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材料工程  2017, Vol. 45 Issue (7): 60-65    DOI: 10.11868/j.issn.1001-4381.2016.001428
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
NiZnFe2O4包覆铁基软磁复合材料的制备及性能
吴深1, 樊江磊1, 刘建秀1, 高红霞1, 孙爱芝2
1. 郑州轻工业学院 机电工程学院, 郑州 450002;
2. 北京科技大学 材料科学与工程学院, 北京 100083
Fabrication and Properties of Iron-based Soft Magnetic Composites Coated with NiZnFe2O4
WU Shen1, FAN Jiang-lei1, LIU Jian-xiu1, GAO Hong-xia1, SUN Ai-zhi2
1. School of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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摘要 采用溶胶-凝胶法制备的NiZnFe2O4作为绝缘剂包覆铁粉来制备铁基软磁复合材料,并研究了NiZnFe2O4含量和成型压力对复合材料磁性能的影响。采用SEM,EDX线扫描及元素面分布分析显示在铁粉颗粒表面存在一层均匀的NiZnFe2O4包覆层,绝缘包覆层的存在可以有效地提高软磁复合材料的电阻率。实验结果表明,随着NiZnFe2O4包覆剂含量的增加,软磁复合材料的复数磁导率实部值逐渐降低,与其他含量的样品相比,NiZnFe2O4含量为3%(质量分数,下同)的样品具有最低的复数磁导率虚部值和相对较高的复数磁导率实部值。NiZnFe2O4包覆剂的加入,可以大幅降低材料内部的磁损耗,在100kHz时其磁损耗仅为未包覆样品的16.2%。当NiZnFe2O4的含量为3%,成型压力为1000MPa时,软磁复合材料的密度达到7.14g/cm3,饱和磁感应强度为1.47T。
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吴深
樊江磊
刘建秀
高红霞
孙爱芝
关键词 软磁复合材料NiZnFe2O4绝缘包覆磁损耗    
Abstract:This paper focuses on iron-based soft magnetic composites which were synthesized by utilizing the sol-gel method prepared Ni-Zn ferrite particles as insulating compound to coat iron powder, and the influence of NiZnFe2O4 content and molding pressure on the magnetic properties was studied. The morphology, magnetic properties and density of Ni-Zn ferrite insulated compacts were investigated. Scanning electron microscope,line-scan EDX analysis and distribution maps show that the iron particle surface is covered with a thin layer of uniform Ni-Zn ferrites. The existing of the insulating layer can effectively improve the electrical resistivity of soft magnetic composites. Magnetic measurements show that the real part of permeability decreases with the increase of the Ni-Zn ferrite content, and the sample with 3%(mass fraction, the same below) Ni-Zn ferrite has an acceptable real part and minimum imaginary part of permeability in comparison with other samples. Results show that the addition of NiZnFe2O4 can dramatically decrease the internal magnetic loss, the magnetic loss of coated samples decreases by 83.8% as compared with that of uncoated samples at 100kHz. The density of the Fe-3%NiZnFe2O4 compacts reaches 7.14g/cm3 and the saturation magnetization is 1.47T when the molding pressure is 1000MPa.
Key wordssoft magnetic composites    NiZnFe2O4    insulating    magnetic loss
收稿日期: 2016-11-30      出版日期: 2017-07-21
中图分类号:  TF123  
  TM271  
通讯作者: 吴深(1987-),男,讲师,博士,主要从事磁性材料及器件、先进材料成型方面的研究,联系地址:河南省郑州市东风路5号郑州轻工业学院机电工程学院(450002),E-mail:wszzuli@126.com     E-mail: wszzuli@126.com
引用本文:   
吴深, 樊江磊, 刘建秀, 高红霞, 孙爱芝. NiZnFe2O4包覆铁基软磁复合材料的制备及性能[J]. 材料工程, 2017, 45(7): 60-65.
WU Shen, FAN Jiang-lei, LIU Jian-xiu, GAO Hong-xia, SUN Ai-zhi. Fabrication and Properties of Iron-based Soft Magnetic Composites Coated with NiZnFe2O4. Journal of Materials Engineering, 2017, 45(7): 60-65.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001428      或      http://jme.biam.ac.cn/CN/Y2017/V45/I7/60
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