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High-temperature phase relations and thermodynamics in the silver-tin-sulfur system

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Abstract

The SnS activities in liquid Ag2S-SnS liquid mattes were obtained at 1100 °C and 1200 °C by the dew-point method. Negative deviations were observed, and the liquid matte solutions were modeled by the Wilson equations. Part of the liquid boundaries of the Ag2S-SnS phase diagram were derived from the model equations, yielding a eutectic temperature of 528 °C at x SnS=0.38. The phase diagram of the pseudobinary Ag2S-SnS was also verified experimentally by quenching samples equilibrated in evacuated and sealed silica capsules. Solubility limits of the components at the narrow-terminal solid-solution ranges were determined around the eutectic temperature. Within the Ag-Sn-S ternary system, the boundaries of the immiscibility region, together with the tie-line distributions, were established at 1200 °C. Activities of Ag, Sn, and S along the miscibility gap were calculated by utilizing the bounding binary thermodynamics, phase equilibria, and tie-lines.

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Author notes

  1. R. Hürman Eriç (Visiting Professor, Professor and Head) & Gokhan Akbay (Postgraduate Student, Lieutenant)

    Present address: Faculty of Applied Earth Sciences, Delft University of Technology, 2628, RX Delft, The Netherlands

Authors and Affiliations

  1. School of Process and Materials Engineering, University of Witwatersand, Private Bag 3, WITS, 2050, Johannesburg, South Africa

    R. Hürman Eriç (Visiting Professor, Professor and Head)

  2. Turkish Army, Ankara, Turkey

    Gokhan Akbay (Postgraduate Student, Lieutenant)

Authors
  1. R. Hürman Eriç
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  2. Gokhan Akbay
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Eriç, R.H., Akbay, G. High-temperature phase relations and thermodynamics in the silver-tin-sulfur system. Metall Mater Trans B 30, 707–714 (1999). https://doi.org/10.1007/s11663-999-0032-7

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  • DOI: https://doi.org/10.1007/s11663-999-0032-7

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