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IJPAP Vol.42(09) [September 2004] >


Title: Depolarization studies of polyvinylidene fluoride foil electrets using thermally stimulated discharge
Authors: Khare, P K
Sahu, Devendra K
Verma, Ashutosh
Srivastava, Rudra Kant
Keywords: Electrets
Thermally stimulated discharge
Polyvinylidene fluoride
Issue Date: Sep-2004
Publisher: CSIR
IPC CodeH 01 G 7/02
Abstract:  Thermally stimulated discharge current (TSDC) in foils of polyvinylidene fluoride (PVDF) was measured under various polarizing conditions. The TSDC thermograms were recorded by reheating the samples at a linear rate of 3 oC/min. It was found that samples give rise to a peak around (100 ± 10 oC). The peak position is not consistent with the polarization fields and temperatures. The activation energy associated with the peak is found to be ~ 0.62 eV. The dependence of TSD current and TSDC data on polarizing agents, i.e. field and temperature is explained on the basis of theoretical predictions. The space charge polarization contributes significantly to the polarization of the polymer.
Page(s): 693-696
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.42(09) [September 2004]

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