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Zinc Sulfide vs. Steatite

Zinc sulfide belongs to the non-glass optical ceramics classification, while steatite belongs to the oxide-based engineering ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (17, 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 zinc sulfide and the bottom bar is steatite.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 4.1
1.9 to 2.8
Elastic (Young's, Tensile) Modulus, GPa 75
68 to 120
Poisson's Ratio 0.28
Specific Heat Capacity, J/kg-K 520
850 to 860
Stiffness to Weight: Axial, points 10
14 to 32
Stiffness to Weight: Bending, points 34
52 to 83
Thermal Conductivity, W/m-K 27
1.8 to 2.5
Thermal Diffusivity, mm2/s 13
0.79 to 1.1
Thermal Expansion, µm/m-K 6.5
7.0 to 9.0