Black(Green)Silicon Carbide

Black silicon carbide is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw materials. Its hardness is between fused alumina and synthetic diamond. Mechanical intensity of it is higher than fused alumina. It is brittle and sharp and has electrical and heat 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.

Green silicon carbide is produced basically in the same way of black silicon carbide except the different requirement of raw materials. With higher purity of crystallization and hardness, when abrasive tools are of it, they are suitable of processing hard and brittle materials such as: Hard alloy, titanium alloy, bearing steel as well as some non-metallic materials including: Glass, agate, electrical ceramic, quartz products, rock. Green silicon carbide is also used as higher grade refractory materials, electrical heating element and elements for electrical appliances.