期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 502, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2020.166548
关键词
Magnetic powder cores; Amorphous flaky powders; Sol-gel method; Soft magnetic properties
资金
- Natural Science Foundation of Guangdong Province [2017A030313312]
- Guangdong Provincial Science and Technology Program [2019A050510050]
- Foshan Municipal Key Technology Tackling Program [1920001001392]
Fe-based amorphous powder cores based on the industrial flaky FeSiBCCr magnetic powders coated with highquality inorganic (SiO2) insulating layer via a sol-gel method were successfully fabricated to improve the soft magnetic properties of powder cores. The core-shell structure of magnetic flaky powders was characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy analysis, and Fourier transform infrared spectroscopy. The influence of annealing temperature on the soft magnetic properties of the FeSiBCCr magnetic flaky powder cores (MFPCs) has been systematically investigated, and the comparisons were made with the conventional FeSiB and Finemet MFPCs at the same preparation conditions. It was found that the reasonable annealing temperature could enhance the permeability and reduce the core loss for the MFPCs. As compared to the conventional FeSiB MFPCs, the FeSiBCCr MFPCs annealed at 773 K for 0.5 h exhibits a higher permeability of 79.19, and lower core loss of 122.26 mW/m(3) at 100 kHz for B-m = 0.05 T. Additionally, the FeSiBCCr MFPCs shows a better DC-bias property of 51.30%, and lower raw material cost than those of the Finemet MFPCs. The excellent comprehensive magnetic properties of the FeSiBCCr MFPCs are favorable for achieving the optimal design of powder cores toward practical applications.
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