99% silicon carbide powder 0.5um
99% silicon carbide powder 0.5um is an ultrafine SiC powder. High temperature resistance, wear resistance, oxidation resistance, good thermal conductivity, and low thermal expansion rate are extraordinary features of the powder. Silicon carbide powder 0.5um produced by wet method has high purity, large specific surface area, narrow particle size range, and high surface activity. It is a commonly used material for producing silicon carbide ceramics, mainly used for pressureless sintering of silicon carbide ceramic products.
Chemical composition:
| Chemical | Guarantee Value | Tested Value |
| SiC | ≥99% | 99.58% |
| SiO2 | ≤0.15% | 0.10% |
| Fe2O3 | ≤0.07% | 0.01% |
| F.C | ≤0.10% | 0.02% |
| F.Si | ≤0.15% | 0.08% |
| T.O | ≤0.8% | 0.259% |
Physical index:
| Mohs Hardness | 9.4-9.5 |
| Vickers hardness | 33-34 GPa |
| Specific Gravity | 3.2-3.45 g/cm3 |
| Bulk density(LPD depends on the size) | 0.6-1.5 g/cm3 |
| Color | Gray Green |
| Particle shape: | Hexagonal |
| Modulus of Elasticity | 58-65×106 psi |
| Coefficient of Thermal Expansion | 4.0-4.8 x10-6 /°C |
| Thermal Conductivity (at 25°C) | 60-200W/M·K |
| crystalline phase | α-SiC |
| PH | 3-3.5 |
| BET | 12-16 m2/g |
Specification：
| Size | Guarantee Value | Typical Value |
| D10(um) | 0.36-0.38 | 0.363 |
| D50(um) | 0.5-0.6 | 0.557 |
| D90(um) | 0.86-0.89 | 0.867 |
Characteristics:
- High purity. The low content of impurities such as iron, silicon, free carbon, and free silicon in 99% content silicon carbide powder is conducive to the excellent performance of silicon carbide.
- High Surface area.
- Narrow particle size range.
- Low thermal expansion and strong antioxidant properties. Excellent thermal stability.
- Excellent chemical resistance not reacting with strong acids and bases.
- High refractory temperature and excellent thermal shock resistance.
- High wear resistance and hardness.
- High temperature resistance and temperature strength.
Applications:
Silicon carbide ceramic sealing rings, silicon carbide bearings, silicon carbide shaft sleeves, and other pressureless sintered ceramics.
Production details of silicon carbide powder:
Packing of silicon carbide powder：
FAQ:
Q: What is the difference between green silicon carbide and black silicon carbide?
A: First of all, Green silicon carbide has a higher purity of SiC(99%), black silicon carbide SiC purity is min 98%. Secondly, green silicon carbide is harder than black silicon carbide.
Q: Is the green silicon carbide powder from you by airflow sieving or water sieving?
A: Our green silicon carbide powder is made by the water sieving process(suspension treated). So the particles are of high consistency.
Q: What are the HS code and CAS NO. of silicon carbide?
A: HS code is 2849200000. CAS NO. is 409-21-2.
Q: Is there any restriction to export silicon carbide material from China?
A: Yes, it has to get an export license to export. We will provide it to customs.
Q: How many kgs of free samples can we get?
A: We provide free samples of less than 1 kg. Clients have to bear the express cost and DGM certificate cost.
Q: How do you inspect products before delivery?
A: We will check items of chemical, density, particle size distribution, and packing before delivery. After delivery, we keep samples of each batch for 3 months.
Q: Do you demand MOQ?
A: MOQ is 1 bag, always goes 25kgs. The transportation cost will be higher than that of 1MT.
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