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A novel microwave absorber——BaAl_2Fe_(10)O_(19)/poly(m-toluidine) composite:Preparation and electromagnetic properties

查看全文 作　　者：CHEN [1]KeYu;XU [2]QingQing;LI [1]LiangChao;GONG [1]PeiJun;CHEN [1]HaiFeng;XIAO [1]QiuShi;Xu [1]Feng 高影响力作者 机构地区：[1]Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfitce,Zhejiang Normal University,Jinhua 321004,China;[2]Quzhou College,Quzhou 324000,China高影响力机构 出　　处：《Science China Chemistry》索引2012年第55卷第7期,共8页高影响力期刊 基　　金：supported by the National Nature Science Foundation of China (21071125);the Natural Science Foundation of Zhejiang Province(Y4100022,Y4090636);the Science and Technology Key Project of Zhejiang Province (2010C11053) 摘　　要：BaFe10Al2O19 /poly(m-toluidine)(BFA/PMT) composites were synthesized by in-situ polymerization of m-toluidine in the presence of BaFe10Al2O19 particles.The structure,composition and morphology of the obtained samples were characterized by using XRD,FT-IR,UV-visible spectroscopy,SEM and TEM techniques.Their electrical conductivity,magnetic property and microwave absorbing property were measured by the four-probe meter,the vibrating sample magnetometer and the vector network analyzer,respectively.The results indicated that BFA particles were coated effectively by PMT polymer and some interactions between PMT and BFA particles existing in the composites.The conductivity of BFA/PMT composite is smaller than that of pure polymers and its saturation magnetization is a little smaller than that of pure BFA.The influence of the constitution and film thickness of absorbent on its microwave absorbing property is evident.The microwave absorbing properties of the BFA/PMT composites are better than those of pure BFA and PMT.When optimizing the mass rate of BFA/PMT to 0.3,the absorbent with 2 mm film thickness has the minimum reflection loss of 28.26 dB at approximate 14.24 GHz,and the maximum available bandwidth of 8.8 GHz,respectively.The results show that these composites can be used as advancing absorption and shielding materials due to their favorable microwave absorbing property. 关 键 词：复合材料 间甲苯胺 电磁性能 微波吸收 博鳌亚洲论坛 振动样品磁强计 光电倍增管 矢量网络分析仪
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