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Lithium Fluoride vs. Silica Aerogel

Lithium fluoride 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 lithium fluoride and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.6
0.1
Elastic (Young's, Tensile) Modulus, GPa 120
0.0050
Poisson's Ratio 0.27
0.2
Shear Modulus, GPa 52
0.0030
Stiffness to Weight: Axial, points 24
0.028
Stiffness to Weight: Bending, points 62
57
Thermal Conductivity, W/m-K 12
0.016
Thermal Expansion, µm/m-K 32
2.0