Development of Flexible Sendust Composite Sheets With Enhanced Magnetic Permeability for Microwave Absorbers and Antennas

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Magnetics Pub Date : 2025-04-16 DOI:10.1109/TMAG.2025.3561655

Matthew P. Whalen;David T. Plouff;Nicholas B. Shevchenko;Mark Mirotznik;John Q. Xiao

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引用次数: 0

Abstract

The demand for high-frequency soft magnetic composites with elevated permeability and flexibility is growing for applications in microwave absorbers and magnetodielectric antennas. However, balancing high permeability with mechanical flexibility remains challenging. This study presents flexible Sendust (FeSiAl) composite sheets, fabricated with a hot-pressing technique that aligns flakes within an acrylic rubber and epoxy resin matrix. The alignment significantly enhances relative permeability at high frequencies, achieving single-layer film properties of

$\mu _{r} ^{\prime } =14.8$

and

$\mu _{r} ^{\prime \prime } =20.4$

at 1 GHz, alongside high saturation magnetization (118 emu/g) and high hesitivity (44.7 k

$\Omega \text {m}^{-1}$

), outperforming commonly used materials such as NiZn ferrite. Our method supports customizable thickness without sacrificing permeability, establishing a versatile platform for advanced conformal microwave absorber and antenna applications.

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微波吸收器和天线用增强磁导率柔性复合材料的研制

在微波吸收器和磁介质天线中，对高磁导率和高弹性的高频软磁复合材料的需求日益增长。然而，平衡高渗透性和机械柔韧性仍然具有挑战性。本研究展示了柔性Sendust （FeSiAl）复合板材，采用热压技术在丙烯酸橡胶和环氧树脂基体中排列薄片。该取向显著提高了高频下的相对磁导率，在1 GHz时实现了$\mu _{r} ^{\prime } =14.8$和$\mu _{r} ^{\prime \prime } =20.4$的单层膜性能，同时具有高饱和磁化强度（118 emu/g）和高磁导率（44.7 k $\Omega \text {m}^{-1}$），优于常用材料，如NiZn铁氧体。我们的方法在不牺牲导磁率的情况下支持可定制的厚度，为先进的共形微波吸收器和天线应用建立了一个通用平台。

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

IEEE Transactions on Magnetics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

14.30%

发文量

565

审稿时长

4.1 months

期刊介绍： Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.