The Study of Simulated Space Radiation Environment Effect on Conductive Properties of ITO Thermal Control Materials

  • Feng Wei-Quan
  • Zhao Chun-Qing
  • Shen Zi-Cai
  • Ding Yi-Gang
  • Zhang Fan
  • Liu Yu-Ming
  • Zheng Hui-Qi
  • Zhao Xue
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 32)

Abstract

In order to prevent detrimental effects of ESD caused by differential surface charging of spacecraft under space environments, an ITO transparent conductive coating is often deposited on the thermal control materials outside spacecraft. Since the ITO coating is exposed in space environment, the environment effects on electrical property of ITO coatings concern designers of spacecraft deeply. This paper introduces ground tests to simulate space radiation environmental effects on conductive property of ITO coating. Samples are made of ITO/OSR, ITO/Kapton/Al and ITO/FEP/Ag thermal control coatings. Simulated space radiation environment conditions are NUV of 500ESH, 40 keV electron of 2 × 1016 е/cm2, 40 keV proton of 2.5 × 1015 p/cm2. Conductive property is surface resistivity measured in-situ in vacuum. Test results proved that the surface resistivity for all ITO coatings have a sudden decrease in the beginning of environment test. The reasons for it may be the oxygen vacancies caused by vacuum and decayed RIC caused by radiation. Degradation in conductive properties caused by irradiation were found. ITO/FEP/Ag exhibits more degradation than other two kinds. The conductive property of ITO/kapton/Al is stable for vacuum irradiation. The analysis of SEM and XPS found more crackers and less Sn and In concentration after irradiation which may be the reason for conductive property degradation.

Keywords

Space environment effects Space environment Surface charging Electrical surface resistivity Thermal control materials In-situ measurement Testing evaluation 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Feng Wei-Quan
    • 1
  • Zhao Chun-Qing
    • 1
  • Shen Zi-Cai
    • 1
  • Ding Yi-Gang
    • 1
  • Zhang Fan
    • 1
  • Liu Yu-Ming
    • 1
  • Zheng Hui-Qi
    • 1
  • Zhao Xue
    • 1
  1. 1.Beijing Institute of Spacecraft Environment EngineeringBeijingChina

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