Improved electromagnetic dissipation of Fe doping LaCoO_(3)toward broadband microwave absorption

查看全文 作　　者：Fan [1]Wang;Weihua [1]Gu;Jiabin [1]Chen;Qianqian [1]Huang;Mingyang [1]Han;Gehuan [1]Wang;Guangbin [1]Ji

机构地区：[1]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Journal of Materials Science & Technology》索引2022年第10期,共9页

基　　金：fnancial support from the National Natural Science Foundation of China(No.51971111)。 摘　　要：Perovskite LaCoO_(3)is of great potential in electromagnetic wave absorption considering its outstanding dielectric loss as well as the existing magnetic response with the magnetic doping.However,the dissipation mechanism of the magnetic doping on the microwave absorption is lack of sufficient investigated.In this paper,LaCo_(1-x)Fe_(x)O_(3)(x=0,0.05,0.1,0.15,0.2,0.25,0.3,LCFOs)perovskites with different Fe doping amounts were prepared successfully by the sol-gel method and subsequent heat treatment in the air atmosphere.The structure characterization carried out by the frst-principles calculations shows the effect of Fe doping on the dielectric and magnetic properties of LCFOs and the strong hybridization of Co/Fe-3d with O-2p in the LCFOs system was successfully demonstrated.Particularly,when x=0.1 and the thickness is only 1.95 mm,the LaCo_(0.9)Fe_(0.1)O_(3)exhibits the best microwave absorption performance with the minimum reflection loss(RL)value of about-41 dB.The typical samples achieve a broad effective absorption bandwidth(EAB)of 5.16 GHz(7.92-13.08 GHz),which covers the total X band(8-12 GHz).Considering that,the especial Fe doping perovskite is promising to be a candidate as efficient microwave absorbers. 关键词：Perovskites LaCoO_(3) Magnetic doping FIRST-PRINCIPLES Electromagnetic wave absorption Broad bandwidth

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Improved electromagnetic dissipation of Fe doping LaCoO_(3)toward broadband microwave absorption

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