Ceramic seal faces have the property of the resistant-high-temperature,resistant-corrosion,resistant-wearing and good sealing and are widely used in spacecraft,machinery,metallurgy,printing and dyeing, foodstuff,pharmaceutical, auto industry and so on.The ceramic is a good material for bullet-proof jackets and body armours.
| 氧化铝（Al2O3）物理性能参数 Ceramic physical property | ||||
| 技术参数 Technical Parameter | 单位Unit | 95%瓷 | 99%瓷 | 99.5%瓷 |
| 氧化铝含量 Content of Al2O3 | % | 95.0 | 99.0 | 99.5 |
| 体积密度 Density | g/cm3 | 3.70 | 3.88 | 3.90 |
| 硬度 Hardness | HRA | 85 | 89 | 90 |
| 显气孔率 Porosity Rate | % | ＜0.2 | ＜0.2 | ＜0.2 |
| 弯曲强度 Flexural Strength | MPa | 280 | 330 | 350 |
| 热膨胀系数 Coefficient of Heat Expansion | 10-6/℃ | 5.5 | 5.3 | 5.2 |
| 导热系数 Thermal Conductivity | W/(M·K) | 27.8 | 26.7 | 26 |