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4500504 Process for preparing silicon carbide whiskers  
The process according to the present invention involves mixing 100 parts by weight of a silica gel, containing 6.0 to 25.0% by weight with respect to a silicon of a water-soluble compound of at...
4497787 Branched polycarbosilanes and their use in the production of silicon carbide  
Silicon carbide can be produced by the pyrolysis of branched polycarbosilanes which in turn are produced directly from selected monomer systems.
4492681 Method for the preparation of silicon carbide fibers  
The invention provides a novel method for the preparation of silicon carbide fibers capable of being performed at a relatively low temperature and giving fibers of relatively large lengths by the...
4482689 Process for the preparation of polymetallo(disily)silazane polymers and the polymers therefrom  
What is disclosed is a process for preparing R3 'SiNH-containing metallosilazane polymer containing boron, titanium, or phosphorous by contacting and reacting chlorine-containing disilanes and...
4482512 Making silicon carbide bodies  
Reaction-bonded SiC is made by steps which include preparing a porous preform of particulate SiC and a carbon yielding binder, heating the preform in to convert the binder to carbon, and while the...
4460697 Process for producing non-oxide powders  
Non-oxide powders such as carbides, nitrides, carbides/nitrides and borides are obtained by reducing an oxide powder in a reducing atmosphere, and after or concurrently with the reduction,...
4456634 Reaction sintered silicon carbide  
The impact resistance of hot pressed silicon carbide articles is improved by providing thereon a layer of material resulting from the reaction of silicon in a dilute hydrocarbon gas atmosphere. To...
4446169 Method for making silicon carbide coatings  
A method is disclosed for preparing a silicon carbide-coated substrate without subjecting the substrate to unnecessary thermal stress. A coating of a silicon carbide precursor polymer is placed on...
4432957 Method of producing silicon carbide bodies  
A significant improvement of the silicon impregnation depth of a carbon precursor body in the siliconizing thereof to make a silicon carbide body is obtained, as well as an accelerated conversion...
4425407 CVD SiC pretreatment for carbon-carbon composites  
Carbon-carbon composites are prepared to receive a subsequent protective coating by having a thin coating (0.1 to 5 mils) of chemically vapor deposited (CVD) SiC applied to its surface. The SiC...
4419336 Silicon carbide production and furnace  
An improved acheson furnace structure is shown having insulated gate means for increasing the volume of coarsely crystalline silicon carbide produced in each cycle of the furnace together with a...
RE31447 High yield silicon carbide pre-ceramic polymers  
Pre-polymers which are alkoxylated or phenoxylated methylpolysilanes are useful for the preparation of fine grained silicon carbide ceramic materials and silicon carbide-containing ceramics. The...
4415535 Apparatus for refining metal carbides containing free carbon  
Metal carbide powders containing free carbon which have heretofore been difficult to refine can be refined excellently by charging the metal carbide powders in a fluidizing bed consisting of...
4410502 Method for manufacture of silicon carbide  
Silicon carbide of improved quality is obtained by using a liquid silicic acid or modified liquid silicic acid as a silicic substance and carbon in a powdered form, a precursor of carbon in a...
4395460 Preparation of polysilazane polymers and the polymers therefrom  
What is disclosed is a process for preparing polysilazane polymers by contacting and reacting chlorine-containing disilanes with ammonia. The polysilazane polymers are useful as chemical...
4387080 Flaky β-silicon carbide and ceramics having laminar structure produced therefrom  
Flaky β-SiC mainly composed of β-SiC which is obtained from an organic silicon polymer containing the carbon and silicon atoms as the major skeletal component and the method for producing such...
4377563 Method of preparing silicon carbide  
A method of producing silicon carbide which comprises heating wet process white carbon in the presence of a carbon source.
4368181 Method of producing β-silicon carbide  
A method of producing inexpensive β-silicon carbide at a relatively low temperature and in a high yield, wherein a raw material mixture consisting of carbonaceous powder having a particle size of...
4366137 Process for producing silicon  
A process for producing silicon in which a reaction mixture consisting, on the one hand, of hot-pressed briquettes of silicon dioxide (quartz) and carbon and, on the other hand, of granular quartz...
4364974 Method of producing an intermediate in the production of silicon or silicon carbide  
A method of preparing an intermediate composition for the production of silicon or silicon carbide, wherein silicon dioxide particles (quartz sand) are coated with carbonaceous material in a...
4349636 Method for increasing the ductility and conductivity of refractory crystals  
A method for imparting ductility and very high electrical conductivity to very brittle refractory single crystals by subjecting said crystals to a hydrostatic deformation technique at room...
4342837 Sinterable silicon carbide powders and sintered body produced therefrom  
Silicon carbide powders suitable for producing sintered body having a high density are produced by reacting 1.7 to 2.1 parts by weight of silicon monoxide with 1.0 part by weight of finely divided...
4342712 Process for producing continuous inorganic fibers  
Continuous inorganic fibers consisting substantially of Si, Ti and C and optionally of O, said fibers being composed of (1) an amorphous material consisting substantially of Si, Ti and C and...
4327067 Method for refining metal carbides containing free carbon  
Metal carbide powders containing free carbon which have heretofore been difficult to refine can be refined excellently by charging the metal carbide powders in a fluidizing bed consisting of...
4325930 Producing a silicon carbide structure and multidirectional silicon carbide texture  
The method for producing a silicon carbide structure comprises the stages of immersing the carbon structure into a bath containing 20 to 40% by weight of silicon powder in suspension in a liquid...
