Alumina is historically the most cost-effective and widely used engineering ceramic. It has a good combination of properties:
· Good hardness and wear resistance
· High strength and stiffness
· Good thermal stability
· Almost chemically inert

Alumina can be produced in purity ranges from 95% up to 99.5% (available in ivory color), for various applications.

ParameterUnit

J6995

(99.5% Al2O3)

J6990

(99% Al2O3)

Densityg/cm33.93.88
HardnessRockwellHRA 86HRA 85
Compressive StrengthMpa21002000
psi304,500290,000
Flexural StrengthMpa350310
psi51,00045,000
Elastic ModulousGpa360330
psi52×10648x106
Thermal ConductivityW/(m.K)2926
Coefficient of
Thermal Expansion
1×10-6/K8.28.2

More grade Aluminum Oxide with 95%, 97% and 98% are also available for enquiry!

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