Hollow porous FeCo/Cu/CNTs composite microspheres with excellent microwave absorption performance  

作　　者：Xiaowei Liu Linhe Yu Guozhen Zhu Zhipeng Wang Gangjie Lian Xuhui Xiong Wenbin You Renchao Che 

机构地区：[1]School of Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China [2]Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai, 200438, China [3]Nanchang University, Nanchang, 330031, China [4]School of Materials Science & Engineering, Tongii University, Shanghai, 201804, China [5]College of Physics, Donghua University, Shanghai, 201620, China

出　　处：《Nano Research》2024年第11期9857-9864,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52231007,12327804,T2321003,and 22088101);in part by the National Key Research Program of China(No.2021YFA1200600);the Science and Technology Research Project of Jiangxi Provincial Department of Education(No.GJJ200338);the Fund of Science and Technology on Surface Physics and Chemistry Laboratory(No.JCKYS2023120201);the Fund of Key Laboratory of High Temperature Electromagnetic Materials and Structure of MOE(No.KB202401).

摘　　要：Magnetic/dielectric composite materials with numerous heterointerfaces are highly promising functional materials, which are widely applied in the fields of electromagnetic wave absorption. Constructing heterogeneous structure is beneficial to further enhance the microwave absorption performance of composite materials. However, the process of constructing multi-heterogeneous interfaces is extremely complex. In this work, hollow porous FeCo/Cu/CNTs composite microspheres are prepared by the simple spray drying method and subsequently two-step annealing treatment, which possess abundant heterogeneous interfaces, unique three-dimensional conductive network and magnetic coupling network. This unique structure is beneficial to improving the ability of dielectric loss and magnetic loss, and then achieving an excellent microwave absorption performance. The prepared FeCo/Cu/CNTs-1 composite microspheres maintain a minimum reflection loss (RL) of −48.1 dB and a maximum effective absorption bandwidth of 5.76 GHz at a thickness of 1.8 mm. Generally, this work provides a new idea for designing multi-heterogeneous of microwave absorbing materials.

关 键 词：heterogeneous interface hollow structure three-dimensional conductive network microwave absorption 

分 类 号：TB33[一般工业技术—材料科学与工程]