A novel CNTs/Co9S8 microsphere composites with three-dimensional network structure for efficient electromagnetic wave absorption

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-04-18 DOI:10.1016/j.diamond.2025.112351

Jing Yue , Yiting Cheng , Chunmei Zhang , Tianmiao Zhao , Hongliang Zhao , Chunxin Ma , Shaohua Jiang

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Abstract

A novel CNTs/Co₉S₈ microsphere nanocomposites with a three-dimensional network structure were synthesized via hydrothermal methods, which exhibited excellent electromagnetic wave absorption (EWA) properties. The physical phase composition, microscopic morphology, EWA performance and related mechanisms were deeply discussed. The incorporation of Co₉S₈ nanoparticles formed a three-dimensional conductive network within the CNTs matrix, significantly increasing the heterogeneous interfacial area, thereby enhancing both conductive and interfacial polarization losses. Additionally, the three-dimensional network structure not only enhances the mechanical stability of the material, but also provides multiple reflection and scattering paths for electromagnetic waves (EWs), which significantly improves the energy dissipation efficiency of EWs. Thanks to the synergistic effects of optimized attenuation and favorable impedance matching, the composites demonstrated excellent EWA performance, with a minimum reflection loss of −50.1 dB and an effective absorption bandwidth of 2.56 GHz at a thickness of 2.49 mm. Moreover, the composites reduced the radar cross sectional area, which is an important safeguard for their practical application in stealth technology. This work offers new insights and a theoretical basis for designing three-dimensional EWA materials.

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一种新型的具有三维网状结构的碳纳米管/Co9S8微球复合材料

采用水热法合成了一种具有三维网状结构的CNTs/Co9S8微球纳米复合材料，该材料具有优异的电磁波吸收性能。深入讨论了其物理相组成、微观形貌、EWA性能及其机理。Co9S8纳米颗粒的掺入在CNTs基体内形成了三维导电网络，显著增加了非均质界面面积，从而增加了导电损失和界面极化损失。此外，三维网状结构不仅增强了材料的力学稳定性，而且为电磁波提供了多种反射和散射路径，显著提高了电磁波的能量耗散效率。由于优化的衰减和良好的阻抗匹配的协同作用，复合材料具有出色的EWA性能，最小反射损耗为- 50.1 dB，有效吸收带宽为2.56 GHz，厚度为2.49 mm。此外，该复合材料减小了雷达截面积，这是其在隐身技术中实际应用的重要保障。这一研究成果为三维EWA材料的设计提供了新的思路和理论基础。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.