Cadmium Telluride (CdTe / CdHgTe)
Crystal properties |
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Application fields: | IR optics, substrates, detectors, crystal pieces for vacuum deposition. |
Structure | Cubic zincblende |
Density | 5.85 g/cm3 |
Knoop Hardness | 45 kg/mm2 |
Young’s Modulus | 3.7 x1011 dyne/cm2 |
Rupture Modulus | 2.2 x108 dyne/cm2 |
Poisson Ratio | 0.41 |
Coef. of Thermal Expansion | 5.9 x 10-6/K |
Specific Heat | 0.21 J/gK |
Thermal conductivity (at 25 oC) | 0.06 W/cmK |
Max. Transmittance (l =7-12 ?m) | 66 % |
Absorption Coef. (l =10.6 µm) | £ 0.003 cm-1 (including 2 surfaces) |
Thermo-Optic Coef. (dn/dT) | 11.0 (l =10.6 µm) |
Refractive index (l =10.6 µm) | 2.69 |
Max. IR-optic blank diameter/length | l 40 x 45 mm |
Max. single crystal diameter/length | l 40 x 30 mm |
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