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arXiv · 1107.2530

High-temperature oxide thermoelectrics

Ichiro Terasaki
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Abstract

We have evaluated the power factor of transition metal oxides at high temperatures using the Heikes formula and the Ioffe-Regel conductivity. The evaluated power factor is found to be nearly independent of carrier concentration in a wide range of doping, and well explains the experimental data for cobalt oxides. This suggests that the same power factor can be obtained with a thermopower larger than $2k_B/e$, and also suggests a reasonably high value of the dimensionless figure of merit $ZT$. We propose an oxide thermoelectric power generator by using materials having a thermopower larger than 300 $μ$V/K.

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Ichiro Terasaki. 2011-07-13. High-temperature oxide thermoelectrics. https://doi.org/10.1063/1.3626459

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