透射镜片材料 — Zinc Selenide (ZnSe) 硒化锌
| Transmission Range % | 50 |
| Transmission Range | 0.48 – 20.5 µm (thickness 2 mm) |
| Refractive Index | 2.5906 @ 633 nm |
| Reflection Loss | 17.05%@10 µm |
| Residual Beam Wavelength | 45.7 µm |
| Density | 5.27 g/cm3 |
| Melting point | >500°C (sublimation) |
| Molecular Weight | 144.3 |
| Thermal Conductivity | 18 W/(m·K) @298K |
| Spec. Heat Capacity | 339.13 J/(kg·K) @20°C |
| Thermal Expansion | 7.1 · 10-6 /K @273K |
| Hardness (Mohs) | 110 (Indenter load 50g) |
| Young’s Modulus | 70.3 GPa |
| Shear Modulus | 28.9 GPa |
| Bulk Modulus | 63.1 GPa |
| Fracture Modulus | 55 MPa |
| Elastic Coefficient | C11 = 86.4; C12 = 51.5; C44 = 40.2 GPa |
| Dielectric Constant | 9.12 @298K |
| Solubility in Water | unsoluble |
| Crystal Structure | polycrystalline, synthetic |
| Crystal Type | cubic, sphalerite type structure, grain size 100 µm |
| Cleavage Planes | no cleavage |
| Poisson Ratio | 0.3 |
| Application | CO2-laser optics, cutting lenses, IR optics |
