|
|
|
 |
Materials |
 |
|
| |
|
|
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 |
|
|
