialkylsilyl) derivative of either a Group IIIA or Group VA element...
4784978 Hexagonal boron nitride powder having excellent sinterability and a method for the preparation thereof  
The powder of hexagonal boron nitride is prepared by heat-treating a powdery mixture composed of an oxygen-containing boron compound, e.g. boric acid, and a nitrogen compound, e.g. dicyandiamide...
4784839 Method of making metal carbide and nitride powders  
Metal carbide and metal nitride powders produced by the carbothermal reduction of one or more metal oxides reacted with a binder material and a carbonaceous additive or optionally, a binder...
4772304 Transparent BN-type ceramic material and method of producing the same  
A transparent BN-type ceramic material comprising 10 to 40 wt. % of boron (B), 35 to 55 wt. % of nitrogen (N) and 3 to 40 wt. % of silicon (Si) as the main component elements, and 1 to 10 wt. % of...
4772575 Method of manufacturing sintered compact of cubic boron nitride  
A sintered compact of cubic boron nitride is made by adsorbing and/or diffusing 0.005 to 1.000 percent by weight of water into a boron nitride compact containing alkaline earth metal boron nitride...
4764489 Preparation of mixed boron and aluminum nitrides  
Method for making a ceramic mixture of boron and aluminum nitrides in the ratio of about 0.2 to 20 g atoms of aluminum per g atom of boron, and method for making shaped articles of the ceramic and...
4749556 Process for producing boron nitride  
A process for producing boron nitride which comprises providing a nitrogen-containing nitride promoter, preferably melamine or dicyandiamide, in contact with an admixture of boron oxide and a...
4714599 Process for preparing rhombohedral system boron nitride using NaBH4 -and NH4 Cl  
A process for preparing rhombohedral system boron nitride, which comprises mixing NaBH4 with at least an equimolar amount of NH4 Cl, and heating the resulting mixture in a non-oxidizing atmosphere...
4699687 Method of synthesizing cubic system boron nitride  
Cubic system boron nitride crystals are synthesized by using a synthesizing vessel separated into a plurality of synthesizing chambers by one or more partition layers. After preparing the...
4690841 Pyrolytic boron nitride article  
A pyrolytic boron nitride article has a uniform structure 0.5 or less nodules/cm2 in average all through the overall surface of the article and 2 or less nodules in any portion of a unit square...
4662801 Cutting tool  
This invention relates to a tool for use in carrying out a cutting process, and more particularly to a cutting tool formed so that it can be sued to cut an iron material of a high hardness and...
4634640 Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for their manufacture by isostatic hot-pressing  
The invention is a shaped article of boron nitride having a density of at least 95% of the theoretical density which consists of polycrystalline hexagonal boron nitride in the form of a...
4590034 Method for preparing sintered body containing cubic boron nitride and method for preparing cubic boron nitride  
Disclosed is a method for preparing a sintered body containing cubic boron nitride which comprise the steps of contacting a starting material containing boron nitride and/or a starting material...
4565747 Boron nitride containing titanium nitride, method of producing the same and composite ceramics produced therefrom  
Boron nitride containing titanium nitride in an amount of 0.05 to 10 wt. % which is produced at a relatively low temperature, utilizing a chemical vapor deposition technique. In the deposition...
4562050 Process for producing boron nitride  
A process for producing boron nitride is described, comprising reacting at least one boron compound selected from the group consisting of boric acid and metal salt thereof and at least one...
4562163 Boron nitride complex and process for its preparation, and process for preparing a light-transmitting dense body of cubic system boron nitride  
A boron nitride complex comprising hBN in which lithium or an alkaline earth metal is diffused and supported in the form of its boron nitride. The boron nitride complex is prepared by heating hBN...
4556416 Process and apparatus for manufacturing fine powder  
A process and an apparatus for manufacturing a fine powder of metals or ceramics are proposed in which a mixed gas of volatile metal compound and/or evaporated metal and a reaction gas is reacted...
4551316 Process for producing boron nitride of cubic system  
A boron nitride type compound of the formula: LiMBN2 where M is calcium or barium and other similar compounds are provided. These compounds are prepared by heating a mixture of (i) finely divided...
4551195 Method for growing boron nitride crystals of cubic system  
Cubic boron nitride crystals are grown by subjecting reaction materials of low pressure phase boron nitride, a solvent material, and cubic boron nitride seeds to pressure and temperature...
4545968 Methods for preparing cubic boron nitride sintered body and cubic boron nitride, and method for preparing boron nitride for use in the same  
There are disclosed methods for preparing cubic boron nitride sintered body. One method involves pyrolyzing borazine and/or a borazine derivative to obtain a boron nitride; mixing said boron...
4544535 Method or preparing nonlaminating anisotropic boron nitride  
Non laminating anisotropic boron nitride is prepared by reacting a boron halide with ammonia at a temperature of from 1100° C. to 1600° C. in the presence of a small amount of a volatile oxygen...
4518659 Sweep through process for making polycrystalline compacts  
The high pressure/high temperature catalyst sweep through process for making diamond and cubic boron nitride compacts has been improved by adding an intermediate metal or metal alloy. The added...
RE31788 Process for producing metallic nitride powder  
Fine metallic nitride powders having a high purity are prepared, without causing any plugging or other problems in the reaction apparatus and with easy heat control of the reaction, by reacting a...
4490192 Stable suspensions of boron, phosphorus, antimony and arsenic dopants  
Semiconductor doping compositions comprising a suspension of (a) a dopant material, in the form of finely divided spherical particles of narrow size distribution from about 0.1 D to D, where D is...
4483836 Method of producing diamond and/or diamond-like modifications of boron nitride  
A method of producing diamond and/or diamond-like modifications of boron nitride from a material to be transformed, such material being carbon and/or boron nitride, with the use of explosive...
4469802 Process for producing sintered body of boron nitride  
A process for producing a sintered body of cubic system boron nitride comprises steps of: (a) mixing raw material boron nitride selected from the group consisting of hexagonal system boron...
4443420 Process for producing cubic system boron nitride  
Cubic system boron nitride from rhombohedral system boron nitride is produced by a shock wave compression method. The process comprises applying a thermodynamically stable pressure to rhombohedral...
4419335 Process for producing rhombohedral system boron nitride  
Rhombohedral system boron nitride is produced by heating a boron material selected from the group consisting of boron oxide, boric acid and an oxygen-containing boron compound capable of forming...
4409193 Process for preparing cubic boron nitride  
A process for preparing cubic boron nitride comprises heating hexagonal boron nitride and magnesium boron nitride at a temperature of at least 1350° C. under a pressure at which the cubic boron...
4402925 Porous free standing pyrolytic boron nitride articles  
A sponge-like free-standing pyrolytic boron article is made by reacting ammonia and gaseous boron halide diluted with an non-oxidizing gas to deposit pyrolitic boron nitride on a porous substrate...
4389223 Surface characteristics of boron rich cubic boron nitride  
Boron rich cubic boron nitride suitable for use in electroplating processes (e.g. nickel plating) has been made by an acid leaching process. Boron rich aggregated cubic boron nitride grinding...
4361543 Process for producing polycrystals of cubic boron nitride  
A process for producing polycrystals of cubic boron nitride which comprises exposure of hexagonal boron nitride to a pressure of from 40 to 70 kbar at a temperature of from 1,200° to 1,800° C....
4354986 Process for manufacturing boron nitride fiber mats using a needler  
A process is disclosed for producing a non-woven, boron nitride fiber mat, suitable for use as an electric cell separator in a lithium-sulfide battery. Molten boron oxide is centrifugally spun...

Matches 101 - 150 out of 231 < 1 2 3 4 5 >