Alumina ceramic, also called Al2O3 ceramic, is one of the most practical materials for custom technical ceramic parts. It is hard, insulating, temperature resistant and suitable for many drawing-based components.
Material Property Comparison
| Material | Hardness | Fracture toughness | Flexural strength | Max use temperature | Thermal conductivity | Electrical insulation | Relative cost |
|---|---|---|---|---|---|---|---|
| 95%-99% alumina (Al2O3) | 12-20 GPa | 3-5 MPa m^0.5 | 300-450 MPa | 1500-1700 C | 20-35 W/m K | Excellent | Low to medium |
| 99.5%-99.7% alumina | 16-20 GPa | 3-4 MPa m^0.5 | 300-400 MPa | 1600-1700 C | 25-35 W/m K | Excellent | Medium |
| Y-TZP zirconia (ZrO2) | 11-13 GPa | 6-10 MPa m^0.5 | 800-1200 MPa | 900-1100 C | 2-3 W/m K | Good at room temperature | Medium to high |
Typical values for comparison — request a datasheet for guaranteed specifications.
Alumina Ceramic Wear Parts
For wear applications, alumina can be made into guide pins, rods, sleeves, washers, plungers, rings and sliding contact parts. Final grinding or polishing can be used for critical surfaces.
Alumina Ceramic Insulation Parts
Alumina is also selected for electrical insulation, high-voltage spacing and furnace-related parts. Typical shapes include tubes, spacers, washers, sleeves, plates and custom insulators.
Typical Custom Shapes
- Alumina rods, shafts, pins and plungers.
- Alumina tubes, insulating sleeves and spacers.
- Alumina ceramic rings, washers and bushings.
- Custom ceramic fixtures, plates and support parts.
Design and Cost Factors
Cost depends on size, shape, tolerance, surface finish, forming method and quantity. Mark only truly critical dimensions as tight tolerance. Chamfers and reasonable wall thickness can improve yield and reduce chipping.
Related Pages
FAQ
Why is alumina ceramic used for wear and insulation?
Alumina offers high hardness, electrical insulation, heat resistance and chemical stability at a practical cost, making it suitable for many custom industrial parts.
Which alumina purity should I choose?
95% alumina is often suitable for cost-effective industrial parts, while higher purity alumina may be selected for higher temperature, cleaner surfaces or more demanding insulation needs.
Can alumina ceramic parts be made from drawings?
Yes. HERUN can manufacture custom alumina rods, tubes, rings, washers, sleeves, spacers and plates from drawings or sample photos.