Thermoelectric properties of chevrel-type sulfides AMo6S8 (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)

Toshiki Tsubota, Michitaka Ohtaki, Koichi Eguchi

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    Abstract

    Thermoelectric properties of Chevrel-type sulfides AMo6S8 (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu) were investigated with respect to many advantageous characteristics of the Chevrel compounds for thermoelectric applications. The electrical conductivity, σ, was 102.5 S·cm-1<σ<103 S·cm-1 for most of the samples from room temperature to 1000°C; AgMo6S8 gave the largest σ up to 250°C. The Seebeck coefficient, S, was positive for all the samples, indicating the p-type conduction. All the S values were 10 μV·K-1<S<80 μV· K-1, and AgMo6S8 showed the smallest S, probably owing to the higher hole concentration for A=Ag compared to other samples. The maximum S2σ value was attained by SnMo6S8, reaching ca. 1.7 × 10-4 W·m-1· K-2 at 800°C. All the κ values were 1 W·m-1·K-1<κ<3 W·m-1·K-1 from room temperature to 1000°C. The maximum Z value was ca. 0.07 × 10-3 K-1 attained by SnMo6S8 at 800°C.

    Original languageEnglish
    Pages (from-to)697-701
    Number of pages5
    JournalJournal of the Ceramic Society of Japan
    Volume107
    Issue number8
    DOIs
    Publication statusPublished - Jan 1 1999

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    All Science Journal Classification (ASJC) codes

    • Ceramics and Composites
    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

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