中国物理B ›› 2016, Vol. 25 ›› Issue (5): 57502-057502.doi: 10.1088/1674-1056/25/5/057502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Abnormal variation of magnetic properties with Ce content in (PrNdCe)2Fe14B sintered magnets prepared by dual alloy method

Xue-Feng Zhang(张雪峰), Jian-Ting Lan(兰剑亭), Zhu-Bai Li(李柱柏), Yan-Li Liu(刘艳丽), Le-Le Zhang(张乐乐), Yong-Feng Li(李永峰), Qian Zhao(赵倩)   

  1. 1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • 收稿日期:2015-12-19 修回日期:2016-01-28 出版日期:2016-05-05 发布日期:2016-05-05
  • 通讯作者: Zhu-Bai Li E-mail:lzbgj@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51461033, 51571126, 51541105, and 11547032), the Natural Science Foundation of Inner Mongolia, China (Grant No. 2013MS0110), and the Inner Mongolia University of Science and Technology Innovation Fund, China.

Abnormal variation of magnetic properties with Ce content in (PrNdCe)2Fe14B sintered magnets prepared by dual alloy method

Xue-Feng Zhang(张雪峰)1,2, Jian-Ting Lan(兰剑亭)1,2, Zhu-Bai Li(李柱柏)1, Yan-Li Liu(刘艳丽)1,2, Le-Le Zhang(张乐乐)1,2, Yong-Feng Li(李永峰)1,2, Qian Zhao(赵倩)1,2   

  1. 1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2015-12-19 Revised:2016-01-28 Online:2016-05-05 Published:2016-05-05
  • Contact: Zhu-Bai Li E-mail:lzbgj@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51461033, 51571126, 51541105, and 11547032), the Natural Science Foundation of Inner Mongolia, China (Grant No. 2013MS0110), and the Inner Mongolia University of Science and Technology Innovation Fund, China.

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摘要： Resource-saving (PrNdCe)2Fe14B sintered magnets with nominal composition (PrNd)15-xCexFe77B8 (x=0-10) were prepared using a dual alloy method by mixing (PrNd)5Ce10Fe77B8 with (PrNd)15Fe77B8 powders. For Ce atomic percent of 1% and 2%, coercivity decreases dramatically. With further increase of Ce atomic percent, the coercivity increases, peaks at 6.38 kOe in (PrNd)11Ce4Fe77B8, and then declines gradually. The abnormal dependence of coercivity is likely related to the inhomogeneity of rare earth chemical composition in the intergranular phase, where PrNd concentration is strongly dependent on the additive amount of (PrNd)5Ce10Fe77B8 powders. In addition, for Ce atomic percent of 8%, 7%, and 6% the coercivity is higher than that of magnets prepared by the conventional method, which shows the advantage of the dual alloy method in preparing high abundant rare earth magnets.

关键词: permanent magnets, Ce element, dual alloy method, coercivity

Abstract: Resource-saving (PrNdCe)2Fe14B sintered magnets with nominal composition (PrNd)15-xCexFe77B8 (x=0-10) were prepared using a dual alloy method by mixing (PrNd)5Ce10Fe77B8 with (PrNd)15Fe77B8 powders. For Ce atomic percent of 1% and 2%, coercivity decreases dramatically. With further increase of Ce atomic percent, the coercivity increases, peaks at 6.38 kOe in (PrNd)11Ce4Fe77B8, and then declines gradually. The abnormal dependence of coercivity is likely related to the inhomogeneity of rare earth chemical composition in the intergranular phase, where PrNd concentration is strongly dependent on the additive amount of (PrNd)5Ce10Fe77B8 powders. In addition, for Ce atomic percent of 8%, 7%, and 6% the coercivity is higher than that of magnets prepared by the conventional method, which shows the advantage of the dual alloy method in preparing high abundant rare earth magnets.

Key words: permanent magnets, Ce element, dual alloy method, coercivity

中图分类号:  (High coercivity materials)

  • 75.50.Vv
75.50.Ww (Permanent magnets)