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High-silica Glass vs. Hafnia

High-silica glass belongs to the glass and glass-ceramics classification, while hafnia belongs to the oxide-based engineering ceramics. There are 6 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 high-silica glass and the bottom bar is hafnia.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.4
9.7
Elastic (Young's, Tensile) Modulus, GPa 78
57
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
9.0
Stiffness to Weight: Axial, points 19
3.3
Stiffness to Weight: Bending, points 61
13
Thermal Expansion, µm/m-K 0.6 to 0.75
6.0