中国空间科学技术

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新型星用导电型 Kapton 基热控材料

卢榆孙,冯煜东,翟厚明   

  1. 兰州物理研究所
  • 发布日期:1998-08-25

A NEW CONDUCTIVE THERMAL CONTROL MATERIAL WITH KAPTON SUBSTRATE FOR SATELLITE

Lu Yusun Feng Yudong Zhai Houming (Lanzhou Institute of Physics,Lanzhou 730000)   

  • Published:1998-08-25

摘要： 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。

关键词: 热控, 材料, 薄膜, 充电, 放电

Abstract: In this article,a new conductive thermal control material with Kapton substrate has been described.Its conductive coating is TO (Tin Oxide) film.The TO film has an excellent transmittance in the visual and near infrared range and its surface resistance is from10 4 to 10 6Ω.After being UV radiated for 8200h,the solar absorbance α s of the TO/Kapton/Al thermal control material displays a little change and its relative change Δ α s/α s is 6 7%.After the TO/Kapton and Kapton was radiated for 8000 hours in UV radiation,the results indicate that the TO film has the ability to resist UV radiation.It is shown that our TO films deposited in special deposition condition have an ability to resist UV radiation.After cycling 100 times from -196℃ to +100℃,the change of α s can be neglected and R s increases to about double the past value.The sample had been put down for 24h under R H >95%、(50±2)℃,the film of Al and TO has no change and is not peeled off the Kapton.These results thoroughly indicate that the new thermal control materials have the excellent environmental stability.At the end of the paper,the measurements of uniformity of α s on a product with a width of 0 5m and a length of 6m have been given.