Solid state reactions in the Fe2O3-CaCO3-In2O3 system

Anna Sztaniszlav, Magdolna Balla, Maria Farkas-Jahnke, C. Novák

Research output: Contribution to journalArticle

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Abstract

The kinetics of solid-state reactions of powdered reactants were investigated by X-ray and by differential thermogravimetry in a magnetic field. Measurements revealed mutual diffusion of the Fe3+ and In3+ ions in the Fe2O3-In2O3 system heat treated for 3 h at 700 to 1400° C. Diffusion of indium into the Fe2O3 lattice caused a shift of the Curie temperature of the antiferromagnetic iron oxide towards lower temperatures. Only Caln2O4 was found between CaCO3 and In2O3 up to 1400° C. Also, in the Fe2O3-CaCO3-In2O3in system, the reaction started with the mutual diffusion of iron and indium and the forming of CaFe2O4. End-products were the magnetic α-Ca4Fe14O25 and CaFe4O7, and the non-magnetic CaFe5O7, depending on the In3+ concentration. Indium stabilized the magnetic calcium-iron oxide structures, shifting their Curie temperatures towards lower values.

Original languageEnglish
Pages (from-to)2353-2358
Number of pages6
JournalJournal of Materials Science
Volume25
Issue number5
DOIs
Publication statusPublished - May 1990

Fingerprint

Indium
Solid state reactions
indium
Curie temperature
solid state
Iron oxides
iron oxides
calcium oxides
thermogravimetry
Thermogravimetric analysis
Calcium
Iron
Ions
Magnetic fields
iron
X rays
heat
Kinetics
shift
kinetics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Solid state reactions in the Fe2O3-CaCO3-In2O3 system. / Sztaniszlav, Anna; Balla, Magdolna; Farkas-Jahnke, Maria; Novák, C.

In: Journal of Materials Science, Vol. 25, No. 5, 05.1990, p. 2353-2358.

Research output: Contribution to journalArticle

Sztaniszlav, A, Balla, M, Farkas-Jahnke, M & Novák, C 1990, 'Solid state reactions in the Fe2O3-CaCO3-In2O3 system', Journal of Materials Science, vol. 25, no. 5, pp. 2353-2358. https://doi.org/10.1007/BF00638027
Sztaniszlav, Anna ; Balla, Magdolna ; Farkas-Jahnke, Maria ; Novák, C. / Solid state reactions in the Fe2O3-CaCO3-In2O3 system. In: Journal of Materials Science. 1990 ; Vol. 25, No. 5. pp. 2353-2358.
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