核壳结构LaOCl/LaFeO_(3)纳米纤维的阻抗匹配设计及其电磁吸波性能研究  

Core-shell LaOCl/La FeO_(3)nanofibers with matched impedance for high-efficiency electromagnetic wave absorption

作　　者：邢岩 范艺存 严智凯 赵彪 黄语嘉 潘伟 Yan Xing;Yicun Fan;Zhikai Yan;Biao Zhao;Yujia Huang;Wei Pan(School of Science,Nanjing University of Posts&Telecommunications,Nanjing 210023,China;Henan Key Laboratory of Aeronautical Materials and Application Technology,School of Material Science and Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Microelectronics,Fudan University,Shanghai 200433,China;School of Materials Science and Hydrogen Energy,Foshan University,Foshan 528000,China;State Key Laboratory of New Ceramic and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]School of Science,Nanjing University of Posts&Telecommunications,Nanjing 210023,China [2]Henan Key Laboratory of Aeronautical Materials and Application Technology,School of Material Science and Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China [3]School of Microelectronics,Fudan University,Shanghai 200433,China [4]School of Materials Science and Hydrogen Energy,Foshan University,Foshan 528000,China [5]State Key Laboratory of New Ceramic and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Science China Materials》2023年第4期1587-1596,共10页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52102068,52073156,and 52202058);the State Key Laboratory of New Ceramic and Fine Processing,Tsinghua University(KF202112);the Science and Technology on Advanced Functional Composite Laboratory(6142906200509);the Natural Science Foundation of Jiangsu Province(20KJB430017);NUPTSF(NY219162);the Key Science and Technology Program of Henan Province(212102210591);the Foundation for University Youth Key Teachers of Henan Province(2020GGJS170);the Support Program for Scientific and Technological Innovation Talents of Higher Education in Henan Province(21HASTIT004)。

摘　　要：电磁波在无线通信等领域的广泛应用导致了严重的电磁污染,迫切需要研发高性能电磁波吸收材料.本文针对吸波材料阻抗不匹配等关键问题,设计并成功制备了新型核壳LaOCl/LaFeO_(3)纳米纤维电磁波吸收剂.这种独特的一维多级结构由导电LaFeO_(3)磁性壳层和离子化合物LaOCl核层组成.基于介电-磁损耗耦合和阻抗匹配的协同作用,LaOCl/LaFeO_(3)纳米纤维在超低负载条件下(4 w t%),表现出-40.1 d B(2.0 mm)的反射损耗和6.4 GHz(2.4 mm)的有效吸收带宽.该工作提出了一种新型LaOCl/LaFeO_(3)纳米纤维吸波材料,并为阻抗匹配调控和电磁吸波性能优化开辟了新策略.The widespread applications of electromagnetic(EM)waves in wireless communication and detection may lead to severe EM wave pollution,which drives the urgent need for EM wave absorbents.However,satisfactory impedance matching remains a challenge for the wide bandwidth absorption of one-dimensional core-shell absorbers.To cope with this challenge,in this study,a novel core-shell LaOCl/LaFeO_(3)nanofiber(NF)is designed and successfully synthesized via electrospinning followed by proper thermal treatment.This unique structure first assembles conductive magnetic LaFeO_(3)shells and ionic compound LaOCl cores.Benefiting from the synergistic contributions of the dielectric and magnetic loss coupling and impedance matching,the LaOCl/LaFeO_(3)NFs exhibit a dramatically optimized performance with a minimum reflection loss(RL)of-40.1 d B(at 2.0 mm)and an effective absorption bandwidth(EAB)of 6.4 GHz(at 2.4 mm)under an ultra-low filler loading of 4 wt%.This work provides a promising LaOCl/LaFeO_(3)NF EM wave absorber and opens up a new avenue to tune the impedance match by the composition and microstructure design.

关 键 词：阻抗不匹配 无线通信 反射损耗 阻抗匹配 离子化合物 吸波材料 电磁污染 负载条件 

分 类 号：TB383.1[一般工业技术—材料科学与工程]