Black Silicon Carbide (SiC) is a synthetic abrasive material produced by the high-temperature reaction of silica sand and petroleum coke in an electric resistance furnace. It is one of the hardest synthetic abrasives, with a Mohs hardness of 9.1-9.3, making it ideal for grinding, cutting, and polishing applications.
Applications of Black Silicon Carbide:
Abrasive Tools: Used in grinding wheels, sandpapers, and blasting media for metals, ceramics, and stone.
Refractory Materials: Added to refractory bricks for improved thermal shock resistance.
Metallurgical Use: Acts as a deoxidizing agent in steel production.
Lapping & Polishing: Used in precision finishing of hard materials like tungsten carbide.
Anti-Slip Surfaces: Incorporated into coatings for floors and pavements.
Semiconductor & Electronics: High-purity SiC is used in electronics due to its semiconductor properties (though black SiC is typically less pure than green SiC).
| JIS Grit Size | D0(Micron) | D3(Micron) | D50(Micron) | D94(Micron) |
| #240 | ≤ 127 | ≤ 103 | 57.0±3.0 | ≥ 40 |
| #280 | ≤ 112 | ≤ 87 | 48.0±3.0 | ≥ 33 |
| #320 | ≤ 98 | ≤ 74 | 40.0±2.5 | ≥ 27 |
| #360 | ≤ 86 | ≤ 66 | 35.0±2.0 | ≥ 23 |
| #400 | ≤ 75 | ≤ 58 | 30.0±2.0 | ≥ 20 |
| #500 | ≤ 63 | ≤ 50 | 25.0±2.0 | ≥ 16 |
| #600 | ≤ 53 | ≤ 41 | 20.0±1.5 | ≥ 13 |
| #700 | ≤ 45 | ≤ 37 | 17.0±1.5 | ≥ 11 |
| #800 | ≤ 38 | ≤ 31 | 14.0±1.0 | ≥ 9.0 |
| #1000 | ≤ 32 | ≤ 27 | 11.5.±1.0 | ≥ 7.0 |
| #1200 | ≤ 27 | ≤ 23 | 9.5±0.8 | ≥ 5.5 |
| #1500 | ≤ 23 | ≤ 20 | 8.0±0.6 | ≥ 4.5 |
| #2000 | ≤ 19 | ≤ 17 | 6.7±0.6 | ≥ 4.0 |
| #2500 | ≤ 16 | ≤ 14 | 5.5±0.5 | ≥ 3.0 |
| #3000 | ≤ 13 | ≤ 11 | 4.0±0.5 | ≥ 2.0 |
| #4000 | ≤ 11 | ≤ 8.0 | 3.0±0.4 | ≥ 1.8 |
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