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handle: 10261/41838
Por el m todo de coprecipitaci n qu mica se obtuvo un precursor formado por hidr xidos y carbonatos de hierro y bario que al calcinarlo a temperaturas superiores a 730oC se transforma en ferrita de bario. Al calcinar el precursor durante 2 horas se obtuvo la magnetizaci n m xima de 59.1 emu/g para la temperatura de 925oC. Por el m todo de microemulsi n se obtuvo un precursor fino de hidr xidos y carbonatos de hierro y bario que al calcinarlo a temperaturas superiores a 760oC se transforma en ferrita de bario. Al calcinar el precursor durante 12 horas se obtuvo la magnetizaci n m xima de 60.5 emu/g para la temperatura de 925oC. La coercitividad intr nseca del polvo de ferrita de bario obtenido por microemulsi n result ser un 20% menor que la coercitividad intr nseca del polvo de ferrita de bario obtenido por coprecipitaci n. Esta menor coercitividad debe favorecer al m todo de microemulsi n para la producci n de part culas de ferrita de bario que sirvan como medio de grabaci n magn tica perpendicular.
Peer reviewed
Materiales magnéticos, Nanoparticulas
Materiales magnéticos, Nanoparticulas
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