Temperature and Field Induced Variations of Electric Conductivities of HTV Silicone Rubbers Derived from Measured Currents and Surface Potential Decay Characteristics

Shahid Alam, Yuriy V. Serdyuk and Stanislaw M. Gubanski
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Shahid Alam: Department of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
Yuriy V. Serdyuk: Department of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
Stanislaw M. Gubanski: Department of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden

Energies, 2020, vol. 13, issue 11, 1-10

Abstract: The temperature and field dependencies of electric conductivities of two types of silicone rubber-based polymers intended for use in high voltage direct current applications are presented and discussed. The conductivities obtained with the standard method by measuring a current through the material sample placed between metallic electrodes in response to the applied voltage are compared with those deduced from the measured potential decay on pre-charged material surface in an open circuit configuration. The measurements were conducted in the range of the applied electric field strength (0.5–5) kV/mm and temperatures ranging from 22 °C to 70 °C. It is shown that the values of the conductivities obtained by the two methods are in agreement and their temperature dependences obey Arrhenius law yielding similar activation energies.

Keywords: silicone rubber; electric conductivity; charging current; surface potential decay; activation energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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