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邮箱：dragonabrasives@163.com
地址：154 NANYANG ROAD, ZHENGZHOU 450057 CHINA.
电话：022 87899539 18137772579
传真：022 87899537
邮箱：dragonabrasives@163.com
Black silicon carbide
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.
Typical value of black silicon carbide physical & chemical performance index
| Type | Grit | Chemical composition（%） | Magnetic contents (%) |
Bulk density (g/cm3） |
||
| SiC | F.C | Fe2O3 | ||||
| Ｃ | F46 | 98.50 | 0.10 | 0.12 | 0.0107 | 1.45 |
| F120 | 98.00 | 0.13 | 0.18 | 0.0090 | 1.41 | |
| F180 | 98.00 | 0.12 | 0.19 | 0.0089 | 1.34 | |
| F360 | 97.50 | 0.15 | 0.19 | 0.0098 | 1.29 | |
| Ｃ－Ｂ Ｃ－Ｐ |
F46 P40 | 98.50 | 0.16 | 0.16 | 0.0150 | 1.45 |
| F120 P120 | 98.00 | 0.17 | 0.16 | 0.0119 | 1.40 | |
| F180 P180 | 98.00 | 0.19 | 0.23 | 0.0094 | 1.30 | |
| F360 P600 | 97.00 | 0.15 | 0.18 | 0.0108 | 1.27 | |
For vitrified wheels and belts: C
For organic wheels: C-B
For sheets: C-P
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 | |||||
| C-B C-P |
F12~F90 P12~P100 |
98.00 | 0.25 | 0.70 | F16-F30 P12-P30 |
0.075 |
| F100~F150 P120~P150 |
97.50 | 0.35 | 0.90 | F36-F60 P36-P60 |
0.065 | |
| F180~F220 P180~P220 |
96.00 | 0.35 | 1.35 | F70-F120 P80-P150 |
0.055 | |
| F150-F220 P180-P220 |
0.035 | |||||
Reference chemical composition of silicon carbide (TN) of non-abrasives application:
| Type | Reference chemical composition (%) | Size(mm) |
||
| SiC | F.C. | Fe2O3 | ||
| TN98 | ≥98.00 | <1.00 | <0.50 | 50~0 |
| TN97 | ≥97.00 | <1.50 | <0.80 | 13~0 |
| TN95 | ≥95.00 | <2.50 | <1.00 | 10~0 |
| TN90 | ≥90.00 | <3.00 | <2.50 | 5~0 |
| TN88 | ≥88.00 | <3.50 | <3.00 | 0.5~0 |
| TN85 | ≥85.00 | <5.00 | <3.50 | 100F |
| TN60 | ≥60.00 | <12.00 | <3.50 | 200F |
| TN50 | ≥50.00 | <15.00 | <3.50 | 325F |