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Silica Aerogel vs. CVD Diamond

Silica aerogel belongs to the oxide-based engineering ceramics classification, while CVD diamond belongs to the non-oxide engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (9, 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 CVD diamond.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.0050
1050
Poisson's Ratio 0.2
0.1
Tensile Strength: Ultimate (UTS), MPa 0.016
750

Thermal Properties

Thermal Conductivity, W/m-K 0.016
1900
Thermal Expansion, µm/m-K 2.0
1.0

Otherwise Unclassified Properties

Density, g/cm3 0.1
3.5

Common Calculations

Stiffness to Weight: Axial, points 0.028
170
Stiffness to Weight: Bending, points 57
96
Strength to Weight: Axial, points 0.044
59
Strength to Weight: Bending, points 1.4
52
Thermal Shock Resistance, points 110
51