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Hafnia vs. Gallium Arsenide

Hafnia belongs to the oxide-based engineering ceramics classification, while gallium arsenide belongs to the non-glass optical ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is hafnia and the bottom bar is gallium arsenide.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 9.7
5.3
Elastic (Young's, Tensile) Modulus, GPa 57
85
Melting Onset (Solidus), °C 2900
1400
Specific Heat Capacity, J/kg-K 120
360
Stiffness to Weight: Axial, points 3.3
8.9
Stiffness to Weight: Bending, points 13
28
Thermal Conductivity, W/m-K 1.1
47
Thermal Diffusivity, mm2/s 0.95
25
Thermal Expansion, µm/m-K 6.0
5.6