Piezoelectric Properties of the Composites of Polymers and Ceramics

Abstract

The composites of polymers and piezoelectric ceramics have recently been attracting much attention because the composites have flexibility as well as piezoelectric activity.
The phase connectivity is particularly important in piezoelectric property of the composites. A model of the two-phase system with spherical dispersions was applied to the composites of fluoro polymers and lead zirconate-titanate(PZT) ceramics. For the PZT/vinylidene fluoride and trifluoroethylene copolymer(VDF/TrFE) system, a strange behavior of the piezoelectric d-constant to the volume fraction of PZT ceramics was observed, which is explained by a modified model of the system with spherical dispersions.