Formation of tetravalent Fe ions in LaFeO3 perovskite through mechanochemical modification by ball milling

Tomoki Uchiyama, Maiko Nishibori, Hisahiro Einaga, Yasutake Teraoka

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Mechanochemical modification of previously synthesized LaFeO3 perovskite-type oxide by a high-energy ball milling was investigated to introduce Fe4+ ions or transform some Fe3+ into Fe4+ in LaFeO3. X-ray absorption fine structure studies revealed that the formation of Fe4+ ions into LaFeO3 perovskite has been achieved at first time by ball milling at room temperature without any additives or replacement of La3+ ions by some divalent cations. The structural model of Fe4+ containing LaFeO3 could be described as with a modified perovskite having equal amounts of La and Fe vacancies, which is supported by a good correlation between the results of Fe K-edge XANES spectra and O2-TPD. The synthesis of Fe4+-containing LaFeO3 perovskite by ball milling was able to produce the O2 adsorption capacity of nonsubstituted perovskite-type oxide.

Original languageEnglish
Pages (from-to)1047-1051
Number of pages5
JournalJournal of the American Ceramic Society
Volume98
Issue number4
DOIs
Publication statusPublished - Apr 1 2015

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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