Aluminum Nitride (AlN) vs Alumina 99.5% (Al2O3)
Property comparison of Aluminum Nitride (AlN) and Alumina 99.5% (Al2O3), both ceramic.
| Property | Aluminum Nitride (AlN) | Alumina 99.5% (Al2O3) | Difference |
|---|---|---|---|
| Elastic modulus | 330,000 MPa | 375,000 MPa | +14% |
| Shear modulus | 133,000 MPa | 152,000 MPa | +14% |
| Poisson ratio | 0.24 | 0.22 | -8% |
| Density | 3,260 kg/m³ | 3,890 kg/m³ | +19% |
| Thermal conductivity | 170 W/m·K | 30 W/m·K | -82% |
| Specific heat | 740 J/kg·K | 880 J/kg·K | +19% |
| Coefficient of thermal expansion | 0.000005 1/K | 0.000008 1/K | +80% |
Difference is Alumina 99.5% (Al2O3) relative to Aluminum Nitride (AlN). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- ASTM
- standard
- ASTM
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