Also known as silicon carbide the emery or refractory sand. Silicon carbide is with quartz sand, petroleum coke (or char), sawdust (the production of green silicon carbide need to add salt) and other raw materials at high temperature in a resistance furnace smelting. China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two are hexagonal crystal, specific gravity of 3.20 to 3.25 that the microhardness for 2840 to 3320kg/mm2.
As abrasive, can be used for grinding tools, such as grinding wheel, Whetstone, grinding, sand tile class. As metallurgical deoxidizer and high temperature materials. silicon carbide producers there are four main areas: functional ceramics, refractory, abrasive and metallurgical raw materials. Silicon carbide coarse material has a large number of supply, can not be considered high-tech products with high technological content nanoscale silicon carbide powder short time is impossible to form economies of scale. A single crystal of high purity, can be used in the manufacture of semiconductors, the manufacture of silicon carbide fibers.