... used in abrasive, refractory and ceramic industry.CF-16 is a black, friable, medium bulk density silicon ... wheels. As loose grains, it is widely used for pressure blasting, surface finish and other general ... Physical Properties:Color BlackShape AngularCrystal Form Alpha silicon carbide in hexagonal systemSpecific Gravity 3.21Hardness ... , 500, 600, 800, 1000, 1200. Black Silicon Carbide used for Ceramic