基于PS球的银微米结构制备及二次电子发射性能

发布时间：2018-06-27 17:35

本文选题：微放电 + 二次电子发射　；参考：《稀有金属材料与工程》2017年09期

【摘要】：金属材料的二次电子发射是空间微波部件发生微放电效应的重要机制,微放电效应是航天器有效载荷射频功率增大的限制因素。本实验通过在金属银表面构造大尺度聚苯乙烯(PS)微球阵列制备微米尺度的银膜陷阱结构,实现对二次电子发射的抑制。重点研究了PS微球自组装方法对自组装效果的影响及镀银方式对银膜陷阱结构形貌的影响,并对利用PS微球构造的银膜陷阱结构的二次电子发射性能进行研究。结果表明:蒸发沉积法中的单基片法可有效实现PS微球的自组装,电化学沉积法镀银可获得银膜陷阱结构,且该银膜陷阱结构的二次电子发射系数最大值从2.2降低至1.6。
[Abstract]:The two electron emission of metal materials is an important mechanism for the micro discharge effect of space microwave components. The micro discharge effect is a limiting factor for the increase of the RF power of the spacecraft's effective load. In this experiment, the micrometer scale silver membrane trap structure was prepared by constructing a large scale polystyrene (PS) microsphere array on the metal silver surface, and the two electric power was realized. The effect of self-assembly of PS microspheres on the self-assembly effect and the influence of the silver plating on the structure and morphology of the silver membrane trap are emphatically studied. The two electron emission properties of the silver membrane trap structure using PS microspheres are studied. The results show that the single substrate method in the evaporation deposition method can effectively realize the self microspheres of the PS microspheres. The silver film trap structure can be obtained by electrodeposition and silver plating. The maximum two electron emission coefficient of the silver film trap structure is reduced from 2.2 to 1.6.
【作者单位】：西安交通大学;中国空间技术研究院空间微波技术重点实验室;陕西科技大学;
【基金】：空间微波技术重点实验室基金资助(9140C530101130C53013,9140C530101140C53231)
【分类号】：TG178

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