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Neodymium-Strontium Titanate: A New Ceramic for an Old Problem

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Abstract

High density ceramics based on neodymium-calcium titanate (RE0.6II0.1TiO3) where RE = Nd, Pr, Sm and II = Ca, Sr, were prepared by the mixed oxide route. All products exhibited low thermal conductivity due to the presence of A-site vacancies assisting strong phonon scattering. The moderate electrical conductivity and high Seebeck coefficient resulted in the highest thermoelectric figure of merit (ZT) in neodymium-strontium titanate (NT-ST) ceramic with a value of 0.03 at 900 K. The temperature stable ZT behavior of NT-ST is promising for device applications.

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Acknowledgements

We would like to give thanks for the support from the EPSRC through grants EP/I036230 and EP/J000620. We would also like to thank European Thermodynamics LTD and EPSRC for the Industrial CASE award to Samuel S. Jackson.

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Authors and Affiliations

  1. Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M13 9PL, UK

    Samuel S. Jackson, Feridoon Azough & Robert Freer

Authors
  1. Samuel S. Jackson
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  2. Feridoon Azough
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  3. Robert Freer
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Correspondence to Samuel S. Jackson.

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Jackson, S.S., Azough, F. & Freer, R. Neodymium-Strontium Titanate: A New Ceramic for an Old Problem. J. Electron. Mater. 43, 2331–2336 (2014). https://doi.org/10.1007/s11664-014-3058-9

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  • DOI: https://doi.org/10.1007/s11664-014-3058-9

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