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Grinding Rock Carborundum

Silicon carbide sic, also known as carborundum k r b r n d m , is a semiconductor containing silicon and carbon.It occurs in nature as the extremely rare mineral moissanite.Synthetic sic powder has been mass-produced since 1893 for use as an abrasive.Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in.