Black Silicon Carbide Abrasive (C)
1. High hardness and sharp cutting Black silicon carbide has a Mohs hardness of 9.0-9.3, below diamond and boron carbide, and mechanical strength above alumina. Its sharp, friable grains cut efficiently into material surfaces. 2. Good thermal conductivity and thermal stability Si...
Read the full description- Color
- Black
- Grit size
- F8-F220 for bonded abrasives; P grades and micropowders available on request
- Melting point
- 2250℃ - 2700℃
- Mohs hardness
- 9-9.3 Mohs
Bodan supplies this item to specification. Share the material, machine and required finish and we will confirm the grade, dimensions and packing for your order.
Advantages
Key features
-
High hardness and sharp cutting
Black silicon carbide has a Mohs hardness of 9.0-9.3, below diamond and boron carbide, and mechanical strength above alumina. Its sharp, friable grains cut efficiently into material surfaces.
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Good thermal conductivity and thermal stability
Silicon carbide's thermal conductivity is approximately three times that of silicon, reaching 120-140 W/mK. At 1000℃ in air, surface oxidation forms a protective silica layer. Its low thermal expansion coefficient, approximately 4.4×10⁻⁶/℃ over 25-1400℃, provides good thermal shock resistance.
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Excellent chemical stability
Black silicon carbide is chemically stable and corrosion-resistant. At room temperature it does not react with known acids, making it suitable for demanding conditions.
-
Greater toughness than green silicon carbide
Higher toughness than green silicon carbide limits excessive grain fracture during grinding and extends service life.
-
A complete range for broad applications
The full range, from coarse F8 to micropowder W5 / 3000 grit, covers rough, intermediate and fine grinding and ultra-fine polishing.
Technical data
Specifications
- Color
- Black
- Melting point
- 2250℃ - 2700℃
- Mohs hardness
- 9-9.3 Mohs
- Chemical formula
- SiC
- Particle density
- 3.20 - 3.45 g/cm³
- Smelting process
- High-temperature resistance-furnace smelting (>1800℃)
- Loose bulk density
- 1.20-1.60 g/cm³, depending on grit size
- Grit size
- F8-F220 for bonded abrasives; P grades and micropowders available on request
Product details
About this product
Product Overview
Black silicon carbide, designated C, is a synthetic abrasive produced from quartz sand, petroleum coke or coal coke, and quality silica in a resistance furnace above 1800℃. It has a hexagonal crystal system, a black opaque appearance, and hardness between alumina and diamond. Sharp, friable grains provide electrical and thermal conductivity. Available in F8-F220, it is used in abrasive tools, refractories, blasting and polishing.
Product Parameters
| Specifications | Details |
|---|---|
| Product name | Black Silicon Carbide Abrasive (C) |
| Chemical formula | SiC |
| Smelting process | High-temperature resistance-furnace smelting (>1800℃) |
| Appearance / color | Black |
| Mohs hardness | 9-9.3 Mohs |
| Particle density | 3.20 - 3.45 g/cm³ |
| Bulk density | 1.20-1.60 g/cm³, depending on grit size |
| Melting point | 2250℃ - 2700℃ |
| Grit range | F8-F220 for bonded abrasives; P grades and micropowders available on request |
Core Performance Advantages
1. High hardness and sharp cutting
Black silicon carbide has a Mohs hardness of 9.0-9.3, below diamond and boron carbide, and mechanical strength above alumina. Its sharp, friable grains cut efficiently into material surfaces.
2. Good thermal conductivity and thermal stability
Silicon carbide's thermal conductivity is approximately three times that of silicon, reaching 120-140 W/mK. At 1000℃ in air, surface oxidation forms a protective silica layer. Its low thermal expansion coefficient, approximately 4.4×10⁻⁶/℃ over 25-1400℃, provides good thermal shock resistance.
3. Excellent chemical stability
Black silicon carbide is chemically stable and corrosion-resistant. At room temperature it does not react with known acids, making it suitable for demanding conditions.
4. Greater toughness than green silicon carbide
Higher toughness than green silicon carbide limits excessive grain fracture during grinding and extends service life.
5. A complete range for broad applications
The full range, from coarse F8 to micropowder W5 / 3000 grit, covers rough, intermediate and fine grinding and ultra-fine polishing.
Applicable Materials
Cast iron and gray cast iron
Non-ferrous metals, including copper, aluminum and their alloys
Stone, glass, ceramics and other non-metals
Rubber, leather, plastics and wood
Refractories and wear-resistant floors
Main Applications
Application areas and specific uses
Abrasive tools: vitrified and resin wheels, honing stones, mounted points, sandpaper and abrasive cloth
Blasting and polishing: surface blasting, etching and polishing of metals and non-metals
Refractories: premium refractory products, specialty ceramics and ceramic foams
Metallurgy: steelmaking deoxidizer to improve steel quality
Electronics: grinding and polishing monocrystalline and polycrystalline silicon for photovoltaic products
Coatings and plastics: additives to improve wear resistance
Product Specifications
Typical F-grit specifications for bonded abrasives are listed below:
| Grit designation | Bulk density (g/cm³) |
|---|---|
| F24 | 1.59-1.63 |
| F36 | 1.58-1.60 |
| F46 | 1.58-1.62 |
| F60 | 1.55-1.60 |
| F80 | 1.50-1.55 |
| F100 | 1.50-1.55 |
| F120 | 1.46-1.52 |
| F150 | 1.48-1.51 |
| F180 | 1.42-1.48 |
| F220 | -- |
Reference Chemical Composition (Typical Values)
| Component | Content (%) |
|---|---|
| SiC | ≥ 98.0 |
| Fe2O3 | ≤ 0.3 |
| Free carbon (F.C) | ≤ 0.3 |
| Magnetic material | ≤ 0.02 |
Packaging
Common packaging options include:
Standard: 25 kg woven bags with liners
Bulk: 25 kg bags packed inside a bulk bag
Pallets: 25 kg bags on pallets, optionally secured with stretch film
Custom: special packaging on request
Storage Recommendations
Store in a cool, dry, ventilated place away from moisture.
Do not store together with corrosive substances such as acids and alkalis.
Keep stacking height appropriate to prevent packaging damage.
For long-term storage, use sealed packaging to keep out dust and moisture.
Contact us for samples, technical support or customized solutions.
Inquiry
Request a quote.
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