Optimizing BHF/PVDF composites via compression molding for high-frequency applications and electromagnetic shielding

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-27 DOI:10.1016/j.ceramint.2024.09.371

Moustafa A. Darwish , Nagy L. Torad , Di Zhou , Ibrahim M. Maafa , Ayman Yousef , A. Uddin , M.M. Salem

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引用次数: 0

Abstract

Electromagnetic interference (EMI) poses significant challenges to the reliable operation of communication systems, medical devices, and electronic equipment, often resulting in signal degradation, data loss, and equipment failure. To mitigate these issues, this study investigates the development of barium hexaferrite (BHF)/polyvinylidene fluoride (PVDF) composites, synthesized via compression molding, to optimize their electrical and magnetic properties for high-frequency EMI shielding applications. Through comprehensive characterization, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and vector network analysis (VNA), we demonstrate that increasing the BHF content within the composites enhances their complex permittivity, impedance matching, and attenuation coefficients, making them highly effective for EMI shielding. Notably, the composite containing 20 wt% PVDF achieved a reflection loss (RL) of −42 dB at a thickness of 2 mm, indicating superior shielding effectiveness. These results underscore the potential of BHF/PVDF composites as a viable solution for advanced EMI suppression in high-frequency electronic and military applications, combining economic feasibility with robust performance.

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通过压缩成型优化 BHF/PVDF 复合材料，用于高频应用和电磁屏蔽

电磁干扰（EMI）给通信系统、医疗设备和电子设备的可靠运行带来了巨大挑战，经常导致信号衰减、数据丢失和设备故障。为了缓解这些问题，本研究调查了通过压缩成型合成的六铁钡 (BHF) / 聚偏二氟乙烯 (PVDF) 复合材料的发展情况，以优化其在高频 EMI 屏蔽应用中的电气和磁性能。通过 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、振动样品磁力计 (VSM) 和矢量网络分析 (VNA) 等综合表征，我们证明了增加复合材料中的 BHF 含量可提高其复介电常数、阻抗匹配和衰减系数，使其成为高效的 EMI 屏蔽材料。值得注意的是，含有 20 wt% PVDF 的复合材料在厚度为 2 mm 时的反射损耗 (RL) 达到了 -42 dB，显示出卓越的屏蔽效果。这些结果表明，BHF/PVDF 复合材料兼具经济可行性和强大性能，是高频电子和军事应用中先进 EMI 抑制的可行解决方案。

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

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.