One-Dimensional Magnetic FeCoNi Alloy Toward Low-Frequency Electromagnetic Wave Absorption  

作　　者：Bintong Yang Jiefeng Fang Chunyang Xu Hui Cao Ruixuan Zhang Biao Zhao Mengqiu Huang Xiangyu Wang Hualiang Lv Renchao Che 

机构地区：[1]Laboratory of Advanced Materials,Shanghai Key Lab of Molecular Catalysis and Innovative Materials,Department of Materials Science,Fudan University,Shanghai 200438,People’s Republic of China [2]Willian G.Lowrie Department of Chemical and Biomolecular Engineering,The Ohio State University,Columbus,OH 43210,USA [3]Zhejiang Laboratory,Joint-Research Center for Computational Materials,Hangzhou 311100,People’s Republic of China

出　　处：《Nano-Micro Letters》2022年第10期260-272,共13页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51725101,11727807,51672050,61790581,22088101);the Ministry of Science and Technology of China(973 Project Nos.2018YFA0209102 and 2021YFA1200600);Infrastructure and Facility Construction Project of Zhejiang Laboratory.

摘　　要：Rational designing of one-dimensional(1D)magnetic alloy to facilitate electromagnetic(EM)wave attenuation capability in low-frequency(2-6 GHz)microwave absorption field is highly desired but remains a significant challenge.In this study,a composite EM wave absorber made of a FeCoNi medium-entropy alloy embedded in a 1D carbon matrix framework is rationally designed through an improved electrospinning method.The 1D-shaped FeCoNi alloy embedded composite demonstrates the high-density and continuous magnetic network using off-axis electronic holography technique,indicating the excellent magnetic loss ability under an external EM field.Then,the in-depth analysis shows that many factors,including 1D anisotropy and intrinsic physical features of the magnetic medium-entropy alloy,primarily contribute to the enhanced EM wave absorption performance.Therefore,the fabricated EM wave absorber shows an increasing effective absorption band of 1.3 GHz in the low-frequency electromagnetic field at an ultrathin thickness of 2 mm.Thus,this study opens up a new method for the design and preparation of high-performance 1D magnetic EM absorbers.

关 键 词：Medium-entropy magnetic alloy ONE-DIMENSION Off-axis electronic holography technique Improved electrospinning Lower-frequency electromagnetic wave absorption 

分 类 号：TQ340.64[化学工程—化纤工业]