Korth Kristalle GmbH

Refractive Index


Zinc Selenide (ZnSe)

Properties (ZnSe)    
Transmission Range (50% of total transmission)  0,48 - 20,5 µm (thickness 2 mm)  
Refractive Index   2,5906 @ 633 nm  
Reflective Loss   17,05%@10 µm  
Reststrahlen   45.7 µm  
Density   5.27 g/cm3  
Melting Point   >500°C (sublimation) 
Molecular Weight   144.3  
Thermal_Conductivity   18 W/(m·K) @298K  
Heat Capacity   339,13 J/(kg·K) @20°C  
Thermal Expansion   7,1 · 10-6 /K @273K  
Hardness (Knoop)   110 (Indenter load: 50g)  
Young`s Modulus   70,3 GPa  
Shear Modulus   28,9 GPa 
Bulk Modulus   63,1 GPa 
Rupture Modulus   55 MPa  
Elastic Coefficient   C11 = 86,4; C12 = 51,5; C44 = 40,2 GPa  
Dielectric Constant   9,12 @298K 
Solubility in Water   unsoluble  
Crystal Structure  polycrystalline, synthetic  
Crystal Type  cubic, sphalerite type structure, grain size 100 µm  
Cleavage Planes   no cleavage  
Poisson Ratio   0,3 
Application   CO2-laser optics, cutting lenses, IR optics  
Remarks   laser damage threshold: 0.59 GW/cm2 @2.7 µm; 0.64 GW/cm2 @10.6 µm; max. temperature for application:300°C, reacts in combination with acids and concentrated bases.  

Transmission spectrum


Transmission spectrum-2

ZnSe homepage engl

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