材料科学
反射损耗
微波食品加热
纳米结构
阻抗匹配
烧结
纳米颗粒
吸收(声学)
光电子学
热液循环
制作
纳米技术
复合材料
化学工程
电阻抗
复合数
计算机科学
电信
工程类
电气工程
医学
替代医学
病理
作者
Guiyu Peng,Jintang Zhou,Jiaqi Tao,Weize Wang,Yijie Liu,Junru Yao,Yijie Liu,Zhengjun Yao
出处
期刊:Nano Research
[Springer Science+Business Media]
日期:2023-10-11
卷期号:17 (4): 3164-3174
被引量:26
标识
DOI:10.1007/s12274-023-6084-1
摘要
Integrated micro and nanostructures, heterogeneous components, defects, and interfaces is the way to develop high-performance microwave absorbing materials. However, there still needs to be more precise experimental routes and effective validation. In this work, by a continuous process of vacuum sintering, hydrothermal, and carbon thermal reduction, magnetic FeCo nanoparticles were successfully embedded on the hollow double-shell mesoporous SiC@C surface, thus solving the challenges of a single component loss mechanism. The hollow double-shell nanostructure introduces air to enhance impedance matching while significantly reducing the density of the material. The extensive defects and heterogeneous grain boundaries effectively enhance the polarization loss capacity. The magnetic loss mechanism introduced by the magnetic particles effectively improves the impedance matching properties of the material. The synergy of these multiple advantages has enabled the SCFC2-8 (here SiC@C@FeCo is abbreviated to SCFC, 2 represents the initial metal ion content, and 8 represents the hydrothermal time) sample to achieve an adequate absorption bandwidth of 6.09 GHz at 2.0 mm. With a minimum reflection loss of −60.56 dB, the absorption bandwidth can cover the entire C, X, and Ku bands by adjusting the matching thickness (1.3–4.0 mm). This work provides a valuable paradigm for the deeper exploitation of microwave absorption potential and guides the development of other high-performance materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI