电子通量对ZnO/K_2SiO_3热控涂层光学性能的影响  

Electron flux effects on the optical properties of ZnO/K_2SiO_3 thermal control coating

作　　者：王旭东[1] 何世禹[1] 杨德庄[1] 

机构地区：[1]哈尔滨工业大学空间材料与环境工程实验室,黑龙江哈尔滨150001

出　　处：《强激光与粒子束》2002年第3期476-480,共5页High Power Laser and Particle Beams

基　　金：国家重点基础研究专项经费资助课题 (G19990 65 0 )

摘　　要：研究了电子通量对 Zn O/ K2 Si O3热控涂层光学性能的影响。分别采用通量为 5× 10 1 1 / cm2·s,8× 10 1 1 / cm2 · s,1× 10 1 2 / cm2 · s和 5× 10 1 2 / cm2 · s的电子对试样进行辐照。电子辐照下涂层的光学性能发生了退化 ,并且发现了退化涂层在空气中的“漂白”现象。分析了 Zn O/ K2 Si O3热控涂层光学性能的退化机制 ,同时讨论了电子通量对太阳光谱吸收系数的影响。实验结果发现 ,在 5× 10 1 1～ 1× 10 1 2 / cm2·s的电子通量范围内 ,电子通量对 Zn O/ K2 Si O3热控涂层光学性能的影响相同。因此在这个电子通量范围内 ,采用加速地面试验来模拟空间的电子辐照效应是有效的。The effects of electron flux on the optical properties of ZnO/K 2SiO 3 thermal control coating are studied. The test specimens were exposed to electrons at a flux of 5×10 11 /cm 2·s, 8×10 11 /cm 2·s, 1×10 12 /cm 2·s and 5×10 12 /cm 2·s, respectively. The irradiation caused an optical degradation of the coatings. And an air bleaching phenomenon of the degraded coatings was observed. Mechanisms for optical degradation of ZnO/K 2SiO 3 thermal control coating are analyzed. The influence of electron flux on solar absorptance is also discussed. It is found that in the electron flux range of 5×10 11 to 1×10 12 /cm 2·s, there are no different electron flux effects on the optical properties of ZnO/K 2SiO 3 thermal control coating. Accordingly, in this range the accelerated ground-based testing to simulate electron exposure effects of space is validated.

关 键 词：电子通量 ZnO/K2SiO3 电子辐照 热控涂层 光学性能 空间环境 航天器 氧化锌 地面模拟试验 亚硫酸钾 热控制系统 

分 类 号：V250.2[一般工业技术—材料科学与工程] V444.36[航空宇航科学与技术—航空宇航制造工程]