石墨烯涂层对环氧树脂中空间电荷注入的阻碍作用

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI:10.1109/ICPADM49635.2021.9493969

P. Seri, S. V. Suraci, D. Fabiani

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引用次数: 0

摘要

高压直流应用中使用的环氧树脂(以及一般的电介质)的可靠性受到绝缘材料中空间电荷积累的显著影响。已经测试了几种方法来限制空间电荷的注入和积累。在这项工作中，对具有石墨烯涂层的平面样品进行了测试。在不同温度(从30°C到60°C)和电场(从30 kV/mm到50 kV/mm)下，对有涂层和没有涂层的环氧树脂样品进行了空间电荷积累、电导率和介电常数的测量。结果表明，在低场和低温度下，参考样品中的空间电荷会积累，而石墨烯涂层则会减少空间电荷。另一方面，在更高的场或温度下，这种效应是相反的。

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Effects of Graphene Coatings on hindering Space Charge injection in Epoxy Resin

The reliability of epoxy resins (and dielectrics in general) employed for HVDC applications is significantly affected by space charge accumulation in the insulating material. Several methods have been tested to limit the injection and accumulation of space charge. In this work, planar specimens featuring graphene coatings were tested. Measurements of space charge accumulation, conductivity and permittivity at different temperatures (from 30°C to 60°C) and fields (from 30 kV/mm to 50 kV/mm) were carried out on epoxy specimens with and without coatings. Results show accumulation of space charge for low fields and temperatures in the reference specimens, while a reduction can be noticed with a layer of graphene coating. On the other hand, at higher fields or temperatures, the effect is reversed.

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2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)

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