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CVD Diamond vs. Silica Aerogel

CVD diamond belongs to the non-oxide engineering ceramics classification, while silica aerogel belongs to the oxide-based 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 CVD diamond and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

Density, g/cm3 3.5
0.1

Common Calculations

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