Tianjin Global Alloy Material Co., Ltd.

Silicon carbide (SIC) is made from quartz sand and carbon( anthracite coal tar or petroleum coke) in electric esistance furnace at high temperature. It has the characteristic of high hardness, excellent electrical and heat conductivity, low thermal expansion, and high abrasion resistance.

Silicon carbide has a rich variety of crystal structures, which endow it with unique properties. As mentioned before, the two main crystal structures are α-SiC and β-SiC. The different stacking sequences of carbon-silicon layers in these structures lead to differences in physical and chemical properties. For example, α-SiC with a hexagonal or rhombohedral structure often shows better high-temperature stability, while β-SiC with a cubic zinc blende structure may have some unique electrical properties in certain applications. In addition to the basic crystal structures, SiC also exists in a large number of polytypes, which further enrich its property spectrum.