Product Name: Precision Alumina (Al_2O_3) Ceramic Sleeve / Bushing
Product Material: 95% - 99.8% High-Purity Alumina ($Al_2O_3$), optional Zirconia Toughened Alumina (ZTA).
Material Characteristics: Superior hardness and wear resistance, Exceptional compressive strength, Excellent electrical insulation, Chemically inert to most acids and alkalis, High thermal stability (up to 1750°C), Low friction coefficient when polished.
Application Fields: Centrifugal pump shaft sleeves, Protective liners for corrosive fluid pipes, High-voltage insulating bushings, Plunger pump cylinders, Mechanical seal rings, Wear-resistant bushings for agitators.
Application Industries: Biomedical (Sterile fluid handling), Advanced Machinery (High-speed rotating shafts), New Energy (Lithium battery slurry transport), Fluid Control (Precision valves), Electronic Engineering (Insulating sleeves), Aerospace (Sensor protection), Petrochemical (Corrosive fluid pumping), Broad Semiconductor (Etching equipment components).
Processing Difficulties: Maintaining high concentricity between internal (ID) and external (OD) diameters, Achieving micron-level wall thickness consistency, Preventing edge chipping during internal diamond honing, Managing sintering deformation in extra-long or thin-walled sleeves.
Processing Flow: Raw material preparation → Isostatic pressing (CIP) or Extrusion → Green body machining → High-temperature sintering → Diamond internal/external cylindrical grinding → Mirror honing (ID) → Ultrasonic cleaning → Precision measurement (CMM) → Secure packaging.
Delivery Period: Standard sizes: 14-25 days, Customized high-precision or thin-walled sleeves: 30-45 days.
The Alumina Ceramic Sleeve is a high-durability solution designed to replace metal bushings in environments prone to abrasion and corrosion. Engineered from high-purity alumina, these sleeves provide an ultra-hard protective layer that prevents shaft scoring and extends the life of mechanical seals. Their superior thermal and chemical stability ensures they remain dimensionally accurate under extreme operating conditions. Whether used as a wear-resistant liner in a chemical pump or an insulating bushing in a high-voltage assembly, our alumina sleeves provide a maintenance-free, long-life performance that exceeds traditional alloys and polymers.
Key Features
Extended Wear Life: Harder than most metals, effectively resisting abrasive particles in fluid streams.
Corrosion Immunity: Will not rust or degrade when exposed to aggressive industrial chemicals or seawater.
High Dielectric Strength: Provides reliable electrical isolation in high-voltage and high-frequency applications.
Low Friction Finish: Precision-honed internal diameters reduce energy loss and heat generation.
Dimensional Stability: Zero creep and minimal thermal expansion ensure a constant fit over time.
