单壁碳纳米管/六角钡铁氧体复合材料的微波吸收性能

贺可强; 郁黎明; 盛雷梅; 安康; 赵新洛

单壁碳纳米管/六角钡铁氧体复合材料的微波吸收性能

上海大学物理系, 低维碳材料与器件物理研究所, 上海 200444

基金项目: 国家自然科学基金(10974131); 上海市教育委员会科技创新基金(09ZZ85)

详细信息

通讯作者:
郁黎明, 副教授, 主要从事铁氧体磁性材料研究 E-mail: lmyu@shu.edu.cn

中图分类号: TM25
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出版历程
- 收稿日期: 2010-07-13
- 修回日期: 2011-03-04
- 刊出日期: 2011-08-14

Microwave absorption properties of single-wall carbon nanotubes/barium hexaferrite composite

Department of Physics and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, China

摘要

摘要: 用电弧法制备含铁的单壁碳纳米管(SWCNTs), 并将其提纯之后掺杂到用溶胶-凝胶自燃法制备的M型六角钡铁氧体(BaFe₁₂O₁₉)纳米晶粉体中, 得到了具有网状结构的复合材料。利用同轴法测试了样品的电磁参数, 研究了不同混合比SWCNTs/BaFe₁₂O₁₉ 复合材料的吸波性能。结果表明: 复合粉体SWCNTs/BaFe₁₂O₁₉的磁损耗主要是由于自然共振和交换共振引起的; 当掺杂2%(质量分数)SWCNTs时, 微波反射衰减最大值可以达到 24.85 dB, 高于10 dB的频带宽度可以达到6.30 GHz, 具有较宽的吸波频段。
- 单壁碳纳米管 /
- 铁氧体 /
- 复合材料 /
- 微波吸收
Abstract: The Fe-filled single-walled carbon nanotubes (SWCNTs) were fabricated by a DC arc discharge method. After purification process and then doped the very substance into the nanocrystalline M-type barium hexaferrite (BaFe₁₂O₁₉), which was synthesized by a sol-gel auto-combustion method. The electromagnetic parameters of the samples were tested using coaxial method, and microwave absorption properties of SWCNTs/BaFe₁₂O₁₉ composite with different doping ratios were investigated. The results indicate that the magnetic loss of composite SWCNTs/BaFe₁₂O₁₉ is mainly attributed to the natural resonance and exchange resonance. When doping 2% mass fraction of SWCNTs, the maximum reflection loss of composite can reach 24.85 dB and the frequency band width of above 10 dB is 6.30 GHz, which is a wide microwave absorption frequency band.
- single-walled carbon nanotubes(SWCNTs) /
- ferrite /
- composite material /
- microwave absorption