碳微球中具有高性能 Ku 波段电磁波吸收功能的封闭磁性纳米镍粒子

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-09-19 DOI:10.1016/j.coco.2024.102099

Chao Wang , Mengqiu Huang , Hao Zhu , Lei Wang , Wenbin You , Renchao Che

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引用次数: 0

摘要

成分和结构调整是制备高性能电磁波吸收材料的主要策略。本文制备了磁介质协同 Ni@C 微球，以获得高性能的电磁波吸收性能。首先，通过喷雾干燥技术获得含镍前驱体微球。其次，在 H2/Ar 气氛中热解处理后，还原磁性镍纳米颗粒（NPs）被限制在掺杂 N 的碳微球中。由于三聚氰胺的存在，镍纳米粒子的分布和镍@碳微球的相关电磁参数得到了有效的调节，从而获得了良好的阻抗匹配和电磁响应能力。结果表明，合成的 Ni@C 微球的最小反射损耗（RLmin）为 -48.2 dB，有效吸收带宽（EAB）为 5.7 GHz，几乎覆盖了 Ku 波段。这项研究在开发具有优异吸收能力的磁介质复合微球方面取得了重大进展，同时也为电磁波吸收材料的大规模制备提供了一种策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Confined magnetic nickel nanoparticles in carbon microspheres with high-performance electromagnetic wave absorption in Ku-band

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Confined magnetic nickel nanoparticles in carbon microspheres with high-performance electromagnetic wave absorption in Ku-band

Composition and structure regulation is the primary strategy in preparing high-performance electromagnetic (EM) wave absorption materials. Herein, magnetic-dielectric synergy Ni@C microspheres were fabricated to obtain the high-performance electromagnetic (EM) wave absorption performance. Firstly, the Ni-containing precursor microspheres were obtained via the spray-drying technology. Secondly, reduced magnetic Ni nanoparticles (NPs) were confined in the N-doped carbon microspheres after pyrolysis treatment in the H₂/Ar atmosphere. Duo to the existence of melamine, the distribution of Ni NPs and related EM parameters of Ni@C microspheres were efficiently regulated to seek the well impedance matching and EM responded ability. As results, as-synthesized Ni@C microspheres exhibited the minimum reflection loss (RL_min) of −48.2 dB and effective absorption bandwidth (EAB) of 5.7 GHz, covering almost Ku-band. This research represents a significant advancement in the development of magnetic-dielectric composite microspheres with superior absorption capacity, and it also provides a large-scale preparation strategy for electromagnetic wave absorbing materials.

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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.