Hollow porous high-entropy metal oxides enhanced synergistic loss with excellent electromagnetic wave absorption

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-08-30 DOI:10.1016/j.coco.2025.102569

Chenyu Jia , Feng Zhang , Zixuan Wang , Changpeng Lv , Di Lan , Siyuan Zhang , Zirui Jia , Zhenguo Gao , Guanglei Wu

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引用次数: 0

Abstract

Research on high-entropy metal oxides (HEOs) has been a focal point, but its application in electromagnetic wave absorption remains underexplored. This study aims to gain a deeper understanding of the relationship between different HEOs and their electromagnetic wave (EMW) absorption performance. Using electrospinning combined with thermal decomposition techniques, the study prepared a series of hollow porous HEOs composites with various structures from five or more metal nitrates. The findings reveal that HEO's lattice distortions, defects, and heterogeneous interfaces with the fiber matrix contribute to an excellent synergistic absorption mechanism. Comparative studies show that HEO with spinel structure exhibits the best impedance matching and attenuation capabilities, achieving a minimum reflection loss (RL_min) of −56.08 dB at a thickness of 2.5 mm. Additionally, this material achieves an ultra-wideband effective absorption bandwidth (EAB) of up to 6.88 GHz. This research not only broadens the scope of HEO research but also provides a new option for the preparation of wave-absorbing materials.

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空心多孔高熵金属氧化物具有优异的电磁波吸收性能，增强了协同损耗

高熵金属氧化物（HEOs）的研究一直是人们关注的焦点，但其在电磁波吸收中的应用尚未得到充分的探索。本研究旨在更深入地了解不同heo与其电磁波吸收性能之间的关系。采用静电纺丝结合热分解技术，以5种或5种以上的金属硝酸盐为原料，制备了一系列具有不同结构的中空多孔HEOs复合材料。研究结果表明，HEO的晶格畸变、缺陷和与纤维基体的异质界面有助于形成优异的协同吸收机制。对比研究表明，尖晶石结构HEO具有最佳的阻抗匹配和衰减能力，在厚度为2.5 mm时，反射损耗最小（RLmin）为−56.08 dB。此外，该材料实现了高达6.88 GHz的超宽带有效吸收带宽（EAB）。本研究不仅拓宽了HEO研究的范围，而且为吸波材料的制备提供了新的选择。

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

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.