BEHAVIOR OF COPPER CHALCOGENIDES DURING VACUUM-THERMAL PROCESSING
Nitsenko A. Volodin V. Linnik X. Burabaeva N. Tuleutay F.
2023Faculty of Metallurgy
Metalurgija
2023#62Issue 1125 - 128 pp.
In this work, thermodynamic functions of evaporation of copper chalcogenides (Cu2 S, Cu2 Se, and Cu2 Te) are deter-mined 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 Cu2 S – Cu2 Se, Cu2 S – Cu2 Te, and Cu2 Se – Cu2 Te at low pressures of 15 and 0,7 kPa are constructed based on the vapor pressure of copper chalco-genides. 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.
dissociation , thermal processing , vacuum , vapor pressure , сopper chalcogenides
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Satbayev University, Institute of Metallurgy and Ore Beneficiation JSC, Almaty, Kazakhstan
Satbayev University
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