Croatica Chemica Acta, Vol. 67 No. 3, 1994.
Izvorni znanstveni članak
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
Sažetak
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.
Ključne riječi
Hrčak ID:
136877
URI
Datum izdavanja:
1.11.1994.
Posjeta: 664 *