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Title: Piezoelectric and pyroelectric properties of PZT/P (VDF-TrFE) composites with constituent phases poled in parallel or anti-parallel directions
Authors: Ng, KL
Chan, HLW 
Choy, CL 
Issue Date: Nov-2000
Source: IEEE transactions on ultrasonics, ferroelectrics, and frequency control, Nov. 2000, v. 47, no. 6, p. 1308-1315
Abstract: Composites of lead zirconate titanate (PZT) powder dispersed in a vinylidene fluoride-trifluoroethylene copolymer [P(VDF-TrFE)] matrix have been prepared by compression molding. Three groups of polarized samples have been prepared by poling: only the ceramic phase, the ceramic and polymer phases in parallel directions, and the two phases in antiparallel directions. The measured permittivities of the unpoled composites are consistent with the predictions of the Bruggeman model. The changes in the pyroelectric and piezoelectric coefficients of the poled composites with increasing ceramic volume fraction can be described by modified linear mixture rules. When the ceramic and copolymer phases are poled in the same direction, their pyroelectric activities reinforce while their piezoelectric activities partially cancel. However, when the ceramic and copolymer phases are poled in opposite directions, their piezoelectric activities reinforce while their pyroelectric activities partially cancel.
Keywords: Lead zirconate titanate
Vinylidene fluoride-trifluoroethylene copolymer
Pyroelectric activities
Piezoelectric ceramics
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE transactions on ultrasonics, ferroelectrics, and frequency control 
ISSN: 0885-3010
EISSN: 1525-8955
DOI: 10.1109/58.883519
Rights: © 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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