Abstract
The effect of lanthanum on the electric and the thermoelectric properties of the ceramic oxide Sr1−x La x TiO3 (where x = 0.0, 0.04, 0.06, 0.08 and 0.12 mole) have been studied. La-doped SrTiO3 was prepared by using the conventional mixed-oxide reaction method. XRD patterns indicated that almost all the La atoms incorporated into the SrTiO3 crystal provided charge carriers. The lattice parameter increases with increasing La doping content. The relative densities of all the samples varied from 89.6% to 94.8%. The electrical conductivity increased with La doping up to 0.08 moles and then decreased as the content of La was increased above 0.08 moles. The thermal conductivity decreased with increasing La content. The largest absolute value of the Seebeck coefficient, 394 μVK−1 at 973 K, was observed at x = 0.04. The Sr0.92La0.08TiO3 sample showed its maximum electrical conductivity at 773 K and its largest ZT value of 0.20 at 973 K.
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Mahmud, I., Yoon, MS., Kim, IH. et al. Thermoelectric properties of the ceramic oxide Sr1−x La x TiO3 . Journal of the Korean Physical Society 68, 35–40 (2016). https://doi.org/10.3938/jkps.68.35
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DOI: https://doi.org/10.3938/jkps.68.35