Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles
Abstract Silicon carbide (SiC) is widely used to improve the non‐linear conductivity of non‐linear resistive field grading composite. In this paper, the SiC nanoparticles are modified into core‐shell nanoparticles with silica (SiO2) coating on the surface and are characterised by transmission electr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-06-01
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| Series: | High Voltage |
| Online Access: | https://doi.org/10.1049/hve2.12247 |
| _version_ | 1797797234101714944 |
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| author | Yongsen Han Zi Wang Jian Sun Zhonghua Li |
| author_facet | Yongsen Han Zi Wang Jian Sun Zhonghua Li |
| author_sort | Yongsen Han |
| collection | DOAJ |
| description | Abstract Silicon carbide (SiC) is widely used to improve the non‐linear conductivity of non‐linear resistive field grading composite. In this paper, the SiC nanoparticles are modified into core‐shell nanoparticles with silica (SiO2) coating on the surface and are characterised by transmission electron microscopy and X‐ray diffraction, respectively. The 7 wt% SiC@SiO2/epoxy nanocomposite is then prepared, and the pure epoxy and 7 wt% SiC/epoxy nanocomposite are prepared as a contrast. The relative permittivity, thermally stimulated current, conductivity and breakdown strength are studied, respectively. The presence of SiO2 shell around SiC nanoparticles has a great effect on the relative permittivity and trap distribution. The epoxy nanocomposites show non‐linear conductivity characteristics, compared with pure epoxy. The 7 wt% SiC@SiO2/epoxy nanocomposite has higher switching electric field and breakdown strength than the 7 wt% SiC/epoxy nanocomposite, which is helpful for the application of non‐linear resistive field grading composite in higher‐voltage equipment or components. |
| first_indexed | 2024-03-13T03:46:07Z |
| format | Article |
| id | doaj.art-ee230871abda49c69ecb1174aae98a1b |
| institution | Directory Open Access Journal |
| issn | 2397-7264 |
| language | English |
| last_indexed | 2024-03-13T03:46:07Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | High Voltage |
| spelling | doaj.art-ee230871abda49c69ecb1174aae98a1b2023-06-23T02:38:47ZengWileyHigh Voltage2397-72642023-06-018358358910.1049/hve2.12247Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticlesYongsen Han0Zi Wang1Jian Sun2Zhonghua Li3Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin Heilongjiang ChinaKey Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin Heilongjiang ChinaKey Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin Heilongjiang ChinaKey Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin Heilongjiang ChinaAbstract Silicon carbide (SiC) is widely used to improve the non‐linear conductivity of non‐linear resistive field grading composite. In this paper, the SiC nanoparticles are modified into core‐shell nanoparticles with silica (SiO2) coating on the surface and are characterised by transmission electron microscopy and X‐ray diffraction, respectively. The 7 wt% SiC@SiO2/epoxy nanocomposite is then prepared, and the pure epoxy and 7 wt% SiC/epoxy nanocomposite are prepared as a contrast. The relative permittivity, thermally stimulated current, conductivity and breakdown strength are studied, respectively. The presence of SiO2 shell around SiC nanoparticles has a great effect on the relative permittivity and trap distribution. The epoxy nanocomposites show non‐linear conductivity characteristics, compared with pure epoxy. The 7 wt% SiC@SiO2/epoxy nanocomposite has higher switching electric field and breakdown strength than the 7 wt% SiC/epoxy nanocomposite, which is helpful for the application of non‐linear resistive field grading composite in higher‐voltage equipment or components.https://doi.org/10.1049/hve2.12247 |
| spellingShingle | Yongsen Han Zi Wang Jian Sun Zhonghua Li Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles High Voltage |
| title | Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles |
| title_full | Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles |
| title_fullStr | Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles |
| title_full_unstemmed | Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles |
| title_short | Enhanced switching electric field and breakdown strength of epoxy composites with core‐shell silicon carbide nanoparticles |
| title_sort | enhanced switching electric field and breakdown strength of epoxy composites with core shell silicon carbide nanoparticles |
| url | https://doi.org/10.1049/hve2.12247 |
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