Flexural strength: 600-800 MPa.
Compressive strength: 3447 MPa.
Vickers hardness: 1480-1560 HV.
Coefficient of thermal expansion: 3.0-3.5 × 10⁻⁶/℃ (room temperature - 1000℃).
Thermal conductivity: 20-25 W/(m·K).
Fracture toughness: 6-8 MPa·m¹/²
Product Introduction of Silicon Nitride Ceramic Bushings
Silicon nitride ceramic bushings are high-performance ceramic materials made from silicon nitride (Si₃N₄), possessing excellent high-temperature resistance, corrosion resistance, and wear resistance. Their microstructure consists of interwoven elongated β-Si₃N₄ grains, which gives the material extremely high strength and toughness.
Main Features and Advantages
1. High Temperature Resistance:
Stable operation in air up to 1200℃, and up to 1400℃ under protective atmosphere.
Short-term temperature resistance up to 1800℃.
2. Mechanical Properties:
Vickers hardness reaches 1480-1560 HV.
Bending strength is 600-800 MPa.
Compressive strength reaches 3447 MPa.
3. Thermal Characteristics:
Coefficient of thermal expansion is only 3.0-3.5×10⁻⁶/℃.
Thermal conductivity is 20-25 W/(m·K).
Can withstand rapid temperature changes from 1000℃ to cold water.
4. Chemical Stability:
Extremely strong resistance to most acids, bases, and corrosive media.
Only slowly corrodes in hydrofluoric acid (HF).
5. Self-lubricating Properties:
Low coefficient of friction (0.02-0.1).
Wear rate is only 1/10 of traditional metal materials.
Application areas
Application areas | Application Scenarios | Advantages demonstrated |
Aerospace | Aircraft engine turbine bearings | Withstands gas impact at high temperatures of 1500℃. |
auto industry | New energy vehicle motor bearings | Operating temperature above 200℃, weight reduction of 30%. |
Industrial equipment | Heavy-duty machinery wear-resistant parts | The service life is extended by more than 5 times. |
Energy sector | Wind power generation equipment | Reduce friction losses and improve efficiency. |
semiconductor | wafer carrier | The insulation and temperature resistance properties are adapted to the process requirements. |
Supports custom specifications.
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