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Issue 4, 2010
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Thermoelectric properties of n-type double substituted SrTiO3 bulk materials

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Abstract

A series of La, Ta double substituted Sr1−xLaxTi1−xTaxO3, with x = 0.01, 0.05 and 0.10, and La, Nb double substituted Sr0.90La0.10Ti0.90Nb0.10O3 for comparison were investigated in this project. Rietveld refinements were performed to check for purity and symmetry reduction. Electronic structure calculations indicate n-type conduction with steep and flat bands in the vicinity of the Fermi level for x = 0.125. Seebeck coefficient, electrical conductivity, and thermal conductivity measurements on hot-pressed and spark-plasma-sintered samples were performed over a wide range of temperatures. Best results were obtained by spark-plasma-sintering of double substituted Sr0.99La0.01Ti0.99Ta0.01O3 with a thermoelectric figure-of-merit of 0.13 at 660 K.

Graphical abstract: Thermoelectric properties of n-type double substituted SrTiO3 bulk materials

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Publication details

The article was received on 15 Jul 2009, accepted on 11 Sep 2009 and first published on 28 Sep 2009


Article type: Paper
DOI: 10.1039/B913799H
Citation: Dalton Trans., 2010,39, 1031-1035
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    Thermoelectric properties of n-type double substituted SrTiO3 bulk materials

    Y. Cui, J. He, G. Amow and H. Kleinke, Dalton Trans., 2010, 39, 1031
    DOI: 10.1039/B913799H

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