Composite rare earth anisotropic bonded magnet and a preparation method thereof

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United States of America Patent

PATENT NO 11981983
APP PUB NO 20210134499A1
SERIAL NO

17090710

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Abstract

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The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.

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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
GRIREM HI-TECH CO LTDNORTH OF GUSHAN SOUTH ROAD AND EAST OF HAPPINESS ROAD HI-TECH INDUSTRIAL ZONE YANJIAO TOWN SANHE LANGFANG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hu, Zhou Beijing, CN 9 26
Liao, Yifan Beijing, CN 6 3
Luo, Yang Beijing, CN 93 348
Wang, Zhongkai Beijing, CN 12 5
Wang, Zilong Beijing, CN 28 27
Xie, Jiajun Beijing, CN 12 6
Yang, Yuanfei Beijing, CN 13 9
Yu, Dunbo Beijing, CN 20 24

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