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High-silica Glass vs. Zirconia

High-silica glass belongs to the glass and glass-ceramics classification, while zirconia belongs to the oxide-based engineering ceramics. There are 8 material properties with values for both materials. Properties with values for just one material (18, 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 zirconia.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.4
5.7 to 6.0
Dielectric Strength (Breakdown Potential), kV/mm 34
7.7 to 9.0
Elastic (Young's, Tensile) Modulus, GPa 78
190 to 200
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
4.5 to 11
Flexural Strength, MPa 34
630 to 970
Stiffness to Weight: Axial, points 19
19
Stiffness to Weight: Bending, points 61
33 to 34
Thermal Expansion, µm/m-K 0.6 to 0.75
8.8 to 9.5