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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 for splitting 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.

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Overview of materials for high-performance ceramics

DOCERAM Bezeichnung
DOCERAM Type
UnitA-132A-141Z-141CerazurVolcera 141EvoCera
Material
Material
-AI2O3
>99,7%
AI2O3
>99,99%
ZrO2 Y-PSZZrO2 Y-PSZSi3N4-
Farbe
Colour
-elfenbein
ivory
hellrosa
pink
weiß
white
blau
blue
grau, schwarz
grey, black
-
Dichte
Density
(g/cm3)3.93.9>6.0463.25.9
Biegefestigkeit
Flexural Strength
(MPa)390390120013001000400
Druckfestigkeit
Compressive Strength
(MPa)390039003000300025003000
E-Modul
Modulus of Elasticity
(GPa)390390205205320218
Bruchzähigkeit
Fracture Toughness
(MPa√m)5.25.28126.4-
Weibull Modul
Weibull Modulus
-121212251450
Vickers Härte
Vickers Hardness
(HV 0.5)200020001300115016501047
Wärmeausdehnung
Thermal Expansion Coefficient
(10 -6K-1)5.5-8.45.5-8.410103.411.1
Wärmeleitfähigkeit
Thermal Conductivity
(W/mK)2828<2<2223.55
Temp. Wechselbeständigkeit
Thermal-Shock Resistance
(ΔT°C)120180290280830-
Maximale Einsatztemperatur
Maximum Operating Temperature
(°C)17001700100010001200-
Spez. Widerstand bei 20°C
Volume Resistivity at 20°C
(Ω cm)> 1017> 1015> 1010> 1010> 1011-
Durchschlagsfestigkeit
Dielectric Strength
(kV/mm)2230--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.