4302372 Non-fired silicon carbide refractories  
A non-fired silicon-carbide base refractory mixture comprising 95 to 99.5% (in respect to the mixture) of silicon carbide containing 1.5 to 8% (in respect to the silicon carbide) of particles not...
4301132 Silicon carbide bodies and their production  
A reaction-sintered silicon carbide body having portions differing from each other in free silicon content and such a body with a surface layer rendered more readily abradable than the remainder...
4298559 High yield silicon carbide from alkylated or arylated pre-ceramic polymers  
Pre-polymers which are alkylated or arylated methylpolysilanes are useful for the preparation of silicon carbide ceramic materials. The pre-polymers exhibit ease of handling and their use to...
4293512 Making temperature-stable protectively coated graphite molded body  
In order to prevent a protective carbide layer on a graphitic molded article from splitting off under thermal stress, an external carbide layer is provided on a graphitic molded article having a...
4288495 Article coated with beta silicon carbide and silicon  
This application discloses a new powder composition which may be plasma sprayed onto the surface of an article to provide a protective coating therefor. The protective coating may be resistant to...
4284612 Preparation of SiC whiskers  
Organic fibers are oxidized, ground and blended with a source of silica. Heat treatment of the blend in the range of 1400° to 1700° C. results in the formation of SiC whiskers. Various fibers...
4283376 Method of producing silicon carbide fibers  
A process for producing polycarbosilane partly containing siloxane bonds, which comprises adding 0.01 to 15% by weight of polyborosiloxane having phenyl groups in at least a part of the side...
4283375 Production of SiC whiskers  
Silicon carbide whiskers useful for reinforcement of metals are manufactured from SiO2 and carbon. Rice hulls are ashed in air at approximately 620° C. to obtain amorphous SiO2, which is then...
4276275 Process for preparing ultrafine carbide powder  
A process for preparing ultrafine carbide powder of silicon or titanium and other carbide which are used as refractory materials comprises the steps of passing electric current to a carbon member...
4265843 Method of producing shaped silicon-carbide bodies  
In the production of shaped silicon-carbide bodies, especially tubes which onsist predominantly of silicon carbide throughout their thickness for use in nuclear-reactor technology, a...
4257337 Silicon carbide furnace side frames  
A side for a furnace used in the manufacture of silicon carbide from silicon dioxide and carbon comprises a plurality of gates which are removably affixed to the furnace or plant floor. Each gate...
4248844 Production of SiC from rice hulls and silica  
SiC whiskers are made by separating a quantity of rice hulls into two portions, carbonizing one portion in a non-oxidizing atmosphere, ashing the other portion in air, combining the carbonized...
4226914 Novel spraying composition, method of applying the same and article produced thereby  
This application discloses a new powder composition which may be plasma sprayed onto the surface of an article to provide a protective coating therefor. The protective coating may be resistant to...
4226841 Method of producing silicon carbide powder  
A method of producing a silicon carbide powder consisting of fine particles of uniform shape and size, comprising baking at 1,350° to 1,850° C. under a non-oxidizing atmosphere a powdery mixture...
4220600 Polycarbosilane, process for its production, and its use as material for producing silicon carbide fibers  
A process for producing polycarbosilane partly containing siloxane bonds, ich comprises adding 0.01 to 15% by weight of polyborosiloxane having phenyl groups in at least a part of the side chains...
4219519 Method for agglomerating carbonaceous fines  
Carbonaceous fines, such as coke fines, bituminous coal fines, anthracite coal fines, lignite fines, coal char, lignite char, wood char and mixtures thereof, are formed into hardened,...
4217335 Process for producing β-silicon carbide fine powder  
A process for producing a β-silicon carbide powder is disclosed wherein a ternary mixture of carbon, silicon and silica powders mixed in amounts falling within the region defined by the points O,...
4214920 Method for producing solar cell-grade silicon from rice hulls  
The present invention relates to the production of high purity solar grade silicon from common rice hulls. A unique process for material purification and reduction includes leaching the rice hulls...
4166841 Method for making pure beta silicon carbide  
A method is taught for making beta silicon carbide in a micro balloon structure, that is, a spherical type structure in which the beta silicon carbide forms only a thin wall of the balloon...
4164553 Plasma arc process for the production of chemical products in power form  
A plasma-arc process is disclosed for the production of powders of various chemical products, according to endothermic reactions, such as TiC and the like. The process consists essentially in...
4162167 Process and an apparatus for producing silicon carbide consisting mainly of beta-type crystal  
A process and an apparatus for producing silicon carbide consisting mainly of β-type crystal are disclosed. The fine silicon carbide consisting mainly of β-type crystal is produced by charging the...
4162301 Flexible microcrystalline zirconium carbide fabric  
Flexible metal carbide fabrics are produced by a process that involves the steps of: (a) impregnating a preformed organic polymeric fabric with a solution of a metal compound; (b) heating the...
4154787 Method for manufacturing silicon carbide bodies  
In accordance with the invention there is provided a method for manufacturing a reaction bonded silicon carbide body by heating, in a vacuum or an inert atmosphere, to at least the melting...
4153527 Manufacture of carbides and the like  
A metal processing furnace of the indirect arc type having opposed electrodes projected into and establishing an ionized atmosphere in the furnace crucible is provided with apparatus that...
4152194 Growth of silicon carbide crystals on a seed while pulling silicon crystals from a melt  
A saturated solution of silicon and an element such as carbon having a segregation coefficient less than unity is formed by placing a solid piece of carbon in a body of molten silicon having a...

Matches 301 - 350 out of 450 < 1 2 3 4 5 6 7 8 9 >