摘要
通过一步共沉淀方法制备CoFe_2O_4/MWCNTs复合材料。研究了CoFe_2O_4/MWCNTs在石蜡不同质量比时吸波性能的差异及原因分析。借助X射线衍射仪、透射电镜和矢量网络分析仪对产物的组成、结构、形貌和电磁参数能进行了表征。结果表明:尖晶石型CoFe_2O_4粒子均一覆盖在碳纳米管表面且粒径在30nm左右。在2到18GHz范围内探讨了CoFe_2O_4/MWCNTs复合材料的微波吸收性能,与石蜡质量比为1∶1的情况下,在频率为8.88GHz,厚度为2mm时,CoFe_2O_4/MWCNTs的最大吸收值达-32.5d B,低于-10d B的频宽为2.4GHz。
Magnetic/dielectric structures have been regarded as a high-performance microwave absorption materials due to their various multiple-loss mechanism. A hybrid material consists of magnetic（CoFe2O4） nanocrystals and multiwalled carbon nanotubes was successfully synthesized by a facile co-precipitation method. The phase structures, morphologies and the chemical compositions of the composites were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and vector network analysis （VNA）. The results show the CoFe2O4 formed a cubic spinel crystal with an average diameter of 10nm. The microwave absorption properties of the composites were investigated at microwave frequency range from 2 to 18GHz. The minimum reflection loss of the CoFe2O4/MWCNTs/paraffin was reached -32.5dB at 15GHz, and the effective frequency bandwidth （RL below -10dB ） is from 8.0 to 10.4GHz. The results indicate that the composites can be the candidate for excellent microwave absorption materials.
作者
孙翔
邢宏龙
刘振锋
王磊
申子瑶
SUN Xiang XING Hong-long LIU Zhen-feng WANG Lei SHEN Zi-yao(School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China)
出处
《安徽化工》
CAS
2017年第1期19-22,共4页
Anhui Chemical Industry
基金
国家自然科学基金:聚α-萘胺基纳米复合材料界面结构及其与红外辐射和微波吸收性能关系研究(51477002)
关键词
多壁碳纳米管
钴铁氧体
吸波性能
共沉淀法
multi-walled carbon nanotubes
cobalt ferrite, absorption property
co-precipitation method
