Polyimide/nanosized CaCu3Ti4O12 functional hybrid films with high dielectric permittivity

Autor:	Di Yin, Yang Yang, Qing-Guo Chi, Zhihong Lu, Benpeng Zhu, Ziyu Wang, Jing Shi, Chunlong Fei, Qingquan Lei, Rui Xiong
Rok vydání:	2013
Předmět:	Permittivity Condensed Matter::Materials Science Materials science Physics and Astronomy (miscellaneous) Percolation theory Percolation Physics::Optics Relative permittivity Percolation threshold Dielectric loss Dielectric Composite material Dielectric spectroscopy
Zdroj:	Applied Physics Letters. 102:042904
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.4789504
Popis:	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 (e = 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::08af5ef053494bccb038aa9c698019a9 https://doi.org/10.1063/1.4789504 Zobrazit plný text záznamu