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StarCeram® A Aluminium Oxide (Alumina, Al₂O₃) 99.7% purity

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The key benefits of StarCeram® A include: Cheaper than other technical ceramics, high strength, high hardness, good temperature stability, high wear resistance, high corrosion resistance even at high temperatures.

Ashby charts

See where StarCeram® A Aluminium Oxide (Alumina, Al₂O₃) 99.7% purity falls on the material property chart for Density against Elastic modulus in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.





3.9 g/cm³ at 20 °C


Coefficient of thermal expansion


7.8E-6 1/K at 20 °C

RT - 1000°C

Max service temperature


1500 °C

Thermal conductivity


25 W/(m·K) at 20 °C

Thermal shock parameter R1


80 °C


Electrical resistivity


1.00E+12 Ω·m at 20 °C

Technological properties

Application areas

Air separator wheels, bearing bushes, protection sleeves, crucibles, cylinder linings, dose bushes, pistons, extruder screws, nozzles, slide valves, rotors, seals, sliding rings, stationary seats, wear protection parts, welding rolls, centering pins

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This material data has been provided by KYOCERA Fineceramics Precision GmbH.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.