Preparation and Dielectric Properties of 1-3 La Modified PZT/IPN Piezoelectric Composites

Abstract

To prevent the potential cracking of gel fibers, La modified lead zirconate titanate (PLZT) ceramic fibers with diameter within 50µm were achieved by embedding into PLZT powders during the heat treatment. Then the 1-3 PLZT fiber/interpenetrating polymer network (IPN) piezoelectric composites were prepared by casting the IPN precursors onto the well aligned ceramic fibers. The influences of the heating temperatures and La amounts on the dielectric constant, dielectric loss with frequencies and piezoelectric constant of PLZT were investigated in detail. The morphologies of fibers and composites were observed by biological microscope. And also, the dielectric constant of PLZT fibers and PLZT fiber/IPN piezoelectric composites were detected.

Processing and electromechanical properties of lanthanum-doped Pb(Zr,Ti)O3 extruded piezoelectric fibres

“…The relatively low coercive field is possibly the result of lanthanum doping [18,28]. While the manufacture of thin lanthanum-doped fibres have been reported in the literature [21,29,30], the coercive field has rarely been measured. The low coercive field of the fibres reported here can aid the polarization of composite materials, in particular when the presence of interdigitated electrodes produces a highly non-linear electric field distribution.…”