Exploration of dielectric spectra of variously synthesized epoxy/ZnO nanocomposites

Mihir N. Velani; Ritesh R. Patel

doi:10.1515/polyeng-2023-0079

Article

Exploration of dielectric spectra of variously synthesized epoxy/ZnO nanocomposites

Mihir N. Velani and Ritesh R. Patel

Published/Copyright: July 21, 2023

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From the journal Journal of Polymer Engineering Volume 43 Issue 7

Abstract

Polymeric epoxy-based nanocomposites have rapidly developed in high energy density and power industry components. The composite insulation undergoes harsh extreme temperature conditions and a high electric field with varying frequencies. This paper dissects the components of complex permittivity in epoxy/ZnO nano and micro composites that were synthesized using different methods, utilizing dielectric spectroscopy as per ASTM D150. The performance of the composites was studied by analyzing the spectra over a frequency range spanning from 1 mHz to 1 kHz. We presume interfacial polarization arises in the composites due to particle clustering. Furthermore, we evaluated the effect of varying filler concentration at 25, 50, 70, and 90 °C. The real permittivity positions the α-steps at 70 and 90 °C. The real and imaginary permittivities remain largely unpretentious by the synthesis method over the entire frequency range.

Keywords: conduction loss; interfacial polarization; permittivity; quasi-DC; relaxation

Corresponding author: Ritesh R. Patel, Department of Electrical Engineering, G.H. Patel College of Engineering and Technology, Vallabh Vidyanagar 388120, Gujarat, India, E-mail: r2patel@yahoo.com

Funding source: Government of Gujaratâ€™s Students Startup and Innovation Policy (SSIP)

Award Identifier / Grant number: SSIP/SOE/092020/003

Acknowledgments

The authors are grateful to Saurashtra University’s Department of Pharmaceutical Sciences for enabling us to work with the ultrasonic probe sonicator. We extend our thanks the High Voltage Laboratory, IITK, and Mr. Amrendra Kumar, Ph.D. scholar, Department of Electrical Engineering, IITK, for helping us to carry out the Broadband Dielectric Spectroscopy facility.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The authors are grateful to the Government of Gujarat’s Students Startup and Innovation Policy (SSIP), which granted part funding for this project (SSIP/SOE/092020/003).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2023-04-05

Accepted: 2023-06-16

Published Online: 2023-07-21

Published in Print: 2023-08-28

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Articles in the same Issue

https://doi.org/10.1515/polyeng-2023-0079

Keywords for this article

conduction loss; interfacial polarization; permittivity; quasi-DC; relaxation