期刊
ACTA METALLURGICA SINICA-ENGLISH LETTERS
卷 26, 期 4, 页码 366-372出版社
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-013-0003-5
关键词
FeSi alloy; Absorbing property; Shielding property; Mechanical milling
资金
- National Natural Science Foundation of China [51275025]
- High Technology Research and Development Program of China [2009AA043804]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China [2007B32]
- Innovation Foundation of BUAA
Flaky FeSi absorbents with different size ranges were fabricated by sintering after mechanical milling process. X-ray diffraction (XRD) was used to analyze the particle crystal grain structure. The complex permittivity and permeability of FeSi/paraffin composites were measured in frequency of 2-12 GHz using a vector network analyzer, and the DC electric conductivity was measured by the standard four-point contact method, then microwave reflection loss (RL) and shielding effectiveness (SE) were calculated. It was obtained that alpha-Fe appeared in the super-lattice diffraction peaks in XRD pattern. As the particles size decreased, the permittivity decreased due to the inferior microwave electrical conductivity and dielectric loss tangent, while the permeability increased due to the decrease of diameter-thickness ratio, which could be demonstrated in the comparison between the experiment and calculation results. When thickness is 1 mm, the composites with the smallest FeSi particles addition had a better absorbing property for the better impedance matching characteristic, and the minimum RL was -7.9 dB at 4.6 GHz. While the composites with larger FeSi particles addition had an excellent shielding property due to the higher permittivity, the SE value ranged from 15 dB to 30 dB at the frequency band.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据