Calcined ferrite, and sintered ferrite magnet and its production method

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United States of America Patent

PATENT NO 11776720
APP PUB NO 20220246338A1
SERIAL NO

17724696

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Abstract

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A sintered ferrite magnet having a composition of metal elements of Ca, R, A, Fe and Co, which is represented by the general formula of Ca1−x−yRxAyFe2n−zCoz, wherein R is at least one of rare earth elements indispensably including La; A is Sr and/or Ba; x, y, z and n represent the atomic ratios of Ca, R, A, Fe and Co; 2n represents a molar ratio expressed by 2n=(Fe+Co)/(Ca+R+A); and x, y, z and n meet the conditions of 0.15≤x≤0.35, 0.05≤y≤0.40, (1−x−y)>y, 0n−z)<11.0.

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Patent Owner(s)

Patent OwnerAddress
PROTERIAL LTDTOKYO 135-0061

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kobayashi, Yoshinori Tokyo, JP 175 2883
Tanioku, Yasuaki Tokyo, JP 3 2
Yoshimitsu, Yushi Tokyo, JP 2 2

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