核壳结构电磁波吸收材料研究进展

doi:10.11896/cldb.19030134

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Abstract Microwave communication technology has been greatly developed and widely used, which facilitates people’s life. At the same time, a large number of electromagnetic waves also pollute the environment and threaten people’s health. Electromagnetic wave-absorbing materials, also known as wave-absorbing materials, can absorb the excess and leakage electromagnetic wave energy, which has very important economic value and social benefits in the treatment of electromagnetic wave pollution. In addition, in the field of military industry, radar stealth aircrafts, missiles, combat command vehicles and other military equipments also have a very urgent demand for wave-absorbing materials, which not only requires that the wave-absorbing materials have the characteristics of thin, light, wide and strong, but also requires high temperature resistance, oxidation resistance and high strength.
Due to the single loss mechanism of traditional wave-absorbing materials, such as ferrite, carbonyl iron, conductive carbon black, the absorption band is narrow and the absorption capacity is not strong enough. Composite treatment becomes a necessary means to obtain excellent wave-absorbing materials. The multilayer macroscopic scale structure matching is usually adopted to achieve the purpose of wide band absorption. However, the matching thickness of wave-absorbing materials obtained by this method is large, and the applicable fields are very limited. It is difficult to meet the requirements of thin, light, wide and strong of wave-absorbing materials at the same time. With the development of nanotechno-logy, the design and fabrication of materials have been extended to the atomic level. People try to improve the impedance matching and loss ability of wave-absorbing materials on nanoscale. The core-shell structure wave-absorbing materials have gradually become a research hotspot in this field because of their high degree of freedom in structure design and excellent performance.
In recent years, the research on core-shell structure wave-absorbing materials is mainly based on the essential properties of the materials. The materials with different loss characteristics are used to composite. Combining with the design of the microstructure and morphology of the mate-rials, the impedance matching characteristic and the effective bandwidth of the wave-absorbing materials are improved. Among them, materials with hollow core-shell structure and anisotropy, such as two-dimensional flake, nanoflower, nanotube, exhibit better wave-absorbing properties. In addition, ceramic materials and heat-resistant resins can be selected as shell materials to meet the requirements of high temperature and oxidation resistance of wave-absorbing materials. At present, although there are many reports on core-shell structure wave-absorbing materials, the research system of core-shell structure wave-absorbing materials has not been unified, and the regulation mechanism still needs to be further stu-died.
In this paper, based on the latest research progress of core-shell structure wave-absorbing materials, we introduced the reported types of core-shell structure wave-absorbing materials, and analyzed the microcosmic regulation mechanism and preparation methods of core-shell structure wave-absorbing materials. Finally, the development of core-shell structure wave-absorbing materials was summarized and prospected.

Key words： wave-absorbing materials core-shell structure classification microcosmic regulation mechanism preparation methods

Published: 10 April 2020

CLC number:

TM25

About author:: Zhennan Yangreceived her bachelor's degree in engineering from Henan University of Urban Construction in 2016.She is currently pursuing her master's degree at the College of Material Science and Engineering, Chongqing University, under the supervision of Prof. Fang Liu. She has been a guest graduate student of Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences since July 2017. Her research has focused on the application of nanocompo-sites in the field of electromagnetic wave absorption.
Fang Liureceived her B.E. degree in college of buil-ding materials from Chongqing University of Building Engineering in 1986 and received her master's degree from Chongqing University of Building Engineering in 1992, as a visiting scholar,visited the Montana State University at Western Transportation Institute for research from July 2010 to July 2011,she is currently a full professor in Chongqing University.Her research interests are building materials, she has achieved remar-kable results in the comprehensive utilization of various types of chemical gypsum, especially phosphogypsum. She has undertaken or participated in many national, provincial and horizontal research projects, and has obtained the first prize of science and technology progress of the China Petroleum and Chemical Industry Association two times.

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	YANG Zhennan
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Cite this article:

YANG Zhennan,LIU Fang,LI Chaolong, et al. Research Progress of Electromagnetic Wave Absorbing Materials with Core-Shell Structure[J]. Materials Reports, 2020, 34(7): 7061-7070.

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http://www.mater-rep.com/EN/10.11896/cldb.19030134 OR http://www.mater-rep.com/EN/Y2020/V34/I7/7061

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