Surface Ageing of Dielectric Materials in a Controlled Atmosphere: a Raman Microprobe Study


Freebody, N and Vaughan, A S (2010) Surface Ageing of Dielectric Materials in a Controlled Atmosphere: a Raman Microprobe Study. In, 2010 Conference on Electrical Insulation and Dielectric Phenomena, Purdue University, West Lafayette, Indiana, USA, 17 - 20 Oct 2010. IEEE, 54-57.

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Description/Abstract

This paper takes a novel approach to the problem of characterising electrical ageing in solid dielectrics through exsitu experiments that seek to reproduce the chemistry of electrical treeing in bulk. Plaque specimens of a range of polymers, including polyethylene, polystyrene, polyether ether ketone and silicone rubber, were subjected to surface ageing via corona discharge in air or in a closed cell where the atmosphere can be controlled and adjusted. The residual products on both the sample surface and the high voltage electrode were characterised by Raman microprobe spectroscopy and the resulting fingerprints were compared with those previously identified within electrical trees. Analysis of the electrodes aged in air and nitrogen revealed varying evidence of sp2 hybridized carbon, and fluorescence, both of which are products previously associated with the processes involved in electrical treeing. The significance of the results is discussed with respect to electrical treeing.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 17 - 20 October 2010
ISSNs: 0048-9162
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science
Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE
ePrint ID: 271636
Date Deposited: 18 Oct 2010 20:28
Last Modified: 27 Mar 2014 20:17
Publisher: IEEE
Contact Email Address: asv@ecs.soton.ac.uk
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/271636

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