吸波材料吸波机制及吸波剂性能优劣评价方法  

The absorption mechanism of radar absorber and performance evaluation criterion of absorbent

作　　者：王涛[1] 张峻铭[1] 王鹏[1] 乔亮[1] 唐丽云[1] 薛德胜[1] 李发伸[1] WANG Tao;ZHANG Jun-ming;WANG Peng;QIAO Liang;TANG Li-yun;XUE De-sheng;LI Fa-shen(Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University, Lanzhou 730000, China)

机构地区：[1]兰州大学物理技术学院兰州大学磁学与磁性材料教育部重点实验室,甘肃兰州730000

出　　处：《磁性材料及器件》2016年第6期7-13,共7页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(11204115;11574122)

摘　　要：吸波材料已被广泛应用于民用领域的抗电磁干扰和国防领域的雷达波隐身。吸波材料通常由吸收剂和粘接剂复合而成,其吸波性能由复合材料的电磁参数和吸波材料的厚度共同决定。为了提高吸波材料的吸波性能,近年来不同类型的吸收剂,包括磁性铁氧体颗粒、磁性金属颗粒、碳材料、磁性颗粒/碳材料复合物得到广泛研究,但吸波材料在"薄、轻、宽、强"综合目标的实现上却进展不大,其主要原因是研究者在有关吸波材料的吸波机制及吸收剂性能优劣的评价标准上没有达成科学共识。本文介绍了吸波材料随厚度变化的吸波特征,根据最近的实验和计算结果阐明了吸波材料的吸波机制,基于吸波机制提出了吸收剂性能优劣的评价方法。期望通过对吸波材料吸波机制以及吸收剂性能优劣评价方法的讨论,促进吸波材料的研究和应用取得实质进展。The absorbing technique has been applied in civil field for preventing electromagnetic interference among electric devices and in national defense for radar wave stealth.The absorbing material is usually composed of absorbent and adhesive.Its absorbing performance is determined by its electromagnetic parameters and thickness.In recent years,different types of absorbents,such as magnetic ferrite particles,magnetic metal particles,carbon material and magnetic particles/carbon compound have been reported to get an absorber with“thinness,lightness,width and strength”.However,the progress for this goal is hardly achieved.The reasons are that the researchers have not reached an agreement on the absorption mechanism of radar absorber and the performance evaluation criterion of absorbent.This paper firstly introduces the dependence of absorption characteristics on absorber thickness.Then,the absorption mechanism is described according to results of our recent experiments and calculations.Based on the absorbing mechanism,the criterion for evaluating the performance of an absorbent is presented.Through this work,we expect that the substantial progress of absorber research and application can be achieved in the future.

关 键 词：吸波材料 磁导率 介电常数 厚度 匹配 性能评价 

分 类 号：TM25[一般工业技术—材料科学与工程]