0–3 Piezoelectric composite film with high d33 coefficient

The effect of processing conditions on the morphology, thermomechanical, dielectric, and piezoelectric properties of P(VDF-TrFE)/BaTiO3 composites

“…Two layers of solvent cast films were superposed and then pressed with 5 MPa, while heating from 25 to 200°C in 20 min, then holding at 200°C for 10 min, and cooling to 25°C in 20 min. Materials containing 15,30,45, and 60 vol% of BT-1 powder, and 60 vol% of BT-2 powder were prepared. A concentration of 60 vol% was the limit for which solvent cast films did not disintegrate upon removal from the glass support and for which it was still possible to obtain a consolidated film by compression molding.…”

“…Lead containing perovskites, and particularly PZT (Pb(Zr,Ti)O 3 -lead zirconium titanate), are at present the most widely used materials for sensors, actuators, and other electronic devices because of their excellent piezoelectric properties, ease of fabrication, and low cost manufacturing [14]. Hence, most of the studies on piezoelectric ceramicpolymer composites with high-piezoelectric activity deal with PZT-based materials [7,12,13,[15][16][17]. However, for environmental and health concerns it is desirable to substitute PZT with a lead-free piezoelectric ceramic and BaTiO 3 may offer a convenient alternative [18].…”

“…As pointed out in a recent review [33], modification of the surface of the ceramic fillers, through chemical grafting or the production of core-shell structures is key to improve filler dispersion, reduce porosity, thereby improving the mechanical, and electrical properties of the composites. Most of the existent studies focus on the dielectric [34][35][36][37][38][39][40][41][42][43] and electromechanical [4,7,13,15,17,25,44] properties of such composites and relatively few systematic studies on their thermal and mechanical behavior have been published so far. Furthermore the ceramic volume fractions considered are often much lower than those used in most applications [45], studies of highly filled composites mainly being limited to lead-based ferroelectric materials [46,47].…”

Structural, dielectric and piezoelectric properties of 0–3 PZT/PVDF composites

“…These composite films combine the interesting features of both the phases which includes high dielectric and piezoelectric properties of the ceramic and the flexibility and mechanical tolerance of the polymer. Their properties can be engineered for specific requirements depending on the volume fraction, connectivity and properties of the constituent phases [14][15][16][17][18][19].…”

“…There have been extensive studies on PZT based polymer composites with 0-3 connectivity [15][16][17][18][19][20][21][22][23][24][25][26][27]. Most of the studies dealt with the material properties of the films synthesized under the conditions which resulted in α rich PVDF phase.…”