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介绍了一种新型导电型Kapton基热控材料,其导电层采用了TO(氧化锡)膜。这种TO膜具有很高的光学透明度,方阻在104Ω~106Ω范围内,可有效地抑制卫星表面的充放电现象。经过8200h太阳当量紫外辐照后,TO/Kapton/Al热控材料的αs相对变化率Δαs/αs仅为6.7%。在TO/Kapton与Kapton试样的8000h的紫外辐照对照实验中,表明TO膜具有明显的紫外辐射防护功能。在-196℃~+100℃冷热循环100次试验后,αs几乎无变化,膜电阻值仅增大一倍,在RH>95%、(50±2)℃环境下放置24h后,试样膜面无变化,也没有膜与Kapton基底相剥离的现象发生。最后给出长6m,宽0.5m的产品上αs的分布测量结果,表明产品的αs均匀性是好的。
A new type of conductive Kapton-based thermal control material is introduced. Its conductive layer is TO (tin oxide) film. This TO film has a high optical transparency, square resistance in the range of 104Ω ~ 106Ω, which can effectively suppress the charging and discharging of the satellite surface phenomenon. After 8200h solar equivalent UV irradiation, the TO / Kapton / Al thermal control material has a relative rate of change Δαs / αs of only 6.7%. In the 8000h ultraviolet irradiation control experiment of TO / Kapton and Kapton samples, it showed that the TO film has a significant ultraviolet radiation protection function. At -196 ℃ to +100 ℃ after 100 cycles of hot and cold cycle, αs almost no change in the membrane resistance value only doubled, RH> 95%, (50 ± 2) ℃ environment for 24h, the sample film No change in the surface, nor the peeling of the Kapton substrate. Finally, the measurement results of the distribution of αs on the product 6m long and 0.5m wide are given, which shows that the αs homogeneity of the product is good.