核壳结构吸波材料的研究进展  

Progress on microwave absorption materials with core-shell structure

作　　者：杨盛[1,2,3] 游文彬 裘立成 车仁超 杨士军[1,2,3] Sheng Yang1,2,3, Wenbin You1,2,3, Licheng Qiu1,2,3, Renchao Che1,2,3, Shijun Yang1,2,3(a Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China; 2 Department of Materials Science, Fudan University, Shanghai 200438, China; 3 Collaborative Innovation Center of Chemistry for Energy Materials （iChEM）, Fudan University, Shanghai 200438, China)

机构地区：[1]复旦大学先进材料实验室,上海200438 [2]复旦大学材料科学系,上海200438 [3]复旦大学能源材料化学协同创新中心,上海200438

出　　处：《科学通报》2018年第8期712-724,共13页Chinese Science Bulletin

基　　金：国家自然科学基金(11727807;51725101;51672050;61790581);上海市材料基因组工程研究院(16DZ2260600)资助

摘　　要：为应对生产生活中电磁干扰问题,同时满足军事中隐形技术的应用要求,发展综合性能优异的微波吸收材料具有重要意义.近些年来,包括本课题组在内的多个研究单位发现核壳结构拥有优异吸波性能,这是由于核壳结构材料的复合阻抗匹配、界面电荷极化、多级结构界面散射等在拓宽吸收频段、增加吸收强度等方面有着显著效果.与此同时,研究人员在核壳结构吸波材料的吸波机理方面也取得了突出进展,对设计新颖结构来满足吸波材料提出的包括"薄、轻、宽、强、热"在内的新挑战具有突出贡献.Microwave absorber is a kind of functional material, which can absorb electromagnetic （EM） wave effectively and then convert EM energy into thermal energy or make EM wave dissipate by interference. The researches of microwave ab- sorbers are important to satisfy the need of electromagnetic interference in daily life and industrial production, also meet the application requirements of stealth technology in military. Nowadays, the rapid increase in the use of telecommunica- tions equipment, digital systems, and fast processors result in the increasing demand for the development of novel high-efficient microwave absorbers with light weight, thin thickness, wide absorption frequency, and strong absorption characteristics. The structures of microwave absorber are found closely related to the absorption properties. In recent years, many research institutions including our research group, found that the core-shell structure has good absorption performance. The core-shell structured nanocomposites, which combined functionalities of cores and shells, show great potential for significant effect on broadening the absorption spectrum and increasing the absorption intensity because of the complex impedance material matching, interface polarization and multi structure interface scattering. For example, the combination of magnetic materials （e.g., Fe304, Co, Ni） and dielectric materials （e.g., TiO2, SnO2, carbon nanotubes） in one entity may take advantages of both the magnetic and dielectric materials, which then can be used as high-performance microwave absorbers. It is well known that Fe304, which have been widely used as microwave ab- sorbers because of low cost and strong absorption characteristics usually suffer from ease of oxidation at high-tempera- ture and relatively narrow absorption frequency bandwidth at applied frequency range. While, the magnetic nanoparticles encapsulated within carbon-nanotube composites and Fe304/TiO2 core/shell nanotubes were found with lower reflection loss and wider absorption fr

关 键 词：电磁干扰 隐身技术 微波吸收材料 核壳结构 吸波机理 

分 类 号：TB34[一般工业技术—材料科学与工程]