On the synthesis and cation distribution of aluminum-substituted spinel-related lithium ferrite

H. M. Widatallah, C. Johnson, F. J. Berry, E. Jartych, A. M. Gismelseed, M. Pekala, J. Grabski

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Abstract

Spinel-related Al-substituted Li0.5Fe2.5O4 has been synthesized by sintering a mixture of Al-substituted corundum-related α-Fe2O3 and Li2CO3 at 700 °C which is ca. 450-500 °C lower than the temperatures normally used to prepare the material by conventional ceramic methods. The cation distribution in the material was investigated with X-ray diffraction, Mössbauer spectroscopy and magnetic measurements. Rietveld refinement of the X-ray diffraction data shows the Al3+ ions to substitute for both Fe 3+ and Li+ ions on octahedral B-sites while the displaced Li+ ions substitute for Fe3+ ones at tetrahedral A-sites. This structural model is consistent with Mössbauer and magnetic data.

Original languageEnglish
Pages (from-to)1105-1109
Number of pages5
JournalMaterials Letters
Volume59
Issue number8-9
DOIs
Publication statusPublished - Apr 2005

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Keywords

  • Ceramics
  • Mössbauer spectroscopy
  • Sintering
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)

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