Abstract
Total vapor pressure measurement and Knudsen cell mass spectrometry have been applied to study sublimation processes in the quasi-binary system CdTe-ZnTe at temperatures 780 K - 1350 K. This system was shown to correspond to the vapor pressure minimum in the pressure-temperature-composition (P-T-X) phase diagram of the ternary system Cd-Zn-Te. The shape of the solidus and vaporus surfaces was traced via experimental isothermal and isobaric sections of the P min area up to the near-melting region. Relationship between the composition of the crystal, vapor pressure and composition of the vapor was determined in the whole concentration range. At temperatures above 780 K CdTe-ZnTe was found to be a continuous solid solution with incongruent sublimation, whereas at T = 780 K a tendency to phase separation was observed.
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