ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
The thermal diffusivities of mercury cadmium telluride, (Hg1−xCdx)1−yTey, and mercury zinc telluride, (Hg1−xZnx)1−yTey, with 0.55≤y≤1.0 and 0.0125≤x≤0.054 65, and of pure Te were measured from 350 to 850 °C by the laser flash technique. The diffusivity of near-pseudobinary Hg1−xCdxTe solids decreased more rapidly with temperature approaching the melting point than did pseudobinary solids previously reported: The solid diffusivity for x=0.028 17 and y=0.55 was 0.83 mm2/s at 371 °C, decreasing to 0.22 mm2/s at 614 °C. The diffusivity of Te-rich (Hg1−xCdx)1−yTey melt increased with x and with temperature: The melt diffusivity for x=0.039 36 and y=0.782 was 0.91 mm2/s at 485 °C, increasing to 4.93 mm2/s at 851 °C. For Te-rich (Hg1−xZnx)1−yTey melt with x=0.0125 and y=0.7944 there appeared to be a minimum diffusivity of about 2.6 mm2/s near 690 °C. The thermal diffusivity of pure Te solid was 0.97 mm2/s at 300 °C and decreases to 0.64 mm2/s at 439 °C. The melt diffusivity of pure Te was 1.52 mm2/s at 486 °C, increased to 3.48 mm2/s at 584 °C. Experimental data presented can be used to calculate the thermal conductivity needed for designing systems capable of growing a better quality single crystal of these materials.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.357349
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