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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

SiC/CNTs纳米复合材料吸波性能的研究

梁彤祥, 赵宏生, 张岳   

  1. 清华大学核能与新能源技术研究院, 北京 100084
  • 收稿日期:2005-05-26 修回日期:2005-08-29 出版日期:2006-05-20 网络出版日期:2006-05-20

Electromagnetic Wave Absorption Properties of SiC Coated CNTs Nano-composites

LIANG Tong-Xiang, ZHAO Hong-Sheng, ZHANG Yue   

  1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
  • Received:2005-05-26 Revised:2005-08-29 Published:2006-05-20 Online:2006-05-20

PDF (PC)

2685

被引次数

32

摘要： 采用聚碳硅烷前驱体转化法制备了SiC/CNTs纳米复合材料, 采用扫描电子显微镜、透射电子显微镜、高分辨电子显微镜对样品进行了微观结构分析, 并测试了材料在2～18GHz频率范围内的电磁参数. 结果表明, 当初始聚碳硅烷/二甲苯溶液浓度为10%～15%时, 聚碳硅烷前驱体转化法在CNTs表面可以制备SiC包覆层均匀致密的复合一维纳米材料. SiC包覆CNTs一维纳米材料的电磁参数测试表明, 其损耗机制以介电损耗为主, 当聚碳硅烷含量为15%时, SiC/CNTs纳米复合材料具有最高的介电常数和损耗角, 较好的电磁波吸收特性, 并表现出复合效应.

关键词: SiC一维纳米材料, 碳纳米管, 吸波性能

Abstract: SiC coated CNTs nano-composites were prepared by the conversion of the precursor polycarbosilane (PCS) and their microstructures were observed and analyzed by SEM, TEM and HRTEM. The electromagnetic parameters of the nano-composites were measured under the frequency from 2 to 18GHZ. Results
showed that uniform and compact SiC coatings on the surfaces of CNTs could be synthesized in the initial PCS/xylene concentration section of 10%～15%. The measurement of the electromagnetic parameters of SiC coated CNTs one-dimensional nano-composites indicated that the main electromagnetic loss mechanism was dielectric loss. When the initial PCS concentration was 15%, the SiC coated CNTs nano-composites had the highest dielectric coefficient and loss angle and the best electromagnetic wave absorption properties as well as the composite effects.

Key words: SiC one-dimensional material, CNTs, wave absorption property

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