Electrical and elastic properties of 1–3 PZT/epoxy piezoelectric composites

Abstract

This paper focused on the electrical and elastic properties of 1-3 PZT/epoxy composites fabricated by a dice-fill method. When PZT volume fractions are 10-35 vol.%, the piezoelectric constants d 33 of the PZT/epoxy composites are about 170-270 pC/N and permittivity ɛ r measured at 1 kHz is 80-350. The composites also possess lower acoustic impedance Z of 4-9 Mrayl, higher thickness electromechanical coupling coefficient k t of 65% and better flexibility C 33 of 13-33 GPa. Three mode resonant characteristics were analyzed based on the sizes and microstructural periodicity of composites, which had a great effect on k t . Finally, these electrical and elastic properties of the composites were compared with the prediction based on a well-known homogenization model.

Flexible 1-3 Piezoelectric Composites with Soft Embedded Conductive Interconnects for Underwater Acoustic Transducers

“…Table shows the comparison of the main properties between the PSC and the rigid 1-3 composites. Compared with the k t of the rigid 1-3 composite (Figure c), ,,,,− the PSC had a higher k t , indicating a higher energy conversion efficiency of electrical and mechanical energy. This was mainly due to the fact that silicone rubber is softer than epoxy resin, which reduces the mechanical constraint on the piezoelectric material and enables the piezoelectric column to exhibit a better 33-mode, thus improving the radiating ability of sound energy.…”

“…7,16,39,42,43 (e) d 33 values and the average value of 60 points. (f) Comparison of FOM with previously reported 1-3 composites 7,39,42,…”

Effects of pre-polarization on the dielectric and piezoelectric properties of 0–3 type PIN–PMN–PT/PVDF composites

“…When the ceramic content exceeds 80 %, the Z and C 33 decrease. This phenomenon is not as the monotonic increasing shown in 1-3 composites [28,29]. It is believed that, as the ceramic content increases, the contribution of PVDF to modify Z and C 33 reduces.…”

Effects of porosity on dielectric and piezoelectric properties of porous lead zirconate titanate ceramics

“…[1][2][3][4] Compared with other types of piezo-composites, porous PZT ceramics have advantages in the following aspects: low cost, easy fabrication, no harsh requirements on usage temperature, roughly linear relationship between the piezoelectric properties and porosity, etc. To improve the properties of monolithic PZT ceramic, piezoelectric composites such as PZT/polymer and PZT/air ͑porous PZT͒ have been developed.…”