Black silicon carbide SiC is black quartz sand and petroleum coke, high-quality silica as the main raw material, through the resistance furnace and. Its hardness between corundum and diamond, a mechanical strength higher than corundum, crisp and sharp
Black silicon carbide SiC is black quartz sand and petroleum coke, high-quality silica as the main raw material, through the resistance furnace and. Its hardness between corundum and diamond, a mechanical strength higher than corundum, crisp and sharp bjtm5899 126.com