Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a silicon carbide ceramic with high electric resistivity and a preparation method of the silicon carbide ceramic. The silicon carbide ceramic with high electric resistivity is characterized by being prepared from the following raw materials in pars by weight: 70-80 parts of silicon carbide, 2-3 parts of dimethicone, 2-4 parts of pre-gelatinized starch, 4-6 parts of germanium dioxide, 2-4 parts of opal glass, 15-20 parts of absolute ethanol, 2-3 parts of oxidized polyethylene wax, 14-18 parts of a chopped carbon fiber pre-dispersoid, 3-4 parts of a sintering aid and 80-90 parts of deionized water. The added chopped carbon fiber pre-dispersoid can improve the mechanical properties of silicon carbide, the fracture toughness of the ceramic and the strength and density of a biscuit and can meet the mechanical processing requirement. The silicon carbide ceramic composite material disclosed by the invention has high thermal conductivity, good thermal shock resistance, good corrosion resistance, long service life and high electric resistivity and can meet the requirements of the IT industry and the electrical equipment industry, and the preparation process of the silicon carbide ceramic composite material is simple, is safe to operate and can not cause pollution.
The invention discloses a silicon carbide ceramic with high electric resistivity and a preparation method of the silicon carbide ceramic. The silicon carbide ceramic with high electric resistivity is characterized by being prepared from the following raw materials in pars by weight: 70-80 parts of silicon carbide, 2-3 parts of dimethicone, 2-4 parts of pre-gelatinized starch, 4-6 parts of germanium dioxide, 2-4 parts of opal glass, 15-20 parts of absolute ethanol, 2-3 parts of oxidized polyethylene wax, 14-18 parts of a chopped carbon fiber pre-dispersoid, 3-4 parts of a sintering aid and 80-90 parts of deionized water. The added chopped carbon fiber pre-dispersoid can improve the mechanical properties of silicon carbide, the fracture toughness of the ceramic and the strength and density of a biscuit and can meet the mechanical processing requirement. The silicon carbide ceramic composite material disclosed by the invention has high thermal conductivity, good thermal shock resistance, good corrosion resistance, long service life and high electric resistivity and can meet the requirements of the IT industry and the electrical equipment industry, and the preparation process of the silicon carbide ceramic composite material is simple, is safe to operate and can not cause pollution.
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