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Research at St Andrews

Studies on the perovskite-based La4Srn-4TinO3n+2.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

J Canales-Vazquez, S Tao, M Patrakeev, JTS Irvine, WB Zhou, J Frade

School/Research organisations

Abstract

Perovskite titanates with nominal stoichiometry ABO(3+delta) are frequently reported in SOFC literature as having O-3 stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La4Srn-4TinO3n+2. The layered structure is lost for the n=12 member (La4Sr8Ti12O38-delta), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. Ibis compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.

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Details

Original languageEnglish
Title of host publicationMATERIALS AND TECHNOLOGY FOR HYDROGEN ECONOMY
EditorsGA Nazri, M Nazri, R Young, P Chen
Place of PublicationWARRENDALE
PublisherMATERIALS RESEARCH SOCIETY
Pages211-216
Number of pages6
ISBN (Print)1-55899-739-3
Publication statusPublished - 2004
EventSymposium on Materials and Technology for Hydrogen Economy held at the 2003 MRS Fall Meeting - Boston, Morocco
Duration: 1 Dec 20033 Dec 2003

Publication series

NameMATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS
PublisherMATERIALS RESEARCH SOCIETY
Volume801
ISSN (Print)0272-9172

Conference

ConferenceSymposium on Materials and Technology for Hydrogen Economy held at the 2003 MRS Fall Meeting
Country/TerritoryMorocco
CityBoston
Period1/12/033/12/03

    Research areas

  • ANODES, FUEL-CELLS

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