Silicon carbide, with the chemical symbol SiC, is a solid industrial mineral crystalline. It is commonly referred to as carborundum. Silicon carbide exists naturally in an extremely rare mineral called moissanite. Pure silicon carbides appear as colorless and transparent crystals. When impurities are added, such as nitrogen or aluminum, silicon carbide crystals appear green or blue, depending on the level of impurity. Silicon carbide is mostly used for its hardness and strength, Silicon carbideexcellent in the refractory, coating abrasives, reaction bonded abrasives, ceramic.

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