Thermoelectric Properties of Chevrel-Type Sulfides AMo6S8. (A = Fe, Ni, Ag, Zn, Sn, Pb, Cu).

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