SPS-assisted preparation of the Magnéli phase WO2.90 for thermoelectric applications

Gregor Kieslich; Christina S. Birkel; Jason E. Douglas; Michael Gaultois; Igor Veremchuk; Ram Seshadri; Galen D. Stucky; Yuri Grin; Wolfgang Tremel

doi:10.1039/C3TA12145C

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SPS-assisted preparation of the Magnéli phase WO_2.90 for thermoelectric applications†

Gregor Kieslich,^ad Christina S. Birkel,‡^b Jason E. Douglas,^b Michael Gaultois,^b Igor Veremchuk,^c Ram Seshadri,^b Galen D. Stucky,^b Yuri Grin*^c and Wolfgang Tremel*^a

Author affiliations

* Corresponding authors

^a Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany
E-mail: tremel@uni-mainz.de

^b Department of Chemistry and Biochemistry, University of California-25 Santa Barbara, Santa Barbara, California, USA

^c Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
E-mail: grin@cpfs.mpg.de

^d Graduate School Materials Science in Mainz, Staudinger Weg 9, D-55128 Mainz, Germany

Abstract

We describe the preparation and simultaneous consolidation of WO_2.90 by spark plasma sintering (SPS). SPS allows for the direct manufacturing of large amounts of consolidated material. Synchrotron powder X-ray diffraction indicates that the material is single phase. Microstructure analysis indicates that the pellet is fully dense, allowing high-temperature thermoelectric properties to be reliably measured. The as-prepared samples of WO_2.90 reach a ZT of 0.1 at 1100 K.

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Article information

DOI: https://doi.org/10.1039/C3TA12145C
Article type: Communication
Submitted: 02 Jun 2013
Accepted: 30 Jul 2013
First published: 07 Aug 2013

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J. Mater. Chem. A, 2013,1, 13050-13054

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SPS-assisted preparation of the Magnéli phase WO_2.90 for thermoelectric applications

G. Kieslich, C. S. Birkel, J. E. Douglas, M. Gaultois, I. Veremchuk, R. Seshadri, G. D. Stucky, Y. Grin and W. Tremel, J. Mater. Chem. A, 2013, 1, 13050 DOI: 10.1039/C3TA12145C

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Journal of Materials Chemistry A