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Beryllia vs. Silica Aerogel

Both beryllia 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 (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 beryllia and the bottom bar is silica aerogel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 350
0.0050
Poisson's Ratio 0.26
0.2
Shear Modulus, GPa 180
0.0030
Tensile Strength: Ultimate (UTS), MPa 140
0.016

Thermal Properties

Thermal Conductivity, W/m-K 270
0.016
Thermal Expansion, µm/m-K 8.0
2.0

Otherwise Unclassified Properties

Density, g/cm3 2.9
0.1

Common Calculations

Stiffness to Weight: Axial, points 67
0.028
Stiffness to Weight: Bending, points 82
57
Strength to Weight: Axial, points 14
0.044
Strength to Weight: Bending, points 21
1.4
Thermal Shock Resistance, points 3.6
110