Electromagnetic wave absorption properties of porous carbon/Co nanocomposites
Electromagnetic wave absorption properties of porous carbon/Co nanocomposites
复制标题
多孔碳/Co纳米复合材料的电磁波吸收性能
DOI：
10.1063/1.2957035
复制
发表时间：
2008-07-07
影响因子：
4
通讯作者：
Fan, Tongxiang
中科院分区：
文献类型：
--
作者：
Liu, Qinglei;Zhang, Di;Fan, Tongxiang
采用溶胶-凝胶法制备了多孔碳/钴纳米复合材料。在2-18 GHz范围内测量了电磁参数。与多孔碳复合材料相比，多孔碳/Co纳米复合材料由于界面极化弛豫损耗和欧姆损耗的增加而具有更大的介电损耗。在4.2GHz频率下，厚度为5 mm的多孔C（Co）纳米复合材料的最大反射损耗可达40 dB，其主要的微波吸收机制是介电损耗。讨论了多孔结构对碳/钴纳米复合材料微波吸收性能的影响。(C)2008年美国物理研究所。
Porous carbon/Co nanocomposites were fabricated by a sol-gel method. The electromagnetic parameters were measured in the 2-18 GHz range. Compared with porous carbon composite, porous carbon/Co nanocomposite has larger dielectric loss due to the enhanced interfacial polarization relaxation loss and Ohmic loss. The maximum reflection loss of the porous C(Co) nanocomposite can reach 40 dB at 4.2 GHz with 5 mm in thickness and the primary microwave absorptive mechanism is ascribed to the dielectric loss. The effect of porous structure on microwave absorption property of the carbon/Co nanocomposite was also discussed. (C) 2008 American Institute of Physics.