Research on the Polyimide Aerogel as a Light-weight Insulating Material with High Dielectric Strength

In this article, the insulation characteristics of polyimide aerogel as an ultralight weight insulation material is investigated. The breakdown characteristics of polyimide aerogel films under different nitrogen pressure are measured, and the partial discharge characteristics during breakdown proces...

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Bibliographic Details
Published in2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) pp. 163 - 166
Main Authors Song, Bo, Ren, Ming, Hu, Yizhuo, Wang, Yue, Dong, Ming
Format Conference Proceeding
LanguageEnglish
Published IEEE 30.10.2022
Subjects
Discharges (electric)
Electric breakdown
free path
gas pressure
Insulation
Partial discharge measurement
Partial discharges
polyimide aerogel
Polyimides
porous
Voltage measurement
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Summary:In this article, the insulation characteristics of polyimide aerogel as an ultralight weight insulation material is investigated. The breakdown characteristics of polyimide aerogel films under different nitrogen pressure are measured, and the partial discharge characteristics during breakdown process are recorded. It is found that the breakdown strength of PIA shows a "U-shaped" trend with the rising gas pressure, with a maximum breakdown strength of 117kV/mm at 0.05MPa, and minimum strength of 48kV/mm at 0.5MPa. These characteristics are closely related to pore distribution inside polyimide aerogel. Micro morphology of breakdown point of polyimide aerogel suggests the gas discharge-dependent breakdown mechanism. Above test results show that polyimide aerogel has excellent insulation characteristics at low pressure, making it one of the alternative materials for light weight electrical insulation of aircraft, ship, and other equipment.
ISSN:2576-2397
DOI:10.1109/CEIDP55452.2022.9985370