High-entropy ferrite with tunable magnetic properties for excellent microwave absorption  

作　　者：Yuying Huo Zhengyan Wang Yanlan Zhang Yongzhen Wang 

机构地区：[1]College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]Shanxi Joint Laboratory of Coal based Solid Waste Resource Utilization and Green Ecological Development,Taiyuan 030024,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第3期668-677,共10页矿物冶金与材料学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52371231);the Key Research and Development Program of Shanxi Province,China(No.202102030201006);the Central Government Guides Local Science and Technology Development Special Fund Project(No.YDZJSX2022B003),the Natural Science Foundation of Shanxi Province,China(No.202203021212205);the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi,China(No.2022L074).

摘　　要：High-entropy design is attracting growing interest as it offers unique structures and unprecedented application potential for ma-terials.In this article,a novel high-entropy ferrite(CoNi)_(x/2)(CuZnAl)_((1-x)/3)Fe_(2)O_(4)(x=0.25,0.34,0.40,0.50)with a single spinel phase of space group Fd3m was successfully developed by the solid-state reaction method.By tuning the Co-Ni content,the magnetic properties of the material,especially the coercivity,changed regularly,and the microwave absorption properties were improved.In particular,the ef-fective absorption bandwidth of the material increased from 4.8 to 7.2 GHz,and the matched thickness decreased from 3.9 to 2.3 mm,while the minimum reflection loss remained below-20 dB.This study provides a practical method for modifying the properties of fer-rites used to absorb electromagnetic waves.

关 键 词：high-entropy oxide spinel ferrite oxygen vacancy radar cross section 

分 类 号：TB34[一般工业技术—材料科学与工程]