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Issue 7, 2004
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Self propagating high temperature synthesis of magnesium zinc ferrites (MgxZn1  xFe2O3): thermal imaging and time resolved X-ray diffraction experiments

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Abstract

Spinel ferrites of the form MgxZn1  xFe2O4 (x = 0. 0.25, 0.50, 0.75, 1.00) were prepared by self-propagating high-temperature synthesis (SHS) from reactions of iron(III), zinc and magnesium oxides, iron powder and sodium perchlorate. The driving force for the reactions is the oxidation of iron powder. Reactions were carried out in the presence of an external magnetic field of 0.2 or 1.1 T. Reaction velocity and temperatures were obtained by thermal imaging camera. The transformation of reactants to products was studied by time resolved X-ray diffraction using Rietveld refinement for determination of phase percentages. Reactions typically reached temperatures in excess of 1150 °C with a timescale of complete conversion of reactant to products of 20 s. All materials were characterised by X-ray powder diffraction (XRD), energy dispersive X-ray analysis (EDXA), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), Mössbauer spectroscopy and vibrating sample magnetometry (VSM).

Graphical abstract: Self propagating high temperature synthesis of magnesium zinc ferrites (MgxZn1 [ ] − [ ] xFe2O3): thermal imaging and time resolved X-ray diffraction experiments

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Publication details

The article was received on 05 Nov 2003, accepted on 20 Jan 2004 and first published on 25 Feb 2004


Article type: Paper
DOI: 10.1039/B314159B
Citation: J. Mater. Chem., 2004,14, 1104-1111
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    Self propagating high temperature synthesis of magnesium zinc ferrites (MgxZn1  xFe2O3): thermal imaging and time resolved X-ray diffraction experiments

    H. Spiers, I. P. Parkin, Q. A. Pankhurst, L. Affleck, M. Green, D. J. Caruana, M. V. Kuznetsov, J. Yao, G. Vaughan, A. Terry and A. Kvick, J. Mater. Chem., 2004, 14, 1104
    DOI: 10.1039/B314159B

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