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Electrical Conductivity of a Space-Used Silicone Elastomer: Evolution Under Electron Irradiation

机译:空间使用的有机硅弹性体的电导率:电子辐照下的演化

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摘要

The electrical conductivity of a space-used commercial silicone adhesive has been measured and its temperature dependence evidenced. It was shown to obey an Arrhenius law with an activation energy of 0.4 eV, associated with an electron-hopping transport. In parallel, this material was deprived from its fillers in the laboratory, and the dc conductivity of the resulting polysiloxane matrix was shown to obey the same Arrhenius law as the filled material. When exposed to high-energy electrons, the dc conductivity of both materials decreases, probably due to a predominant chain cross-linking process. For the highest experimental ionizing dose, the dc conductivity of this commercial silicone elastomer fell from 6 x 10(-13) down to 2 x 10(-16) S . m(-1). Consequently, the associated electrostatic discharge triggering risk in space applications moved from safe to critical.
机译:已测量了一种市售的有机硅粘合剂的电导率,并证明了其对温度的依赖性。结果表明,它遵循阿伦尼乌斯定律,其激活能为0.4 eV,与电子跳跃传输相关。同时,在实验室中将该材料从填充剂中剥夺,所得聚硅氧烷基体的直流电导率符合与填充材料相同的阿伦尼乌斯定律。当暴露于高能电子时,两种材料的直流电导率都会降低,这可能是由于主要的链交联过程所致。对于最高的实验电离剂量,这种商用有机硅弹性体的直流电导率从6 x 10(-13)S降至2 x 10(-16)S。 m(-1)。因此,在太空应用中引发静电的相关风险已从安全变为严重。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2016年第6期|1114-1118|共5页
  • 作者单位

    Off Natl Etud & Rech Aerosp, Space Environm Dept, F-31055 Toulouse, France;

    Off Natl Etud & Rech Aerosp, Space Environm Dept, F-31055 Toulouse, France;

    Off Natl Etud & Rech Aerosp, Space Environm Dept, F-31055 Toulouse, France;

    Off Natl Etud & Rech Aerosp, Space Environm Dept, F-31055 Toulouse, France;

    Univ Paul Sabatier, Inst Carnot CIRIMAT, Phys Polymeres, F-31062 Toulouse, France;

    Airbus Def & Space, Telecom Business Div, F-31402 Toulouse, France;

    Airbus Def & Space, Mat & Proc Div, F-31402 Toulouse, France;

    Ctr Natl Etud Spatiales, Spacecraft Technol Design & Integrat Dept, F-31400 Toulouse, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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