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Abstract <p>The thermodynamic properties of a high-temperature (HT) modification of Ag<sub>8</sub>SiSe<sub>6</sub> and solid solutions Ag<sub>8</sub>Si<sub>1 –</sub> <sub><i>x</i></sub>Sn<sub><i>x</i></sub>Se<sub>6</sub> are studied using the EMF method with the solid Ag<sup>+</sup>-conducting electrolyte Ag<sub>4</sub>RbI<sub>5</sub>. Based on the EMF measurements of concentration cells such as</p> <p><InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\left( {-} \right){\text{Ag}}\left( {\text{s}} \right)\left| {{\text{A}}{{{\text{g}}}_{{\text{4}}}}{\text{Rb}}{{{\text{I}}}_{{\text{5}}}}\left( {\text{s}} \right)} \right|\left( {{\text{Ag}{-}\text{in alloy}}} \right)\left( + \right)\,\,\,\,\,\,\,\,\,(1)\)</EquationSource> <!--ElChem2570021Aslanly-m1--> </InlineEquation></p> <p>the linear equations for the temperature dependence of EMF are obtained in the temperature interval of 300–450&#xa0;К and the partial thermodynamic functions of silver in alloys are calculated. Based on the data on solid-state equilibria in the system Ag–Si–Sn–Se, the equations for the potential-generating reactions responsible for these partial molar functions are obtained and the integral thermodynamic functions of formation and entropy are calculated for the HT-Ag<sub>8</sub>SiSe<sub>6</sub> and solid solutions with a composition <i>x</i> = 0.2, 0.4, 0.6, and 0.8.</p>

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Thermodynamic Properties of a High-Temperature Ag8SiSe6 Modification and Ag8Si1 – xSnxSe6 Solid Solutions Studied by the EMF Method with Solid Electrolyte

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • S. R. Aslanli,
  • S. Z. Imamaliyeva,
  • G. M. Ashirov,
  • I. J. Alverdiyev,
  • Yu. A. Yusibov,
  • M. B. Babanly

摘要

Abstract

The thermodynamic properties of a high-temperature (HT) modification of Ag8SiSe6 and solid solutions Ag8Si1 – xSnxSe6 are studied using the EMF method with the solid Ag+-conducting electrolyte Ag4RbI5. Based on the EMF measurements of concentration cells such as

\(\left( {-} \right){\text{Ag}}\left( {\text{s}} \right)\left| {{\text{A}}{{{\text{g}}}_{{\text{4}}}}{\text{Rb}}{{{\text{I}}}_{{\text{5}}}}\left( {\text{s}} \right)} \right|\left( {{\text{Ag}{-}\text{in alloy}}} \right)\left( + \right)\,\,\,\,\,\,\,\,\,(1)\)

the linear equations for the temperature dependence of EMF are obtained in the temperature interval of 300–450 К and the partial thermodynamic functions of silver in alloys are calculated. Based on the data on solid-state equilibria in the system Ag–Si–Sn–Se, the equations for the potential-generating reactions responsible for these partial molar functions are obtained and the integral thermodynamic functions of formation and entropy are calculated for the HT-Ag8SiSe6 and solid solutions with a composition x = 0.2, 0.4, 0.6, and 0.8.