Z. Q. Wang, D. Stroud, A. J. Markworth
Apr 1, 1994
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Journal
Scripta Metallurgica Et Materialia
Abstract
Cadmium telluride (CdTe) is a widely used semiconductor, having applications as gamma-ray detector as well as excellent photorefractive and electrooptic characteristics in the infrared. It is also used as a substrate for HgCdTe for the detection of infrared radiation. These applications generally require large high-quality crystals containing minimum quantities of defects such as grain boundaries, dislocations, and residual impurities. In this work, the authors estimate the temperature-dependent thermal conductivity and liquid CdTe, as well as the kinematic viscosity of CdTe and several other liquid semiconductors at melting. Both of these properties are necessary inputs in models of crystal growth. To estimate the viscosity, and the molecular contribution to the thermal conductivity, they use both a hard-sphere model in combination with a transformed Debye formula. The electronic part of thermal conductivity is calculated from the Wiedemann-Franz law.