Skip to content

Research at St Andrews

Oxide Ion Transport in Highly Defective Cubic Stabilized Zirconias

Research output: Contribution to journalArticle

Author(s)

J. T. S. Irvine, I. R. Gibson, D. P. Fagg

School/Research organisations

Abstract

Ac impedance spectroscopy and neutron powder diffraction have been used to study the high temperature behaviour of defective fluorite solid electrolytes. In yttria-stabilised zirconia with an yttrium content of 15 mol% YO1.5 there is a marked change in conductivity behaviour at around 650 degrees C, with a decrease in activation energy of 0.15 eV. Structural studies confirm that this is due to a change in the bulk of the sample with the disappearance of diffuse scattering peaks and marked changes in the behaviour of the isotropic temperature factors at the same temperature. These results indicate that the change in activation energy of yttria-stabilised zirconia at 650 degrees C is due to an order-disorder transition involving local defect dusters. In studies of zirconia co-doped with yttrium and niobium, activation energy fox conduction is found to rapidly increase with the concentration of the trivalent yttrium Saturation doping is reached at about 20-30 % of yttrium and activation energy only increases slightly with doping. Introduction of pentavalent niobium at this level of doping serves to decrease activation energy, although it also decreases conductivity slightly. The low and high temperature activation energies converge as the saturation regime is approached. These observations seem to suggest that ordering of defect clusters into microdomains increases activation energy for ionic motion. At low defect concentrations and high temperatures, this local ordering breaks down and the activation energy for conduction decreases.

Close

Details

Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalIonics
Volume1
Issue number4
Publication statusPublished - Jul 1995

    Research areas

  • FLUORITE OXIDES, X-RAY-DIFFRACTION, CRYSTAL, ZR(CA,Y)O2-X, NEUTRON-SCATTERING, TEMPERATURE

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

View graph of relations

Related by author

  1. An FeNbO4-based oxide anode for a solid oxide fuel cell (SOFC)

    Liu, X., Xie, D., Irvine, J. T. S., Ni, J. & Ni, C., 11 Jan 2020, In : Electrochimica Acta. In press, 135692.

    Research output: Contribution to journalArticle

  2. Oxygen redox activity through a reductive coupling mechanism in the P3-type nickel-doped sodium manganese oxide

    Kim, E. J., Ma, L. A., Duda, L. C., Pickup, D. M., Chadwick, A. V., Younesi, R., Irvine, J. T. S. & Armstrong, R., 6 Jan 2020, In : ACS Applied Energy Materials. Early View

    Research output: Contribution to journalArticle

  3. A 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., Irvine, J. T. S., Duan, S. & Ni, J., 21 Dec 2019, In : Journal of Materials Chemistry A. 7, 47, p. 26944-26953 10 p.

    Research output: Contribution to journalArticle

  4. 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

  5. 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

Related by journal

  1. Robust doped BaCeO3-δ electrolyte for IT-SOFCs

    Khan, M. N., Azad, A. K., Savaniu, C. D., Hing, P. & Irvine, J. T. S., Sep 2017, In : Ionics. 23, 9, p. 2387-2396 10 p.

    Research output: Contribution to journalArticle

  2. Carbon-air fuel cell development to satisfy our energy demands

    Irvine, J. T. S., Jain, SL., Lakeman, B. & Pointon, KD., Dec 2007, In : Ionics. 13, p. 413 - 416 4 p.

    Research output: Contribution to journalArticle

  3. Thermomechanical and conductivity studies of doped niobium titanates as possible current collector material in the SOFC anode

    Lashtabeg, A., Irvine, J. T. S. & Feighery, AJ., 2003, In : Ionics. 9, p. 220-226 7 p.

    Research output: Contribution to journalArticle

  4. Characterisation of Novel Anodes for Solid Oxide Fuel Cells Based on Oxygen-Excess Perovskite Related Structures

    Canales-Vázquez, J., Zhou, W. & Irvine, J. T. S., 2002, In : Ionics. 8, p. 252-255

    Research output: Contribution to journalArticle

  5. Preparation of Thin Films Using the Tape-Casting Process for Use in the Solid Oxide Fuel Cell

    Jones, F. G. E. & Irvine, J. T. S., Sep 2002, In : Ionics. 8, 5-6, p. 339-343 5 p.

    Research output: Contribution to journalArticle

ID: 47289794

Top