Preparation and Electrical Properties of PLZT/PVDF Nanocomposites

By : Chunying Min, Peng Nie, Dan Shen, Kaili Zhao, Xihui Chen

Page No: 199-209

Abstract
Nanocomposites of poly (vinylidene fluoride) (PVDF) filled with superficial hydroxylated lead lanthanum zirconate titanate (hydroxylated PLZT) nanoparticles were prepared by the solution blending method. The hydroxylated PLZT nanoparticles were prepared from crude lead lanthanum zirconate titanate (crude PLZT) in aqueous solution of H2 O2 . The microstructure and phase structure were shown through the methods of scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The influences of different volume ratios on the dielectric and piezoelectric properties of the hydroxylated PLZT/PVDF composites were analyzed by impedance analyzer. This research shows that the dielectric loss of the hydroxylated PLZT/PVDF nanocomposites is higher than that of the crude PLZT/PVDF nanocomposites. Furthermore, the addition of the PLZT nanoparticles causes the increase of the dielectric permittivity. Finally, compared with crude PLZT/PVDF nanocomposites, hydroxylated PLZT/PVDF nanocomposites have a higher dielectric constant and frequency dependence when the volume ratio of hydroxylated PLZT/PVDF is 0.4. It suggests that strong intermolecular force between hydroxylated PLZT fillers and PVDF matrix is the main reason accounting for the improvement of dielectric properties.

Authors :
Chunying Min, Peng Nie, Dan Shen and Kaili Zhao : School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Xihui Chen : School of Foreign Languages, Jiangsu University, Zhenjiang 212013, China