Ferrite sintered magnet

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United States of America Patent

PATENT NO 11488752
APP PUB NO 20210090768A1
SERIAL NO

17026848

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Abstract

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The present invention provides a ferrite sintered magnet comprising ferrite crystal grains having a hexagonal structure, wherein the ferrite sintered magnet comprises metallic elements at an atomic ratio represented by formula (1). In formula (1), R is at least one element selected from the group consisting of Bi and rare-earth elements, and R comprises at least La. In formula (1), w, x, z and m satisfy formulae (2) to (5). The above-mentioned ferrite sintered magnet further has a coefficient of variation of a size of the crystal grains in a section parallel to a c axis of less than 45%.

description='In-line Formulae' end='lead'Ca1-w-xRwSrxFezCom  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.360≤w≤0.420  (2)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.110≤x≤0.173  (3)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'8.51≤z≤9.71  (4)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.208≤m≤0.269  (5)description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
TDK CORPORATIONTOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikeda, Masanori Tokyo, JP 87 451
Ishikura, Tomokazu Tokyo, JP 11 35
Morita, Hiroyuki Tokyo, JP 116 1035
Murakawa, Yoshitaka Tokyo, JP 32 367
Muroya, Shogo Tokyo, JP 14 11

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