摘要
根据电磁波传播规律,设计了具有阻抗渐变结构的三层平板吸波体．面层由二氧化钛材料组成,易于实现与空气波阻抗匹配,且起到一保护屏作用；底层为强磁损耗体,由铁、钴等原料,经球磨而制得的磁性微粉,形成对电磁波强大的损耗；中间层为过渡层,构成从面层、中间层、底层的阻抗渐变结构．采用磁性微粉与碳纤维按一定比例混合,因而还具有一定的电磁损耗能力．实验结果表明,三层吸波体反射率在-8dB以下((8～18)GHz),拉伸强度10．8MPa,剥离强度75．2 N/cm,满足一定的工程应用．
Based on the electromagnetic wave propagation laws, a three-layered sheet radar （microwave） absorbing system with the impedance-graded structure was designed. The surface layer, composed of TiO2, easily realizes matching to the free space and protection from destroying. The last layer, made up of magnetic micropowder （MMP） ballmilled from Fe, Co, etc, has significant absorbing effects. The medium layer, comprised of MMP and carbon fibers, forms the impedancegraded structure from the surface to the last layer. The results of experimental measurement show that reflectivity for the three-layer absorber is below -8dB in the frequency range of （8-18）GHz. Tensile strength is 10.8MPa, and peeling strength is 75.2N/cm, satisfying the use of engineering.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期1449-1453,共5页
Journal of Inorganic Materials
基金
国防预研重点项目
关键词
阻抗匹配
磁性微粉
反射率
拉伸强度
impedance matching
MMP
reflectivity
tensile strength
