Corona Resistance Mechanism of Nano-Modified Polyimide

Autor:	Hao Chen, Lin Li, Wei Zhao, Xiao-Rui Zhang, Ling Weng
Rok vydání:	2022
Předmět:	Polymers and Plastics polyimide nano-SiO2 particles electrical aging threshold corona resistance dielectric properties General Chemistry
Zdroj:	Polymers; Volume 14; Issue 24; Pages: 5469
ISSN:	2073-4360
Popis:	In this paper, the effect of field strength on the corona-resistant lifespan of a composite film and the effect of doping on the dielectric properties of the composite film were studied. The method for predicting corona-resistant lifespan under working electric field strength is discussed. Scanning electron microscopy (SEM) was used to characterize the morphology and the structure of the composite film near the breakdown point after corona formation. Fourier transform infrared spectroscopy (FT-IR) was used to characterize the imidiated film, and a conductivity current test was used to calculate the electrical aging threshold of the film. The results showed that the introduction of nano-SiO2 particles could greatly improve the corona-resistant lifespan of the material. At 155 °C, when the applied external electric field strength was extrapolated to 20 kV/mm, the corona-resistant lifespan of the PI/nano-SiO2 three-layer composite film with 10 wt% nano-particle doping was 7472.61 h.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9a4945078a939a9870075e8c95f53d1 https://pubmed.ncbi.nlm.nih.gov/36559836 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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