碳纳米管化学镀镍-钴-镧合金的微波吸收性能研究  

Studying Experimentally Microwave Absorbing Properties of Carbon Nanotube with Ni-Co-La Coating

作　　者：姚文惠[1] 黄英[1] 王娜[1] 何倩[1] 丁晓[1] 

机构地区：[1]西北工业大学应用化学系空间应用物理与化学教育部重点实验室,陕西西安710129

出　　处：《西北工业大学学报》2013年第2期317-322,共6页Journal of Northwestern Polytechnical University

基　　金：航天科技创新基金(NBXT0002);航天支撑技术基金(NBXW0001)资助

摘　　要：为了提高碳纳米管的微波吸收性能,采用化学镀的方法在碳纳米管表面镀覆了一层Ni-Co-La合金层。利用扫描电镜、X射线能谱仪、振动样品磁强计、矢量网络分析仪分析了镀层形貌、成分与含量、磁性能,研究了其在2～18 GHz频段内的吸波性能。研究表明:添加适量的稀土镧能显著改善镀层的吸波性能,合金镀层中镧原子的含量可达4.16%(wt)。比较碳纳米管化学镀镍-钴-镧与碳纳米管化学镀镍-钴合金的吸波性能可知,碳纳米管化学镀镍-钴-镧合金反射损失更大,最低反射损耗达到-14.3 dB,反射损失超过-5 dB的频率范围为5.0～7.0 GHz,碳纳米管化学镀镍-钴-镧合金在其原有较高的介电损耗基础上兼具明显的磁损耗。In order to reinforce the microwave absorbing properties of carbon nanotube, the Ni-Co-La alloy was deposited on the surface of carbon nanotube via electroless plating. The morphologies of the coatings were observed through the scanning electron microscope （SEM）. The elements and their content were analyzed through energy dispersion spectroscopy analysis （EDS）. The magnetic properties were studied via the vibrating sample magnetometer. The absorption properties were measured using a vector network analyzer in the frequency range of 2 - 18 GHz. Lanthanum content is 4. 16% （wt） ;the proper Lanthanum can reinforce the absorption properties. The sample exhibits the strongest absorbing peak of - 14. 3 dB at 5.5 GHz, and the effective bandwidth reaches 2 GHz under - 5 dB.

关 键 词：碳纳米管 化学镀 镍-钴-镧合金 吸波性能 稀土元素镧 

分 类 号：TQ316.62[化学工程—高聚物工业]