Black silicon carbide
Black silicon carbide is produced at high temperature in an electric resistancetype with quarts sand and petroleum coke as its main raw marterials.Its hardness is between fused alumina and synthetic diamond.Mechanical intensity of it is higher than fused alumina.It is brittle and sharp and hasectrical and conductivity in some degree. The abrasives made of it are suitable for working on cast iron,non-ferrous metal,rock,leather,rubber,etc.It is also broadly used as refractory material and Metallurgical additive.]