Zinc Selenide Properties
Zinc Selenide Properties
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Transmission
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Optical Properties
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10% transmission limits (t=6mm)
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0.5 - 22µm | ||
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Index of refraction inhomogenity (n/n)
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| (ppm @ 0.6328µm) | < 3 | ||
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Thermo-optic coefficient, dn/dT(298-358K)
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| (1/K @ 0.6328µm) | 1.07 x 10-4 | ||
| (1/K @ 1.15µm) | 7 x 10-5 | ||
| (1/K @ 3.39µm) | 6.2 x 10-5 | ||
| (1/K @ 10.6µm) | 6.1 x 10-5 | ||
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Bulk absorption coefficient
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| (1/cm @ 1.3µm) | 5.0 x 10-3 | ||
| (1/cm @ 2.7µm) | 7.0 x 10-4 | ||
| (1/cm @ 3.8µm) | 4.0 x 10-4 | ||
| (1/cm @ 5.25µm) | 4.0 x 10-4 | ||
| (1/K @ 10.6µm) | 5.0 x 10-4 | ||
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Physical Properties
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Crystal Structure
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cubic | ||
| Grain size | diameter | 50 - 70 µm | |
| Density | diameter | 50 - 70 µm | |
| Grain size | (g cm-3 @ 298K) | 5.27 | |
| Resistivity | -cm | ~1012 | |
| Chemical purity | (%) | 99.9996 | |
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Thermal Properties
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Coefficient of Thermal Expansion
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| (1/K @273 K) | 7.1 x 10-6 | ||
| (1/K @373 K) | 7.8 x 10-6 | ||
| (1/K @473 K) | 8.3 x 10-6 | ||
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Thermal conductivity
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| (J/K-m-s @ 298 K) | 18.0 | ||
| Heat Capacity | (J/g-K @ 298 K) | 0.339 | |
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Maximum operating temperature will depend on the environment.
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Mechanical Properties
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Hardness
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Knoop, 50 gm load (kg mm-2) | 110 | |
| Vickers, 1 kg load (kg mm-2) | 112 | ||
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Flexural strength (modulus of rupure)
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| 4 pt. loading (psi) | 8.0 x 103 | ||
| 4 pt. loading (MPa) | 55 | ||
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Fracture toughness (critical stress intensity factor, KIC values)
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| (MPa√m, Vickers, 100g) | 0.5 | ||
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Young's Modulus (elastic modulus)
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| (psi) | 9.75 x 106 | ||
| (GPa) | 67.2 | ||
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Poisson's ratio
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0.28 | ||
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Rain erosion resistance will depend on the environment.
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