Product introduction of Black silicon carbide F240 F280 for glass lapping
Black silicon carbide F240 F280 for glass lapping gets a superior finishing effect on glass, marble, jade, and ceramics. It is featured by the high hardness of Mohs scale 9.2 and Vicker hardness 3000-3100kg/mm2. Black SiC abrasive powder is made from suspension treatment. It gets a uniform crystal size. So it can achieve a fine and consistent lapping surface.
Product Feature of Black silicon carbide F240 F280 for glass lapping
- High hardness with Mohs 9.2-9.3. Even at 2000℃, it still gets high strength.
- Good oxidation resistance and chemical stability at high temperatures.
- High thermal conductivity and low thermal expansion rate.
- High SiC purity and cleanness with low impurity and low magnetics.
- High bulk density.
- Particle size consistency.
Typical physical properties of Black silicon carbide F240 F280 for glass lapping
| Chemical composition | SiC:98-99.2% |
| Mohs Hardness: | 9.2-9.3 |
| Vicker hardness: | 2940-3200kg/mm2 |
| Specific Gravity: | 3.15-3.20 g/cm3 |
| Bulk density(LPD depends on the size): | 0.8-1.5 g/cm3 |
| Melting Point: | dissociated at about 2300 °C |
| Maximum service temperature: | 1900℃ |
| Particle shape: | Hexagonal |
| Modulus of Elasticity | 58-65×106 psi |
| Coefficient of Thermal Expansion | 3.9-4.5 x10-6 /°C |
| Thermal Conductivity (at 25°C) | 70-130 W/M·K |
| Raw material | Petroleum coke,quartz sand |
Typical chemical composition of Black silicon carbide F240 F280 for glass lapping
| Grade | ds50-value in μm | Typical Chemical Composition(%) | ||
| SiC | FC | Fe2O3 | ||
| F 230 | 53.0 ± 3 | 99.4 | 0.1 | 0.06 |
| F 240 | 44.5 ± 2 | 99.4 | 0.11 | 0.05 |
| F 280 | 36.5 ± 1.5 | 99.4 | 0.12 | 0.06 |
| F 320 | 29.2 ± 1.5 | 99.3 | 0.06 | 0.05 |
| F 360 | 22.8 ± 1.5 | 99.2 | 0.15 | 0.05 |
| F 400 | 17.3 ± 1 | 99.1 | 0.08 | 0.05 |
| F 500 | 12.8 ± 1 | 98.67 | 0.06 | 0.06 |
| F 600 | 9.3 ± 1 | 98.62 | 0.05 | 0.07 |
| F 800 | 6.5 ± 1 | 98.66 | 0.11 | 0.05 |
| F 1000 | 4.5 ± 0.8 | 98.63 | 0.13 | 0.07 |
| F 1200 | 3.0 ± 0.5 | 98.59 | 0.17 | 0.08 |
Application of Black silicon carbide F240 F280 for glass lapping
Grinding and polishing gem, jade, and jewelry.
Polishing glass shape and surface.
Lapping electronic ceramic components.
The raw material of silicon carbide abrasive tools.
Production details of Black silicon carbide F240 F280 for glass lapping
Packing of Black silicon carbide F240 F280 for glass lapping
- 25 kgs/PVC Bag with plastic inner bag.
- 1MT /Jumbo Bag
- 25 kgs/PVC Bag,40Bags/Jumbo Bag
- 1 Metric Ton/Jumbo Bag/Pallet
- 25 kgs/paper bag,1MT/Pallet
- Other customized packages are available
FAQ：
Q: Are you a manufacturer?
A: We are a manufacturer of both black silicon carbide and green silicon carbide materials. We began to produce silicon carbide powder since 1999.
Q: What grade of silicon carbide do you have?
A: We have several grades of silicon carbide powder including refractory grade, abrasive grade,etc.
Q: How will you check silicon carbide quality before delivery?
A: We will check the chemical composition, and cleanness of the carborundum grain and powder. And inspect the gradation, bulk density of SiC grain and powder.
Q: Do you support third-party quality inspection?
A: Yes, we are open to getting a third party quality test before delivery.
Q: Is the silicon carbide you supply reclaimed material?
A: No. We do the melting process by ourselves and don’t have reclaimed silicon carbide.
Q: What is the HS code of silicon carbide abrasive powder?
A: The HS code is 2849200000.
Q: Is there any restriction to export silicon carbide from China?
A: Yes, it needs to provide an export license to Chinese customs. We could provide it and make customs clearance in China.
Q: Are free samples available?
A: Yes, we provide free samples within 1 kg. Customers only need to bear the logistic cost.
Q: What is your annual capacity?
A: Our capacity is 1800-2000MT per month, annually appr. 22000 MT.
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