... good hardness and toughness, high efficiency and durability. Black silicon carbide is produced at high temperature in electric resistance type ... grinding wheels, cutting wheels, mounted wheels, oil stone, abrasive media, and also suitable for surface gringing, lapping or ... It is also broadly used as high-grade refractory material and metallurgical additive. BrandSiCCSi+Sio2Fe2o3MgoH2o≥≤SiC95950.621.2--0 ...