期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 510, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2020.166931
关键词
FeSiBCCr/FeSi compound powder cores; High permeability; Low core loss; Loss separation
资金
- Guangdong Provincial Science and Technology Program [2019A050510050]
- Guangdong province key project of foundation and application foundation research joint fund [2019B1515120020]
- Foshan Municipal Key Technology Tackling Program [1920001001392]
The influences of annealing temperature and mass fraction of gas-atomized FeSi powders within a range of 0 similar to 16 wt% on the soft magnetic properties of Fe-based powder cores, prepared by cold compacting the mixture of the water-atomized FeSiBCCr amorphous powders with diameter of 23 similar to 75 mu m and the FeSi powders with size below 13 mu m, has been systematically investigated. Loss contribution analysis for the corresponding Fe- based compound powder cores was also conducted. The core-shell structure of magnetic powders was characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy analysis, and fourier transform infrared spectroscopy. The inter- and intra-particle eddy current losses have a much less impact on the total energy loss as compared to the hysteresis loss and residual loss in the entire testing frequency range. The residual loss is frequency to the power of 1.509 similar to 1.760. As compared to the FeSiBCCr amorphous powder cores, the effective permeability was enhanced by 17.8% with no-degraded DC-bias property over 63.2% of percent permeability at an applied field of 7960 A/m, while the core loss was reduced by 11.1% for the Fe-based powder cores doped with 12 wt% of the micron-size FeSi powders annealed at 763 K for 0.5 h. The compound Fe-based powder cores with excellent magnetic properties could contribute to minimization of the electrical and electronics components with high efficiency in the high power application field.
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