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.
Technical data of our material is as below:
Parameter |
Unit |
99.5% Al2O3 |
99% Al2O3 |
Density |
g/cm 3 |
3.9 |
3.88 |
Hardness |
Rockwell |
HRA 86 |
HRA 85 |
Compressive Strength |
MPa |
2100 |
2000 |
psi |
304, 500 |
290, 000 |
Flexural Strength |
MPa |
350 |
310 |
psi |
51, 000 |
45, 000 |
Elastic Modulus |
GPa |
360 |
330 |
psi |
52 x 10 6 |
48 x 10 6 |
Thermal Conductivity |
W / m K |
29 |
26 |
Coefficient of
Thermal Expansion |
1 x 10 -6 / K |
8.2 |
8.2 |