中国物理B ›› 2023, Vol. 32 ›› Issue (9): 97504-097504.doi: 10.1088/1674-1056/acaa24

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Effect of CeO2 doping on the coercivity of 2:17 type SmCo magnets

Xiao-Lei Gao(高晓磊)1,2, Zhuang Liu(刘壮)2,†, Guang-Qing Wang(王广庆)2, Chao-Qun Zhu(竺超群)1,2, Wen-Xin Cheng(程文鑫)2, Ming-Xiao Zhang(张明晓)2, Xin-Cai Liu(刘新才)1,‡, Ren-Jie Chen(陈仁杰)2, and A-Ru Yan(闫阿儒)2   

  1. 1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;
    2 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
  • 收稿日期:2022-07-19 修回日期:2022-11-16 接受日期:2022-12-09 发布日期:2023-08-23
  • 通讯作者: Zhuang Liu, Xin-Cai Liu E-mail:zliu@nimte.ac.cn;liuxincai@nbu.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2021YFB3503102), the Zhejiang Provincial Key R&D Program of China (Grant No. 2021C01191), and the Science and Technology Innovation 2025 Major Project of Ningbo (Grant No. 2020Z037).

Effect of CeO2 doping on the coercivity of 2:17 type SmCo magnets

Xiao-Lei Gao(高晓磊)1,2, Zhuang Liu(刘壮)2,†, Guang-Qing Wang(王广庆)2, Chao-Qun Zhu(竺超群)1,2, Wen-Xin Cheng(程文鑫)2, Ming-Xiao Zhang(张明晓)2, Xin-Cai Liu(刘新才)1,‡, Ren-Jie Chen(陈仁杰)2, and A-Ru Yan(闫阿儒)2   

  1. 1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;
    2 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
  • Received:2022-07-19 Revised:2022-11-16 Accepted:2022-12-09 Published:2023-08-23
  • Contact: Zhuang Liu, Xin-Cai Liu E-mail:zliu@nimte.ac.cn;liuxincai@nbu.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2021YFB3503102), the Zhejiang Provincial Key R&D Program of China (Grant No. 2021C01191), and the Science and Technology Innovation 2025 Major Project of Ningbo (Grant No. 2020Z037).

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摘要： The effects of CeO2 doping on the magnetic properties and microstructure of 2:17 type SmCo magnets are studied. With the increase of CeO2 from 0 wt.% to 3 wt.%, the coercivity of the magnets increases from 22.22 kOe to over 29.37 kOe, which is an increase of more than 30%. When the doping content is lower than 1 wt.%, the remanence and magnetic energy product of the magnets remain almost constant. Both decrease sharply as the doping concentration further increases. After CeO2 doping, the oxide content in the magnet increases significantly and the Ce element is uniformly distributed in the magnet. Observing the magnetic domains reveals that doping with CeO2 can refine the magnetic domains and make the magnetic domain wall more stable, resulting in a significant increase in the coercivity of the magnets.

关键词: 2:17 type SmCo magnets, coercivity, magnetic domain, microstructure

Abstract: The effects of CeO2 doping on the magnetic properties and microstructure of 2:17 type SmCo magnets are studied. With the increase of CeO2 from 0 wt.% to 3 wt.%, the coercivity of the magnets increases from 22.22 kOe to over 29.37 kOe, which is an increase of more than 30%. When the doping content is lower than 1 wt.%, the remanence and magnetic energy product of the magnets remain almost constant. Both decrease sharply as the doping concentration further increases. After CeO2 doping, the oxide content in the magnet increases significantly and the Ce element is uniformly distributed in the magnet. Observing the magnetic domains reveals that doping with CeO2 can refine the magnetic domains and make the magnetic domain wall more stable, resulting in a significant increase in the coercivity of the magnets.

Key words: 2:17 type SmCo magnets, coercivity, magnetic domain, microstructure

中图分类号:  (Permanent magnets)

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