Abstract
Flexible, free-standing piezo and pyroelectric composite with 0 to 3 connectivity was made up from Lead Zirconate Titanate (PZT) powder and poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) copolymer. The pyroelectric and the piezoelectric longitudinal (d33) coefficients were measured. A 50/50 vol.% PZT/PVDF-HFP composite resulted in piezo and pyroelectric coefficients of d33 = 25.0 pC/N and p = 4.5 × 10-4 C/m²K at 70 °C, respectively. Analysis of the complex permittivity in a wide range of frequency was carried out indicating lower permittivity of the composite in comparison with a permittivity of the PZT ceramic. The low value of the permittivity gives a high pyroelectric figure of merit indicating that this material can be used to build a temperature sensor in spite of the lower pyroelectric coefficient compared with PZT.
Highlights
The discovery of ferroelectric effect and its application brings progress in materials science with a growth in search of new materials, which have best properties for specific application
The present paper reports some results obtained in electromechanical characterization of a ceramic/copolymer composite prepared mixing lead zirconate titanate and poly(vinylidene fluoride-hexafluoropropylene) PZT/poly(vinylidene fluoride) (PVDF)-HFP
For the PZT/PVDF-HFP composite there is an evidence of a peak around 3 × 10-4 Hz, masked by the ionic contribution
Summary
The discovery of ferroelectric effect and its application brings progress in materials science with a growth in search of new materials, which have best properties for specific application. That is the reason why researchers are still searching for a new single-phase material, or heterogeneous systems satisfying the required conditions. In opposition to heavy and rigid ceramics they found ferroelectric polymers, specially the poly(vinylidene fluoride) (PVDF)[1]. Ferroelectric polymers show many advantages over ceramics for several applications. A great impact in the electronic industry was observed with the progress on ferroelectric polymer research. The continuous progress and ceaseless search for new materials lead to the study of heterogeneous materials. The present paper reports some results obtained in electromechanical characterization of a ceramic/copolymer composite prepared mixing lead zirconate titanate and poly(vinylidene fluoride-hexafluoropropylene) PZT/PVDF-HFP
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
