材料科学
氮化硼
介电常数
纳米颗粒
热导率
纳米材料
电磁辐射
反射损耗
光电子学
电磁屏蔽
阻抗匹配
消散
复合材料
导电体
制作
电介质
电阻抗
复合数
纳米技术
光学
物理
电气工程
热力学
医学
病理
替代医学
工程类
作者
M.-S. Chang,Suk Jin Kwon,Jae Won Jeong,Seung Han Ryu,Seung Jae Jeong,Kyunbae Lee,Taehoon Kim,Sangsun Yang,Chong Rae Park,Byeongjin Park,Young‐Tae Kwon
标识
DOI:10.1021/acsami.2c11094
摘要
Electromagnetic wave (EMW)-absorbing materials, manufactured with composites of magnetic particles, are essential for maintaining a high complex permeability and modulated permittivity for impedance matching. However, commonly available EMW-absorbing materials are unsatisfactory owing to their low complex permeability in the high-frequency band. Herein, we report a thin, flexible EMW-absorbing membrane comprising shape-modulated FeCo nanobelts/boron nitride nanoparticles, which enables enhanced complex permeability in the S, C, and X bands (2-12 GHz). The boron nitride nanoparticles that are introduced to the FeCo nanobelts demonstrate control of the complex permittivity, leading to an effective impedance matching close to 1, consequently resulting in a high reflection loss value of -42.2 dB at 12.0 GHz with only 1.6 mm thickness. In addition, the incorporation of boron nitride nanoparticles improves the thermal conductivity for the heat dissipation of the absorbed electromagnetic wave energy. Overall, the comprehensive study of nanomaterial preparation and shape modulation technologies can lead to the fabrication of an excellent EMW-absorbing flexible composite membrane.
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