Preparation and characterization of LaFe12O19 hexaferrite

Three different methods (mechanical alloying, coprecipitation and sol-gel) were used for preparing LaFe12019 hexaferrite and all seem to be suitable for preparation of this phase. A heat treatment in the small temperature range between 1360 and 1390'C followed by a rapid quenching is necessary...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2005-04, Vol.290-291, p.1255-1258
Main Authors: Kupferling, M, Flores, V Corral, Grossinger, R, Aquino, J Matutes
Format: Article
Language:English
Online Access:Get full text
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Summary:Three different methods (mechanical alloying, coprecipitation and sol-gel) were used for preparing LaFe12019 hexaferrite and all seem to be suitable for preparation of this phase. A heat treatment in the small temperature range between 1360 and 1390'C followed by a rapid quenching is necessary for all preparation methods, since without quenching it is not possible to preserve the La-hexaferrite phase. Detailed investigations were performed for the method of coprecipitation varying the La excess, the heat treatment temperature and the quenching method.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.11.416