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Hardness HRA90-92 Alumina Ceramic Ring

Categories Alumina Ceramic
Place of Origin: Made In China,Zhejiang,Jinhua
Brand Name: Dayoo
MOQ: Negotiate
Price: Negotiate
Delivery Time: Negotiable
Payment Terms: Negotiable
Transparency: Opaque
Dielectric Strength: 15 kV/mm
Materials: 92% Alumina Powder
Type: ceramic ball
Material: Alumina Ceramic
Elastic Modulus: 380 GPa
Shape: Cylinder
Surface Finish: Fine
Melting Point: 2,072°C
Precision Tolerance: High
Compressive Strength: 2000 MPa
Machinability: Difficult
Application: Industrial Ceramic
Alumina Content: 92% & 95%
Packaging Details: Carton
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Hardness HRA90-92 Alumina Ceramic Ring

Hardness HRA90-92 Alumina Ceramic Ring


[Product Introduction]

This high-precision alumina ceramic ring component (purity ≥95%) is manufactured using isostatic pressing technology, featuring an ivory-white porcelain luster with a precision structure consisting of an annular body and symmetrically distributed grooves. Sintered at 1600°C, the product achieves a density of 3.85g/cm³ with surface roughness Ra≤0.4μm. Rounded edge treatment ensures installation safety, making it suitable for core transmission systems in automation equipment.

[Core Applications]

  1. Precision Machinery: High-speed motor bearing retainers, servo system positioning rings
  2. Electronic Semiconductors: IC test fixture insulation bases, wafer carrier positioning components
  3. New Energy Sector: Lithium battery pole piece cutting dies, hydrogen fuel cell bipolar plate frames
  4. Medical Devices: Minimally invasive surgical instrument guide sleeves, dental implant abutment connectors

[Performance Advantages]

✅ Physical Properties: Hardness HRA90-92 (sapphire-comparable), flexural strength ≥350MPa
✅ Temperature Resistance: Operating range -200°C~1600°C, thermal expansion coefficient 6.8×10⁻⁶/°C
✅ Chemical Stability: Resistant to strong acids/alkalis (except hydrofluoric acid), insulation resistance >10¹⁴Ω
✅ Precision Control: Dimensional tolerance ±0.01mm, geometric tolerance ≤0.02mm

[Specification Parameter Table]

Parameter ItemIndex ValueTest Standard
Outer Diameterφ55±0.02mmGB/T 2848-2015
Inner Diameterφ25±0.01mmGB/T 2848-2015
Thickness10±0.01mmGB/T 2848-2015
Groove Quantity6 sets symmetricCustom Drawing
Surface FinishRa0.4μmGB/T 1031-2009
Compressive Strength≥3000MPaGB/T 4740-1999

[Production Process]

Raw material proportioning → Ball milling → Spray granulation → Isostatic pressing → Degreasing → High-temperature sintering → CNC precision machining → Ultrasonic cleaning → Laser inspection → Vacuum packaging

[Usage Instructions]

  1. Use dedicated ceramic clamping tools during installation to prevent impact damage
  2. Control temperature changes to ≤5℃/min in working environment
  3. Clean with anhydrous ethanol ultrasonic cleaning (power ≤40kHz)
  4. Avoid storage with metal hard objects; use anti-static packaging

[After-Sales Service]

✓ 7-day no-reason return policy (unopened products)
✓ Free replacement for non-human damage within 1-year warranty
✓ Customization service available (MOQ 50 pieces)
✓ Third-party material testing reports (SGS/CTI optional)

[FAQ]

Q: Does the product support high-temperature sterilization?
A: Withstands 134℃ autoclave sterilization (complies with ISO 17665 standard)

Q: Is RoHS certification available?
A: Full product range passes RoHS 2.0 ten-item testing (Report No.: ENV20230615012)


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