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Alpha Quartz vs. ZA-12

Alpha quartz and ZA-12 belong to fundamentally different material chemistries. Alpha quartz is a ceramic material, while ZA-12 is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (26, 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 ZA-12.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 91
83
Knoop Hardness 740
110 to 130
Poisson's Ratio 0.13
0.26
Shear Modulus, GPa 31
33

Thermal Properties

Melting Onset (Solidus), °C 1590
380
Specific Heat Capacity, J/kg-K 720
450
Thermal Conductivity, W/m-K 8.5
120
Thermal Expansion, µm/m-K 9.5
24

Otherwise Unclassified Properties

Density, g/cm3 2.7
6.0

Common Calculations

Stiffness to Weight: Axial, points 19
7.6
Stiffness to Weight: Bending, points 57
24
Thermal Diffusivity, mm2/s 4.4
43