The microenvironment of iron in (Ba,Ca)(Fe,Co)O(3-δ) catalyst system

A Mossbauer study

Z. Homonnay, K. Nomura, G. Juhász, A. Vértes, Y. Ujihira

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Perovskite type oxides of Ba(x)Ca(1-x)Fe0.8Co0.2O(3-δ) with x = 0.95, 0.8, 0.6 and 0.4 have been studied by 57Fe transmission Mossbauer spectroscopy. The microenvironment of Fe was found to be sensitively dependent on the Ba to Ca ratio and, more importantly, on the oxygen content. At high Ba concentration, magnetic relaxation is indicated by the Mossbauer spectra. Identification of the various sextets and doublets in the Mossbauer spectra is attempted by the help of thermal treatments of the samples in air and methane as well as by quenching experiments and low temperature measurements.

Original languageEnglish
Pages (from-to)291-296
Number of pages6
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume239
Issue number2
DOIs
Publication statusPublished - 1999

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Mossbauer Spectroscopy
Magnetic relaxation
Methane
Mossbauer spectroscopy
Temperature measurement
Perovskite
Oxides
Quenching
Iron
Hot Temperature
Air
Heat treatment
Oxygen
Catalysts
Temperature
Experiments
perovskite

ASJC Scopus subject areas

  • Analytical Chemistry
  • Inorganic Chemistry
  • Nuclear Energy and Engineering

Cite this

The microenvironment of iron in (Ba,Ca)(Fe,Co)O(3-δ) catalyst system : A Mossbauer study. / Homonnay, Z.; Nomura, K.; Juhász, G.; Vértes, A.; Ujihira, Y.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 239, No. 2, 1999, p. 291-296.

Research output: Contribution to journalArticle

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