透波材料的高温介电性能测试与分析  

MEASUREMENT AND ANALYSIS FOR THE COMPLEX PERMITTIVITY OF DIELECTRIC MATERIALS AT HIGH TEMPERATURE

作　　者：徐银芳[1] 张利嵩[1] 张喦 梁欢[1] XU Yin-fang ZHANG Li-song ZHANG Yan LIANG Huan(Hypersonic Vehicle Thermal Protection ＆Insulation Technology Center, Beijing Institute of Space Long March Vehicle, Beijing 100076, China)

机构地区：[1]北京航天长征飞行器研究所,高超声速飞行器防隔热技术中心,北京100076

出　　处：《玻璃钢／复合材料》2016年第10期70-74,共5页Fiber Reinforced Plastics/Composites

摘　　要：详细分析了基于终端短路波导法材料高温介电性能的测试方法,给出了几种典型透波材料从室温到1600℃的高温介电性能测试与分析结果。由结果可知,由于表面吸附水和体内物理水的存在,一般在1000℃以前,随着温度升高,水分挥发或蒸发,复合材料的介电常数ε和损耗角正切tanδ会有所减小;当温度升至1000℃,由于材料中所吸附的水分基本挥发完全,ε和tanδ降到最小值;当温度高于1000℃时,由于复合材料在制备过程中会引入微量杂质,随着温度升高这些微量杂质开始电离,并产生粒子电导,所以导致ε和tanδ均有较大幅度的上升。本文实测数据可以用于高超声速电磁窗材料透波性能的研究与应用。Complex permittivity measurements at high temperature by short waveguide method were obtained,and the measurement and analysis results of some typical dielectric materials from room temperature to 1600 ℃ were given. The results show that,before 1000 ℃,the dielectric constant and the loss angle tangent of composite material will decrease with the increase of temperature,due to the presence of the surface water adsorbed and in vivo physical water. When the temperature is rising to 1000 ℃,dielectric constant and loss angle tangent decreases to minimum,which shows that composite materials in the absorbed water volatile completely. When the temperature is above 1000 ℃,the dielectric constant and loss angle tangent are greatly increased because of the trace impurities introduced in the preparation of composite materials,which will ionize and generate particle conductance with increasing temperature. The measurement methodology and considerations can be used in the study of hypersonic electromagnetic windows.

关 键 词：高温 介电性能 测试 短路波导法 

分 类 号：TB332[一般工业技术—材料科学与工程]