ZnSe — Zinc Selenide
ZnSe Yellow Transparent Polycrystalline IR Material,Usually CVD,Grains Approx.70μm,Important Especially for High-Power CO₂ Systems.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Chemical Formula | ZnSe |
| Molecular Weight | 144.33 |
| Crystal Structure | Cubic Zinc Blende |
| Color | Transparent Yellow |
| Density | 5.27g/cm³ |
| Resistivity | >10¹²Ω cm |
| Transmission Wavelength-Band Range | 0.6~21.0μm |
| Refractive Index [@10.6μm] | 2.4028 |
| Reflection Loss [@10.6μm; 2 Surfaces] | 0.291 |
| Absorption Peak (Reststrahlen) | 45.7μm |
| Thermo-optic Coefficient dn/dT [@10.6μm] | +61×10⁻⁶/°C |
| Refractive Index Inhomogeneity [@0.6328μm] | <3×10⁻⁶ |
| Melting Point | 1525°C |
| Thermal Conductivity [@298K] | 18W m⁻¹ K⁻¹ |
| Thermal Conductivity [@20°C] | 0.18W cm⁻¹ °C⁻¹ |
| Specific Heat Capacity | 0.339~0.356J g⁻¹ °C⁻¹ |
| Linear Thermal Expansion Coefficient [@20°C] | 7.57×10⁻⁶/°C |
| Young's Modulus | 67.2GPa |
| Poisson's Ratio | 0.28 |
| Mohs Hardness | 4 |
| Surface Quality | Typ: 40-20 (Scratch/Dig) |
| Surface Roughness [RMS] | typical:<100Å RMS |
| Clear Aperture Dimension | typical:≥90% of Diameter |
| Diameter Tolerance | typical:+0.0/-0.13mm |
| Thickness Tolerance | typical:±0.1mm |
| Aspheric Surface Figure Error [RMS @632.8nm] | Typ: λ/2 |
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Key Features
Datasheet
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