Black Silicon Carbide Refractory Abrasives Material

When silicon carbide material is heated to 1300℃ in air, a silicon dioxide protective layer begins to form on the surface of its silicon carbide body. As the protective layer thickens, the internal silicon carbide is prevented from continuing to be oxidized, which makes silicon carbide have better oxidation resistance. When the temperature reaches above 1900K (1627℃), the silicon dioxide protective film begins to be destroyed and the oxidation of silicon carbide intensifies, so 1900K is the highest operating temperature of silicon carbide in an oxidant atmosphere.

Acid and alkali resistance: In terms of resistance to acid, alkali and oxides, due to the effect of the silicon dioxide protective film, silicon carbide has strong acid resistance and slightly poor alkali resistance.

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