Zinc selenide (Znse) is a kind of yellow transparent polytropism material, whose general crystallization pellet size is 70µm and transmitting scope is 0.5-15 µm. Generated from CVD method, Zinc selenide(ZnSe) has little impurity absorption and extremely low scattering loses. Due to the low absorption to 10.6 µm wave length light, it becomes the first choice to manufacture the optical component for high power CO2 laser system. In addition, it is also commonly used in different optical systems within its entire transmitting wave band.

Material Properties<Zinc selenide(ZnSe)> Optical Properties   Bulk Absorption Coefficient  10.6µm <= 0.0005 cm-1 Temperature Change of Refractive Index  10.6µm 61 x 10-6/°C Refractive Index Inhomogeneity  0.6328µm < 3 x 10-6 Thermal Properties   Thermal Conductivity 20° C 0.18 W/cm/°C Specific Heat 0.356 J/g/°C Linear Expansion Coefficient 20° C 7.57 x 10-6/°C Mechanical Properties   Young’s Modulus 67.2 GPa (9.75 x 106 psi) Rupture Modulus 55.1 MPa (8,000 psi) Knoop Hardness 105-120 kg/mm2 Density 5.27 g/cm3 Poisson’s Ratio 0.28