Silicon nitride ceramic rotary bearings
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材料及含量
产品特点
1. High Hardness and Wear Resistance: Vickers hardness ≥1500HV, 2-3 times that of bearing steel, significantly reducing wear.
2. Low Density: Density is only 3.20 g/cm³ (approximately 40% of steel), reducing centrifugal force during high-speed rotation.
3. High Temperature Resistance: Maintains stable performance in high-temperature environments up to 800℃, with some products resistant to temperatures up to 1200℃.
4. Corrosion Resistance: Strong resistance to corrosive media such as acids, alkalis, and salts.
5. Electrical Insulation: Suitable for electrical equipment to prevent electrolytic corrosion.
6. Self-Lubricating: Low friction coefficient of 0.1-0.2, allowing use in environments without lubricating media.
7. Long Lifespan: Service life is 3-5 times that of all-steel bearings.
产品详情
Product Introduction of Silicon Nitride Ceramic Rotary Bearings:
Silicon nitride ceramic rotary bearings are high-performance bearings that use silicon nitride (Si₃N₄) ceramic material as the rolling elements, usually combined with metal rings (bearing steel or stainless steel) to form a hybrid ceramic bearing structure. This type of bearing combines the excellent properties of ceramic materials with the strength of metal structures, exhibiting superior performance under extreme operating conditions.
Technical Parameters
Hardness: ≥1500 HV.
Density: 3.20 g/cm³.
Temperature Resistance: 800℃ (stable).
Rotational Accuracy: ±0.01 mm.
Noise: ≤40 dB.
Flexural Strength: >900 MPa.
Fracture Toughness: ≥6 MPa·m¹/².
Application Fields
1. Aerospace: Aircraft engine bearings, requiring high temperature resistance and lightweight design.
2. Precision Machine Tools: High-speed spindle bearings (up to 80,000 rpm).
3. New Energy Vehicles: Motor bearings, improving efficiency and extending lifespan.
4. Wind Power Generation: Insulated bearings to prevent electrical corrosion.
5. Semiconductor Equipment: High cleanliness and corrosion-resistant environments.
6. Medical Devices: Precision equipment such as high-speed centrifuges.
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