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| ZINC SELENIDE CRYSTALS [ ZnSe ] |
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Zinc Selenide is used for optical windows, lenses, mirrors and prisms particularly for infrared applications. The transmission range is 0.5 μm - 22 μm. Used for high power CO2-laser optics at 10.6 micronsZinc Selenide is produced by synthesis from zinc vapour and H2Se gas, forming as sheets on graphite susceptors. It is microcrystalline in structure, the grain size being controlled to produce maximum strength. Single crystal ZnSe is available, but is not common but has been reported as having lower absorption and thus more effective for CO2 optics. |
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| Specification |
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 Transmission Range |
0.6 to 21.0μm |
| Refractive Index |
2.4028 at 10μm |
| Reflection Loss |
29.1% at 10.6μm [ 2 surfaces ] |
| Absorption Coefficient |
0.0005cm-1 at 10.6μm |
| Restrahlen Peak |
45.7microns |
| dn/dT |
+61 × 10-6/°C at 10.6μm at 298K |
| dn/dμ = 0 |
5.5μm |
| Density |
5.27g/cm3 |
| Melting Point |
1525°C [ dissociates about 700°C ] |
| Thermal Conductivity |
18 W/ [ mK ] at 298K |
| Thermal Expansion |
7.1 × 10-6/ °C at 273K |
| Hardness |
Knoop 120 with 50g indenter |
| Specific Heat Capacity |
339 J · kg-1 · K-1 |
| Bulk Modulus [ K ] |
40 GPa |
| Young's Modulus [ E ] |
67.2 GPa |
| Apparent Elastic Limit |
55.1 MPa [ 8,000psi ] |
| Poisson Ratio |
0.28 |
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| Note: |
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| 1. |
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| 2. |
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| 3. |
Download this crystal products catalogue please click: |
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