Silicon carbide is also known as carbonite. In the contemporary C, N, B and other non-oxide high-tech refractory raw materials, silicon carbide is the most widely used and the most economical one. Can be called gold steel sand or refractory sand.

Silicon carbide is made of quartz sand, petroleum coke (or coal coke), wood chips (salt is needed to produce green silicon carbide) and other raw materials in a resistance furnace by high temperature smelting. At present, China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two kinds, are hexagonal crystals, the specific gravity is 3.20 ~ 3.25, microhardness is 2840 ~ 3320kg/mm2.