Surface Tracking of MgO/Epoxy Nanocomposites: Effect of Surface Hydrophobicity
Source abstract
Abstract
Surface tracking has been one of the challenges for outdoor organic insulations, in electronic and electrical devices. In this paper, surface tracking behavior of nano-MgO/epoxy composite samples were measured according to the standard IEC 60112. Improved tracking resistance was obtained in nanocomposites with an 18.75% uplift in the comparative tracking index, and a decrease of 58.20% in the surface ablation area at a fixed 425 V. It was observed that the tracking resistance and surface hydrophobicity shared the same tendency—both, the comparative tracking index and surface contact angle increased with an increase of the nanofiller content. Samples with better hydrophobicity exhibited a higher tracking resistance. It could be the case that the conductive pathway of contamination was harder to form, as a result there were fewer discharging processes. With the development of surface tracking, the surface contact angle abruptly decreased, at first, and tended to be constant, which was also accomplished with the failure of samples. In addition, reduced surface resistivity was also found in the nanocomposites, which was beneficial for releasing surface charges and inhibiting distortions in the electric fields.
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Research context
OpenAlex topics: High voltage insulation and dielectric phenomena · Dielectric materials and actuators · Power Transformer Diagnostics and Insulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Co. Ltd., Beijing 102211, China
State key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
State Grid Corporation of China, Beijing 100031, China
Northwest Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Xi’an 710075, China
State Key Laboratory of electrical insulation and Power Equipment, Xi’an 710049, China
Funding
State Key Laboratory of Advanced Power Transmission Technology · National Key Research and Development Program of China · Power Electronics Science and Education Development Program of Delta Group
References (31)
Show source-provided references
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