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Open AccessArticle

Investigation into the Effect of Sulfate and Borate Incorporation on the Structure and Properties of SrFeO3-δ

School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
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Academic Editor: Stevin Pramana
Crystals 2017, 7(6), 169; https://doi.org/10.3390/cryst7060169
Received: 28 April 2017 / Revised: 26 May 2017 / Accepted: 3 June 2017 / Published: 7 June 2017
(This article belongs to the Special Issue Crystal Structure of Electroceramics)
In this paper, we demonstrate the successful incorporation of sulfate and borate into SrFeO3-δ, and characterise the effect on the structure and conductivity, with a view to possible utilisation as a cathode material in Solid Oxide Fuel Cells. The incorporation of low levels of sulfate/borate is sufficient to cause a change from a tetragonal to a cubic cell. Moreover, whereas heat treatment of undoped SrFeO3-δ under N2 leads to a transformation to brownmillerite Sr2Fe2O5 with oxygen vacancy ordering, the sulfate/borate-doped samples remain cubic under the same conditions. Thus, sulfate/borate doping appears to be successful in introducing oxide ion vacancy disorder in this system. View Full-Text
Keywords: solid oxide fuel cell; cathode; perovskite; sulfate; borate solid oxide fuel cell; cathode; perovskite; sulfate; borate
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Jarvis, A.; Slater, P.R. Investigation into the Effect of Sulfate and Borate Incorporation on the Structure and Properties of SrFeO3-δ. Crystals 2017, 7, 169.

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Crystals, EISSN 2073-4352, Published by MDPI AG
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