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Title: Thermally stimulated depolarization current of BaTiO₃/P[VDF(70)-TrFE(30)] 0-3 ferroelectric composites
Authors: Zhang, X
Peng, Z
Chan, HLW 
Choy, CL
Keywords: Barium titanate
Carrier concentration
Compression molding
Electric space charge
Ferroelectric materials
Phase transitions
Thick films
Volume fraction
Issue Date: 1999
Publisher: IEEE
Source: ISE 10 : 10th International Symposium on Electrets : 22-24 September 1999, European Cultural Centre of Delphi, Greece : proceedings, p. 407-410 How to cite?
Abstract: 0-3 ferroelectric composites of barium titanate (BT) and vinylidene fluoride-trifluoroethylene copolymer P[VDF(70)-TrFE(30)] with different volume fraction of BT were prepared by solution blending followed by compression-molding. The thermally stimulated depolarization current (TSDC) of the composites has been measured. Three detrapping charge and two phase transition peaks (one for copolymer and another for ceramic) are observed in TSDC spectra above room temperature. For the composite sample in which only ceramic phase is polarized, the detrapping charge peaks are disappeared, which indicates that the TSDC originates from the copolymer phase. According to the analysis of phase transition, the structural origin of TSDC peaks is proposed. The detrapping charge density increases as increasing BT content, which shows that ceramic inclusions enhance the ability of charge storage in the composites.
ISBN: 0-7803-5025-1
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