衰减
材料科学
复合材料
热解
反射损耗
吸收(声学)
三元运算
阻抗匹配
反射(计算机编程)
带宽(计算)
电介质
复合数
电阻抗
化学工程
光电子学
光学
计算机科学
物理
计算机网络
电气工程
程序设计语言
工程类
作者
Shuping Yu,Lixue Gai,Chunhua Tian,Li Zhu,Weikang Song,Bo Hu,Xijiang Han,Yunchen Du
出处
期刊:Carbon
[Elsevier]
日期:2024-06-24
卷期号:228: 119390-119390
被引量:9
标识
DOI:10.1016/j.carbon.2024.119390
摘要
Interfacial engineering and morphology design are two popular strategies to strengthen the performance of carbon-based composites as electromagnetic wave absorbing materials (EWAMs). Herein, we integrate their advantages simultaneously in ternary MoC/Co/C composites (SMCCs). On one hand, highly dispersed MoC and Co nanoparticles create abundant heterogeneous interfaces, and on the other hand, the spatial star-like carbon skeletons derived from ZnCo-MOF also bring significant structure contribution to EM energy consumption. EM measurement reveals that the pyrolysis temperature greatly impacts EM properties of SMCCs. After blending with paraffin (organic binder), the mixture that involves SMCC-800 (pyrolyzed at 800 ⁰C) may have both good impedance matching degree and powerful EM attenuation ability. As a result, SMCC-800/paraffin displays excellent EM absorption performance, including strong reflection loss intensity down to -67.3 dB at 16.2 GHz (thickness: 1.8 mm) and broad response bandwidth of 6.0 GHz (12.0-18.0 GHz, thickness: 2.0 mm) less than -10.0 dB, which outdo the performance of many composites with similar chemical composition ever reported. The EM absorption mechanism of SMCC-800/paraffin is comprehensively illustrated through the investigation on EM properties of the mixtures with various control samples.
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