Ba6−3x Nd8+2x Ti18O54 tungsten bronze: a new high-temperature n-type oxide thermoelectric

Azough, F. et al. (2016) Ba6−3x Nd8+2x Ti18O54 tungsten bronze: a new high-temperature n-type oxide thermoelectric. Journal of Electronic Materials, 45(3), pp. 1894-1899. (doi:10.1007/s11664-015-4275-6)

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Abstract

Semiconducting Ba6−3x Nd8+2x Ti18O54 ceramics (with x = 0.00 to 0.85) were synthesized by the mixed oxide route followed by annealing in a reducing atmosphere; their high-temperature thermoelectric properties have been investigated. In conjunction with the experimental observations, atomistic simulations have been performed to investigate the anisotropic behavior of the lattice thermal conductivity. The ceramics show promising n-type thermoelectric properties with relatively high Seebeck coefficient, moderate electrical conductivity, and temperature-stable, low thermal conductivity; For example, the composition with x = 0.27 (i.e., Ba5.19Nd8.54Ti18O54) exhibited a Seebeck coefficient of S 1000K = 210 µV/K, electrical conductivity of σ 1000K = 60 S/cm, and thermal conductivity of k 1000K = 1.45 W/(m K), leading to a ZT value of 0.16 at 1000 K.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Knox, Professor Andrew and Li, Dr Wenguang and Mullen, Mr Paul and Montecucco, Dr Andrea and Paul, Dr Manosh and Siviter, Dr Jonathan and Han, Dr Guang and Paul, Professor Douglas and Gregory, Professor Duncan
Authors: Azough, F., Freer, R., Yeandel, S. R., Baran, J. D., Molinari, M., Parker, S. C., Guilmeau, E., Kepaptsoglou, D., Ramasse, Q., Knox, A., Gregory, D., Paul, D., Paul, M., Montecucco, A., Siviter, J., Mullen, P., Li, W., Han, G., Man, E. A., Baig, H., Mallick, T., Sellami, N., Min, G., and Sweet, T.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Electronic Materials
Publisher:Springer
ISSN:0361-5235
ISSN (Online):1543-186X
Published Online:30 December 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Journal of Electronic Materials 45(3):1894-1899
Publisher Policy:Reproduced under a Creative Commons License

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