Silicon Carbide (SiC)
The ultimate ceramic material — exceptional hardness, thermal conductivity, and chemical resistance for demanding industrial applications
What is Silicon Carbide?
Silicon Carbide (SiC) is a synthetic crystalline compound of silicon and carbon, renowned as one of the hardest materials available — approaching diamond in hardness. It exhibits exceptional thermal conductivity, low thermal expansion, and outstanding resistance to oxidation and chemical attack.
Available in black and green variants, SiC is indispensable in refractories, abrasives, ceramics, and advanced semiconductor applications.
Technical Specifications
Premium Silicon Carbide with consistent purity and particle size distribution
| Property | Black SiC | Green SiC |
|---|---|---|
| SiC Purity | 97% - 98.5% | 98.5% - 99.5% |
| Hardness (Mohs) | 9.2 - 9.5 | |
| Bulk Density | 3.2 - 3.25 g/cm³ | |
| Melting Point | ~2730°C (decomposes) | |
| Thermal Conductivity | 120 - 170 W/m·K | |
| Grain Size | Typical Applications |
|---|---|
| 8 - 60 mesh | Refractory bricks, kiln furniture, heavy abrasives |
| 80 - 240 mesh | Grinding wheels, coated abrasives, blasting media |
| 240 - 1200 mesh | Fine polishing, lapping compounds |
| Micro Grits (F230-F2000) | Precision finishing, ceramic membranes |
Ultra-High Hardness
Mohs 9.5 — second only to diamond, ideal for cutting and grinding
Extreme Temperature Resistance
Maintains strength above 2500°C in inert atmospheres
High Thermal Conductivity
Excellent heat dissipation for thermal management applications
Chemical Inertness
Resistant to acids, alkalis, and molten metals
Key Applications
Refractories
Kiln furniture, crucibles, burner nozzles, slide gate plates
Abrasives
Grinding wheels, sandpaper, abrasive powders
Steel Industry
Ladle linings, tundish nozzles, blast furnace linings
Semiconductors
Power electronics, high-temperature devices
Automotive
Brake discs, ceramic clutches, wear components
Ceramics & Coatings
Armor, wear-resistant coatings, ceramic membranes
Black vs. Green Silicon Carbide
Black Silicon Carbide: Standard grade with 97-98.5% purity. Excellent for general abrasive and refractory applications. Higher toughness makes it ideal for grinding wheels and heavy-duty applications.
Green Silicon Carbide: Ultra-high purity (98.5%+). Finer crystal structure provides superior hardness and sharper cutting edges. Preferred for precision grinding, semiconductor applications, and high-performance refractories.
Request Silicon Carbide Samples
Available in both Black and Green variants, all standard grain sizes from 8 mesh to micro grits.