Black silicon carbide
Extreme Hardness for Cast Iron, Stone, Glass & High-Temp Refractories
EXTREME HARDNESS : Mohs 9.15 – 9.2. Harder than Alumina.
SHARP & BRITTLE : Aggressive cutting action on brittle materials.
HIGH PURITY : SiC Content ≥ 98% (Abrasive Grade).
THERMAL CONDUCTIVITY : Excellent thermal shock resistance for refractories.
- FEPA Standards: Macrogrits (F12-F220) for heavy-duty abrasives; Microgrits (F230-F2000) for precision work; P-series for coated applications.
- JIS Standards: #240-#3000 for fine powders in electronics and lapping.
- ANSI & Custom: Compliant with ANSI B74.12; available in metric aggregates (e.g., 0-1mm, 1-3mm) and tailored distributions for optimal flow and bonding.
- Available Sizes: Standard grits include 16, 20, 100, 120, up to ultra-fine; custom particle sizing for specific density and surface area requirements.
TECHNICAL SPECIFICATIONS
Chemical Composition
- SiC: 97-99%
- Free Carbon (C): ≤0.3%
- SiO₂: ≤1%
- Free Silicon (Si): ≤0.8%
- Fe₂O₃: ≤0.3%
- Al: ≤0.3%
- Magnetic Content: ≤0.02%
Physical Properties
- High Hardness and Abrasion Resistance: Ranks just below diamond, enabling precise material removal without excessive wear on tools.
- Thermal Stability: Maintains strength up to 1600°C, with no melting under normal pressures—ideal for refractory linings where thermal shock could cause failures.
- Low Thermal Expansion: Minimizes cracking in temperature-fluctuating applications, enhancing structural integrity.
- High Thermal Conductivity: Promotes efficient heat dissipation, reducing hotspots in kilns and furnaces.
| Property | Typical Value | Standard/Reference |
|---|---|---|
| SiC Purity | 97-99% (up to 98.6% for microgrits) | ANSI B74.15 |
| Hardness (Mohs) | 9.0-9.5 | Mohs Scale |
| Hardness (Knoop) | 2450-2550 | Knoop (100g) |
| True Density | 3.21 g/cm³ | – |
| Bulk Density | 1.2-1.6 g/cm³ | ANSI B74.4 |
| Melting Point | Dissociates at ~2500-2700°C | – |
| Thermal Conductivity | 100-130 W/m·K | – |
| Coefficient of Thermal Expansion | 4.0 × 10⁻⁶ /°C | – |
| Modulus of Elasticity | 410 GPa | – |
| Color | Black/Greyish | – |
| Particle Shape | Sharp, Angular, Friable | – |
Application areas
Grinding Cast Iron
Stone & Glass Processing
Refractory Kiln Furniture
Metallurgical Deoxidizer
- Handling: Use protective gear (gloves, masks, eyewear) to avoid inhalation of dust. Store in dry, ventilated areas.
- Safety: Non-toxic but abrasive—avoid skin contact. Refer to SDS for detailed guidelines.
- Environmental: Recyclable; dispose per local regulations.
PACKAGING AND LOGISTICS
Standard Packaging: 25kg woven bags, 1-ton jumbo bags, or pallets.
1000kg heavy-duty jumbo bags on ISPM 15 pallets. Efficient for forklift handling and bulk transport.
Secure steel drums for high-purity powders. We offer full OEM private labeling to build your brand.
- Standard: 25 kg multi-layer paper bags or 1000 kg big bags for efficient handling and transport.
- Custom: Available in bulk, supersacks, or specialized containers to suit international shipping needs.
- Compliance: Meets REACH (EU) and other regional regulations for safe global distribution.
Elevate Your Processes Today
Contact us for a tailored quote, free sample, or expert consultation on integrating black silicon carbide into your operations.