Melt–gas phase equilibria and state diagrams of the selenium–tellurium system


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The partial pressures of saturated vapor of the components in the Se–Te system are determined and presented in the form of temperature–concentration dependences from which the boundaries of the melt–gas phase transition are calculated at atmospheric pressure and vacuums of 2000 and 100 Pa. The existence of azeotropic mixtures is revealed. It is found that the points of inseparably boiling melts correspond to 7.5 at % of Se and 995°C at 101325 Pa, 10.9 at % at 673°C and 19.5 at % at 522°C in vacuums of 2000 and 100 Pa, respectively. A complete state diagram is constructed, including the fields of gas-liquid equilibria at atmospheric and low pressures, the boundaries of which allow us to assess the behavior of selenium and tellurium upon distillation fractionation.

Sobre autores

V. Volodin

AO Center for Earth Sciences, Metallurgy, and Enrichment

Autor responsável pela correspondência
Email: nuri_eng@mail.ru
Cazaquistão, Almaty, 050010

S. Trebukhov

AO Center for Earth Sciences, Metallurgy, and Enrichment

Email: nuri_eng@mail.ru
Cazaquistão, Almaty, 050010

N. Burabaeva

AO Center for Earth Sciences, Metallurgy, and Enrichment

Email: nuri_eng@mail.ru
Cazaquistão, Almaty, 050010

A. Nitsenko

AO Center for Earth Sciences, Metallurgy, and Enrichment

Email: nuri_eng@mail.ru
Cazaquistão, Almaty, 050010

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