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DOI: 10.1039/A805540H (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 227-231

A new route to γ-Fe2O3via an intermediate oxyhydroxide. The reaction of α-NaFeO2 with benzoic acid

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M. C. Blesa, E. Morán, J. D. Tornero, N. Menéndez, E. Mata-Zamora and J. M. Saníger

Abstract

Proton exchange reactions have been performed on α-NaFeO2 at 150[thin space (1/6-em)]°C in molten benzoic acid; a ferrimagnetic material showing the spinel structure was produced. Infrared spectroscopy was used to investigate the oxyhydroxide character of this product which, after thermal treatment at 300[thin space (1/6-em)]°C yields the well known maghemite γ-Fe2O3, although some hydroxyl groups still seem to be present. Besides IR, X-ray diffraction, chemical and thermal analysis, Mössbauer spectroscopy and magnetization measurements are presented and discussed.

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