1,Sic 99%max 2,ISO9001 ♦ The black silicon carbide is of high hardness ... good thermal conductivity and quick heat dissipation.♦ Black silicon carbide is produced in an electric ... white cast iron, bronze, brass, ore, bone, glass, leather, rubber, plastic and the thermal sensitive material.3. Partical size,Black ... 0.30 0.40 0.400.60 0.80 1.20 1.50 1.70P P12 - P100 P120 - P150 P180 ... 5 0.60 0.80 1.20