... ceramics, modification of coating and plastics, auto parts, war industry and aviation, steelmaking, etc.Black silicon carbide is classified into ... refractory industry, such as stemming, trough material, silicon carbide brick and other formed and amorphous products.Chemical composition ... .02.01.5 Note: Silicon carbide sand and powder for deoxidization of steelmaking in specification of 50, 60, 70, 80 ...