Hot-pressed polycrystalline Zinc Sulphide is an infrared optical material with a wide transmittance range. HP ZnS is made from high pure zinc sulphide raw material under vacuum and high temperature condition, which has good infrared transmission and thermal property and high impact overloading resistance. Since it can be directly pressed into large size plates and spherical domes windows withvarious curvatureradius, HP ZnS has been widely used to make infrared detector dome windows for defenses,s ecurity and aerospace applications.
| Physical Properties | ZnS | MS ZnS |
| Density, (g/cm3) | 4.08 | 4.09 |
| Hardness, (kg/mm2) (Vickers 200 gm load) |
210-240 | 150-165 |
| Young’s Modulus, (GPa) | 74.5 | 85.5 |
| Optical Properties | ZnS | MS ZnS |
| Max Transmittance 1 μm | – | 73.30% |
| Max Transmittance 10 μm | 70.00% | 75.30% |
| Wavelength, μm | Refractive Index ZnS |
Refractive Index MS ZnS |
| 10 | 2.2 |
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