Abstract
The thermoelectric properties of the Ag-doped ceramics Y1−x Ag x BaCo4O7+δ (x = 0.0, 0.05, 0.1, 0.15, and 0.2) were investigated from 373 K to 973 K. The results show that the do** of Ag can reduce the electrical resistivity. The Seebeck coefficients of the samples decrease when the Ag do** amount is small, but increase when the Ag do** amount is large. The activation energy of the electrical conductivity was calculated using Arrhenius plots, and it was found that the activation energy descends with increase of the Ag do** amount. According to the power factors, the optimum Ag do** amount is x = 0.15, which results in a higher power factor of 81 μW m−1 K−2 at 973 K, 72.7% higher than for the sample without Ag do**.
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He, Q.L., Zhang, J., Gao, F. et al. Thermoelectric Properties of Y1−x Ag x BaCo4O7+δ Ceramics. J. Electron. Mater. 42, 2570–2573 (2013). https://doi.org/10.1007/s11664-013-2631-y
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DOI: https://doi.org/10.1007/s11664-013-2631-y