透射鏡片材料 —Zinc Sulphide (ZnS) 硫化鋅

透射鏡片材料 —Zinc Sulphide (ZnS) 硫化鋅

 

Transmission Range %50
Transmission Range0.38 – 14 μm (thickness?2 mm )
Refractive Index2.351415@633 nm
Reflection Loss14% @10 μm
Residual Beam Wavelength30.5 mm
Density4.09 g/cm3
Melting pointsublimation > 500°C
Molecular Weight97.43
Thermal Conductivity27.2 W/(m·K) @298K
Spec. Heat Capacity519.15 J/(kg·K)
Thermal Expansion6.5 · 10-6?/K @208…473K
Hardness (Mohs)160 (Indenter load 50g)
Young’s Modulus87.6 GPa
Shear Modulus33 GPa
Bulk Modulus80.41 GPa
Fracture Modulus68.9 MPa
Elastic CoefficientC11?= 102; C12?= 64.6; C44?= 44.6 GPa
Dielectric Constant8.393 @ (low frequency)
Solubility in Waterunsoluble
Crystal Structurepolycrystalline, synthetic, grain size < 200 μm
Crystal Typecubic Sphalerit type structure,?a = 5,42 ?
Lattice Constantsno cleavage
Poisson Ratio0.3
ApplicationIR optics, FLIR (Forward Looking Infrared) Systems, 2 qualities (FLIR, ms)

 


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