Ordered Solid Solution γ′-Fe4N-Based Absorber Synthesized by Nitridation Engineering and Applied for Electromagnetic Functional Devices

IF 21.3 1区工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Fiber Materials Pub Date : 2024-12-02 DOI:10.1007/s42765-024-00501-w

Xiangwei Meng, Jia Li, Shuting Zhang, Di Lan, Meijie Yu, Teng Long, Chengguo Wang

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Abstract

As a kind of ordered solid solution, γ′-Fe₄N exhibits enormous potential in improving electromagnetic wave absorption performance profiting from stable chemical properties, high conductivity and saturation magnetization. In this work, nitrogen-doped carbon fibers embedded with Fe₄N nanospheres were prepared by electrospinning process and gas nitridation engineering to accomplish high-efficiency, broad-bandwidth and thin-thickness microwave absorption. In particular, the influence of intrinsic electronic structure, magnetic phenomena caused by time effect of dynamic magnetization, and anisotropic microscopic texture on attenuation competence and impedance matching characteristics were deeply analyzed. Satisfyingly, γ′-Fe₄N@nitrogen-doped carbon fibers (Fe₄N@NCFs) conferred a minimum reflection loss of − 77.7 dB at 2.0 mm and a maximum effective absorption bandwidth of 5.8 GHz at 1.8 mm. Furthermore, Fe₄N@NCFs displayed broad designability and promising application potential when participated in the design of waste energy secondary utilization device and electromagnetic stealth antennas. This study profoundly delineated the inherent mechanisms of Fe₄N-based absorber and shed light on the functional development and exploitation of materials.

Graphical abstract

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氮化工程合成有序固溶体γ′- fe4n基吸收剂及其在电磁功能器件中的应用

γ′-Fe4N作为一种有序固溶体，具有稳定的化学性质、高导电性和饱和磁化性能，在提高电磁波吸收性能方面具有巨大的潜力。本文采用静电纺丝法和气体氮化工艺制备了包埋Fe4N纳米球的氮掺杂碳纤维，实现了高效、宽带宽、薄厚度的微波吸收。深入分析了材料的本征电子结构、动态磁化时间效应引起的磁现象以及各向异性微观织构对材料衰减能力和阻抗匹配特性的影响。令人满意的是，γ′-Fe4N@nitrogen-doped碳纤维（Fe4N@NCFs）在2.0 mm处的最小反射损耗为−77.7 dB，在1.8 mm处的最大有效吸收带宽为5.8 GHz。此外，Fe4N@NCFs在参与废能二次利用装置和电磁隐身天线的设计时，显示出广泛的可设计性和良好的应用潜力。本研究深刻地揭示了fe4n基吸收体的内在机理，为材料的功能开发和利用提供了思路。图形抽象

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来源期刊

Advanced Fiber Materials Multiple-

CiteScore

18.70

自引率

11.20%

发文量

109

期刊介绍： Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.