Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 356, Issue 11-17, Pages 564-567Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2009.09.034
Keywords
Conductivity; Dielectric properties, relaxation, electric; modulus; Fast ion conduction; Ferroelectric
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A method of broad-band dielectric relaxation spectroscopy (10(-1)-10(7) Hz) has been used to study the mechanisms of high-temperature relaxation, related to space charge and electrode phenomena, in extruded films of vinylidene fluoride - hexafluoropropylene copolymer. The analysis of dielectric data on films of different thickness showed qualitative agreement with Iwamoto theory. Quantitative correlation of temperature dependencies of the relaxation times with conclusions of this theory assumes that not only the film thickness, but also the diffusion coefficient must be taken into account. It was found that mobility characteristics of the space charge are dependent upon the electrode material. (c) 2010 Elsevier B.V. All rights reserved.
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