Rare earth-bonded magnetic powder and preparation method therefor, and bonded magnet

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United States of America Patent

PATENT NO 11495376
APP PUB NO 20210151226A1
SERIAL NO

16612294

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Abstract

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The present invention discloses rare earth-bonded magnetic powder and a preparation method therefor. The bonded magnetic powder is of a multilayer core-shell structure, and comprises a core layer and an antioxidant layer (3), wherein the core layer is formed by RFeMB, R is Nd and/or PrNd, and M is one or more of Co, Nb, and Zr; and the core layer is coated with an iron-nitrogen layer (2). In addition, the present invention also discloses the preparation method for the rare earth-bonded magnetic powder and a bonded magnet. The oxidation and corrosion of magnetic raw powder during phosphorization and subsequent treatment process are effectively prevented, thereby further improving the long-term temperature resistance and environmental tolerance of the material.

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Patent Owner(s)

Patent OwnerAddress
GRIREM ADVANCED MATERIALS CO LTD100088 2 XINJIE STREET XICHENG DISTRICT BEIJING BEIJING CITY BEIJING CITY 100088
GUOKE RE ADVANCED MATERIALS CO LTDINGDU VILLAGE EAST YANJIAO SANHE TOWN LANGFANG CITY HEBEI 065201

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hu, Zhou Beijing, CN 9 26
Luo, Yang Beijing, CN 93 348
Quan, Ningtao Beijing, CN 4 2
Xie, Jiajun Beijing, CN 12 6
Yan, Wenlong Beijing, CN 7 7
Yang, Yuanfei Beijing, CN 13 9
Yu, Dunbo Beijing, CN 20 24
Zhang, Hongbin Beijing, CN 88 586

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