Sintered silicon carbide sealing ring is formed by sintered sub micron silicon carbide powder in the vacuum sintering furnace at 2100 degrees centigrade. Because of the single-phase fine crystalline structure,ssic ceramic seal rings can keep high strength at high temperature, silicon carbide seal ring is with high purity and high density,also has strong corrosion resistance. Its excellent surface finish characteristics make it very suitable for application in mechanical sealing surface, valve, bearing and oil, chemical, aerospace, automotive and other fields.