Characterization of PZT/PVDF Composite Film as Functional Material

Abstract

In this paper, we obtained and characterized a composite film made of lead zirconate titanate (PZT) piezoelectric ceramic and nonpolar polyvinylidene fluoride (α-PVDF) as a functional material. The scanning electron microscopy results show this composite film to have mixed connectivity due to the agglomeration of some of the PZT particles. The response of the composite to an applied ac voltage at 4110 Hz has a slope of 0.074 nm/V. The measured displacement is in the range of 0-30 nm for electric voltages ranging from 0 to 400 V. The experimental results show the composite performance as an acoustic emission sensor to be in good agreement with the response of a commercial standard microphone in the frequency range of 2-6 kHz. By applying 2 kN of cyclic force at a frequency of 3 Hz, we obtained an 80-V peak signal and calculated a dissipated power equal to 158 μW. Index Terms-Lead zirconate titanate (PZT), non-polar polyvinylidene fluoride (α-PVDF).Ricardo Luiz Barros de Freitas received the B.Sc. degree in computer engineering from the School of Engineering of Lins in 2005 and the M.Sc. and Ph.D. degrees in electrical engineering from UNESP-São Paulo State University, Ilha Solteira, Brazil, in 2008 and 2012, respectively. He joined the UNESP Optimization Group, Ilha Solteira with a CNPq PDJ grant (2015), as a Post-Doctoral Researcher. He has experience in electrical engineering, computer engineering, and biomedical engineering. He is currently an Adjunct Professor Doctor with the Department of Electrical Engineering and collaborator of the Master's Program in electrical engineering and computing with UNIOESTE-CECE-Campus Foz do Iguaçu. His research interests are knowledge optimization, intelligent materials, piezoelectricity, electronic instrumentation, structured programming, microcontrollers, sensors, hardware, software, and artificial neural networks.

1-3 Castor Oil-Based Polyurethane/PZT Piezoelectric Composite as a Possible Candidate for Structural Health Monitoring

“…Two AE simulation methods were used: (i) fall of a metallic sphere, where a metallic sphere of mass 21.4 g was released from a fixed height (5 cm), varying between 5 and 25 cm from the sensor with 5 cm increments 38 . (ii) The well-known Hsu-Nielsen method (ASTM E976-10 standard) 39,40 , in which a pencillead was broken on the carbon fiber plate at a distance of 15 cm from the sensor.…”

Dielectric, electric, and piezoelectric properties of three‐phase piezoelectric composite based on castor‐oil polyurethane, lead zirconate titanate particles and multiwall carbon nanotubes

“…In this context, polymer/ceramic composites with connectivity 0–3 have been largely studied due to their easy synthesis 18,19 . However, one of the problems encountered when evaluating the piezoelectric properties in composites with connectivity 0–3 is the low poling efficiency of the ferroelectric ceramic particles embedded in the polymer matrix 20,21 .…”

“…In this context, polymer/ceramic composites with connectivity 0-3 have been largely studied due to their easy synthesis. 18,19 However, one of the problems encountered when evaluating the piezoelectric properties in composites with connectivity 0-3 is the low poling efficiency of the ferroelectric ceramic particles embedded in the polymer matrix. 20,21 This occurs because the polymer matrix presents low dielectric constant, limiting application under high electric fields, which leads to a low internal electric field on the ceramic particulate.…”

Preparation and Property Enhancement of Poly(Vinylidene Fluoride) (PVDF)/Lead Zirconate Titanate (PZT) Composite Piezoelectric Films

“…[18][19][20][21][22] Currently, 0-3 PVDF/lead zirconate titanate (PZT) piezoelectric composites are mostly employed in research because of their superior properties, such as high permittivity and piezoelectric coefficient. [23][24][25][26][27][28] However, they are affected by many problems such as aggregation of fillers 29 and poor compatibility between the PVDF matrix and PZT fillers. To solve these problems, the surface modification of PZT particles to increase their dispersion and compatibility with PVDF has become a research hotspot.…”