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Zirconia vs. Alpha Quartz

Zirconia belongs to the oxide-based engineering ceramics classification, while alpha quartz belongs to the non-glass optical 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 zirconia and the bottom bar is alpha quartz.

Metric UnitsUS Customary Units

Material Properties

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