An insight Into the role of Nano-Alumina on DC Flashover-Resistance and surface charge variation of Epoxy Nanocomposites
- The addition of nano-Al2O3 has been shown to enhance the breakdown voltage of epoxy resin, but its flashover results appeared with disputation. This work concentrates on the surface charge variation and dc flashover performance of epoxy resin with nano-Al2O3 doping. The dispersion of nano-Al2O3 in epoxy is characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The dc flashover voltages of samples under either positive or negative polarity are measured with a finger-electrode system, and the surface charge variations before and after flashovers were identified from the surface potential mapping. The results evidence that nano-Al2O3 would lead to a 16.9% voltage drop for the negative flashovers and a 6.8% drop for positive cases. It is found that one-time flashover clears most of the accumulated surface charges, regardless of positive or negative. As a result, the ground electrode is neighbored by an equipotential zone enclosed with low-density heterocharges. The equipotential zone tends to be broadenedThe addition of nano-Al2O3 has been shown to enhance the breakdown voltage of epoxy resin, but its flashover results appeared with disputation. This work concentrates on the surface charge variation and dc flashover performance of epoxy resin with nano-Al2O3 doping. The dispersion of nano-Al2O3 in epoxy is characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The dc flashover voltages of samples under either positive or negative polarity are measured with a finger-electrode system, and the surface charge variations before and after flashovers were identified from the surface potential mapping. The results evidence that nano-Al2O3 would lead to a 16.9% voltage drop for the negative flashovers and a 6.8% drop for positive cases. It is found that one-time flashover clears most of the accumulated surface charges, regardless of positive or negative. As a result, the ground electrode is neighbored by an equipotential zone enclosed with low-density heterocharges. The equipotential zone tends to be broadened after 20 flashovers. The nano-Al2O3 is noticed as beneficial to downsize the equipotential zone due to its capability on charge migration, which is reasonable to maintain flashover voltage at a high level after multiple flashovers. Hence, nano-Al2O3 plays a significant role in improving epoxy with high resistance to multiple flashovers.…
Author details: | Yushuang He, Feipeng WangORCiD, Li HeORCiD, Qiang Wang, Jian Li, Yihua Qian, Reimund GerhardORCiDGND, Ronald PlathORCiDGND |
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DOI: | https://doi.org/10.1109/TDEI.2022.3173510 |
ISSN: | 1070-9878 |
ISSN: | 1558-4135 |
Title of parent work (English): | IEEE transactions on dielectrics and electrical insulation |
Publisher: | Inst. of Electr. and Electronics Engineers |
Place of publishing: | Piscataway |
Publication type: | Article |
Language: | English |
Date of first publication: | 2022/06/01 |
Publication year: | 2022 |
Release date: | 2024/04/11 |
Tag: | Doping; Electric potential; Epoxy resin; Epoxy resins; Surface treatment; flashover; multiple; nanocomposite; surface charge; surface morphology |
Volume: | 29 |
Issue: | 3 |
Number of pages: | 8 |
First page: | 1022 |
Last Page: | 1029 |
Funding institution: | Natural Science Foundation of China [92166206]; Ministry of Education of; China through the 111 Project [BP0820005] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer review: | Referiert |