The ceramics were prepared successfully by Pb3O4 and WO3 additions to 0.90Pb(Zr,Ti)O-3-0.03Pb(Fe2/3W1/3)O-3-0.07Pb(Mn1/3Nb2/3)O-3 (0.90PZT-0.03PFW-0.07PMN). Effects of the additions on the structure, bulk density and electrical properties of ceramics were investigated. The results revealed that the proper additions Of WO3 with 2.0 wt.% Pb3O4 excess could form liquid phase that promoted the densification of the ceramics. The fracture mode changed from transgranular to intergranular as increasing WO3 with 2.0 wt.% Pb3O4 excess. The piezoelectric and dielectric properties were also promoted by excess of Pb3O4 and WO3 additions. The optimized electrical properties were obtained at excess of 2.0 wt.% