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Electrical behaviour of a silicone elastomer under simulated space environment

Roggero, Aurélien and Dantras, Eric and Paulmier, Thierry and Tonon, Claire and Balcon, Nicolas and Rejsek-Riba, Virginie and Dagras, Sabine and Payan, Denis Electrical behaviour of a silicone elastomer under simulated space environment. (2015) Journal of Physics D: Applied Physics, 48 (13). 1-10. ISSN 0022-3727

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Official URL: http://dx.doi.org/10.1088/0022-3727/48/13/135302

Abstract

The electrical behavior of a space-used silicone elastomer was characterized using surface potential decay and dynamic dielectric spectroscopy techniques. In both cases, the dielectric manifestation of the glass transition (dipole orientation) and a charge transport phenomenon were observed. An unexpected linear increase of the surface potential with temperature was observed around Tg in thermally-stimulated potential decay experiments, due to molecular mobility limiting dipolar orientation in one hand, and 3D thermal expansion reducing the materials capacitance in the other hand. At higher temperatures, the charge transport process, believed to be thermally activated electron hopping with an activation energy of about 0.4 eV, was studied with and without the silica and iron oxide fillers present in the commercial material. These fillers were found to play a preponderant role in the low-frequency electrical conductivity of this silicone elastomer, probably through a Maxwell–Wagner–Sillars relaxation phenomenon.

Item Type:Article
Additional Information:Thanks to IOP Publishing editor. The definitive version is available at http://iopscience.iop.org The original PDF of the article can be found at IOP Publishing website : http://iopscience.iop.org/0022-3727/48/13/135302/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Airbus (FRANCE)
French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:26 Jun 2015 09:14

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