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Parameters of alumina ceramics

Nov 24, 2020
Material

Unit

A95%A97%

A99%

A99.7%
Densityg/cm³3.63.723.853.85
Flexural StrengthMpa290300350350
Compressive StrengthMpa3300340036003600
Modulus of ElasticityGpa340350380380
Impact ResistanceMPam1/23.94.05.05.0
Weibull Modulus M10101111
Vickers HardulusHV0.51800185019001900
Thermal Expansion Coefficient10-6K-15.0-8.35.0-8.35.4-8.35.4-8.3
Thermal ConductivityW/Mk23242727
Thermal   Shock Resistance△T℃250250270270
Maximum Use Temperature1600160016001600
Volume Resistivity at 20℃Ω≥1014≥1014≥1014≥1014
Dielectric StrengthKV/mm20202020
Dielectric constantεr10101010