【作者】 张军；

【导师】 何秀坤；

【作者基本信息】 西安电子科技大学 ， 材料学， 2013， 硕士

【摘要】 吸波材料是隐形技术的重要组成部分，但吸收剂多为是粉体材料，需要借助黏结剂涂覆在各类使用装置上。同时，吸波材料也存在对电磁波匹配性差的问题，需要通过介质作为匹配层，来引导电磁波进入吸波材料发挥吸波材料的吸波性能。因此，制备和研究用做隐身材料粘结剂的透波匹配层介质，成为发展隐身技术的一个重要问题。本论文讲述了电介质的透波原理，建立了多层界面和全透射匹配层模型，通过Matlab计算多层界面理论反射率和电介质的电磁参数。计算结果表明，在不考虑表面粗糙度和仪器误差影响的情况下，模型的理论计算和实际测量的反射率变化趋势一致，该模型的建立为本文测量提供了理论基础。通过传输线理论以及透波材料的阻抗匹配理论，讨论了透波材料的最大匹配的条件。基于吸波材料反射率的测试平台，改变测试系统中全反射板和模具，构建了用于透波材料反射率和电磁性能参数测试体系，节约了测试时间、试剂样品消耗，并能够进行材料反射率理论计算。透波材料体系反射率通过矢量网络分析仪进行表征，电磁参数采用同轴波导法。从有机高分子材料（环氧树脂）入手，探索并优化环氧树脂作为透波材料的工艺流程，获得了一套固化体系工艺技术。制备出不同环氧树脂和固化剂比例的样品，比较了不同波段（低频，高频）的反射率，发现在整个波段环氧树脂和固化剂比例为1:1时样品的透波性能最好。探讨了匹配度和损耗以及匹配层的厚度的关系、匹配层粗糙度对透波材料的影响和热处理对样品反射率的影响，研究发现样品脱模后进行120℃的热处理能对反射率的稳定性有很大的提高。在工艺流程中气泡对样品的表面和内部的性能有很大影响，提出了通过抽真空，超声振荡，模具预热三种技术方法，提高致密度，减小气泡。更多还原

【Abstract】 Microwave absorption materials (MAM) have been an essential part of stealthaircraft. MAM exhibit the powder state. Only with the combination of binders couldthey be coated on vehicles. Meanwhile, match layer usually is used to improve theabsorbers impedance match characteristic. In this way, the electromagnetic wave couldenter the absorber extremely, and the absorbers exhibited the optimal microwaveabsorbing performance. Therefore, for stealthing MAM of match layer medium, becomethe development of stealth technology was an important problem.This paper covers the wave penetrating theory, establishment of the matching layermodel. Through the Matlab calculations multilayer interface theory of reflectivity andelectromagnetic parameters of dielectric. The calculation results show that Models oftheoretical calculation and actual measurement of reflectivity variation of the same,Without considering surface roughness and instrument error conditions. The modelprovides theoretical basis for the measurement. Through the theory of transmissionline and matched impedance theory of wave-transparent materials, discuss maximummatching condition of wave-transparent materials.The change that test system of total reflection plate and mold is based on absorbingmaterial test. Designing reflectivity of wave-transparent materials and electromagneticparameter testing system that saves test time and sample and calculates. By vectornetwork analyzer, reflectivity of wave-transparent materials and electromagneticparameters(Coaxial waveguide method) was measured.The manufacturing process of wave-transparent material is explored and optimizedbased on organic polymer materials (epoxy), and the curing system technology isachieved. Firstly, the samples, whose reflectivity is tested in different wave bands(lowfrequency and high frequency), were prepared with different proportion of epoxy resinand curing agent, and it is found that wave-transparent property of the sample is best inthe whole wave band.when the proportion of epoxy resin and curing agent being1:1.The following was examined including the ability of match, attenuation, thickness,heating treatment and roughness of match layer. The wave-transparent materials wereput on the absorbing materials It is found that the subsequent heating treatment at120℃could improve the stability of reflectivity. The introd uction of the bubbles during thetechnical process could influence the wave transparent performance. For increasing density, and reducing bubble, this paper proposed three methods: the vacuum-pumping,the ultrasonic oscillation, the mold-preheating.更多还原