Fe-6.5wt%Si/纳米Fe3O4复合磁粉芯的组织结构及磁性能研究

作者：Yang Tiansheng; Lu Kechao; Wang Jian; Zheng Zhigang; Liu Xin^*

来源：Journal of Functional Materials, 2021, 52(10): 10023-10028.

DOI：10.3969/j.issn.1001-9731.2021.10.004

• Core loss
• Effective permeability
• Fe-6.5wt% Si soft magnetic composites
• Fe3O4 magnetic nanoparticles doping
• Microstructure

The Fe-6.5wt% Si/nano-Fe3O4 soft magnetic composites (SMCs) are prepared by doping magnetic Fe3O4 nanoparticles. The influence of nano-Fe3O4 addition on microstructure, density, resistivity, permeability, and core loss of the SMCs are studied. The results show that the addition of appropriate amount of nano-Fe3O4 can fill the pores between Fe-6.5wt% Si powders to increase the content of magnetic materials in unit volume and weaken the magnetic dilution effect caused by non-magnetic resin. The interaction of nano-Fe3O4 and Fe-6.5wt% Si particles maintains the magnetic flux continuity of SMCs and greatly improves the permeability. Particularly when the addition of nano-Fe3O4 is 3wt%, the overall performance of SMCs is optimal, in which the density is increased from 6.48 g/cm3 to 6.66 g/cm3, the effective permeability is increased from 72.8 to 81.7, and it has a good frequency stability. ? 2021, Editorial Board of Journal of Functional Materials. All right reserved.

• 单位
  华南理工大学