Gallium Arsenide vs. Aluminum Nitride
Gallium arsenide belongs to the non-glass optical ceramics classification, while aluminum nitride belongs to the non-oxide engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is gallium arsenide and the bottom bar is aluminum nitride.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 5.3 | |
| 2.9 to 3.3 |
| Elastic (Young's, Tensile) Modulus, GPa | 85 | |
| 330 |
| Knoop Hardness | 750 | |
| 1160 |
| Poisson's Ratio | 0.31 | |
| 0.21 to 0.31 |
| Specific Heat Capacity, J/kg-K | 360 | |
| 780 |
| Stiffness to Weight: Axial, points | 8.9 | |
| 55 to 63 |
| Stiffness to Weight: Bending, points | 28 | |
| 69 to 80 |
| Thermal Conductivity, W/m-K | 47 | |
| 80 to 190 |
| Thermal Diffusivity, mm2/s | 25 | |
| 31 to 74 |
| Thermal Expansion, µm/m-K | 5.6 | |
| 4.2 to 5.4 |