摘要
实验采用二茂铁热分解原位沉积法制备了金属Fe填充碳纳米管复合雷达吸波材料．高分辨透射电镜观测证实了Fe在碳纳米管内的填充发生，填充的金属Fe在碳纳米管内呈准连续的纳米线．采用HP8722ES矢量网络分析仪测量了样品在2～18GHz频率范围内的复介电常数和复磁导率．采用吸收屏理论公式计算材料反射率损耗、匹配频段及匹配厚度．结果表明，样品反射损耗随吸收层匹配厚度的增大，吸收峰向低频方向迁移．吸收层在Ku波段具有较好的吸波效果．当吸收层匹配厚度为3．5mm时，在中高频范围内，反射衰减最大达-22．73dB，反射衰减小于-10dB的频宽达4．22GHz．
Carbon nanotubes encapsulated Fe nanowires composites were synthesized via pyrolyzing of ferrocene. The reflection loss （R. L. ）, matching frequency （fm） and matching thickness （dm） were calculated using the theory of the absorbing wall. The electromagnetic properties and microwave - absorbing characteristics effects by the encapsulation of metal Fe were investigated in a frequency range of 8-18 GHz. With matching thickness is 3.5 mm, the maximum reflection loss is about- 22.7 dB for the absorber. The bandwidth corresponding to the reflection loss below - 10 dB is more than 4.22 GHz. With increasing thickness, the peak value of the reflection loss shifts to lower frequency.
出处
《北京交通大学学报》
EI
CAS
CSCD
北大核心
2007年第3期97-99,104,共4页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金资助项目(50674006)
关键词
碳纳米管
微波吸收材料
吸波性能
热分解合成
carbon nanotubes
microwave absorber
reflection loss
pyrolyzing synthesis
