シェブレル型硫化物AMo<sub>6</sub>S<sub>8</sub> (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu) の熱電特性

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  • 坪田 敏樹
    九州大学大学院総合理工学研究科物質理工学専攻 九州大学大学院工学研究科材料物性工学専攻
  • 大瀧 倫卓
    九州大学大学院総合理工学研究科物質理工学専攻
  • 江口 浩一
    九州大学大学院総合理工学研究科物質理工学専攻

書誌事項

タイトル別名
  • Thermoelectric Properties of Chevrel-Type Sulfides AMo6S8. (A = Fe, Ni, Ag, Zn, Sn, Pb, Cu).
  • Thermoelectric Properties of Chevel-Type Sulfides AMo6S8(A=Fe,Ni,Ag,Zn,Sn,Pb,Cu)

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説明

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 102.5S·cm-1<σ<103S·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 10μV·K-1<S<80μV·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. 1.7×10-4W·m-1·K-2 at 800°C. All the κ values were 1W·m-1·K-1<κ<3W·m-1·K-1 from room temperature to 1000°C. The maximum Z value was ca. 0.07×10-3K-1 attained by SnMo6S8 at 800°C.

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