Polyimide/nanosized CaCu3Ti4O12 functional hybrid films with high dielectric permittivity

This work reports the high dielectric permittivity of polyimide (PI) embedded with CaCu3Ti4O12 (CCTO) nanoparticles. The dielectric behavior has been investigated over a frequency of 100 Hz-1 MHz. High dielectric permittivity (ε = 171) and low dielectric loss (tan δ = 0.45) at 100 Hz have been obser...

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Bibliographic Details
Published in:Applied physics letters 2013-01, Vol.102 (4)
Main Authors: Yang, Yang, Zhu, Ben-Peng, Lu, Zhi-Hong, Wang, Zi-Yu, Fei, Chun-Long, Yin, Di, Xiong, Rui, Shi, Jing, Chi, Qing-Guo, Lei, Qing-Quan
Format: Article
Language:English
Subjects:
CERAMICS
COMPOSITES
COPPER OXIDE
DIELECTRIC CONSTANT
Dielectrics
INSULATION (ELECTRICAL)
MICROSTRUCTURES
Nanocomposites
Nanoparticles
Nanostructure
PARTICLES
Percolation
PERMITTIVITY
Polyimide resins
POLYIMIDES
RESINS
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Summary:This work reports the high dielectric permittivity of polyimide (PI) embedded with CaCu3Ti4O12 (CCTO) nanoparticles. The dielectric behavior has been investigated over a frequency of 100 Hz-1 MHz. High dielectric permittivity (ε = 171) and low dielectric loss (tan δ = 0.45) at 100 Hz have been observed near the percolation threshold. The experimental results fit well with the Percolation theory. We suggest that the high dielectric permittivity originates from the large interface area and the remarkable Maxwell-Wagner-Sillars effect at percolation in which nomadic charge carriers are blocked at internal interfaces between CCTO nanoparticles and the polyimide matrix.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4789504