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Advances in the Understanding of the Electrical and Thermal Ageing of Nanocomposites

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (20 May 2026) | Viewed by 866

Special Issue Editor


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Guest Editor
School of Engineering, University of Lincoln, Lincoln LN6 7TS, UK
Interests: statistical analysis and data mining; chaos theory; dielectric spectroscopy; charge transport in dielectrics; partial discharge and electrical treeing phenomena; electro-thermal ageing and breakdown; dielectric nanocomposites
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Special Issue Information

Dear Colleagues,

Nanodielectrics have been proposed as the most promising novel high voltage insulation materials. Over the past 3 decades, numerous nanocomposite systems have been studied and their short-term properties thoroughly research. Nanodielectrics have been shown to have the potential to be ideal high voltage insulating materials as they can be tailored to have higher breakdown strengths, higher permittivity, and greater resistance to surface discharge compared to composite materials traditionally used as electrical insulation. Examples of proposed applications of nanodielectrics as insulating materials include cables for power transmission and energy storage either as capacitors or in Lithium battery cells. Despite the extensive characterization efforts, the long-term performance of such systems has not been investigated in such depths and their ageing behavior is not well understood.

The scope of this Special Issue is to present original research as well as review articles on the latest developments and research efforts about electrical and thermal ageing of nanodielectrics. The papers should enhance the current knowledge of the long-term performance of nanocomposite dielectrics under applied (AC or DC) electrical and thermal stresses.  The papers could cover a wide range of topics from experimental investigations to modelling and theoretical works with a particular focus on material ageing and life-time estimations.

Dr. Nikola Chalashkanov
Guest Editor

Manuscript Submission Information

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Keywords

  • nanodielectrics
  • modelling and simulation of long-term performance and reliability
  • ageing and breakdown
  • mechanical and electrical testing
  • AC and DC electrical trees
  • partial discharges

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Published Papers (1 paper)

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Research

16 pages, 3930 KB  
Article
The Effect of Electro–Thermal Ageing of Polymer–Ceramic Nanocomposite Insulation on Dielectric Endurance
by Keyvan Rasti, Sathyamoorthy Dhayalan, Nick Tucker, Len Dissado and Nikola Chalashkanov
Energies 2026, 19(7), 1629; https://doi.org/10.3390/en19071629 - 26 Mar 2026
Viewed by 538
Abstract
This study investigates the electro-thermal ageing (ETA) behaviour of neat polyamide-6 (PA6) and PA6/barium titanate (BTO) nanocomposites. Time–to–breakdown measurements were performed at 333 K, 353 K, and 373 K at field strengths between 50 and 90 kV/mm to assess the impact of nanofiller [...] Read more.
This study investigates the electro-thermal ageing (ETA) behaviour of neat polyamide-6 (PA6) and PA6/barium titanate (BTO) nanocomposites. Time–to–breakdown measurements were performed at 333 K, 353 K, and 373 K at field strengths between 50 and 90 kV/mm to assess the impact of nanofiller level on lifetime to failure. The ageing experiment showed that moderate amounts of nanofiller improved the electro-thermal endurance while excessive filler addition (20 wt.%) led to faster breakdown. The Dissado–Montanari–Mazzanti (DMM) model was used to evaluate the ageing parameters for neat PA6 and PA6/10 wt.% BTO across all three temperatures. Neat PA6 and PA6/10 wt.% BTO both showed nearly identical activation enthalpy (H/k) values, indicating that the intrinsic thermally activated ageing mechanism of PA6 is preserved in the nanocomposite. Variations in the field-sensitivity parameters (C/k and b) align with an interpretation involving changes in charge transport and interfacial trapping introduced by the addition of BTO. Furthermore, analysis of all filler concentrations confirmed that 1–10 wt.% BTO maintains or slightly improves the time to breakdown, while 20 wt.% significantly accelerated the ageing process. This research forms part of the research programme of DPI, project #852. Full article
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