| 多壁碳纳米管电磁参数的研究和吸波性能模拟 |
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| 引用本文： | 廖宇涛,张兴华.多壁碳纳米管电磁参数的研究和吸波性能模拟[J].材料导报,2006,20(3):138-140. |
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| 作者姓名： | 廖宇涛 张兴华 |
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| 作者单位： | 广东工业大学材料与能源学院,广州,510643;广东工业大学材料与能源学院,广州,510643 |
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| 基金项目： | 广东省广州市科技攻关项目 |
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| 摘 要： | 系统地研究了不同管径类型的多壁碳纳米管在2～18GHz的电磁参数性能,结果表明多壁碳纳米管没有磁性,而且磁损耗也很小;部分碳管的介电常数实部和虚部随管径的增大而增大,而随频率的增加而减小,20～40nm和40～60nm的CNTs在一定频段范围内介电常数的虚部大于实部,使得其损耗角正切大于1,有利于吸波性能的提高.同时对其吸波性能进行了计算机模拟和分析,结果表明,在2～18GHz范围内,当吸波层厚度设为1mm时,20～40nm的碳管复合物在10dB以上频宽可以达到7GHz,最大损耗峰出现在12.4GHz上,对应值为16.52dB,为实现吸波涂层的"宽、薄、轻"具有一定的理论指导意义.
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| 关 键 词： | 碳纳米管 石蜡 电磁参数 吸波性能 |
Study on the Electromagnetism Parameter of MWCNTs and It's Simulated Microwave-absorbing Property |
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| LIAO Yutao,ZHANG Xinghua.Study on the Electromagnetism Parameter of MWCNTs and It's Simulated Microwave-absorbing Property[J].Materials Review,2006,20(3):138-140. |
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| Authors: | LIAO Yutao ZHANG Xinghua |
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| Affiliation: | Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510643 |
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| Abstract: | The electromagnetism parameters of MWCNTs with different diameter types are study. The results show that the permittivity increases with the increasing of the diameter type from 10 to 60nm, but the permittivity decreases while the frequency increases from 20 to 100nm. Its microwave-absorbing property is also simulated by MATLAB software. The simulated result show that the composites of 20~40nm diameter type CNTs have very good microwave-absorbing property while the thickness is 1mm, and the maximum absorbing can achieve 12.4GHz. |
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| Keywords: | carbon nanotubers wax electromagnetism parameter microwave-absorbing property |
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