Original scientific paper

Characterization of Oxide Phases Generated during the Synthesis of NiFe₂O₄

Svetozar Musić ; Ruđer Bošković Institute, P. O. Box 1016, 41001 Zagreb, Croatia
Stanko Popović ; Ruđer Bošković Institute, P. O. Box 1016, 41001 Zagreb, Croatia
Ilona Czakó-Nagy ; Department of Nuclear Chemistry, Eötvös Loránd University, P. O. Box 32, 1518 Budapest, Hungary
Samet Dalipi ; Ruđer Bošković Institute, P. O. Box 1016, 41001 Zagreb, Croatia

Abstract

Oxide phases generated during the synthesis of NiFe₂O₄ from aqueous Ni(N03)2/Fe(N03)3 solution were characterized by X-ray diffraction, Fourier transform IR spectroscopy and 57Fe Mössbauer spectroscopy. Nitrate salts and a-Fe203 were observed in the samples prepared at temperatures up to 300 °C. The formation of nickel ferrite was observed at temperatures of 500 °C and higher. Stoichiometric NiFe₂O₄ was obtained at 1350 °C. NiO and cx-Fe203 were intermediate phases in the process of nickel ferrite formation. A decreased hyperfine magnetic field was observed for a-Fe2Oa prepared at lower temperatures. Decomposition of nitrate groups was followed by Fourier transform IR spectroscopy.

Keywords

Hrčak ID:

136877

URI

https://hrcak.srce.hr/136877

Publication date:

1.11.1994.

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