Neodymium-Strontium Titanate: A New Ceramic
for an Old Problem |
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| Authors: | Samuel S Jackson Feridoon Azough Robert Freer |
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| Affiliation: | 1. Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M13 9PL, UK
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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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