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Materials
Junty > Material > Aluminum Oxide Ceramic
 
            
Aluminum Oxide Ceramic
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.
   
Parameter Unit 99.5% Al2O3 99% Al2O3
Density g/cm3 3.9 3.88
Hardness Rockwell HRA 86 HRA 85
Compressive Strength MPa 2100 2000
Flexural Strength MPa 350 310
Elastic Modulus GPa 360 330
Thermal Conductivity W / m K 29 26
Coefficient of Thermal Expansion 1 x 10 -6 / K 8.2 8.2