Effect of non-stoichiometry on the thermal and electrical properties of polycrystalline PtSb2 at low temperature

Spencer L. Waldrop, Donald T. Morelli

    Research output: Contribution to journalArticle

    Abstract

    In narrow bandgap materials non-stoichiometry can dramatically change the measured electrical and thermal properties below room temperature. The work here attempts to examine the effects of non-stoichiometry on the low temperature properties of polycrystalline PtSb2. It was found that at antimony deficiencies of only 1% a change in the sign of the Seebeck coefficient was observed from 80 to 120 K. Further reduction of the antimony content resulted in a negative Seebeck for all temperatures measured. Antimony excess was found to retain positive values in the Seebeck coefficient, but with a reduction in the magnitude. The electrical resistivity was found to vary largely at low temperature, however converged to similar values at room temperature. These results show the importance of stoichiometry in narrow bandgap materials at low temperature.

    Original languageEnglish (US)
    Pages (from-to)23-26
    Number of pages4
    JournalJournal of Alloys and Compounds
    Volume701
    DOIs
    StatePublished - Apr 15 2017

    Profile

    Temperature
    Acetanilides
    Antimony
    Seebeck coefficient
    Electric properties
    Energy gap
    Thermodynamic properties
    Ageusia
    Computing Methodologies
    Traffic Accidents
    Low temperature properties
    Stoichiometry
    Dandy-Walker Syndrome

    Keywords

    • Thermoelectric materials

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

    Cite this

    Effect of non-stoichiometry on the thermal and electrical properties of polycrystalline PtSb2 at low temperature. / Waldrop, Spencer L.; Morelli, Donald T.

    In: Journal of Alloys and Compounds, Vol. 701, 15.04.2017, p. 23-26.

    Research output: Contribution to journalArticle

    Waldrop, Spencer L.; Morelli, Donald T. / Effect of non-stoichiometry on the thermal and electrical properties of polycrystalline PtSb2 at low temperature.

    In: Journal of Alloys and Compounds, Vol. 701, 15.04.2017, p. 23-26.

    Research output: Contribution to journalArticle

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