Ferrite sintered magnet, ferrite particles, bonded magnet, motor, and generator

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United States of America Patent

PATENT NO 11810699
APP PUB NO 20190318856A1
SERIAL NO

16469833

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Abstract

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Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by R1-xAxFem-yCoy, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of B2O3.

description='In-line Formulae' end='lead'0.2≤x≤0.8  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.1≤y≤0.65  (2)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'3≤m<14  (3)description='In-line Formulae' end='tail'

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Patent Owner(s)

  • TDK CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nagaoka, Junnichi Tokyo, JP 6 8
Sato, Jo Tokyo, JP 7 10
Sugawara, Yuichi Tokyo, JP 7 50
Taguchi, Hitoshi Tokyo, JP 31 317

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