The Material Structure of Silicon Carbide

Pure silicon carbide is a colorless and transparent crystal. Industrial silicon carbide appears light yellow, green, blue, and even black due to different types and contents of impurities, and its transparency varies with its purity. The silicon carbide crystal structure is divided into hexagonal or rhombohedron α- SiC and Cube β- SiC (also known as cubic silicon carbide). α- Due to the different stacking sequences of carbon and silicon atoms in its crystal structure, SiC forms many different variants, with over 70 species discovered. β- SiC transforms into α- SiC。 The industrial production method of silicon carbide is to use high-quality quartz sand and petroleum coke to refine in an electric resistance furnace. The refined silicon carbide blocks are crushed, washed with acid and alkali, magnetically separated, and screened or water separated to produce products of various particle sizes.