Historically, alumina has been the most popular and economical engineering ceramic. It combines several desirable qualities, including
- Good hardness
- Excellent wear resistance
- High strengthand stiffness
- Good thermal stability
- Nearly chemical inertness
Material Details:
With excellent performance, aluminum oxide ceramic (Al2O3 material) is chemically inert and can be applied to nearly any mechanical seal.
JUNTY, the dedicated mechanical seal manufacturer, can provide high-quality and good wear-resistance mechanical seal parts made of aluminum oxide ceramic. In addition, the Al2O3 material can be manufactured in purity ranges from 95% to 99.5% (available in ivory color) according to the diverse needs of the mechanical seal.
| Parameter | Unit | J6995 (99.5% Al2O3) | J6990 (99% Al2O3) |
| Density | g/cm3 | 3.9 | 3.88 |
| Hardness | Rockwell | HRA 86 | HRA 85 |
| Compressive Strength | Mpa | 2100 | 2000 |
| psi | 304,500 | 290,000 | |
| Flexural Strength | Mpa | 350 | 310 |
| psi | 51,000 | 45,000 | |
| Elastic Modulous | Gpa | 360 | 330 |
| psi | 52×106 | 48x106 | |
| Thermal Conductivity | W/(m.K) | 29 | 26 |
| Coefficient of Thermal Expansion | 1×10-6/K | 8.2 | 8.2
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