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Silica Aerogel vs. Aluminum Nitride

Silica aerogel belongs to the oxide-based engineering ceramics classification, while aluminum nitride belongs to the non-oxide engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (18, 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 aluminum nitride.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 0.1
2.9 to 3.3
Elastic (Young's, Tensile) Modulus, GPa 0.0050
330
Poisson's Ratio 0.2
0.21 to 0.31
Stiffness to Weight: Axial, points 0.028
55 to 63
Stiffness to Weight: Bending, points 57
69 to 80
Thermal Conductivity, W/m-K 0.016
80 to 190
Thermal Expansion, µm/m-K 2.0
4.2 to 5.4