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Investigations on the Electrical Performances of CuNPs/BN/EPDM Composites

Journal of Electronic Materials, ISSN: 1543-186X, Vol: 51, Issue: 3, Page: 1349-1357
2022
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Article Description

Rubber-based insulation materials have been widely used in the field of electrical engineering. To develop rubber with excellent nonlinear electrical conductivity can relieve the electric field concentration in the stress cone of a cable accessory. In this study, ethylene propylene diene monomer (EPDM) was selected as the rubber matrix, and copper nanoparticles (CuNPs) were grown on hexagonal boron nitride (BN) using a liquid-phase chemical reduction method. The prepared CuNPs/BN fillers were introduced into the EPDM matrix to obtain CuNPs/BN/EPDM composites. The microstructures of fillers and composites were systematically characterized. Specifically, the electrical conductivity and breakdown field strength at different temperatures were measured and analyzed. The results show that filling CuNPs/BN enables the EPDM to have outstanding nonlinear electrical conductivity and weakens the temperature dependence of the electric breakdown strength. The simulation analyses also prove that CuNPs/BN/EPDM composites with nonlinear conductivity can avoid the electric field concentration in the stress cone, which is beneficial to ensure the safety and reliability operation of a cable accessory. Graphical Abstract: [Figure not available: see fulltext.].

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