Microstructure and CO2-absorption in Sr0.95Ca0.05Co0.5Fe0.5 O3-δ and Sr0.5Ca0.5Co0.5Fe0.5 O3-δ as studied by emission mössbauer spectroscopy

Z. Homonnay, K. Nomura, G. Juhász, E. Kuzmann, S. Hamakawa, T. Hayakawa, A. Vértes

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Sr0.95Ca0.05Fe0.5Co0.5 O3-δ and Sr0.5Ca0.5Fe0.5Co0.5 O3-δ perovskites were studied by 57Fe emission Mössbauer spectroscopy. It was found that Co prefers lower valence and lower coordination number than Fe in both compounds. The comparison of the emission and transmission Mössbauer spectra of the CO2 treated materials revealed a preferred formation of Fe-containing products in reaction with CO2 in Sr0.5Ca0.5Fe0.5Co0.5 O3-δ, and it is proposed that such a reaction can be responsible for phase separation in Sr0.95Ca0.05Fe0.5Co0.5 O3-δ after absorption and partial desorption of CO2 at 950 °C.

Original languageEnglish
Pages (from-to)425-429
Number of pages5
JournalJournal of Radioanalytical and Nuclear Chemistry
Issue number3
Publication statusPublished - Mar 1 2003


ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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