化工学报 ›› 2025, Vol. 76 ›› Issue (11): 6099-6109.DOI: 10.11949/0438-1157.20250496

• 材料化学工程与纳米技术 • 上一篇    

金属诱导制备Fe3O4/FeNi/CNT复合材料及其吸波性能研究

梁晟源1,2(), 周如东1,2(), 李文凯1,2, 王李军1,2, 李士阔3()   

  1. 1.中海油常州涂料化工研究院有限公司,江苏 常州 213016
    2.国家涂料工程技术研究中心,江苏 常州 213016
    3.安徽大学材料科学与工程学院磁性功能材料与器件安徽省重点实验室,安徽 合肥 230601
  • 收稿日期:2025-05-07 修回日期:2025-07-02 出版日期:2025-11-25 发布日期:2025-12-19
  • 通讯作者: 周如东,李士阔
  • 作者简介:梁晟源(1990—),男,博士,研发工程师,liangshy10@cnooc.com.cn
  • 基金资助:
    国家涂料工程技术研究中心2024年主任基金项目(KJQZ-2024-1102);国家自然科学基金项目(52172174)

Study on electromagnetic wave absorption properties of Fe3O4/FeNi/CNT composites with magnetic-dielectric loss

Shengyuan LIANG1,2(), Rudong ZHOU1,2(), Wenkai LI1,2, Lijun WANG1,2, Shikuo LI3()   

  1. 1.CNOOC Changzhou Paint and Coating Industry Research Institute Co. , Ltd. , Changzhou 213016, Jiangsu, China
    2.National Engineering Research Center for Coatings, Changzhou 213016, Jiangsu, China
    3.Anhui Key Laboratory of Magnetic Functional Materials and Device, School of Materials Science and Engineering, Anhui University, Hefei 230601, Anhui,China
  • Received:2025-05-07 Revised:2025-07-02 Online:2025-11-25 Published:2025-12-19
  • Contact: Rudong ZHOU, Shikuo LI

摘要:

在信息通信技术日新月异的发展背景下,电磁波辐射问题影响人们身体健康和电子设备的正常工作。为解决上述问题,开发高性能电磁波吸收材料已成为当前科技发展的重要研究方向。作为磁性吸收剂中的重要组成部分,铁氧体吸波材料因合成工艺简单和具有良好的磁损耗优势受到广泛关注。然而其相对介电常数与阻抗匹配较差,难以满足宽频吸波需求。本实验以四氧化三铁为研究对象,通过引入金属镍作为催化剂,实现碳纳米管的原位生长。制备出Fe3O4/FeNi/CNT复合材料,丰富损耗机制和提高电磁波吸收性能。样品在频率4.88 GHz时,最小反射损耗(RLmin)可以达到-39.2 dB。在厚度为2.00 mm的条件下,有效吸收带宽(EAB)可以达到3.5 GHz。通过雷达截面(RCS)模拟证明Fe3O4/FeNi/CNT复合材料具有强电磁波吸收能力,适合应用于实际。本文可为优化铁氧体的吸收带宽和阻抗匹配提供参考。

关键词: 电磁波吸收, 多尺度, 纳米材料, 阻抗匹配, 复合材料

Abstract:

With the rapid development of information and communication technology, electromagnetic radiation poses a threat to human health and the normal operation of electronic devices. To address the aforementioned issues, the development of high-performance electromagnetic wave absorbing materials has become a crucial research direction in current technological advancement. As an important part of magnetic absorbent, ferrite absorbing materials have attracted wide attention because of their simple synthesis process and good magnetic loss advantages. However, its relative dielectric constant is poorly matched with impedance, so it is difficult to meet the requirements of broadband wave absorption. In this paper, Fe3O4 was taken as the research object, and the in-situ growth of carbon nanotubes was realized by introducing nickel as the catalyst. Fe3O4/FeNi/CNT composites were successfully prepared, which enriched the loss mechanism and improved the electromagnetic wave absorption performance. At 4.88 GHz, the absorption of electromagnetic waves yielded a minimum reflection loss (RLmin) of -39.2 dB. When the thickness was 2.00 mm, the effective absorption bandwidth (EAB) was 3.5 GHz. The Fe3O4/FeNi/CNT composite material had been proven through radar cross-section (RCS) simulations to possess strong electromagnetic wave absorption capabilities, making it suitable for practical applications. This work provides a simple and effective method for optimizing the absorption bandwidth and impedance matching of ferrite.

Key words: electromagnetic wave absorption, multiscale, nanomaterials, impedance matching, composites

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