Product Name: Precision Zirconia ($ZrO_2$) Hollow Sleeve / Bushing
Product Material: Yttria-Stabilized Tetragonal Zirconia (Y-TZP), Magnesia-Stabilized Zirconia (Mg-PSZ).
Material Characteristics: Superior fracture toughness (prevents chipping), Extreme hardness and wear resistance, Thermal expansion matching stainless steel, Low thermal conductivity, Outstanding chemical resistance (acid/alkali), Non-magnetic and non-conductive, Mirror-finish polishing capability.
Application Fields: Fiber optic alignment sleeves, Precision plunger pump liners, High-speed motor shaft sleeves, Liquid dispensing valves, Homogenizer chamber inserts, Thermal insulating spacers, High-pressure fluid seals.
Application Industries: Biomedical (Surgical and dental tools), Advanced Machinery (Heavy-duty precision components), New Energy (Lithium battery slurry processing), Fluid Control (High-pressure metering), Electronic Engineering (Non-magnetic locating pins), Aerospace (High-strength fasteners), Petrochemical (Downhole sensors), Broad Semiconductor (Wafer handling).
Processing Difficulties: Achieving micron-level concentricity between the inner diameter (ID) and outer diameter (OD), Maintaining ultra-tight wall thickness tolerances, Achieving a mirror-polished ID ($Ra < 0.05\mu m$) to reduce internal friction, Controlling phase stability during high-precision diamond grinding.
Processing Flow: Nano-powder preparation → Isostatic Pressing (CIP) or Ceramic Injection Molding (CIM) → High-temperature sintering → Diamond internal/external cylindrical grinding → Precision honing of the hollow core → Mirror polishing → 100% dimensional and crack inspection → Secure packaging.
Delivery Period: Standard specifications: 15-25 days, Customized ultra-thin or high-precision sleeves: 30-50 days.
The Zirconia Hollow Sleeve is a high-toughness alternative to traditional alumina sleeves, specifically engineered for high-impact and high-stress environments. Known for its metal-like thermal expansion, it can be shrink-fitted or press-fitted into steel housings without the risk of cracking common in other ceramics. The hollow core is finished to a mirror-like smoothness, providing a perfect guiding surface for plungers or shafts with minimal friction and zero particle shedding. These sleeves are ideal for pharmaceutical, chemical, and precision engineering applications where reliability and clean-room performance are non-negotiable.
Key Features:
"Ceramic Steel" Toughness: Highest resistance to crack propagation among all oxide ceramics.
Tight Tolerance Matching: Achieves sub-micron precision for perfect integration with rotating or reciprocating shafts.
Corrosion & Erosion Proof: Maintains internal surface integrity even when handling abrasive or corrosive fluids.
Thermal Compatibility: Expands and contracts similarly to steel, ensuring stability in fluctuating temperatures.
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