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Zinc Sulfide vs. Mullite

Zinc sulfide belongs to the non-glass optical ceramics classification, while mullite belongs to the oxide-based engineering ceramics. There are 9 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 sulfide and the bottom bar is mullite.

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Material Properties

Density, g/cm3 4.1
2.7 to 3.0
Elastic (Young's, Tensile) Modulus, GPa 75
110 to 170
Poisson's Ratio 0.28
Specific Heat Capacity, J/kg-K 520
Stiffness to Weight: Axial, points 10
22 to 31
Stiffness to Weight: Bending, points 34
58 to 62
Thermal Conductivity, W/m-K 27
3.5 to 11
Thermal Diffusivity, mm2/s 13
1.4 to 3.7
Thermal Expansion, µm/m-K 6.5