Product Introduction of Silicon Nitride Ceramic Wheels:
Silicon nitride (Si₃N₄) ceramic wheels are high-performance industrial ceramic products with the following significant characteristics:
1. High hardness and wear resistance: Vickers hardness reaches 1600-1800 HV, second only to a few superhard materials, effectively resisting scratches and abrasive wear.
2. Excellent thermal stability: Long-term operating temperature can reach over 1200℃, with a low thermal expansion coefficient (3.1-3.2×10⁻⁶/K), maintaining good dimensional stability under temperature changes.
3. High mechanical strength: Bending strength of 800-1200 MPa, fracture toughness of 6-8 MPa·m¹/², able to withstand considerable mechanical stress.
4. Chemical stability: Strong resistance to most acid and alkali solutions, suitable for corrosive environments.
5. Low density and lightweight: Density is approximately 3.2 g/cm³, only 40% of steel, reducing equipment weight.
6. Electrical insulation: Resistivity of 10¹⁴-10¹⁶ Ω·cm, dielectric strength up to 20 kV/mm.
Application areas
Application areas | Application Scenarios | Advantages demonstrated |
Precision machinery | High-precision bearings, cutting tools, measuring wheels | High precision, long lifespan, low wear and tear. |
Electronic semiconductors | Semiconductor manufacturing equipment, electronic packaging | Insulating properties, thermal stability, chemical inertness |
Aerospace | Engine components, structural components | High temperature resistance, lightweight, high strength |
Chemical Engineering and Metallurgy | Transmission components for corrosive environments | Chemical resistant and wear-resistant |
Performance parameter comparison
Performance indicators | Value/Characteristic | Reference material (aluminum oxide) |
hardness | HRA 92-94, 15-17 GPa | Higher than alumina |
Flexural strength | 800-1200 MPa | It is 2-3 times that of aluminum oxide. |
density | 3.2 g/cm³ | 15% lower than aluminum oxide. |
Thermal conductivity | 20-35 W/(m·K) | Superior to aluminum oxide |
fracture toughness | 6-8 MPa·m¹/² | It is twice that of aluminum oxide. |
Supports custom specifications.
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