Exceptional Hardness & Mechanical Strength
Mohs hardness of ~9.5, second only to diamond and boron nitride.
High wear resistance, making it ideal for abrasive applications (e.g., grinding wheels, cutting tools).
Maintains mechanical stability even under extreme stress.
Wide Bandgap Semiconductor Properties
Bandgap of 3.26 eV (4H-SiC), significantly larger than silicon (1.12 eV).
Enables operation at higher voltages, temperatures, and frequencies.
Reduces energy losses in power electronics.
High critical electric field strength (10x that of silicon), allowing thinner, more efficient device designs.
Outstanding Thermal Properties
High thermal conductivity (~490 W/m·K for 4H-SiC at room temperature), surpassing most metals and semiconductors.
Excellent heat dissipation, crucial for power electronics and high-frequency devices.
Thermal stability up to 1,600°C (melting point ~2,700°C), suitable for extreme environments (e.g., aerospace, nuclear reactors).
Key Advantages vs. Traditional Materials
| Property | Silicon Carbide (SiC) | Silicon (Si) | Gallium Nitride (GaN) |
|---|---|---|---|
| Bandgap (eV) | 3.26 | 1.12 | 3.4 |
| Thermal Conductivity | High (~490 W/m·K) | Low (~150 W/m·K) | Moderate (~253 W/m·K) |
| Max Operating Temp. | ~600°C+ | ~150°C | ~300°C |
| Electric Field Strength | 10x Si | Baseline | ~3x Si |
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