US 11,984,244 B2
Sintered neodymium-iron-boron magnet and preparation method thereof
Yujun Zeng, Baotou (CN); Minglei Han, Baotou (CN); Zhaoyong Liu, Baotou (CN); Xueliang Zhang, Baotou (CN); Zhigang Xue, Baotou (CN); Quanjin Zeng, Baotou (CN); Yuxiang Dong, Baotou (CN); Junxing Zhao, Baotou (CN); Lan Feng, Baotou (CN); Ze Liu, Baotou (CN); Xia Zhang, Baotou (CN); Jialiang Zhang, Baotou (CN); and Xiangjun Chen, Baotou (CN)
Assigned to Baotou Jinmeng Magnetic Materials Co., Ltd., Baotou (CN); and Yujun Zeng, Baotou (CN)
Filed by Baotou Jinmeng Magnetic Materials Co., Ltd., Baotou (CN); and Yujun Zeng, Baotou (CN)
Filed on Nov. 20, 2021, as Appl. No. 17/531,749.
Claims priority of application No. 202110142574.2 (CN), filed on Feb. 2, 2021.
Prior Publication US 2022/0246337 A1, Aug. 4, 2022
Int. Cl. H01F 1/057 (2006.01); H01F 41/02 (2006.01)
CPC H01F 1/0577 (2013.01) [H01F 41/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A sintered neodymium-iron-boron magnet, which is prepared from raw materials comprising the following components, in mass percentage: 18.5%-40% of an iron powder or a steel powder with a magnetic induction intensity of more than 1.2 T, 4%-10% of a praseodymium-neodymium metal hydride powder, and a remainder of a neodymium-iron-boron powder with a particle size of 1-10 microns, wherein the mass percentages of the above raw materials add up to 100%.