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German Aluminum oxide (Al2O3)
Al2O3 is characterized above all by its extremely high hardness. In addition, Al2O3 very abrasion-resistant and has high thermal conductivity with chemical resistance.
Examples of applications include crucibles for analyses or holders for induction welding. Sensor housings or insulators for ignition systems are just as possible as any other individual application.
Material data sheet
Designations: Al2O3, Aluminum oxide
| Size | Unit | Typical value |
|---|---|---|
| Purity1 | % | 99,9 |
| Density | g / cm3 | 3,98 |
| Strength, 4-point bending test 2 | MPa | 300 - 400 |
| E-modulus | GPa | 380 |
| Vickers hardness HV | GPa | 17 - 23 |
| Thermal conductivity | W / m K | 30 |
| Coefficient of thermal expansion | ppm / K | 7 - 8 |
| Specific electrical resistance, 20 °C | Ohm m | 1012 - 1015 |
| Dielectric strength | kV / mm | >25 |
| Maximum application temperature | °C | 1900 |
1contains 0.05 % MgO as a grain growth inhibitor, MgO is not considered an impurity
2Material strength data are statistical values. Please contact us to obtain the desired parameters.
Design features
| Feature | Unit | Value |
|---|---|---|
| Component dimensions, max. | mm | 74 x 41 x 80 |
| Wall thickness | mm | 0,3 - 10 |
| Diameter of holes and channels, min.1 | mm | 0,5 - 1 |
1Smaller drill holes possible through reworking