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Study on properties of micro-Al2O3-SiO2/epoxy composites for UHV GIL insulators
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Peng LIU1, Hang YUAN1, Sijia ZHU1, Huijun ZHAO1, Shuang YAN1, Zehua WU1, Zongren PENG1, Haoran WANG2
Insulating Materials | 2024, 57(2) : 29 - 37
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Insulating Materials | 2024, 57(2): 29-37
• Material Research •
Study on properties of micro-Al2O3-SiO2/epoxy composites for UHV GIL insulators
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Peng LIU1, Hang YUAN1, Sijia ZHU1, Huijun ZHAO1, Shuang YAN1, Zehua WU1, Zongren PENG1, Haoran WANG2
Affiliations
  • 1Xi′an Jiaotong University, Xi′an 710049, China
  • 2China Electric Power Research Institute, Beijing 100192, China
Published: 2024-02-20 doi: 10.16790/j.cnki.1009-9239.im.2024.02.004
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With a high voltage grade and large transmission capacity, ultra-high voltage (UHV) gas insulated metal enclosed transmission line (GIL) needs insulator with higher resistance to the comprehensive effect from electric, heat, and force. In this paper, epoxy composite materials were prepared by doping micro-Al2O3, micro-SiO2, and micro-Al2O3-SiO2 blend fillers, respectively. The mechanical, thermal, and electrical properties of the blend system were tested and analyzed. The results show that with the increase of the volume proportion of Al2O3, the comprehensive mechanical properties of the composites are improved, and pure micro-Al2O3/epoxy composite exhibits the best mechanical properties. Doping two fillers improves the thermal conductivity and arc resistance of the composites, but slightly reduces the glass transition temperature and increases the thermal expansion coefficient. When the volume ratio of Al2O3 and SiO2 in composites is 1:1, the arc resistance duration and the thermal conductivity of the composite reaches 1.198 W/(m·K） and 186.63 s, respectively. With the increase of the volume proportion of SiO2, the dielectric constant of the composites decreases, while the breakdown strength increases. The power frequency breakdown strength of the pure micro-SiO2/epoxy composites is the highest, reaching 36.63 kV/mm.

gas insulated metal enclosed transmission line (GIL)  /  Al2O3  /  SiO2  /  epoxy resin  /  mechanical properties  /  thermal properties  /  dielectric properties
Peng LIU, Hang YUAN, Sijia ZHU, Huijun ZHAO, Shuang YAN, Zehua WU, Zongren PENG, Haoran WANG. Study on properties of micro-Al2O3-SiO2/epoxy composites for UHV GIL insulators[J]. Insulating Materials, 2024 , 57 (2) : 29 -37 . DOI: 10.16790/j.cnki.1009-9239.im.2024.02.004
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Year 2024 volume 57 Issue 2
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.02.004
  • Receive Date：2023-01-17
  • Online Date：2025-12-22
  • Published：2024-02-20
Article Data
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History
  • Received：2023-01-17
  • Revised：2023-03-06
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    1Xi′an Jiaotong University, Xi′an 710049, China
    2China Electric Power Research Institute, Beijing 100192, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2024.02.004
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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