Open AccessInvestigation on space charge and charge trap characteristics of Al–epoxy nanocomposites
Author(s) -
Chillu Naresh,
Jayaganthan Rengaswamy,
Nageshwar Rao Burjupati,
Danikas Michael,
Tanaka Toshikatsu,
Sarathi Ramanujam
Publication year - 2020
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2019.0294
Subject(s) - space charge , trap (plumbing) , epoxy , nanocomposite , charge (physics) , materials science , space (punctuation) , atomic physics , physics , composite material , computer science , nuclear physics , quantum mechanics , electron , meteorology , operating system
Optimised quantity of nano‐aluminium (Al) filler mixed with epoxy resin using percolation threshold criteria was adapted to fabricate nanocomposite with desired space‐charge and charge‐trap properties. Surface potential variation due to charge deposition on to the insulating material under transient voltages was investigated, and it showed the improved decay rate with reduced trap depth for the nanocomposites with nanofillers addition in the range between 0.5 and 5 wt%. Threshold electric field calculated based on space‐charge density variation by pulsed electroacoustic measurement was found to be between 7–9 kV/mm and maximum electric field calculated through polarity reversal test is about 9 kV/mm, for 5 wt% (for the optimised value of nanofiller) epoxy nano‐Al composites.