Synergistically magnetic and dielectric properties of two dimensional Fe3Al@PPy lamellae exhibiting broadband and strong electromagnetic wave absorption

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-09-24 DOI:10.1016/j.susmat.2024.e01127

Xixi Luo , Tao Liu , Changze Wei , Di Lan , Xin Li , Ying Ma , Hui Xie , Fangli Yu , Guanglei Wu

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引用次数: 0

Abstract

Addressing the issue of low impedance characteristics is essential to improve the electromagnetic wave absorption performance of magnetic materials. Herein, two dimensional Fe₃Al@polypyrrole (PPy) lamellae with synergistic magnetic and dielectric properties are fabricated by a mechanical alloying, ordering transformation and polymerization process, which exhibits excellent electromagnetic wave absorption performance. By carefully controlling the thickness of the PPy shell, the optimized Fe₃Al@PPy lamellae show a minimum reflection loss of −45.6 dB and an effective absorption bandwidth of 9.1 GHz at a thickness of only 1.5 mm. The conformal growth of Fe₃Al@PPy lamellae can induce strong interfacial polarization, dipole polarization, multiple scattering effect and magnetic loss behaviors for the attenuation of electromagnetic waves. This study demonstrates a facile strategy for the development of efficient Fe₃Al@PPy composite absorbents showing great potential for practical applications.

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二维 Fe3Al@PPy 薄片的磁性和介电协同特性显示出宽带和强电磁波吸收能力

解决低阻抗特性问题对于提高磁性材料的电磁波吸收性能至关重要。本文通过机械合金化、有序转化和聚合工艺制备了具有磁性和介电协同特性的二维Fe3Al@聚吡咯（PPy）薄片，表现出优异的电磁波吸收性能。通过仔细控制 PPy 外壳的厚度，优化后的 Fe3Al@PPy 薄片在厚度仅为 1.5 毫米的情况下，最小反射损耗为 -45.6 dB，有效吸收带宽为 9.1 GHz。Fe3Al@PPy薄片的共形生长可诱导强界面极化、偶极子极化、多重散射效应和磁损耗行为，从而衰减电磁波。这项研究为开发高效的 Fe3Al@PPy 复合吸波材料提供了一种简便的策略，具有巨大的实际应用潜力。

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

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.