Thermoelectric Properties of Chevrel-Type Sulfides AMo_6S_8 (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)

坪田 敏樹, 大瀧 倫卓, 江口 浩一

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Thermoelectric properties of Chevrel-type sulfides AMo_6S_8 (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 10^2.5S・cm^<-1><10^3S・cm^<-1> for most of the samples from room temporature to 1000℃; AgMo_6S_8 gave the largest σ up to 250℃. The Seebeck coefficient, S, was positive for all the samples, indicating the p-type conduction. All the S values were 10μV・K^<-1><S<80μV・K^<-1>and AgMo_6S_8 showed smallest S, probably owing to the higher hole concentration for A=Ag compared to other samples. The maximum S^2σ value was attained by SnMo_6S_8, reaching ca. 1.7×10^<-4> W・m^<-1.>K^<-2> at 800℃. All the k values were 1 W・m^<-1.>K^<-1><κ<3W・m^<-1.>K^<-1> from room temperature to 1000℃. The maximum Z value was ca. 0.07×10^<-3>K^<-1> attained by SnMo_6S_8 at 800℃.
    Translated title of the contributionシェブレル型硫化物AMo_6S_8(A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)の熱電特性
    Original languageEnglish
    Pages (from-to)697-701
    Number of pages5
    Journal日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi
    Volume107
    Issue number1248
    DOIs
    Publication statusPublished - Aug 1 1999

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