| 组分对FeCoB纳米晶微波电磁参数及吸波性能的影响 |
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| 引用本文： | 胡建平,庞永强,程海峰,唐耿平,邢欣.组分对FeCoB纳米晶微波电磁参数及吸波性能的影响[J].功能材料,2010,41(4). |
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| 作者姓名： | 胡建平 庞永强 程海峰 唐耿平 邢欣 |
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| 作者单位： | 1. 北京航天航空大学,材料科学与工程学院,北京,100191
2. 国防科技大学,航天与材料工程学院重点实验室,湖南,长沙,410073 |
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| 基金项目： | 国家自然科学基金资助项目(50802114) |
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| 摘 要： | 利用两步机械球磨法制备了薄片状的Fe-CoB纳米晶材料,并研究了B含量对材料物相结构、静态磁性能、微波电磁参数和吸波性能的影响。结果表明,适当地加入非晶B会加强晶相与非晶相的交换耦合作用,从而使FeCoB的磁导率随着B含量的增加先增大后减小,复介电常数则随着B含量的增加单调降低,显著地改善了吸波材料的阻抗匹配特性。通过计算机模拟表明,与未添加非晶B的样品相比,FeCoB纳米晶材料在低频端有优异的吸波性能。当B含量从3%变化到15%时,在1.8～6.7GHz范围内的吸收强度均-6dB,可应用于拓展吸波材料吸收带宽的设计中。
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| 关 键 词： | FeCoB纳米晶 复磁导率 复介电常数 吸波性能 |
Effect of composition on microwave electromagnetic parameters and absorption properties of FeCoB nanocrystalline composites |
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| HU Jian-ping,PANG Yong-qiang,CHENG Hai-feng,TANG Geng-ping,XING Xin.Effect of composition on microwave electromagnetic parameters and absorption properties of FeCoB nanocrystalline composites[J].Journal of Functional Materials,2010,41(4). |
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| Authors: | HU Jian-ping PANG Yong-qiang CHENG Hai-feng TANG Geng-ping XING Xin |
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| Affiliation: | 1.School of Materials Science and Engineering;Beihang University;Beijing 100191;China;2.Key Laboratory of School of Aerospace and Material Engineering;National University of Defense Technology;Changsha 410073;China |
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| Abstract: | Flake-like FeCoB nanocrystallines with different contents of amorphous boron were prepared by two-step ball-milling.The effect of content of amorphous boron on the microstructure,static magnetic properties and microwave electromagnetic properties was investigated by SEM,XRD,VSM and vector network analyzer.Results show that doping with appropriate content of amorphous boron in FeCo nanocrystalline can enhance the exchange interaction between the crystal and amorphous phase,and so the complex permeability inc... |
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| Keywords: | FeCoB nanocrystalline complex permeability complex permittivity absorption properties |
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