摘要
利用高温热解炭化制备炭化纳米Co_3O_4与硅藻土复合材料,研究其磁性和吸波性能。采用X射线衍射、扫描电镜、透射电镜、振动样品磁强计和矢量网络分析仪等测试分析技术对复合材料进行表征。结果表明:平均粒径为50nm的超顺磁性纳米Co_3O_4粒子和无定形碳均匀分散于硅藻土表面和孔隙内,形成稳定的复合体。炭化纳米Co_3O_4/硅藻土复合具有较强的超顺磁性和吸波性能,最大反射率损失为-14.7dB,<-10dB的频率范围大约为14～18GHz,带宽为4GHz。
Carbonized nano-Co3O4 particles and diatomite were used for preparation of the composite of carbonized nano-Co3O4/diatomite by pyrolysis method,the magnetic and absorption properties were studied.The composite was characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,vibrating sample magnetometer.The results show that the superpara magnetic nano-Co3O4 particles with average size of 50nm and amorphous activated carbon are uniformly dispersed in the surface and pores of diatomite to form a stable composite.Carbonized nano-Co3O4/diatomite composite indicates high magnetic and microwave absorption performance with maximum reflection loss of一14.7dB,<一10dB frequency range about 14-18GHz and bandwidth of 4GHz.
作者
张博
付琪智
林森
陈廷芳
孙仕勇
蒋卉
ZHANG Bo;FU Qi-zhI;LIN Sen;CHEN Ting-fang;SUN Shi-yong;JIANG Hui(Key Laboratory of Solid Waste Treatment and Resource Recycle(Ministry of Education),Institute of Non-metallic Minerals,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Provincial Engineering Laboratory of Non-metallic Mineral Powder Modiiication and High Eficiency Utilization,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2019年第2期62-67,共6页
Journal of Materials Engineering
基金
国家自然科学基金项目(41672039)
固体废物处理与资源化教育部重点实验室开放基金(09zxgk06)
关键词
纳米Co3O4
硅藻土
复合材料
及波性能
炭化
nano-Co3O4
diatomite
composite
microwave absorption property
carbonization
