Ferrite sintered magnet, ferrite particles, bonded magnet, and rotating electrical machine

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United States of America

PATENT NO 12243668
APP PUB NO 20220157498A1
SERIAL NO

17598508

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Abstract

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A ferrite sinter magnet has a ferrite phase having a magnetoplumbite-type crystal structure, and contains at least a metal element A, a metal element R, Fe, Co, Zn, and B. The element A is at least one kind of element selected from the group consisting of Sr, Ba, Ca, and Pb, and essentially includes Ca. the element R is at least one kind selected from the group consisting of Bi and rare-earth elements including Y, and essentially includes La. Atomic ratios of the metal elements satisfy the following Expressions (1) to (5),

description='In-line Formulae' end='lead'A1-rReFexCoyZnz  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.40≤r≤0.70  (2)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'8.20≤x≤9.34  (3)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.05≤y≤0.50  (4)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0<z≤0.20  (5)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
Abe, Takuma Tokyo, JP 9 57
Muroya, Shogo Tokyo, JP 14 11
Nagaoka, Junichi Tokyo, JP 13 47
Ohmura, Masashi Tokyo, JP 8 49
Sato, Jo Tokyo, JP 8 17

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