Abstract
The thermoelectric properties of the n-type Sr deficient polycrystalline SrTiO3 singly or co-doped with Dy and Nb were systematically investigated. The Nb doped samples prepared in forming gas have a solubility limit at about 20 at% against 8 at% of Dy. All prepared samples have metallic behavior of the electrical conductivity above 300°C. The Nb doped samples can reach a high value of electrical conductivity comparable to early reported [5] La-doped ones, however Dy doped samples have a lower thermal conductivity. The behavior of the Seebeck coefficient of Nb and Dy singly doped samples as a function of doping concentration is the same. The containing 4 at% Dy sample heavily co-doped with Nb has a lower thermal conductivity while keeping a high value of electrical conductivity. The highest value of the dimension less figure of merit is about 0.24 at 1273K for the co-doped sample with 4 at% Dy and 20 at% Nb.
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Tinh, N.T., Tsuji, T. (2009). Thermoelectric Properties of Heavily Doped Polycrystalline SrTiO3 . In: Cat, D.T., Pucci, A., Wandelt, K. (eds) Physics and Engineering of New Materials. Springer Proceedings in Physics, vol 127. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-88201-5_24
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DOI: https://doi.org/10.1007/978-3-540-88201-5_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-88200-8
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