Silicon carbide chemical formula SiC, CAS number 409-21-2, is a light green to black crystal. It has high hardness at room temperature, high temperature resistance, corrosion resistance, and relatively stable chemical properties. It has high melting point, good thermal conductivity, adjustable resistivity, and does not react with most chemicals under normal conditions. In industry, it is mainly used as abrasives (such as grinding wheels, grinding powder), refractory materials, and also used for deoxidation and carburization in metallurgy; in the electronic field, it is used as a third-generation semiconductor material to produce high-temperature and high-voltage devices; in the new energy and automotive fields, it is used to improve power conversion efficiency.