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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/564

Title: Pyroelectric and piezoelectric properties of lead titanate/polyvinylidene fluoride-trifluoroethylene 0-3 composites
Authors: Chan, Helen L. W.
Chan, W. K.
Zhang, Y.
Choy, Chung-loong
Subjects: Ferroelectric ceramics
Permittivities
Pyroelectricity
Piezoelectric coefficients
Issue Date: Aug-1998
Publisher: IEEE
Citation: 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.
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.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/564
ISSN: 10709878
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

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