Effect of stoichiometry on AC and DC breakdown of silicon nitride/epoxy nanocomposites

Alhabill, Fuad N., Vaughan, Alun S., Anani, Nader and Andritsch, Thomas (2021) Effect of stoichiometry on AC and DC breakdown of silicon nitride/epoxy nanocomposites. IEEE Trans. Dielectr. Electr. Insul.. (In Press)

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Abstract

This study investigates the electrical behavior of silicon nitride/epoxy nanocomposites. It is demonstrated that the presence of the nanofiller affects the resin/hardener stoichiometry, which results in the development of different network structures throughout the matrix polymer. However, detailed analysis shows that this stoichiometric effect cannot account, alone, for the observed changes in the electrical behavior of the nanocomposite samples. A comparison between the electrical behavior of filled and the unfilled samples, where appropriate stoichiometric compensation has been applied, indicates that there is an additional effect that is exclusively a function of the nanofiller loading and which is superimposed on any matrix chemistry effects. Potential explanations for this nanoparticle effect are discussed, including: nanoparticle agglomeration; water shells around the nanoparticles; the influence of nanoparticles on matrix dynamics, structure or the free volume content of polymer interphase.

Item Type: Article
Additional Information: Department of Engineering and Design
Subjects: Q Science > Q Science (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User: Fuad Alhabill
Date Deposited: 17 Jun 2021 10:46
Last Modified: 17 Jun 2021 10:46
URI: http://eprints.chi.ac.uk/id/eprint/5819

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