Silicon carbide black grinding powder
Product introduction of Silicon carbide black grinding powder
Silicon carbide black grinding powder is an artificial abrasive made of carbonaceous materials and siliceous materials through high-temperature smelting in a large resistance furnace. The carbonaceous material is petroleum coke or coal coke. And the siliceous material always goes quartz sand. At the same time, the smelting process will also add wood chips, salt and other additives.
The purity of the silicon carbide of the A-grade black silicon carbide is more than 98%. The color is shiny, and the reflection shows multicolored colors. Generally, the higher the purity of silicon carbide, the better its physical and chemical properties. The hardness of black silicon carbide is slightly lower than that of green silicon carbide, with a Mohs hardness of 9.2-9.3. Haixu black silicon carbide powder is produced by crushing, washing, screening, magnetic separation, suspension treated processes. It has the characteristics of high purity, high cleanliness, even particle size distribution,high packing density, and low impurities.
Silicon carbide black grinding powder typical chemical composition
| SiC | ≥98% |
| SiO2 | ≤1% |
| H2O3 | ≤0.5% |
| Fe2O3 | ≤0.3% |
| F.C | ≤0.3% |
| Magnetic content | ≤0.02% |
Silicon carbide black grinding powder typical physical properties
| Hardness: | Mohs:9.2 |
| Melting Point: | dissociated at about 2300 °C |
| Maximum service temperature: | 1900°C |
| 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/°C |
| Thermal Conductivity | 71-130 W/MK |
Silicon carbide black grinding powder available sizes
| P-Grit size | D0（um） | D3(um) | D50(um) | D95(um) |
| P240 | Max. 110 | Max. 81.7 | 58.5±2.0 | Min. 44.5 |
| P280 | Max. 101 | Max. 74.0 | 52.2±2.0 | Min. 39.2 |
| P320 | Max. 94 | Max. 66.8 | 46.2±1.5 | Min. 34.2 |
| P360 | Max. 87 | Max. 60.3 | 40.5±1.5 | Min. 29.6 |
| P400 | Max. 81 | Max. 53.9 | 35.0±1.5 | Min. 25.2 |
| P500 | Max. 77 | Max. 48.3 | 30.2±1.5 | Min. 21.5 |
| P600 | Max. 72 | Max. 43.0 | 25.8±1.0 | Min. 18.0 |
| P800 | Max. 67 | Max. 38.1 | 21.8±1.0 | Min. 15.1 |
| P1000 | Max. 63 | Max. 33.7 | 18.3±1.0 | Min. 12.4 |
| P1200 | Max. 58 | Max. 29.7 | 15.3±1.0 | Min. 10.2 |
| P1500 | Max. 53 | Max. 22.4 | 12.6±1.0 | Min. 8.3 |
| P2000 | Max. 45 | Max. 19.3 | 10.3±0.8 | Min. 6.7 |
| P2500 | Max. 38 | Max. 14.0 | 8.4±0.5 | Min. 5.4 |
| P3000 | Max. 32 | Max. 12.0 | 6.7±0.5 | Min. 3.0 |
| P4000 | Max. 27 | Max. 11.0 | 5.5±0.5 | Min. 2.0 |
| P5000 | Max. 23 | Max. 8.0 | 4±0.5 | Min. 1.8 |
| 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 |
| #6000 | ≤ 8.0 | ≤ 5.0 | 2.0±0.4 | ≥ 0.8 |
| #8000 | ≤ 6.0 | ≤ 3.5 | 1.2±0.3 | ≥ 0.6 |
| Grit Size | D3(um) | D50(um) | D94（um) |
| F230 | <82 | 53.0±3.0 | >34 |
| F240 | <70 | 44.5±2.0 | >28 |
| F280 | <59 | 36.5±1.5 | >22 |
| F320 | <49 | 29.2±1.5 | >16.5 |
| F360 | <40 | 22.8±1.5 | >12 |
| F400 | <32 | 17.3±1.0 | >8 |
| F500 | <25 | 12.8±1.0 | >5 |
| F600 | <19 | 9.3±1.0 | >3 |
| F800 | <14 | 6.5±1.0 | >2 |
| F1000 | <10 | 4.5±0.8 | >1 |
| F1200 | <7 | 3.0±0.5 | >1(at 80%) |
| F1500 | <5 | 2.0±0.4 | >0.8(at 80%) |
Silicon carbide black grinding powder properties
- Good oxidation resistance and chemical stability at high temperatures.
- High hardness with Mohs 9.2-9.3. Even at 2000°C, it’s still got high strength.
- Excellent toughness.
- Low thermal conductivity. So it can resistant to thermal shock.
- High purity min SiC content is 98.5%.
- High bulk density.
- Black silicon carbide powder is washed before milling and suspension treated after milling. The particle sieved by water flow. So there are few impurities(such as free silica and free carbon, etc.)
Silicon carbide black grinding powder applications
Stone sandblasting, stone carving
Surface cleaning of stainless steel semiconductor parts.
Sandblasting and grinding of ceramic products and electronic ceramics.
Polishing stone, polishing marble, etc.
Jade, jewelry, grinding, and polishing.
Gem polishing, gem punching.
Glass art polishing and grinding, etc.
Making silicon carbide abrasive tools.
Anticorrosive mastic and coating.
Wear resistance material for brakes.
Composite ceramic toughening material.
Modified resin additives.
Repair materials for desulfurization tower of the power plant.
Silicon carbide black grinding powder production
Silicon carbide black grinding powder Product Qualification
ISO 9001:2015 Certificate
TUV certificate
Silicon carbide black grinding powder Packing
- 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 manufacturing. We began to produce silicon carbide material in 1999.
Q: What grade of silicon carbide do you have?
A: Expect metallurgical black silicon carbide, the silicon carbide from us are all of A grade quality.
Q: How will you check silicon carbide quality before delivery?
A: We will check the chemical content, cleanness of the SiC grain and powder. And inspect the gradation, bulk density of SiC grain and powder.
Q: Do you support the third party quality test?
A: Yes, we are open to getting a third party quality test before delivery.
Q: Are the silicon carbide material from you is reclaimed material?
A: No. We only produce A-grade silicon carbide produced from high-quality melted SiC blocks.
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. The customer only needs to bear the logistic cost.
Q: What is the lead time for each order?
A: It depends on the quantity required. Generally, 5-10 days for FCL(20-25MT).
Q: What is your annual capacity？
A: Our capacity is 1800-2000MT per month, annually appr. 22000 MT.
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