ZnSe Zinc Selenide
ZnSe is a yellow transparent polycrystalline optical material with grain size about70μm and transmission0.5-15μm. Chemical-vapor-deposited material has virtually no impurity absorption and very low scattering. Low absorption at10.6μm makes it a preferred material for high-power CO2-laser optics and other systems across its transmission band.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Structure | Cubic (zincblende) |
| Density | 5.264 g/ cm³ |
| Hardness | 105 kg/ mm² |
| Flexural Strength (4pt bending) | 7500 psi |
| Young’s Modulus | 10.2 Mpsi |
| Poisson Ratio | 0.28 |
| Coefficient of thermal expansion | 7.1×10−6/K |
| Specific Heat | 0.339 J/gK |
| Thermal conductivity | 0.16 W/cmK |
| Eg at 295 K | 2.67 eV |
| Dielectric Constant | 8.976 |
| Max. Transmittance (λ=2.5-15 μm) | ≥70.5 % |
| Absorption Coefficient (λ=10.6 μm) [λ=10.6 μm / including 2 surfaces] | (1-2)×10-3 cm-1 (including 2 surfaces) |
| Damage threshold (λ=10.6 μm) | ≥100 kWt/cm2 |
| Thermo-Optic Coef. (dn/dT) [λ=10.6 μm] | 6.1 ( λ=10.6 μm) |
| Refractive index (λ=10.6 μm) | 2.4 |
| Electrooptical coefficient r41 (λ=10.6 μm) | 2.2×10-12 m/V |
| γ-radiation tolerance dose | > 106 J/kg |
| Diameter/Width [ZnSe rods / wafers / windows / lenses] | 1-50 mm |
| Thickness/length [ZnSe rods / wafers / windows / lenses] | 0.1-150 mm |
| Orientation [ZnSe rods / wafers / windows / lenses] | (110), (111) |
| Surface quality [ZnSe Rods/Wafers/Windows/Lenses / per MIL-0-13830] | As-grown, as-cut, 80/50, 60/40, 40/20 per MIL-0-13830 |
| Purity [ZnSe Granules for Evaporation-Deposited Coatings] | 99.99%, 99.999% |
| Particle size [ZnSe Granules for Evaporation-Deposited Coatings] | 0.01- 10 mm |
Applications
Key Features
Datasheet
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