Preliminary communication

Behavior of copper chalcogenides during vacuum-thermal processing

A. Nitsenko orcid.org/0000-0001-6753-0936 ; Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan
V. Volodin ; Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan
X. Linnik orcid.org/0000-0002-0683-1409 ; Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan
N. Burabaeva ; Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan
F. Tuleutay ; Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan

Abstract

In this work, thermodynamic functions of evaporation of copper chalcogenides (Cu₂S, Cu₂Se, and Cu₂Te) are determined via previously published data and thermodynamic values obtained by the authors of the work. The obtained results indicate a very low probability of separation of compounds into copper and chalcogen by dissociation under vacuum-thermal processing conditions. Liquid-vapor phase transitions in binary systems Cu₂S – Cu₂Se, Cu₂S – Cu₂Te, and Cu₂Se – Cu₂Te at low pressures of 15 and 0,7 kPa are constructed based on the vapor pressure of copper chalcogenides. It is shown that the pressure eases over the liquid bath impairs the separation of chalcogens, therefore separation in one stage by thermo-vacuum treatment at a pressure of 0,7 – 15 kPa is not possible.

Keywords

copper chalcogenides; vacuum; thermal processing; dissociation; vapor pressure

Hrčak ID:

281409

URI

https://hrcak.srce.hr/281409

Publication date:

1.1.2023.

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