The effect of Cation substitution on chemical stability of Ba 0.5Sr0.5Co0.8Fe0.2O 3-δ-based mixed conductors

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Abstract

Cubic perovskite Ba0.5Sr0.5Co0.8Fe 0.1R0.1O3-δ (R=Fe, Nb, Mo, Sb) was synthesized, and the chemical stability under high oxygen partial pressure (p(O2)) was studied by using HT-XRD in the temperature range of 773-1373 K. It was found that Ba0.5Sr0.5Co 0.8Fe0.1Sb0.1O3-δ was remarkably stable than Ba0.5Sr0.5Co0.8Fe 0.2O3-δ and Ba0.5Sr0.5Co 0.8Fe0.1Mo0.1O3-δ in high p(O2) condition. The effect of B-site substitution on the CO2- tolerance of Ba0.5Sr0.5Co0.8Fe 0.1R0.1O3-δ was also investigated by TG-DTA analysis at 300-1373 K. It was demonstrated that the chemical stability of Ba0.5Sr0.5Co0.8Fe0.2O 3-δ against CO2 could be significantly improved when Fe were partially substituted by Nb or Sb ions.

Original languageEnglish
Pages (from-to)2041-2049
Number of pages9
JournalECS Transactions
Volume57
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1

ASJC Scopus subject areas

  • Engineering(all)

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