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采用水热法制备碳纳米管(MWCNT)/四氧化三铁(Fe3O4)复合材料,运用透射电子显微镜、X射线衍射仪、振动样品磁强计及网络矢量分析仪等,对复合材料的微观结构、磁性能及电磁波吸收性能(8.2～12.4 GHz,X波段)进行研究和分析。结果表明,磁性Fe3O4纳米颗粒能够较好地包覆在MWCNTs表面上,并且随着反应混合液中Fe2+和Fe3+浓度的增加,MWCNT/Fe3O4复合材料中的Fe3O4含量增加,MWCNT/Fe3O4复合材料的磁性能增强;当反应混合液中的Fe2+和Fe3+的浓度分别为0.02和0.04 mol/L时,MWCNT/Fe3O4复合材料的电磁波吸收性能最佳,具体表现为吸收峰峰值最低,吸收频宽最宽。
The MWCNT / Fe3O4 composites were prepared by hydrothermal method. The microstructure of the composites was characterized by transmission electron microscopy, X-ray diffraction, vibrating sample magnetometer and network vector analyzer. , Magnetic properties and electromagnetic wave absorption (8.2 ~ 12.4 GHz, X-band) for research and analysis. The results show that the magnetic Fe3O4 nanoparticles can be well coated on the surface of MWCNTs, and with the increase of Fe2 + and Fe3 + concentrations in the reaction mixture, the content of Fe3O4 in MWCNT / Fe3O4 composites increases. The magnetic properties of MWCNT / Fe3O4 composites The MWCNT / Fe3O4 composite has the best electromagnetic wave absorption performance when the concentrations of Fe2 + and Fe3 + in the reaction mixture are 0.02 and 0.04 mol / L, respectively. The results show that the absorption peak is the lowest and the absorption band is the broadest.