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Alpha Quartz vs. Zirconia

Alpha quartz belongs to the non-glass optical ceramics classification, while zirconia belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (16, 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 alpha quartz and the bottom bar is zirconia.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.7
5.7 to 6.0
Elastic (Young's, Tensile) Modulus, GPa 91
190 to 200
Knoop Hardness 740
1210 to 1300
Poisson's Ratio 0.13
0.25 to 0.29
Specific Heat Capacity, J/kg-K 720
400 to 510
Stiffness to Weight: Axial, points 19
Stiffness to Weight: Bending, points 57
33 to 34
Thermal Conductivity, W/m-K 8.5
2.2 to 4.3
Thermal Diffusivity, mm2/s 4.4
0.73 to 1.8
Thermal Expansion, µm/m-K 9.5
8.8 to 9.5