用于微波吸收和电磁干扰屏蔽的具有增强界面损耗的异维结构
Heterodimensional structure with enhanced interface loss for microwave absorption and EMI shielding
管洪州 1王站站 1王梦奇 1翟华嶂 1曹茂盛1
作者信息
- 1. School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China
- 折叠
摘要
研究高性能的多功能电磁材料是吸波领域的挑战之一.为提高电磁波衰减能力、拓宽吸波材料的应用范围,合理设计材料结构和界面是优化其有效吸收带宽的重要途径.因此,本文采用原位刻蚀法、牺牲模板法和冷冻干燥技术成功制备了多界面、强极化的异维CuS/Ti3-C2TX复合材料.通过优化CuS/Ti3C2TX的复合比例和负载量,改进其吸波性能.CT55的最大RL可达到-54.6 dB,EAB达到4.72 GHz,几乎覆盖Ku波段.优良的吸波性能得益于CuS/Ti3C2TX的界面极化、多重散射和偶极子极化.此外,CT37还具有高达23.9 dB的屏蔽性能.将球形结构与片层结构设计为新型"异维"结构,实现了宽带微波吸收和电磁防护.
Abstract
The study of high-performance multifunctional electromagnetic materials is one of the inevitable challenges in the field of electromagnetic wave(EMW)absorption.In order to improve the attenuation ability of EMW and broaden the frequency range of absorbing materials,rational design of material structure and interface is an important way to opti-mize the effective absorption bandwidth(EAB).Therefore,enhanced-interface and strongly polarized CuS/Ti3C2TX com-posites were successfully synthesized by in-situ etching,sacri-ficial template and freeze-drying techniques.Its EMW absorption performance was improved by optimizing the hy-bridization ratio and loading content.The maximum reflec-tion loss of CuS@Ti3C2TX(mass ratio=5∶5)is-54.6 dB and the maximum EAB covering the major of Ku band is 4.72 GHz due to the interface polarization,multiple scattering and di-pole polarization.In addition,the electromagnetic inter-ference shielding performance of CuS@Ti3C2TX(mass ratio=3∶7)is up to 23.9 dB.A new heterodimensional structure was developed by the spherical structure and lamellar,which rea-lizes the broadband EMW absorption and electromagnetic protection.
关键词
heterodimensional structure/CuS/Ti3C2TX/micro-wave absorptionKey words
heterodimensional structure/CuS/Ti3C2TX/micro-wave absorption引用本文复制引用
出版年
2024
NETL
NSTL
万方数据