热解碳基泡沫结构应用于热真空吸波箱技术研究  

Research on the application of pyrolytic carbon-based foam structure to thermal vacuum absorbing box

作　　者：李处森[1] 秦家勇[2] 林立海 许卫刚[1] 杜春林[2] 张劲松[1] LI Chusen;QIN Jiayong;LIN Lihai;XU Weigang;DU Chunlin;ZHANG Jinsong(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China)

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2023年第6期669-676,共8页Spacecraft Environment Engineering

摘　　要：针对卫星通信系统考核用热真空吸波箱对结构吸波材料的需求,文章采用前驱体法和热解工艺制备了以热解碳为基体的轻质泡沫结构吸波材料。性能测试结果表明:该材料不仅适用于高真空、高低温循环热真空吸波箱环境,而且具有适合尖锥型高效吸波结构设计的宽频带、宽温域高介电损耗的电磁特性。在此工作基础上,以开展无源互调(PIM)吸波箱研制为例,分别建立电磁波室温远场平面波照射仿真模型和吸波箱内宽温域电磁波近场球面波照射仿真模型。综合两模型仿真结果,确定了该吸波材料尖锥+底板结构的具体尺寸。结果表明其吸波性能满足国军标的考核要求。In order to meet the demand of structural absorbing materials for thermal vacuum absorbing box used in the satellite communication system examination,a lightweight pyrolytic carbon-based foam structural absorbing material was prepared by precursor method and pyrolysis process in this article.The performance test results show that the material is not only suitable for high vacuum,high and low temperature cycling in thermal vacuum absorbing box,but also is with electromagnetic characteristics in wide frequency band,wide temperature range,and high dielectric loss,which is suitable for the design of high efficient sharp cone absorbing structure.On the basis of this work,taking the development of a passive intermodulation(PIM)absorbing box as an example,simulation models of electromagnetic wave far-field plane wave irradiation at room temperature and electromagnetic wave near-field spherical wave irradiation at wide temperature range were established respectively.Based on the simulations of the two models,specific dimensions of sharp cone+bottom plate structure of the absorbing material were determined.The results indicate that its absorbing performance meets the assessment requirements of the national military standard of China.

关 键 词：吸波材料 热真空吸波箱 热解碳基 热真空环境适应性 电磁特性 仿真模型 

分 类 号：V416.8[航空宇航科学与技术—航空宇航推进理论与工程] V443.4[一般工业技术—材料科学与工程] V250.3[航空宇航科学与技术—航空宇航制造工程]