Description

ZnS grown by chemical vapor desposition (CVD) often used in the 8 to *2 microns region. Its high resistance to rain erosion and high-speed dust and particulate abrasion makes it particularly suitable for exterior IR windows on aircraft frames. 

Optical Properties

Bulk Absorption Coefficient When *0.6µm <= 0.*4 cm*1 
Temperature Change of Refractive Index When *0.6µm *1 x ***6/°C 
Refractive Index Inhomogeneity When *0.6µm < **0 x ***6 

Thermal Properties

Thermal Conductivity when *0° C 0.**7 W/cm/°C 
Specific Heat 0.**9 J/g/°C 
Linear Expansion Coefficient When *0° C 6.8 x***6/°C 

Mechanical Properties

Youngs Modulus *4.5 GPa (*0.8 x **6 psi) 
Rupture Modulus **3.4 MPa (*5,**0 psi) 
Knoop Hardness ******0 kg/mm2 
Density 4.*8 g/cm3 
Poissons Ratio 0.*7