PZT ceramic particles/polyurethane composites formalism for mechanical energy harvesting

Abstract

More recently, the ferroelectric ceramic/polymer composites have been progressively replacing ferroelectric ceramics and polymers as they combine their interesting properties. Such as high compliance of polymers and high electromechanical coupling of ferroelectric ceramics those are required for piezoelectric transducer applications. At the same time, the ferroelectric ceramic/polymer composites formalism for predicting their energy-conversion capabilities is of both academic and industrial interest. The novelty of this paper is that the electrical power harvested by the PZT/PU polarized composite has been expressed in terms of the effective longitudinal piezoelectric coefficient (d33) of the composite via a parameter p related to the poling ratio. Besides, the parameter p, that is characterizing the PZT/PU composites with different longitudinal piezoelectric coefficients (d33), was evaluated. The other parameters of the electrical power expression were calculated using the Yamada model for the dielectric, piezoelectric and elastic constants. Finally, a good agreement was found between experience and model.

Polarization Parameters and Scaling Matter—How Processing Environment and Shape Factor Influence Electroactive Nanocomposite Characteristics

“…Piezo-polymer composites are also promising because of their excellent tailored properties [3,30]. These materials have many advantages including high electromechanical coupling factors [43][44][45][46][47], low acoustic impedance [23,[48][49][50], mechanical flexibility [51][52][53][54], broad bandwidth [55][56][57][58][59], and low mechanical quality factors [29,31,60,61]. The mechanical, electrical and acoustic properties of these materials can also be tailored according to the nature of application of the composite material [38,[62][63][64].…”

Piezoelectric and Electromechanical Characteristics of Porous Poly(Ethylene-co-Vinyl Acetate) Copolymer Films for Smart Sensors and Mechanical Energy Harvesting Applications

“…Today, piezoelectric polymers have been considered for energy harvesting applications [5][6][7][8]. The material has remarkable fatigue resistance and environmental stability [9], but it has not been recognized as a promising energy harvesting material because of its low piezoelectric constants when compared to PZT ceramics [10][11][12]. Recently, researchers investigated porous piezoelectric polymers consisting of an ionized cellular polypropylene film made by a chemical elaboration method using nitrogen gas [13].…”