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Zinc Selenide vs. Alumina

Zinc selenide belongs to the non-glass optical ceramics classification, while alumina belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is zinc selenide and the bottom bar is alumina.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 5.3
3.4 to 4.1
Elastic (Young's, Tensile) Modulus, GPa 69
220 to 370
Melting Onset (Solidus), °C 1520
2040
Poisson's Ratio 0.28
0.22 to 0.24
Specific Heat Capacity, J/kg-K 340
870 to 940
Stiffness to Weight: Axial, points 7.3
35 to 53
Stiffness to Weight: Bending, points 26
57 to 62
Thermal Conductivity, W/m-K 17
14 to 30
Thermal Diffusivity, mm2/s 9.5
3.7 to 10
Thermal Expansion, µm/m-K 7.3
6.7 to 8.2