Black silicon carbide is a high-quality carbon and silicon and petroleum coke, in the resistance furnace smelting by the high temperature above 2000 degrees made 46 hours or more. The hardness between corundum and diamond, corundum higher mechanical strength, brittle and sharp. 

 Abrasives are widely used in refractory material, oxygen etc; made of powder used by the electronics, aerospace and other high-tech enterprises