Aluminium oxide has firmly established itself as a technical ceramic. This development is driven by the increasing miniaturisation of components, which calls for a material with modifiable property and machining profiles. The property profile of aluminium oxide gives it multifunctional applications. Consequently, aluminium oxide is very hard, extremely resistant to wear and corrosion.
Aluminium oxide is the oxygen compound of the element aluminium. The raw material for this substance is the aluminium ore bauxite. Caustic soda lye is used to split this ore into aluminium hydroxide. Calcination and complex grinding processes are used to create high-quality, high-purity AI2O3.
The aluminium oxide used in our products offers excellent corrosion resistance and high dielectric strength, which explains its frequent use as an insulator.
Aluminium oxide is also extremely hard and highly resistant to abrasion and wear. In comparison with other ceramics, this material is an excellent heat conductor.
DOCERAM Bezeichnung DOCERAM Type |
Unit | A-132 | A-141 | Z-141 | Cerazur | Volcera 141 | EvoCera |
Material Material |
- | AI2O3 >99,7% |
AI2O3 >99,99% |
ZrO2 Y-PSZ | ZrO2 Y-PSZ | Si3N4 | - |
Farbe Colour |
- | elfenbein ivory |
hellrosa pink |
weiß white |
blau blue |
grau, schwarz grey, black |
- |
Dichte Density |
(g/cm3) | 3.9 | 3.9 | >6.04 | 6 | 3.2 | 5.9 |
Biegefestigkeit Flexural Strength |
(MPa) | 390 | 390 | 1200 | 1300 | 1000 | 400 |
Druckfestigkeit Compressive Strength |
(MPa) | 3900 | 3900 | 3000 | 3000 | 2500 | 3000 |
E-Modul Modulus of Elasticity |
(GPa) | 390 | 390 | 205 | 205 | 320 | 218 |
Bruchzähigkeit Fracture Toughness |
(MPa√m) | 5.2 | 5.2 | 8 | 12 | 6.4 | - |
Weibull Modul Weibull Modulus |
- | 12 | 12 | 12 | 25 | 14 | 50 |
Vickers Härte Vickers Hardness |
(HV 0.5) | 2000 | 2000 | 1300 | 1150 | 1650 | 1047 |
Wärmeausdehnung Thermal Expansion Coefficient |
(10 -6K-1) | 5.5-8.4 | 5.5-8.4 | 10 | 10 | 3.4 | 11.1 |
Wärmeleitfähigkeit Thermal Conductivity |
(W/mK) | 28 | 28 | <2 | <2 | 22 | 3.55 |
Temp. Wechselbeständigkeit Thermal-Shock Resistance |
(ΔT°C) | 120 | 180 | 290 | 280 | 830 | - |
Maximale Einsatztemperatur Maximum Operating Temperature |
(°C) | 1700 | 1700 | 1000 | 1000 | 1200 | - |
Spez. Widerstand bei 20°C Volume Resistivity at 20°C |
(Ω cm) | > 1017 | > 1015 | > 1010 | > 1010 | > 1011 | - |
Durchschlagsfestigkeit Dielectric Strength |
(kV/mm) | 22 | 30 | - | - | 20 | - |
The values listed were determined on standard test specimens. The material properties may deviate from these values depending on the applications and component geometry. Please contact us for precise clarification of the material suitability. Other technical data on request. Subject to technical modifications and errors. 2014 edition.
Sample Solutions
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