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Aluminum Nitride vs. Silica Aerogel

Aluminum nitride belongs to the non-oxide engineering ceramics classification, while silica aerogel belongs to the oxide-based 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 aluminum nitride and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Material Properties

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