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Microstructure and electrical properties in three-component (Al2O3–TiO2)/polyimide nanocomposite films

Published online by Cambridge University Press:  31 January 2011

Jun-Wei Zha ,
Ben-Hui Fan ,
Zhi-Min Dang ,
Sheng-Tao Li  and
George Chen
Jun-Wei Zha
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Ministry of Education, Key Laboratory for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China; Shanghai Key Laboratory of Electric Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; and School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, United Kingdom
Ben-Hui Fan
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Ministry of Education, Key Laboratory for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
Zhi-Min Dang*
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Ministry of Education, Key Laboratory for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
Sheng-Tao Li
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
George Chen
Affiliation:
School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, United Kingdom
*
a)Address all correspondence to this author. e-mail: dangzm@mail.buct.edu.cn
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Abstract

Polyimide (PI)-matrix composite films containing inorganic nanoparticles (nano-Al2O3 and nano-TiO2) have been fabricated. A proposed model is used to explain different structures of the (Al2O3–TiO2)/PI (ATP) films synthesized by employing in situ polymerization. Dependences of dielectric permittivities of the ATP films on frequency and temperature were studied. Results show the breakdown strength of the films decreases with prolonging the corona aging time. The incorporation of the nano-Al2O3 and nano-TiO2 particles significantly improves the corona resistance of the films. The corona aging also influences the infrared absorbance, the glass transition temperature (Tg), and loss factor (tanδ) of the ATP films.

Keywords

PolymerCompositeDielectric Properties

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Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 12 , December 2010 , pp. 2384 - 2391
Copyright
Copyright © Materials Research Society 2010

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