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Silica Aerogel vs. Gallium Arsenide

Silica aerogel belongs to the oxide-based engineering ceramics classification, while gallium arsenide belongs to the non-glass optical ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 0.1
5.3
Elastic (Young's, Tensile) Modulus, GPa 0.0050
85
Poisson's Ratio 0.2
0.31
Stiffness to Weight: Axial, points 0.028
8.9
Stiffness to Weight: Bending, points 57
28
Thermal Conductivity, W/m-K 0.016
47
Thermal Expansion, µm/m-K 2.0
5.6