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Potassium Bromide vs. Silica Aerogel

Potassium bromide belongs to the non-glass optical ceramics classification, while silica aerogel belongs to the oxide-based engineering ceramics. There are 8 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 potassium bromide and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.8
0.1
Elastic (Young's, Tensile) Modulus, GPa 24
0.0050
Poisson's Ratio 0.17
0.2
Shear Modulus, GPa 7.0
0.0030
Stiffness to Weight: Axial, points 4.7
0.028
Stiffness to Weight: Bending, points 35
57
Thermal Conductivity, W/m-K 4.8
0.016
Thermal Expansion, µm/m-K 39
2.0