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Engineering Porcelain vs. Silica Aerogel

Both engineering porcelain and silica aerogel are oxide-based engineering ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (15, 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 engineering porcelain and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 150
0.0050
Poisson's Ratio 0.17
0.2
Shear Modulus, GPa 34
0.0030
Tensile Strength: Ultimate (UTS), MPa 130
0.016

Thermal Properties

Thermal Conductivity, W/m-K 1.8 to 6.5
0.016
Thermal Expansion, µm/m-K 2.0 to 6.6
2.0

Otherwise Unclassified Properties

Density, g/cm3 2.3 to 3.0
0.1

Common Calculations

Stiffness to Weight: Axial, points 16 to 29
0.028
Stiffness to Weight: Bending, points 49 to 65
57
Strength to Weight: Axial, points 12 to 16
0.044
Strength to Weight: Bending, points 19 to 25
1.4
Thermal Shock Resistance, points 11 to 53
110