Active Member
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[China]
Address: Building 7, No. 116, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province
Contact name:Jason
Wuhan Siwer Optics Co.,Ltd |
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Zinc Sulphide (ZnS) is a widely used IR transmitting material in windows, lenses and prisms. The material transmits at about 50% between 0.4 -12μm before dropping off to zero transmission around 15μm. Its low absorbance in the IR spectrum makes it desirable for CO2 lasers operating at 10.6μm. Zinc Sulphide has a pale yellow to clear appearance and a hardness of HK160. Although the material is resistant to thermal shock, it is not recommended for harsh environments.
| Material | CVD Zinc Selenide |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Surface Quality | 40/20 Scratch-Dig |
| Surface Flatness (Plano Side) | λ/2 at 633nm |
| Surface Irregularity (Peak to Valley) | λ/4 at 633nm |
| Angle tolerance | 3 arcmin (5 seconds according to customer requirements) |
| Chemical Formula | ZnSe |
| Molecular Weight | 144.33 |
| Crystal Class | Cubic, hexagonal |
| Crystal Structure | Polycrystalline |
| Density, g/cm3 at 293 K | 5.27 |
| Melting Temperature, K | 1790 |
| Thermal Conductivity, W/(m K) at 300 K | 18 |
| Thermal Expansion, 1/K | |
| at 173 K | 5.6 x 10-6 |
| at 273 K | 7.1 x 10-6 |
| at 473 K | 8.3 x 10-6 |
| Specific Heat, cal/(g K) at 296 K | 0.081 |
| Debye Temperature, K | 246 |
| Bandgap, eV | 2.7 |
| Solubility in water at 298 K | 0.001 g/100 g H2O |
| Knoop Hardness, kg/mm2(100 g load) | 105 |
| Young's Modulus, GPa | 70 |
| Bulk Modulus, GPa | 40 |
| Poisson's Ratio | 0.28 |
