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SiC/CNTs纳米复合材料吸波性能的研究 预览 被引量:11

Electromagnetic Wave Absorption Properties of SiC Coated CNTs Nano-composites
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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. 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 nanocomposites 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.
作者 梁彤祥 赵宏生 张岳 LIANG Tong-Xiang, ZHAO Hong-Sheng, ZHANG Yue (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2006年第3期 659-663,共5页 Journal of Inorganic Materials
关键词 SiC一维纳米材料 碳纳米管 吸波性能 SiC one-dimensional material CNTs wave absorption property
作者简介 梁彤样(1966-),男,博士,副教授.E-mail:txliang@tsinghua.edu.cn
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