Ferrite sintered magnet, ferrite particle, bonded magnet and rotating electric machine

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United States of America Patent

PATENT NO 11688535
APP PUB NO 20200312497A1
SERIAL NO

16825290

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Abstract

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This ferrite sintered magnet comprises ferrite phases having a magnetoplumbite type crystal structure. This magnet comprises an element R, an element M, Fe, Co, B, Mn and Cr, the element R is at least one element selected from rare earth elements including Y, the element M is at least one element selected from the group consisting of Ca, Sr and Ba, with Ca being an essential element, and when an atomic composition of metallic elements is represented by R1-xMxFem-yCoy, x, y and m satisfy formulae:

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)

Patent OwnerAddress
TDK CORPORATIONTOKYO

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Inventor(s)

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

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