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Materials Processing Fundamentals: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS Materials Processing and Manufacturing Division, TMS: Process Technology and Modeling Committee
Program Organizers: Samuel Wagstaff, Oculatus Consulting; Allie Anderson, RHI Magnesita; Jonghyun Lee, Iowa State University; Adrian Sabau, Oak Ridge National Laboratory; Fiseha Tesfaye, Metso Metals Oy, Åbo Akademi University

Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center

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F-33: Phase Equilibria in the Ag–Ge–Bi–Te System and Thermodynamic Properties of the nGeTe×mBi₂Te₃ (n, m = 1-4) Layered Compounds: Mykola Moroz¹; Fiseha Tesfaye²; Pavlo Demchenko³; Myroslava Prokhorenko⁴; Orest Pereviznyk³; Bohdan Rudyk¹; Lyudmyla Soliak¹; Daniel Lindberg⁵; OLeksandr Reshetnyak³; Leena Hupa²; ¹National University of Water and Environmental Engineering; ²Åbo Akademi University; ³Ivan Franko National University of Lviv; ⁴Lviv Polytechnic National University; ⁵Aalto University
    Phase equilibria of the Ag–Ge–Bi–Te system in the part GeTe–Ag8GeTe6–Te–Bi2Te3 (I) were established by means of electrochemical investigation and characterization techniques. It was shown that the concentration space of (I) consists 8 four-phase regions, formed with the participation of the layered compounds of the nGeTe×mBi2Te3 (n, m = 1-4) homologous range, as well as Ag8GeTe6, Bi2Te3, and Te. Equations of potential-forming reactions were written for each region. Reactions were performed in the following electrochemical cells (ECCs) (−)IE | Ag | SE | PE | IE(+), where IE is the inert electrode, Ag is the negative electrode, SE is the solid-state Ag+ ion conducting electrolyte, and PE is the positive electrode. PEs of ECCs were prepared from finely ground mixtures of the elements. The measured EMF vs temperature values of ECCs were used to calculate the standard thermodynamic functions of intermetallic compounds in (I).

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