Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites
Micro/nano- BN co-doped epoxy composites were prepared and their thermal conductivity, breakdown strength at power frequency and voltage endurance time under high frequency bipolar square wave voltage were investigated. The thermal conductivity and breakdown performance were enhanced simultaneously...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/13/3521 |
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| author | Chuang Zhang Jiao Xiang Shihang Wang Zhimin Yan Zhuolin Cheng Hang Fu Jianying Li |
| author_facet | Chuang Zhang Jiao Xiang Shihang Wang Zhimin Yan Zhuolin Cheng Hang Fu Jianying Li |
| author_sort | Chuang Zhang |
| collection | DOAJ |
| description | Micro/nano- BN co-doped epoxy composites were prepared and their thermal conductivity, breakdown strength at power frequency and voltage endurance time under high frequency bipolar square wave voltage were investigated. The thermal conductivity and breakdown performance were enhanced simultaneously in the composite with a loading concentration of 20 wt% BN at a micro/nano proportion of 95/5. The breakdown strength of 132 kV/mm at power frequency, the thermal conductivity of 0.81 W·m<sup>−1</sup>·K<sup>−1</sup> and voltage endurance time of 166 s were obtained in the composites, which were approximately 28%, 286% and 349% higher than that of pristine epoxy resin. It is proposed that thermal conductive pathways are mainly constructed by micro-BN, leading to improved thermal conductivity and voltage endurance time. A model was introduced to illustrate the enhancement of the breakdown strength. The epoxy composites with high thermal conductivity and excellent breakdown performance could be feasible for insulating materials in high-frequency devices. |
| first_indexed | 2024-03-10T10:05:10Z |
| format | Article |
| id | doaj.art-038f42bd718c4ca9b3c4b85264f4bc06 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:05:10Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-038f42bd718c4ca9b3c4b85264f4bc062023-11-22T01:33:42ZengMDPI AGMaterials1996-19442021-06-011413352110.3390/ma14133521Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy CompositesChuang Zhang0Jiao Xiang1Shihang Wang2Zhimin Yan3Zhuolin Cheng4Hang Fu5Jianying Li6State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaPower China Hubei Electric Engineering Co., Ltd., Wuhan 430000, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaMicro/nano- BN co-doped epoxy composites were prepared and their thermal conductivity, breakdown strength at power frequency and voltage endurance time under high frequency bipolar square wave voltage were investigated. The thermal conductivity and breakdown performance were enhanced simultaneously in the composite with a loading concentration of 20 wt% BN at a micro/nano proportion of 95/5. The breakdown strength of 132 kV/mm at power frequency, the thermal conductivity of 0.81 W·m<sup>−1</sup>·K<sup>−1</sup> and voltage endurance time of 166 s were obtained in the composites, which were approximately 28%, 286% and 349% higher than that of pristine epoxy resin. It is proposed that thermal conductive pathways are mainly constructed by micro-BN, leading to improved thermal conductivity and voltage endurance time. A model was introduced to illustrate the enhancement of the breakdown strength. The epoxy composites with high thermal conductivity and excellent breakdown performance could be feasible for insulating materials in high-frequency devices.https://www.mdpi.com/1996-1944/14/13/3521bipolar square wave voltageboron nitridemicro/nano co-dopingepoxy resinthermal conductivitybreakdown |
| spellingShingle | Chuang Zhang Jiao Xiang Shihang Wang Zhimin Yan Zhuolin Cheng Hang Fu Jianying Li Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites Materials bipolar square wave voltage boron nitride micro/nano co-doping epoxy resin thermal conductivity breakdown |
| title | Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites |
| title_full | Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites |
| title_fullStr | Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites |
| title_full_unstemmed | Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites |
| title_short | Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites |
| title_sort | simultaneously enhanced thermal conductivity and breakdown performance of micro nano bn co doped epoxy composites |
| topic | bipolar square wave voltage boron nitride micro/nano co-doping epoxy resin thermal conductivity breakdown |
| url | https://www.mdpi.com/1996-1944/14/13/3521 |
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