FERROMAGNETIC PARTICLES AND PROCESS FOR PRODUCING THE SAME, ANISOTROPIC MAGNET AND BONDED MAGNET
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United States of America Patent
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Issued Date -
Sep 27, 2012
app pub date -
Oct 19, 2010
filing date -
Oct 22, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention relates to Fe16N2 particles in the form of a single phase which are obtained by subjecting iron oxide or iron oxyhydroxide whose surface may be coated with at least alumina or silica, if required, as a starting material, to reducing treatment and nitridation treatment, a process for producing the Fe16N2 particles in the form of a single phase for a heat treatment time of not more than 36 hr, and further relates to an anisotropic magnet or a bonded magnet which is obtained by magnetically orienting the Fe16N2 particles in the form of a single phase. The Fe16N2 particles according to the present invention can be produced in an industrial scale and have a large BHmax value.
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