Study on degradation of germanium coating on Kapton used for spacecraft sunshield application
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
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| Title |
Study on degradation of germanium coating on Kapton used for spacecraft sunshield application
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| Creator |
Esther, ACM
Dey, Arjun Sridhara, N Yougandar, B Bera, Parthasarathi Anandan, C Rangappa, D Sharma, AK |
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| Subject |
Chemistry and Materials (General)
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| Description |
Sunshield membranes made of germanium coated black polyimide (GBP) or Kapton are often used on the
reflector/transmitter antenna of satellites for thermal control applications. However, the germanium top layer is
prone to degrade during ground storage and implementation. Hence vacuum/inert gas sealed packaging is required for storing the membranes, followed by a staggered fabrication schedule as the shelf-life of the GBP is identified as only ~ 6 months. In the present study, microstructural, thermo-optical and electrical properties along with XPS studies for evaluating oxidation states of the as-received and degraded GBP films have been investigated thoroughly. The radio frequency (RF) loss behaviour of both the films has also been studied for S
band (2.5 GHz- 3.5 GHz), Ku band (10.5 GHz- 14.5 GHz) and Ka Band (30 GHz- 35 GHz).
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| Publisher |
CHEMIE.DE Information Service GmbH
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| Date |
2015-11-20
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/12467/1/ja735.pdf
Esther, ACM and Dey, Arjun and Sridhara, N and Yougandar, B and Bera, Parthasarathi and Anandan, C and Rangappa, D and Sharma, AK (2015) Study on degradation of germanium coating on Kapton used for spacecraft sunshield application. Surface and Interface Analysis , 47 (13). p. 1155. |
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| Relation |
http://dx.doi.org/ 10.1002/sia.5867
http://nal-ir.nal.res.in/12467/ |
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