Title :
Piezoelectric properties of 1-3 composites of PZT in P(VDF-TrFE) copolymer
Author :
Kwok, K.W. ; Chan, H.L.W. ; Choy, C.L.
Author_Institution :
Dept. of Appl. Phys. & Mater. Res. Center, Hong Kong Polytech., Hung Hom, Hong Kong
Abstract :
PZT/P(VDF-TrFE) 1-3 composites were fabricated by embedding pre-sintered PZT rods in a pre-poled copolymer matrix. The rods were then poled using an electric field much lower than the coercive field of the copolymer. The electromechanical coupling factor kt, and the resonance characteristics of the composites were measured. The resonance characteristics of the composites were found to be dominated by the individual PZT rods. Poling of the copolymer matrix results in broadening of the main resonance peak. For transducer applications, it is advisable to pole the copolymer and the PZT rods in the same direction as this gives a higher kt value
Keywords :
composite materials; dielectric polarisation; lead compounds; piezoceramics; piezoelectric transducers; polymer blends; P(VDF-TrFE) copolymer; PZT 1-3 composites; PbZrO3TiO3Jk; coercive field; electromechanical coupling factor; piezoelectric properties; poling; pre-poled copolymer matrix; pre-sintered PZT rods; resonance characteristics; transducer applications; Ceramics; Composite materials; Impedance; Physics; Piezoelectric materials; Piezoelectric transducers; Piezoelectricity; Powders; Resonance; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522336
