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Estudio comparativo de las propiedades magnéticas de ferritas hexagonales de Bario obtenidas por los métodos de coprecipitación y microemulsión

Authors: García-Casillas, P. E.; Matutes-Aquino, J. A.;

Estudio comparativo de las propiedades magnéticas de ferritas hexagonales de Bario obtenidas por los métodos de coprecipitación y microemulsión

Abstract

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

Country
Spain
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Keywords

Materiales magnéticos, Nanoparticulas

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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