A. Ataie, S. Heshmati-Manesh, H. Kazempour
May 1, 2002
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42
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Journal
Journal of Materials Science
Abstract
Fine particles of barium hexaferrite were synthesised by a chemical co-precipitation method using acetate-nitrate (barium acetate + iron nitrate) precursors. The thermal properties, phase composition and morphology of hexaferrite powders were studied. Simultaneous DTA/TG results confirmed by those obtained from XRD and VSM, indicated that the formation of barium hexaferrite occurs at a relatively low temperature of 710°C. This temperature is affected by the Fe3+/Ba2+ molar ratio. The SEM investigations revealed that the mean particle size of barium hexaferrite increases with increasing calcination temperature. In this system the Fe3+/Ba2+ molar ratio of 12 (stoichiometric ratio) is favourable.