Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
Hard Magnetic Materials
Magnetic Properties of Bi and Si Oxides-Doped M-Type Barium Ferrite
J. KatoD. MatsubayashiK. YamauchiM. InagakiK. Ono
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JOURNAL OPEN ACCESS

2014 Volume 61 Issue S1 Pages S262-S265

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Abstract
Barium ferrite doped with Bi and Si oxide was sintered densely at a low temperature of approximately 900°C, suppressing grain growth. This ferrite magnet had a two-phase structure comprising a barium ferrite phase and an amorphous bismuth silicate phase. We investigated the relationship between the magnetic properties and SiO2 content and found that the coercive force increased in proportion to the SiO2 content. It was suggested that the coercive force increased because each grain was magnetically shielded by a grain boundary phase.
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© 2014 by Japan Society of Powder and Powder Metallurgy

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