The Effect of High Concentrations of MgO on Space Charge Accumulation and Electric Field Distribution in Epoxy Resin

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI:10.1109/Diagnostika55131.2022.9905134

Jiří Kopřiva, J. Hornak, P. Trnka, O. Michal, Š. Hardoň

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Abstract

Dielectric materials are an essential part of any electrical device. These materials are under constant development to optimize and improve their insulating properties and adjust them for specific applications. The recent trend of nanocomposites opens new possibilities for these materials via new kinds of modifications not possible in the past. Furthermore, with the increasing trend of HVDC applications, it is of rising importance to further study the effects of DC voltage stress on dielectric materials, as the phenomenon of space charge accumulation has a considerable impact on the longevity of the dielectric system. In this article, a cold-cure epoxy resin was used as a base material and MgO nanoparticles were incorporated in various weight percentages (0, 10, 20, and 30 wt.% of MgO) to create samples. The electric field distribution and space charge accumulation under a high voltage DC stress were measured via the pulse electro-acoustic (PEA) method.

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高浓度氧化镁对环氧树脂中空间电荷积累和电场分布的影响

介电材料是任何电气设备的重要组成部分。这些材料正在不断发展，以优化和改善其绝缘性能，并根据具体应用进行调整。纳米复合材料的最新发展趋势为这些材料开辟了新的可能性，通过各种新的改性在过去是不可能的。此外，随着高压直流应用的不断增加，进一步研究直流电压应力对介电材料的影响也变得越来越重要，因为空间电荷积累现象对介电系统的寿命有相当大的影响。在本文中，使用冷固化环氧树脂作为基础材料，并加入不同重量百分比的MgO纳米颗粒(0、10、20和30 wt.%的MgO)来创建样品。采用脉冲电声(PEA)法测量了高压直流应力下的电场分布和空间电荷积累。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)

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