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Preparation and microwave-absorbing property of BaFe_(12)O_(19) nanoparticles and BaFe12O19/Fe3C/CNTs composites

机译：BAFE_（12）O_（19）纳米粒子和BAFE12O19 / FE3C / CNT复合材料的制备和微波吸收性能

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摘要

BaFe_(12)O_(19) ferrite was firstly prepared through a sol-gel auto-combustion process, and then BaFe_(12)O_(19)/ Fe3C/CNTs composites were synthesized from the acetylene chemical vapor deposition process with the introducing of BaFe_(12)O_(19) ferrite at 400-600 ° C. The structure and morphology of the BaFe_(12)O_(19) ferrite and BaFe_(12)O_(19)/Fe3C/CNTs composites were studied using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray. The microwave-absorbing properties of pure BaFe_(12)O_(19) and such composites were investigated in the frequency range of 2-18 GHz through the evaluation of the experimental data based on the transmission line theory. The reflection loss results showed that the microwave absorption of BaFe_(12)O_(19)/Fe3C/CNTs composites performed better as the reaction temperature increasing up to 500 ° C, due to the generation of the high-purity helical CNTs. The composites obtained at 600 ～ C performed well in electromagnetic wave loss at low frequency, owing to effective interfacial polarizations and good dispersion of magnetic nanoparticles. The composites were very potential for lightweight and strong electromagnetic attenuation materials at relatively low frequency.
机译：通过溶胶 - 凝胶自动燃烧过程首先制备Bafe_（12）O_（19）铁素体，然后通过乙炔化学气相沉积工艺合成Bafe_（12）O_（19）/ Fe3C / CNTs复合材料Bafe_（12）O_（19）铁氧体在400-600°C下进行的结构和形貌，使用X-研究了Bafe_（12）O_（19）铁氧体和Bafe_（12）O_（12）O_（19）/ FE3C / CNT复合材料的结构和形态射线衍射，扫描电子显微镜，透射电子显微镜和能量分散X射线。通过基于传输线理论的实验数据评估，在2-18GHz的频率范围内研究了纯Bafe_（12）O_（19）的微波吸收性能。反射损失结果表明，由于高纯度螺旋CNT的产生，随着反应温度的增加，诸如反应温度的反应温度越来越高达500℃，微波吸收的微波吸收更好。由于有效的界面偏振和磁性纳米颗粒的良好分散，在600℃下在600〜C处获得的复合材料良好。复合材料在相对低频的轻质和强电磁衰减材料的潜力非常潜力。

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  • 来源
    《RSC Advances》 |2015年第111期|共5页
  • 作者

    Liangjun Yin; Tong Chen; Shiyu Liu;

  • 作者单位

    School of Energy Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices Center for Information in Biomedicine University of Electronic Science and Technology of China Chengdu 611731 China.;

    School of Energy Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices Center for Information in Biomedicine University of Electronic Science and Technology of China Chengdu 611731 China.;

    School of Energy Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices Center for Information in Biomedicine University of Electronic Science and Technology of China Chengdu 611731 China.;

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  • 正文语种 eng
  • 中图分类 化学;
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