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TEMPERATURE DEPENDENCE OF HEAT CAPACITY AND CHANGES IN THERMODYNAMIC FUNCTIONS OF ALLOYS OF THE Pb – Te SYSTEM

https://doi.org/10.57070/2304-4497-2022-4(42)-3-10

Abstract

Lead, in comparison with other metals, has low chemical activity and high corrosion resistance. Complex alloying of lead with antimony, tellurium and copper in optimal concentrations made it possible to obtain highly effective alloys for protective cable sheaths. Pb – Sb – Cu – Te lead alloy provides the cable sheath with high resistance to fatigue, creep and active deformation in a wide temperature range, as well as good manufacturability. The basis for such a complex of positive characteristics is a specific fine-grained thermostable structure, which determines the stability of properties in operation. Alloys of this composition are at the level of world standards: they have the best complex of operational and technological characteristics compared to the most promising domestic and foreign analogues. In the work, the heat capacity of the alloys of the Rb – Te system was determined in the "cooling" mode by the known heat capacity of a reference sample made of copper grade M00. Polynomials describing the temperature dependence of the heat capacity and changes in the thermodynamic functions of alloys are obtained. It is found that with increasing temperature and tellurium content, the heat capacity, enthalpy and entropy of lead increase slightly, and the Gibbs energy values decrease.

About the Authors

Saidmiri Khudoiberdizoda
Centre for Innovative Development of Science and New Technologies at the National Academy of Sciences of Tajikistan
Tajikistan

Senior Researcher



Izatullo Ganiev
head of the laboratory,V.I. Nikitin Institute of Chemistry of the National Academy of Sciences of Tajikistan
Tajikistan

Academician at NAST, doctor of chemical sciences, professor



Bakhtier Eshov
State Scientific Institution “Center of Innovation Development of Science and New Technologies” of the Academy of Sciences of the Republic of Tajikistan
Tajikistan

Doctor of Engineering Science, associate lecturer, director



Nukra Mulloeva
State Scientific Institution “Center of Innovation Development of Science and New Technologies” of the Academy of Sciences of the Republic of Tajikistan

 Candidate of Chemical Sciences, head of the laboratory



Sukhrob Otadzhonov,
Khujand State University named after Academician B. Gafurov

Senior lecturer of the Department of General Physics and Solid State



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For citations:


Khudoiberdizoda S., Ganiev I., Eshov B., Mulloeva N., Otadzhonov, S. TEMPERATURE DEPENDENCE OF HEAT CAPACITY AND CHANGES IN THERMODYNAMIC FUNCTIONS OF ALLOYS OF THE Pb – Te SYSTEM. Bulletin of the Siberian State Industrial University. 2022;(4):3-10. (In Russ.) https://doi.org/10.57070/2304-4497-2022-4(42)-3-10

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ISSN 2304 - 4497 (Print)
ISSN 2307-1710 (Online)