Carbon nanofibers embedded with Fe–Co alloy nanoparticles via electrospinning as lightweight high-performance electromagnetic wave absorbers

IF 11 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-02-29 DOI:10.1007/s12598-023-02592-7

Wen-Jun Cai, Jian-Guo Jiang, Zi-Dong Zhang, Zi-Xuan Liu, Lu-Jie Zhang, Zhen-Kun Long, Ke Bi

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Abstract

As a lot of electromagnetic pollution and interference issues have emerged, to overcome electromagnetic interference, prevent electromagnetic hazards, and develop new high-performance electromagnetic wave (EMW) absorbers have become a significant task in the field of materials science. In this paper, a three-dimensional (3D) carbon nanofibers network with core–shell structure, embedded with varied molar ratios of iron and cobalt (4:0, 3:1, 2:2, 1:3, 0:4), was effectively synthesized (Fe/Co@C-CNFs) via electrospinning. The phase, microstructure, magnetic and EMW absorption properties were studied. It is discovered that Fe/Co@C-CNFs doped with iron: cobalt = 1:1 have excellent EMW absorption capacity. When the matching thickness is 1.08 mm, the minimum reflection loss (RL) value is − 18.66 dB, while the maximum effective absorption bandwidth (EAB) reaches 4.2 GHz (13.9–18 GHz) at a thickness of 1.22 mm. This is owing to the absorbers' superior impedance matching and multiple reflections as well as the conductivity, dielectric, and magnetic losses of carbon nanofibers embedded with Fe–Co alloy particles. In addition, the radar cross section (RCS) of the absorbers has been calculated by CST Studio Suite, showing that the absorbing coating can effectively reduce the RCS at various angles, especially for Fe/Co@C-CNFs doped with iron:cobalt = 1:1. These findings not only provide new insights for the preparation of lightweight and high-performance electromagnetic wave absorbers, but also contribute to energy storage and conversion.

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通过电纺丝嵌入铁-钴合金纳米颗粒的碳纳米纤维作为轻质高性能电磁波吸收体

随着电磁污染和电磁干扰问题的日益突出，克服电磁干扰、防止电磁危害、开发新型高性能电磁波吸收体已成为材料科学领域的一项重要任务。本文通过电纺丝技术有效合成了具有核壳结构的三维（3D）碳纳米纤维网（Fe/Co@C-CNFs），其中嵌入了不同摩尔比的铁和钴（4:0、3:1、2:2、1:3、0:4）。对其相态、微观结构、磁性和电磁波吸收特性进行了研究。研究发现，掺杂铁：钴=1:1 的 Fe/Co@C-CNFs 具有优异的电磁波吸收能力。当匹配厚度为 1.08 mm 时，最小反射损耗 (RL) 值为 - 18.66 dB，而当厚度为 1.22 mm 时，最大有效吸收带宽 (EAB) 达到 4.2 GHz (13.9-18 GHz)。这归功于吸收体卓越的阻抗匹配和多重反射，以及嵌入铁-钴合金颗粒的碳纳米纤维的导电性、介电损耗和磁损耗。此外，CST Studio Suite 还计算了吸收体的雷达截面 (RCS)，结果表明吸收涂层能有效降低不同角度的 RCS，尤其是掺杂了铁：钴 = 1:1 的 Fe/Co@C-CNFs。这些发现不仅为制备轻质、高性能电磁波吸收体提供了新的思路，而且有助于能量的存储和转换。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.