Depolarization current relaxation process of insulating dielectrics after corona poling under different charging conditions | Zendy

Jiyuan Zhang | Zendy; Tianle Zhou | Zendy; J. X. Wang | Zendy; Xiuyou Yang | Zendy; Fei Zhu | Zendy; Lingmin Tian | Zendy; R. T. Liu | Zendy

Open Access

Depolarization current relaxation process of insulating dielectrics after corona poling under different charging conditions

Author(s) -

Jiyuan Zhang,

Tianle Zhou,

J. X. Wang,

Xiuyou Yang,

Fei Zhu,

Lingmin Tian,

R. T. Liu

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4993699

Subject(s) - poling , materials science , space charge , dielectric , corona discharge , relaxation (psychology) , composite material , partial discharge , polyimide , voltage , corona (planetary geology) , electron , optoelectronics , electrical engineering , psychology , social psychology , physics , layer (electronics) , quantum mechanics , ferroelectricity , engineering , astrobiology , venus

As an insulating dielectric, polyimide is favorable for the application of optoelectronics, electrical insulation system in electric power industry, insulating, and packaging materials in space aircraft, due to its excellent thermal, mechanical and electrical insulating stability. The charge storage profile of such insulating dielectric is utmost important to its application, when it is exposed to electron irradiation, high voltage corona discharge or other treatments. These treatments could induce changes in physical and chemical properties of treated samples. To investigate the charge storage mechanism of the insulating dielectrics after high-voltage corona discharge, the relaxation processes responsible for corona charged polyimide films under different poling conditions were analyzed by the Thermally Stimulated Discharge Currents method (TSDC). In the results of thermal relaxation process, the appearance of various peaks in TSDC spectra provided a deep insight into the molecular status in the dielectric material and reflected stored space charge relaxation process in the insulating polymers after corona discharge treatments. Furthermore, the different space charge distribution status under various poling temperature and different discharge voltage level were also investigated, which could partly reflect the influence of the ambiance condition on the functional dielectrics after corona poling

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