Synthesis of ultrafine particles of barium ferrite by chemical coprecipitation
A new method to synthesize barium hexaferrite by chemical coprecipitation is described. A mixed precursor was precipitated by addition of a barium salt to a strongly alkaline ferrate (VI) solution. The precursor yielded barium hexaferrite on heating for 6 h at 800°C; partial transformation was evide...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222461_v32_n4_p1025_Jacobo http://hdl.handle.net/20.500.12110/paper_00222461_v32_n4_p1025_Jacobo |
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| Sumario: | A new method to synthesize barium hexaferrite by chemical coprecipitation is described. A mixed precursor was precipitated by addition of a barium salt to a strongly alkaline ferrate (VI) solution. The precursor yielded barium hexaferrite on heating for 6 h at 800°C; partial transformation was evident even at lower temperatures, from X-ray patterns and Mössbauer spectra. Scanning electron microscopy of the powders fired at 800°C, showed that the particles were less than 0.5 μm in diameter. |
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