Open AccessUnderstanding the impact of space charge variations with UV‐ and water‐aged epoxy alumina nanocomposites adopting pulsed electroacoustic techniques
Author(s) -
Sarathi Ramanujam,
Suematsu Hisayuki
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0209
Subject(s) - epoxy , space charge , materials science , nanocomposite , dielectric , composite material , optoelectronics , electron , physics , quantum mechanics
Epoxy alumina nanocomposites were prepared to understand the space charge variations with ultra violet (UV)‐ and water‐aged specimens. Addition of alumina nanofiller to epoxy resin had suppressed the space charge formation. A pulsed electroacoustic technique was employed to measure the space charge accumulation in epoxy–alumina nanocomposites. A marginal increase in space charge with enhanced electric field in the bulk volume of insulation was observed with UV‐ and water‐aged nanocomposites. It was observed that 3 wt% sample showed better performance in all ageing conditions, which was confirmed through space charge studies and by the measurement of the dielectric parameters especially dielectric constant and tan( δ ).