NDLI: Influence of interface on the electrical properties of polyimide/TiO<sub>2</sub> composite films

Content Provider	IEEE Xplore Digital Library
Author	Yu Feng Jinghua Yin Minghua Chen Xiaoxu Liu Bo Su Weidong Fei Qingquan Lei
Copyright Year	1994
Abstract	Polyimide/TiO₂ (PI/TiO₂) composite films were fabricated by in-situ polymerization and are reported in this paper. The effect of interface (PI-TiO₂) on dielectric and breakdown properties was investigated via conductivity, photo-stimulated discharge (PSD), permittivity, thermo-gravimetric analysis (TGA) and breakdown characteristic. The results show that interface between PI and TiO₂ in composites contains deep charge traps with density proportional to TiO₂ doping concentration. Interface enhances space-charge polarization to increase conductivity and loss tangent at low frequency. The pinning influence of interface on PI molecular chain motion is reflected in the downtrend of permittivity (0%-4% nano-TiO₂ doping concentration) and increasing decomposition temperature (T_PI<;T_3%<;T_7%). When exposed to corona ageing, the PI matrix rather than interface or nano-TiO₂ is initially damaged, and the remaining mixture of interface and nano-TiO₂ are accumulated gradually on the PI/TiO₂ surface forming a “protective” layer which slowing down further PI/TiO₂ erosion in corona ageing.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	1501
Ending Page	1508
Page Count	8
File Size	2423332
File Format	PDF
ISSN	10709878
Volume Number	21
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Doping Permittivity Aging Dielectrics Corona breakdown Interface TiO ₂ polyimide films dielectric
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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