High Quality Alumina Ceramic Crucible

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ItemAl2O3 Content(%)99
　Heat resistance(℃)1800
Physical CharacteristicsBulk density(g/cm3)3.9
　Water absorption(%)0
　Flexural strength(Mpa)360
　Hardness vickers (Gpa)15.6
Mechanical CharacteristicsElastic modulus (Gpa)370
　Poisson’s ratio0.23
　Linear expansion coefficient(20℃-500℃) 10-6/℃8
Thermal CharacteristicsThermal conductivity  w/(m.k)32
　Specific Heat  *10-3J/(kg*K)0.9
　Dielectric constant (1MHZ)9.9
Electrical CharacteristicsDielectric loss angle  *10-4 1
　Dielectric strength  *106V/m15

Corundum ceramic crucible, also known as alumina crucible, 99.70% corundum crucible in 1800℃1650℃- 1700℃ corundum crucible in the atmosphere of oxidation and reduction, has a good high temperature insulation and mechanical strength.High thermal conductivity, small thermal expansion.Does not react with air, water vapor, hydrogen, carbon monoxide and so on above 1700℃.Short-term maximum service temperature 1800℃. 99.35% Corundum ceramic crucible has good high temperature insulation and mechanical strength in oxidation and reduction atmosphere.