Processing and electrical properties of (1-x)[(1-y)(Pb(Mg1/3Nb2/3)O3)-y(Pb(Yb1/2Nb1/2)O3)]-xPbTiO3 ceramics

Abstract

Ferroelectric ceramics in the vicinity of morphotropic phase boundary (MPB) with compositions represented as (1-x)[(1-y)(Pb(Mg1/3Nb2/3)O-3)-y(Pb(Yb1/2Nb1/2)O-3)]-xPbTiO(3) were prepared by solid state reaction. The addition of PYbN to PMN-PT decreased the sintering temperature from 1200 degrees C (y=0.25) to 1000 degrees C (y=0.75). The PT content, where the MPB was observed, increased with the PYbN addition. A remanent polarization value of 28.5 mu C/cm(2) and a coercive field value of 11 kV/cm were measured from 0.62[0.25MN-0.75PYbN]-0.38PT ceramics, which were close to the ones measured from PMN-0.32PT ceramics. In addition, the Curie temperature was found to increase with PYbN additions. (C) 2008 Elsevier B.V. All rights reserved.