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Title: Pyroelectric and piezoelectric properties of lead titanate/polyvinylidene fluoride-trifluoroethylene 0-3 composites
Authors: Chan, HLW 
Chan, WK
Zhang, Y
Choy, CL
Issue Date: Aug-1998
Source: IEEE transactions on dielectrics and electrical insulation, Aug. 1998, v. 5, no. 4, p. 505-512
Abstract: Composites of calcium modified lead titanate powder dispersed in a polyvinylidene fluoridel/trifluoroethylene copolymer matrix have been prepared using solvent casting followed by compression molding. Two groups of poled samples have been prepared: one with only the ceramic phase polarized and the other with both phases polarized. The observed 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, the piezoelectric activities of the two phases partially cancel each other while the pyroelectric activities reinforce. Hence, at a certain ceramic volume fraction, the composite is pyroelectric but not piezoelectric.
Keywords: Ferroelectric ceramics
Piezoelectric coefficients
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE transactions on dielectrics and electrical insulation 
ISSN: 1070-9878
EISSN: 1558-4135
DOI: 10.1109/94.708265
Rights: © 1998 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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