Skip to content

Research at St Andrews

Influence of Yttria concentration upon Electrical Properties and Susceptibility to Ageing of Yttria-stabilised Zirconia

Research output: Contribution to journalArticle

Author(s)

IR Gibson, GP Dransfield, John Thomas Sirr Irvine

School/Research organisations

Abstract

The most widely used electrolyte in solid oxide fuel cell (SOFC) devices is 8 mol% yttria-stablished zirconia (YSZ). Recent investigations have questioned the long term stability of this material at both the SOFC operating temperature of 1000 degrees C and during cycling between room temperature and 1000 degrees C. One possible method of improving the stability is by increasing the yttria concentration. Previous studies, utilising a number of different commercial YSZ powders have suggested that this may be possible, however, there were other differences between the samples in addition to yttria-content, notably impurity concentration. Thus the importance of yttria concentration has not been unambiguously demonstrated and the optimal content of yttria has not been determined In this study, the mechanical strength and ionic conductivity of a range of ultra-pure compositions from the (ZrO2)(1-x)(Y2O3)(x) system close to 8 mol% yttria-stabilised zirconia, x = 0.08, have been investigated. 8.5 mol% YSZ was found to have comparable mechanical strength and ionic conductivity to conventional 8 mol% YSZ, but showed improved stability. On ageing at typical fuel cell operating temperatures, i.e. 1000 degrees C, the conductivity of samples with yttria contents of 8.5 mol%, or higher, changed little; however, conductivity values for compositions with lower yttria contents decreased by 10-15%. These results strongly suggest that optimal properties are obtained for the minimum yttrium composition required to fully stabilise the cubic polymorph at the temperature of operation. (C) 1998 Elsevier Science Limited. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)661-667
Number of pages7
JournalJournal of the European Ceramic Society
Volume18
Publication statusPublished - 1998

    Research areas

  • SOLID ELECTROLYTES, CONDUCTIVITY

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Lattice strain-enhanced exsolution of nanoparticles in thin films

    Han, H., Park, J., Nam, S. Y., Choi, G. M., Parkin, S. S. P., Jang, H. M. & Irvine, J. T. S., 1 Dec 2019, In : Nature Communications. 10, 8 p., 1471.

    Research output: Contribution to journalArticle

  2. Hexagonal perovskite related oxide ion conductor Ba3NbMoO8.5: phase transition, temperature evolution of the local structure and properties

    Chambers, M. S., McCombie, K. S., Auckett, J. E., McLaughlin, A. C., Irvine, J. T. S., Chater, P. A., Evans, J. S. O. & Evans, I. R., 28 Nov 2019, In : Journal of Materials Chemistry. 7, 44, p. 25503-25510 8 p.

    Research output: Contribution to journalArticle

  3. Oxygen storage capacity and thermal stability of brownmillerite-type Ca2(Al1-xGax)MnO5+δ oxides

    Huang, X., Ni, C. & Irvine, J. T. S., 25 Nov 2019, In : Journal of Alloys and Compounds. 810, 151865.

    Research output: Contribution to journalArticle

  4. Nanostructured carbons containing FeNi/NiFe2O4 supported over N-doped carbon nanofibers for oxygen reduction and evolution reactions

    Aziz, I., Lee, J. G., Duran, H., Kirchhoff, K., Baker, R. T., Irvine, J. T. S. & Arshad, S. N., 11 Nov 2019, In : RSC Advances. 9, 63, p. 36586-36599 14 p.

    Research output: Contribution to journalArticle

  5. B-site doped perovskite ferrate for efficient anode of a solid oxide fuel cell with in situ metal exsolution

    Ni, C., Zeng, Q., He, D., Peng, L., Xie, D-T., Irvine, J., Duan, S. & Ni, J-P., 29 Oct 2019, In : Journal of Materials Chemistry. In press

    Research output: Contribution to journalArticle

Related by journal

  1. Journal of the European Ceramic Society (Journal)

    Finlay Morrison (Reviewer)
    2008 → …

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Related by journal

  1. Scaling up aqueous processing of A-site deficient strontium titanate for SOFC anode supports

    Verbraeken, M. C., Sudireddy, B. R., Vasechko, V., Cassidy, M., Ramos, T., Malzbender, J., Holtappels, P. & Irvine, J. T. S., Apr 2018, In : Journal of the European Ceramic Society. 38, 4, p. 1663-1672

    Research output: Contribution to journalArticle

  2. LSCM-(YSZ-CGO) composites as improved symmetrical electrodes for solid oxide fuel cells

    Irvine, J. T. S., Ruiz-Morales, JC., Canales-Vasquez, J., Ballesteros-Perez, B., Pena-Marinez, J., Marrero-Lopez, D. & Nunez, P., 2007, In : Journal of the European Ceramic Society. 27, p. 4223-4227 5 p.

    Research output: Contribution to journalArticle

  3. Novel high capacitance materials: BaTiO3 : La and CaCu3Ti4O12

    West, AR., Adams, TB., Morrison, F. D. & Sinclair, DC., 2004, In : Journal of the European Ceramic Society. 24, 6, p. 1439-1448 10 p.

    Research output: Contribution to journalArticle

ID: 196385

Top