层状无机物和石墨复合涂层的吸波特性研究  

RESEARCH ON MICROWAVE ABSORBING PROPERTIES OF COMPOSITE COATINGS MADE BY LAYERED INORGANICS AND GRAPHITE

作　　者：侯进[1] 陈国华[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100

出　　处：《红外与毫米波学报》2008年第3期202-204,共3页Journal of Infrared and Millimeter Waves

基　　金：国家重点基础研究发展规划973计划基金资助项目(2003CB615706)

摘　　要：首次采用层状无机物作为吸波剂与石墨吸波剂复合,制备出了双层复合吸波涂层.层状无机物的复磁导率的实部μ′≈1,虚部μ″≈0,说明它是一种介电损耗型吸收材料,通过介电损耗来吸收和衰减电磁波.并探讨了底层层状无机物和表层石墨用量对吸波性能的影响,实验结果表明:增加表层或底层吸波剂含量,均能使吸波性能曲线向低频端方向移动,反之,吸波性能曲线向高频端方向移动.当底层层状无机物和表层石墨的质量分数分别为11.0%和16.6%时,制得了最大反射损耗为-22.27dB的双层复合涂层,其中小于-5dB和-10dB的频宽分别为5.36GHz和3.12GHz.Double-layer composite absorbing coatings were made by using layered inorganics as an absorbing reagent combined with graphite. Layered inorganics belongs to a dielectric loss absorbing material since its complex permeability＇ s real part μ′≈ 1 and imaginary part μ＂ ≈0, and it absorbs and attenuates electromagnetic wave via dielectric loss. The influences of dosages of layered inorganics in the bottom layer and graphite in the surface layer on microwave absorbing properties were studied. The results show that the absorption peak values shift to lower frequency by increasing dosages of absorbing reagents, otherwise shift to higher frequency. When the double-layer composite absorbing coating is prepared with amount of 11.0 wt. % layered inorganics and 16.6 wt. % graphite, the maximum reflection loss reaches -22.27dB and the absorption bandwidths are 5.36GHz （ under - 5dB） and 3.12GHz （ under - 10dB）.

关 键 词：吸波特性 层状无机物 弓形测试法 石墨 

分 类 号：TM25[一般工业技术—材料科学与工程]