Product Name: Fine-structured Alumina Ceramic Bushing
Product material: High-purity alumina (Al₂O₃), common purities are 95%, 99%, and 99.5%.
Material properties: high hardness, excellent wear resistance, good electrical insulation, high temperature resistance, corrosion resistance, and low friction coefficient.
Application fields: Precision bearings, pump and valve seals, transmission components, insulating bushings, rotating parts of automation equipment.
Application industries: Semiconductor equipment, medical equipment, automation and robotics, chemical pumps and valves, textile machinery, new energy vehicles.
Processing difficulties: The hardness is high after sintering, making it prone to chipping during fine processing; strict control is required for dimensional accuracy and positional tolerance.
Processing flow: Powder processing → Spray granulation → Forming (dry pressing/CIP) → High-temperature sintering → CNC precision machining → Inspection → Ultrasonic cleaning → Packaging
Delivery time: 45-60 days for standard specifications, depending on the complexity of the technical requirements.
Alumina Ceramic Bearing Sleeves are advanced ceramic structural components manufactured from high-purity alumina powder through modern powder metallurgy processes and precision machining technologies. Leveraging the inherent superior material properties of alumina ceramics, they effectively replace traditional materials like metals and plastics in harsh operating conditions and precision transmission applications, significantly enhancing equipment reliability, efficiency, and service life.
Core Performance Advantages:
Exceptional Wear Resistance: High hardness (Rockwell Hardness HRA80-90), second only to diamond, effectively resists abrasive and adhesive wear, resulting in a service life far exceeding that of metal sleeves.
Excellent Electrical Insulation: High electrical resistivity allows for reliable operation in high-voltage and high-frequency environments, ensuring insulation safety.
High-Temperature Resistance & Corrosion Resistance: Can operate long-term in high-temperature environments up to 1600°C and is resistant to acids, alkalis, and various organic solvents, making it suitable for demanding chemical environments.
Low Friction Coefficient: Ensures smooth operation, reduces power loss, and can enable oil-free self-lubrication in certain applications.
High Rigidity & Stability: High modulus of elasticity minimizes deformation, and the low thermal expansion coefficient ensures dimensional stability under temperature fluctuations.
