Zinc Sulfide vs. Zinc Selenide
Both zinc sulfide and zinc selenide are non-glass optical ceramics.
For each property being compared, the top bar is zinc sulfide and the bottom bar is zinc selenide.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 75 | |
| 69 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
Thermal Properties
| Melting Onset (Solidus), °C | 1830 | |
| 1520 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 340 |
| Thermal Conductivity, W/m-K | 27 | |
| 17 |
| Thermal Expansion, µm/m-K | 6.5 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.1 | |
| 5.3 |
| Light Transmission Range, µm | 0.37 to 14 | |
| 0.6 to 21 |
| Refractive Index | 2.3 | |
| 2.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 10 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 34 | |
| 26 |
| Thermal Diffusivity, mm2/s | 13 | |
| 9.5 |