High Strength 99 Alumina Ceramic Ring for Wear Resistance

﹡Product Overview

Our 99% pure alumina (Al₂O₃) ceramic rings are engineered for extreme wear resistance, chemical stability, and high-temperature performance. Ideal for sealing, bearing, and insulation applications in demanding industrial environments.

﹡Key Technical Specifications

✅ Material Grade: 99% Alumina – <50ppm metallic impurities

✅ Density: 3.9 g/cm³ – Near-zero porosity (<0.1%)

✅ Hardness: 1,500 HV (Mohs 9) – 3× harder than tool steel

✅ Flexural Strength: 380-420 MPa

✅ Compressive Strength: 2,500-3,000 MPa

✅ Thermal Properties:

Max Operating Temp: 1,600°C (2,912°F)

Thermal Conductivity: 28-32 W/(m·K)

Thermal Shock Resistance: ΔT >500°C

✅ Surface Finish Options:

Standard: Ra 0.4µm (±0.05µm)

Precision Ground: Ra 0.1µm

Mirror Polished: Ra <0.05µm

✅ Standard Dimensions:

OD: 5-300mm (±0.02mm tolerance)

ID: 3-290mm

Thickness: 1-50mm

﹡Industry Applications

1. Mechanical Sealing Systems

Pump seal faces – Withstand 50m/s sliding speeds

Valve seat rings – Zero corrosion in chemical media

2. Semiconductor Equipment

Plasma chamber insulators – Non-contaminating

Wafer handling rings – ESD protection

3. High-Temperature Processing

Kiln furniture spacers – 1,500°C continuous operation

Thermocouple protection rings – Molten metal resistance

4. Automotive & Aerospace

Turbocharger seal rings – 200,000+ RPM capability

Brake system components – Fade-free performance

5. Medical Technology

Implantable device components – ISO 6474 compliant

Sterilizable surgical tools – Autoclavable

﹡Competitive Advantages

✔ Ultra-Low Wear Rate – <0.01mm/year in abrasive environments

✔ Chemical Immunity – Resists all acids except HF

✔ Cost Efficiency – 10× lifespan vs. metal components

﹡Production process

1. Grind and crush the raw materials to be slurry or powder

2. se-different method to making the slurry or powder into semi-finished products

3. Put the semi-finished products into the kiln for dewaxing and sintering;

4. After forming and sintering, Ceramic Sleeves products can also be processed by subsequent CNC precision machining according to the drawing requirements. Then Q/C test.

5. Finally package Ceramic Sleeves by bubble paper or cartons and place it on tray for delivery

﹡Certifications

﹡Company

Yixing Shengda Refractory Ceramic Co, Ltd. was established in Yixing City, China in 1995, witha production area of over 10,000m2. lt is an enterprise specializing in the production of aluminaceramic,zirconia ceramic,slicon nitride, silicon carbide and other precision ceramic products. 

And we also produce ceramic band heaters, ceramic terminal block, cordierite and mullite ceramic parts an other ceramic products.

﹡Ceramic Properties