Hierarchical design of FeCo-based microchains for enhanced microwave absorption in C band

被引：213

作者：

Han, Yixuan ^{[1
]}

He, Mukun ^{[1
]}

Hu, Jinwen ^{[2
,3
]}

Liu, Panbo ^{[1
]}

Liu, Zhongwu ^{[2
,3
]}

Ma, Zhonglei ^{[1
]}

Ju, Wenbo ^{[2
,3
]}

Gu, Junwei ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Chem & Chem Engn, Shaanxi Key Lab Macromol Sci & Technol, Xian 710072, Peoples R China

[2] South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510640, Peoples R China

[3] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

来源：

NANO RESEARCH | 2023年 / 16卷 / 01期

基金：

中国国家自然科学基金;

关键词：

one-dimensional micromagnets; hierarchical structure; microwave absorbing material; magnetic coupling; double-loss mechanisms; HIGH-PERFORMANCE; CARBON MICROSPHERES; FACILE SYNTHESIS; AT-C; EVOLUTION; ALLOYS;

D O I：

10.1007/s12274-022-5111-y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Microwave absorbing materials (MAMs) has been intensively investigated in order to meet the requirement of electromagnetic radiation control, especially in S and C band. In this work, FeCo-based magnetic MAMs are hydrothermally synthesized via a magnetic-field-induced process. The composition and morphology of the MAMs are capable of being adjusted simultaneously by the atomic ratio of Fe2+ to Co2+ in the precursor. The hierarchical magnetic microchain, which has a core-shell structure of two-dimensional FexCo1-xOOH nanosheets anchored vertically on the surface of a one-dimensional (1D) Co microchain, shows significantly enhanced microwave absorption in C band, resulting in a reflection loss (R-L) of lower than -20 dB at frequencies ranging from 4.4 to 8.0 GHz under a suitable matching thickness. The magnetic coupling of Co microcrystals and the double-loss mechanisms out of the core-shell structure are considered to promote the microwave attenuation capability. The hierarchical design of 1D magnetic MAMs provides a feasible strategy to solve the electromagnetic pollution in C band.

引用

页码：1773 / 1778

页数：6

共 44 条

[1] Two step synthesis, electromagnetic and microwave absorbing properties of FeCo@C core-shell nanostructure [J].