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Tracking resistance of nanocomposites of HDPE and TiO2 nanoparticles

Electrical tracking is a phenomenon that starts on the surface of materials subjected to high and divergent electrical field stress, causing deterioration in their insulation capability. The aim of this study was to evaluate the effect of different particle sizes and concentrations of TiO 2 filler (...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2017-12, Vol.24 (6), p.3515-2521
Main Authors: Ladeira, Natalia E., de M Furtado, Jose G., Visconte, Leila L. Y., Pacheco, Elen B. A. V.
Format: Article
Language:English
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Summary:Electrical tracking is a phenomenon that starts on the surface of materials subjected to high and divergent electrical field stress, causing deterioration in their insulation capability. The aim of this study was to evaluate the effect of different particle sizes and concentrations of TiO 2 filler (2 and 5 wt.%) in a high-density polyethylene (HDPE) composites on the electrical tracking process. The nanocomposites, obtained by extrusion, were characterized by scanning electron microscopy (SEM). The nanocomposites with the lowest filler concentration (2 wt.%) presented the best dispersion in the HDPE matrix, as confirmed by SEM, and the best electrical tracking results compared to the nanocomposites with 5wt.% of TiO 2 . The unfilled HDPE and the nanocomposite containing 2wt.% TiO 2 with the smallest particle size were submitted to accelerated aging in an ultraviolet light chamber. The nanocomposite before and after aging presented resistance to tracking greater than 2.5 kV, indicating the possibility of applying this material in accessories of power distribution networks, such as electrical polymer crossarms.
ISSN:1070-9878
DOI:10.1109/TDEI.2017.006762