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Marketech International Inc.
107B Louisa Street
Port Townsend, WA 98368
Tel: 360-379-6707
107B Louisa Street
Port Townsend, WA 98368
Tel: 360-379-6707
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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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| Indices of Refraction (n) As a function of wavelength at room temperature. |
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| Wavelength (µ) | n | Wavelength (µ) | n |
| 0.54 | 2.6754 | 7.40 | 2.4201 |
| 0.58 | 2.6312 | 7.80 | 2.4184 |
| 0.62 | 2.5994 | 8.20 | 2.4163 |
| 0.66 | 2.5755 | 8.60 | 2.4143 |
| 0.70 | 2.5568 | 9.00 | 2.4122 |
| 0.74 | 2.4518 | 9.40 | 2.4100 |
| 0.78 | 2.5295 | 9.80 | 2.4077 |
| 0.82 | 2.5193 | 10.20 | 2.4053 |
| 0.86 | 2.5107 | 10.60 | 2.4028 |
| 0.90 | 2.5034 | 11.00 | 2.4001 |
| 0.94 | 2.4971 | 11.40 | 2.3974 |
| 0.98 | 2.4916 | 11.80 | 2.3945 |
| 1.00 | 2.4892 | 12.20 | 2.3915 |
| 1.40 | 2.4609 | 12.60 | 2.3883 |
| 1.80 | 2.4496 | 13.00 | 2.3850 |
| 2.20 | 2.4437 | 13.40 | 2.3816 |
| 2.60 | 2.4401 | 13.80 | 2.3781 |
| 3.00 | 2.4376 | 14.20 | 2.3744 |
| 3.40 | 2.4356 | 14.60 | 2.3705 |
| 3.80 | 2.4339 | 15.00 | 2.3665 |
| 4.20 | 2.4324 | 15.40 | 2.3623 |
| 4.60 | 2.4309 | 15.80 | 2.3579 |
| 5.00 | 2.4295 | 16.20 | 2.3534 |
| 5.40 | 2.4281 | 16.60 | 2.3487 |
| 5.80 | 2.4266 | 17.00 | 2.3438 |
| 6.20 | 2.4251 | 17.40 | 2.3387 |
| 6.60 | 2.4235 | 17.80 | 2.3333 |
| 7.00 | 2.4218 | 18.20 | 2.3278 |