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