Method for producing sintered R-iron-boron magnet

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United States of America Patent

PATENT NO 10748706
APP PUB NO 20180061568A1
SERIAL NO

15690268

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Abstract

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A method for producing a sintered R-iron (Fe)-boron (B) magnet, the method including: (1) producing a sintered magnet R1-Fe—B-M, where R1 is neodymium (Nd), praseodymium (Pr), terbium (Tb), dysprosium (Dy), gadolinium (Gd), holmium (Ho), or a combination thereof; M is titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), gallium (Ga), calcium (Ca), copper (Cu), Zinc (Zn), silicon (Si), aluminum (Al), magnesium (Mg), zirconium (Zr), niobium (Nb), hafnium (Hf), tantalum (Ta), tungsten (W), molybdenum (Mo), or a combination thereof; (2) removing oil, washing using an acid solution, activating, and washing using deionized water the sintered magnet, successively; (3) mixing a superfine terbium powder, an organic solvent, and an antioxidant to yield a homogeneous slurry, coating the homogeneous slurry on the surface of the sintered magnet; and (4) sintering and aging the sintered magnet.

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Patent Owner(s)

Patent OwnerAddress
YANTAI ZHENGHAI MAGNETIC MATERIAL CO LTD264006 NO 9 SHANTOU STREET YANTAI DEVELOPMENT ZONE SHANDONG PROVINCE YANTAI CITY SHANDONG PROVINCE 264006

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sun, Xiuyan Yantai, CN 3 8
Tian, Xiaodong Yantai, CN 15 205
Yu, Yongjiang Yantai, CN 13 7
Zhao, Nan Yantai, CN 86 703

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