Zinc Selenide (ZnSe)
Application fields IR optics; Substrates; Electrooptical modulators
CAS # 1315-09-9
Growth methods HPVB or HPVZM
Density 5.264 g/cm3
Hardness 105 kg/mm2
Flexural Strength (4pt bending) 7500 psi
Young’s Modulus 10.2 Mpsi
Poisson Ratio 0.28
Coefficient of thermal expansion 7.1´10-6/K
Specific Heat 0.339 J/gK
Thermal conductivity 0.16 W/cmK
Eg at 295 K 2.67 eV
Dielectric Constant 8.976
Max. Transmittance (l =2.5-15 mm) ³ 70.5 %
Absorption Coefficient (l =10.6 mm) (1-2)´10-3 cm-1 (including 2 surfaces)
Damage threshold (l =10.6 mm) ³ 100 kWt/cm2
Thermo-Optic Coef. (dn/dT) 6.1 ( l =10.6 mm)
Refractive index (l =10.6 mm) 2.4
Electrooptical coefficient r41 (l =10.6 mm) 2.2´10-12 m/V
g-radiation tolerance dose > 106 J/kg

ZnSe refractive index in the IR

Wavenumber, cm-1
n
Wavenumber, cm-1
n
Wavenumber, cm-1
n
3400
2.408
1900
2.406
750
2.386
3200
2.408
1750
2.406
660
2.365
2800
2.408
1400
2.405
500
2.302
2400
2.408
1250
2.404
450
2.273
2100
2.407
1000
2.403
    

Transmittance spectra


 

Concentration of impurities by GDMS in ZnSe crystals (PDF file)
Material Safety Data Sheet