Black Silicon carbide Grit is produced by a process involving the electrochemical reaction of silica(SiO2)-in the form of quartz mixed with Carbon(C) in the form of raw petroleum coke. The stoichiometric mixture is reacted in an electrical resistance furnace at a temperature up to 2500 centigrade to yield high-quality crystals. The process is large furnace technology with a graphite electrode in the furnace center. The large crystals are then segregated, crushed, cleaned of magnetic impurities in high-intensity magnetic separators, and classified into narrow size fractions to suit the end-use. Dedicated lines produce products for different applications.
Properties of Black Silicon carbide Grit:
- High hardness and good grinding ability
- low density
- low thermal expansion, oxidation resistance
- excellent chemical resistance
- high thermal shock resistance, wear and hardness resistance,high-temperature resistance
- high-temperature strength
Applications of Black Silicon carbide Grit:
Blasting, surface Treatment, Rust Removal
Polishing and deburring
Grinding wheels
Wear resistance parts
TYPICAL CHEMICAL ANALYSIS | |
SiC | ≥98% |
SiO2 | ≤1% |
H2O3 | ≤0.5% |
Fe2O3 | ≤0.3% |
F.C | ≤0.3% |
Magnetic content | ≤0.02% |
TYPICAL PHYSICAL PROPERTIES | |
Hardness: | Mohs:9.2 |
Melting Point: | dissociated at about 2300 °C |
Maximum service temperature: | 1900℃ |
Specific Gravity: | 3.2-3.45 g/cm3 |
Bulk density(LPD): | 1.2-1.6 g/cm3 |
Color: | Black |
Particle shape: | Hexagonal |
Modulus of Elasticity | 58-65×106 psi |
Coefficient of Thermal Expansion | 3.9-4.5 x10-6/ ℃ |
Thermal Conductivity | 71-130 W/MK |
AVAILABLE SIZES Black Silicon carbide Grit
F-macro grits sizes bonded | |
Grit designation | Mean diameter in um |
F12 | 1765 |
F14 | 1470 |
F16 | 1230 |
F20 | 1040 |
F22 | 885 |
F24 | 745 |
F30 | 625 |
F36 | 525 |
F40 | 438 |
F46 | 370 |
F54 | 310 |
F60 | 260 |
F70 | 218 |
F80 | 185 |
F90 | 154 |
F100 | 129 |
F120 | 109 |
F150 | 82 |
F180 | 69 |
F220 | 58 |
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