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Phase relations in PbSe-PbTe alloys of the Ag-Pb-Se-Te system studied by EMF measurements

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Abstract

The emf (E) of Ag | AgI | Ag2GeS3 glass | D galvanic cells (where Ag and D are the electrodes of the cell, D is a three- or four-phase equilibrium alloy of the Ag-Pb-Se-Te system, and AgI | Ag2GeS3 glass is a bilayer membrane with purely ionic (Ag+) conductivity) was measured as a function of temperature in the range 520–575 K. The E(T) data were used to calculate the thermodynamic functions of saturated solid solutions in the PbSe-PbTe section of the Ag-Pb-Se-Te system. The observed breaks in the composition dependences of Δf G 0298 , Δf H 0298 , and TΔr S 0298 and the change in the sign of TΔr S 0298 in the range PbSe0.7Te0.3-PbSe0.73Te0.27 are interpreted as evidence for the formation of an intermediate berthollide phase.

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Authors and Affiliations

  1. National University of Water Management and Nature Resources Use, vul. Soborna 11, Rivne, 33000, Ukraine

    M. V. Moroz

  2. Lviv Polytechnic National University, vul. St. Bandery 12, Lviv, 79000, Ukraine

    M. V. Prokhorenko

Authors
  1. M. V. Moroz
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  2. M. V. Prokhorenko
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Correspondence to M. V. Moroz.

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Original Russian Text © M.V. Moroz, M.V. Prokhorenko, 2015, published in Neorganicheskie Materialy, 2015, Vol. 51, No. 4, pp. 354–358.

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Moroz, M.V., Prokhorenko, M.V. Phase relations in PbSe-PbTe alloys of the Ag-Pb-Se-Te system studied by EMF measurements. Inorg Mater 51, 302–306 (2015). https://doi.org/10.1134/S0020168515040081

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  • DOI: https://doi.org/10.1134/S0020168515040081

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