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Engineering Porcelain vs. Alpha Quartz

Engineering porcelain belongs to the oxide-based engineering ceramics classification, while alpha quartz belongs to the non-glass optical ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is engineering porcelain and the bottom bar is alpha quartz.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 150
91
Knoop Hardness 600
740
Poisson's Ratio 0.17
0.13
Shear Modulus, GPa 34
31

Thermal Properties

Specific Heat Capacity, J/kg-K 600 to 1000
720
Thermal Conductivity, W/m-K 1.8 to 6.5
8.5
Thermal Expansion, µm/m-K 2.0 to 6.6
9.5

Otherwise Unclassified Properties

Density, g/cm3 2.3 to 3.0
2.7

Common Calculations

Stiffness to Weight: Axial, points 16 to 29
19
Stiffness to Weight: Bending, points 49 to 65
57
Thermal Diffusivity, mm2/s 0.73 to 3.9
4.4