The effects of Pb(Y1/2Nb1/2)O-3 (PYN) content on the microstructure and the electrical properties of Pb(Zr0.53Ti0.47)O-3 (PZT) have been studied. A Pb-deficient polycrystalline phase and a Y-Zr-Ti-rich phase are observed in all the samples. They are minor phases and are only observed using transmission electron microscopy (TEM). The remanent polarization P-r value is found to increase with increasing amount of Pb(Y1/2Nb1/2)O-3, and a highest value of 43.679 muC cm(-2) is obtained for the sample doped with 1.5 mol% Pb(Y1/2Nb1/2)O-3. (C) 2002 Elsevier Science B.V. All rights reserved.