Skip to content

Research at St Andrews

Conductivity and redox stability of perovskite oxide SrFe1-xTixO3-delta (x

Research output: Contribution to journalArticle

Author(s)

Peter I. Cowin, Rong Lan, Christophe T. G. Petit, Shanwen Tao

School/Research organisations

Abstract

A solid solution with the cubic perovskite structure was observed for SrFe1-xTixO3-delta (x = 0-0.3), with an increase in the lattice parameters noted upon increasing dopant concentration. Material stability in air was observed for all compounds, with a decrease in conductivity noted upon increasing dopant concentration attributed to a reduction in charge carrier concentration. A reduction in weight proportional to the titanium content was observed upon exposure to 5% H-2/Ar, although reduction at 700 degrees C was observed to elicit a structural transitions and the formation of a secondary phase for samples SrFeO3-delta and SrFe0.9Ti0.1O3-delta respectively. Conductivity measurements at 600 degrees C demonstrated a larger decrease in the conductivity with increasing dopant concentration, while all investigated oxides are stable after reducing in 5% H-2/Ar at 600 degrees C. It was found that the conductivity of SrFe0.8Ti0.2O3-delta and SrFe0.7Ti0.3O3-delta in 5% H-2/Ar is insufficient to be used as anode for SOFCs. In the investigated compositions, SrFe0.9Ti0.1O3-delta exhibits desired conductivity and redox stability, reduced thermal expansion coefficient compared to SrFeO3-delta, which is a promising redox stable anode for IT-SOFCs. (C) 2015 Elsevier Masson SAS. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalSolid State Sciences
Volume46
Early online date19 May 2015
DOIs
Publication statusPublished - Aug 2015

    Research areas

  • Conductivity, Perovskite, Strontium ferrite, Anode, Solid oxide fuel cell, FUEL-CELLS, ANODE MATERIALS, NEUTRON-DIFFRACTION, MOSSBAUER, CATHODE, SYSTEM, NONSTOICHIOMETRY, ELECTRODES, OXIDATION, CRYSTAL

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

View graph of relations

Related by journal

  1. Structure and conductivity of praseodymium and yttrium co-doped barium cerates

    Petit, C. T. G. & Tao, S., Mar 2013, In : Solid State Sciences. 17, p. 115-121 7 p.

    Research output: Contribution to journalArticle

  2. Crystallographic, magnetic and dielectric studies of the potential multiferroic cryolite (NH4)3FeF6

    Goff, R. J., Tang, C. C., Parker, J. E., Morrison, F. D. & Lightfoot, P., May 2011, In : Solid State Sciences. 13, 5, p. 953-958 6 p.

    Research output: Contribution to journalArticle

  3. Fluoroaluminates of purine and DNA bases, adenine, guanine: [Hpur](2)center dot(AlF5), [Hade](3)center dot(AlF6)center dot 6.5H(2)O, [Hguan](3)center dot(Al3F12)

    Cadiau, A., Adil, K., Hemon-Ribaud, A., Leblanc, M., Jouanneaux, A., Slawin, A. M. Z., Lightfoot, P. & Maisonneuve, V., Jan 2011, In : Solid State Sciences. 13, 1, p. 151-157 7 p.

    Research output: Contribution to journalArticle

  4. The ionothermal synthesis of metal organic frameworks, Ln(C9O6H3) ((CH3NH)2CO)2 , using deep eutectic solvents

    Himeur, F. H., Stein, I., Wragg, D. S., Slawin, A. M. Z., Lightfoot, P. & Morris, R. E., Apr 2010, In : Solid State Sciences. 12, 4, p. 418-421 4 p.

    Research output: Contribution to journalArticle

ID: 243433180

Top