摘要:
A high-purity silicon carbide powder and its production method enable mass production of the high-purity silicon carbide powder at low cost in a safe manner. The content of impurities in the silicon carbide powder is 500 ppm or less. The silicon carbide powder can be obtained by heating a raw material for silicon carbide production in an Acheson furnace using a heat generator. The raw material for silicon carbide production is prepared by mixing a siliceous raw material and a carbonaceous raw material. The raw material for silicon carbide production contains the siliceous raw material and the carbonaceous raw material at a mixture mole ratio (C/SiO2) of 2.5 to 4.0 and has a content of impurities of 120 ppm or less.
摘要:
A high-purity silicon carbide powder and its production method enable mass production of the high-purity silicon carbide powder at low cost in a safe manner. The content of impurities in the silicon carbide powder is 500 ppm or less. The silicon carbide powder can be obtained by heating a raw material for silicon carbide production in an Acheson furnace using a heat generator. The raw material for silicon carbide production is prepared by mixing a siliceous raw material and a carbonaceous raw material. The raw material for silicon carbide production contains the siliceous raw material and the carbonaceous raw material at a mixture mole ratio (C/SiO2) of 2.5 to 4.0 and has a content of impurities of 120 ppm or less.
摘要:
A particle formed of silica and carbon having a low impurity content and an excellent reactivity is provided. Also provided is a method of producing a silica and carbon-containing material including: (B) a carbon mixing step of mixing an aqueous alkali silicate solution having a silicon concentration within the liquid portion of at least 10 wt % with carbon so as to obtain a carbon-containing aqueous alkali silicate solution; and (C) a silica recovery step of mixing the carbon-containing aqueous alkali silicate solution with a mineral acid so as to cause carbon and silicon within the liquid portion to precipitate as particles formed of silica and carbon and thus obtaining a particle-containing liquid substance, then solid-liquid separating the liquid substance so as to obtain a solid portion of a silica and carbon-containing material which is an assembly of particles formed of silica and carbon and a liquid portion containing impurities.
摘要:
A device includes a substrate, a metal layer being formed in a region on a part of the substrate, and a first insulating film being provided on the substrate and the metal layer and including a trench provided at a position corresponding to a part or all of a region where the metal layer is not provided.
摘要:
A device includes a substrate, a metal layer being formed in a region on a part of the substrate, and a first insulating film being provided on the substrate and the metal layer and including a trench provided at a position corresponding to a part or all of a region where the metal layer is not provided.
摘要:
A particle formed of silica and carbon having a low impurity content and an excellent reactivity is provided. Also provided is a method of producing a silica and carbon-containing material including: (B) a carbon mixing step of mixing an aqueous alkali silicate solution having a silicon concentration within the liquid portion of at least 10 wt % with carbon so as to obtain a carbon-containing aqueous alkali silicate solution; and (C) a silica recovery step of mixing the carbon-containing aqueous alkali silicate solution with a mineral acid so as to cause carbon and silicon within the liquid portion to precipitate as particles formed of silica and carbon and thus obtaining a particle-containing liquid substance, then solid-liquid separating the liquid substance so as to obtain a solid portion of a silica and carbon-containing material which is an assembly of particles formed of silica and carbon and a liquid portion containing impurities.
摘要:
A method for cutting a honeycomb molded body includes applying laser in a wavelength range of from about 0.7 μm to about 2.5 μm to the honeycomb molded body to form a cut guide groove on a periphery of the honeycomb molded body. The honeycomb molded body is made of a material including silicon carbide. The honeycomb molded body is manufactured by extrusion molding. The honeycomb molded body has a number of cells, a cell wall interposed between the cells and a peripheral wall formed on a side face of the honeycomb molded body. The cells are placed in parallel with one another in a longitudinal direction of the cells. The honeycomb molded body is cut along the cut guide groove to a predetermined length using a wire.