Silicon nitride ceramic bushing
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材料及含量
产品特点
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.
产品详情
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
贸易信息
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