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Sensing of sulfur in molten metal using strontium β-alumina

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Abstract

A sulfur sensor based upon strontium β-alumina solid electrolyte was developed and tested in molten iron. The strontium β-alumina electrolyte was fabricated using an injection molding process and optimized for thermal shock resistance and toughness by incorporating up to 20 wt pct partially stabilized zirconia. A mixture of molybdenum and molybdenum sulfide was used as the reference electrode, while SrS, allowed to form in situ during the sensing of sulfur, formed the auxiliary electrode. The sensor behavior in terms of response time, lifetime to failure, and possible reaction mechanisms is discussed in this article. The results were in very good agreement with combustion analysis by conventional LECO.

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Author notes

  1. M. A. Swetnam

    Present address: the Department of Materials Science and Metallurgy, University of Cambridge, is with 1limited, St. John’s Innovation Centre, CB4 0WS, Cambridge, United Kingdom

Authors and Affiliations

  1. the Department of Materials Science and Metallurgy, University of Cambridge, CB2 3QZ, Cambridge, United Kingdom

    R. V. Kumar (Senior Lecturer) & D. J. Fray (Professor)

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  1. M. A. Swetnam
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  2. R. V. Kumar
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  3. D. J. Fray
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Swetnam, M.A., Kumar, R.V. & Fray, D.J. Sensing of sulfur in molten metal using strontium β-alumina. Metall Mater Trans B 37, 381–388 (2006). https://doi.org/10.1007/s11663-006-0022-y

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  • DOI: https://doi.org/10.1007/s11663-006-0022-y

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