Black SiC 50um 40um for Silicon carbide Ceramics
Black silicon carbide (Black SiC), also known as carborundum, is a synthetic abrasive and structural material with high hardness, excellent thermal conductivity, and chemical stability. When processed into 50μm and 40μm fine particle sizes, it serves as a critical raw material for manufacturing high-performance silicon carbide ceramics—a class of advanced ceramics widely used in aerospace, automotive, electronics, and energy industries.
Black SiC 50um 40um for Silicon carbide Ceramics Properties:
- Strong high-temperature chemical stability and corrosion resistance. Silicon carbide has very stable performance in temperature environments below 1000 ° C. When stable above 1000 ° C, a layer of silicon dioxide film forms on the surface of silicon carbide, which can still maintain stable physical and chemical properties of silicon carbide. The oxidation resistance of silicon carbide will only decrease when the temperature reaches above 1627 ° C.
- Superior thermal conductivity.The thermal conductivity of silicon carbide at room temperature is 60-200 W/(M · K). The theoretical thermal conductivity (thermal conductivity) of pure silicon carbide is 490 W/(M · K), which is higher than the thermal conductivity of most steel, copper, and aluminum. The thermal conductivity of the silicon carbide ceramic parts made is 120-170 W/(M · K). Has good thermal conductivity.
- Silicon carbide has a lower coefficient of thermal expansion and thermal shock resistance.At a temperature of 25-1400℃, the average coefficient of thermal expansion of silicon carbide is 4.4×10-6/℃, which is lower than that of refractory materials made of aluminum oxide.
- High hardness, toughness and wear resistance.Mohs scale hardness of black silicon carbide is 9.2-9.3, Mohs scale hardness of green silicon carbide is 9.4-9.5, and Vickers hardness is 3100-3400kg/mm2. The hardness of silicon carbide will also decrease with the increase of temperature. At a high temperature of 1200 degrees, the hardness of silicon carbide can reach twice that of aluminum oxide.
- High toughness. The toughness of silicon carbide abrasives refers to the difficulty of crushing under external forces. Taking 46 mesh as an example, the toughness tested by static pressure method is approximately 68-78%. The mechanical strength of silicon carbide is higher than that of corundum. Taking 120 mesh particle size as an example, the compressive strength of silicon carbide is 186KN/cm2, and the compressive strength of corundum abrasive is 100KN/cm2.
- Uniform particle size. The particle size range is narrow, with good fluidity and dispersibility.
- High cleanliness. Low free carbon content, and low impurities.
Black SiC 50um 40um for Silicon carbide Ceramics Applications:
- Reaction bonded silicon carbide ceramics, ceramic wear parts
- Silicon carbide seals
- Silicon carbide filter for foundry
- DPF three-way catalyst ceramic parts
- Foam ceramics
- Silicon carbide desulfurization nozzle
| 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(depends on the size) |
| 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:
| 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 |
Black SiC 50um 40um for Silicon carbide Ceramics Production:
Black SiC 50um 40um for Silicon carbide Ceramics Package:
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