1,Sic 99%max 2,ISO9001 ♦ The black silicon carbide is of high hardness, brittleness.♦ Chemical washed and ... conductivity and quick heat dissipation.♦ Black silicon carbide is produced in an electric resistance furnace from quartz sand ,petroleum coke and ... ore, bone, glass, leather, rubber, plastic and the thermal sensitive material.3. Partical size,Black silicon carbide F12-320# F320-2000# JIS240 ...