
Alumina ceramics feature:
Good mechanical strength
Good heat conductivity and fire resistance
Good corrosion and wear resistance
Very good electric insulation
The alumina substrates also possess several unique features:
> Good surface with high smoothness/flatness and less porosity
> High resistance to heat shock
> Low warpage and camber
> Stable in very high temperature and corrosive chemical
> Very stable breaking strength and shape/dimension variance
Industrial Ceramic Structure Parts Applications:
1.Automotive
2.Petro-chemical
3.Fluid control
4.Material transfer
5.Industry
6.Electrical and electronic
7.Semiconductor
8.Sapphire is single-crystal alumina.
Alumina Ceramics Properties | |||
Unit | 95% | 99% | |
Density | g/cm3 | 3.6 | 3.8 |
Water absorption | % | <0.4 | <0.2 |
Firing temperature | °C | 1600 | 1800 |
Hardness | HRA | 70 | 80 |
Coefficientoflinearexpansion | *10-6/°C | 5.5 | 5.3 |
Dielectric constant | 9 | 10.5 | |
Volume resistivity | Ω·cm | - | 1013 |
Breakdownvoltage | KV/mm | 14 | 15 |
Breaking strength | Mpa | 250 | 300 |






















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