Black silicon carbide is produced at high temperature in an electric resistance type furnace with quartz sand and petroleum coke as its main raw materials. Its hardness is between fused alumina and synthetic diamond. The mechanical intensity of it is higher than fused alumina. It is brittle and sharp and has electrical and heat conductivity in some degree. The abrasives made of it are suitable for working on cast iron, non-ferrous metal, rock, leather, rubber, etc. It is also broadly used as refractory material and metallurgical additive.
Black Silicon Carbide Chemical Composition & Magnetic Contents of China GB/T2480-1996
GB/T 2480-1996 | Chemical Composition(%,by weight) | Magnetic contents |
Type | Grit size | SiC ≥ | F.C ≤ | Fe2O3 ≤ | Grit size | Magnetic contents (%) ≤ |
C | F12~F90 P12~P100 | 98.50 | 0.20 | 0.60 | F16-F30 P12-P30 | 0.030 |
F100~F150 P120~P150 | 98.00 | 0.30 | 0.80 | F36-F60 P36-P60 | 0.025 |
F180~F220 P180~P220 | 97.00 | 0.30 | 1.20 | F70-F120 P80-P150 | 0.020 |
| | | | F150-F220 P180-P220 | 0.015 |