Pyrolysis of synthetic copper telluride in an inert atmosphere

A.V. Nitsenko; X.A. Linnik; V.N. Volodin; F.Kh. Tuleutay; N. Bakhytuly

doi:10.31643/2025/6445.41

Authors

A.V. Nitsenko Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University https://orcid.org/0000-0001-6753-0936
X.A. Linnik Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University
V.N. Volodin Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University
F.Kh. Tuleutay Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University
N. Bakhytuly Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

DOI:

https://doi.org/10.31643/2025/6445.41

Keywords:

pyrolysis, tellurium, copper, copper telluride, phase composition, thermal analysis

Abstract

The paper presents the study results of the thermal behavior of synthetic copper telluride in an inert atmosphere at pressures of 92 and 0.07 kPa under isothermal and non-isothermal vacuum-thermal conditions. The thermal analysis results showed that the synthesized copper telluride undergoes polymorphic transformations at 185.7, 259, 318, 350, 470, and 834.5 °C. These transformations were established by early studies and are characteristic of copper tellurides of stoichiometric and non-stoichiometric compositions. It was found that the reduction of the pressure in the system slightly increases the final value of mass loss of the synthetic sample. The X-ray phase analysis results of the residues obtained at constant and increasing temperatures at a pressure of 0.07 kPa showed the absence of the formation of new phases relative to the initial composition. A change in the quantitative ratio of the available phases was found in the direction of an increase in the amount of Cu_0.656Te_0.344 relative to the initial composition with an increase in the process temperature.

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Author Biographies

A.V. Nitsenko, Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

Candidate of Technical Sciences, Head of the Vacuum Processes Laboratory of the Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko str., 29/133, 050010, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0001-6753-0936

X.A. Linnik, Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

Master of Technical Sciences, Junior Researcher of the Vacuum Processes Laboratory of the Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko str., 29/133, 050010, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0002-0683-1409

V.N. Volodin, Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

Doctor of Technical Sciences, Professor, Chief Researcher of the Vacuum Processes Laboratory of the Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko str., 29/133, 050010, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0003-0116-1423

F.Kh. Tuleutay, Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

Master of Technical Sciences, Junior Researcher of the Vacuum Processes Laboratory of the Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko str., 29/133, 050010, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0003-0802-283X

N. Bakhytuly, Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University

Ph.D, Head of the Laboratory of Physical Methods of Analysis of the Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko str., 29/133, 050010, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0003-3087-0616

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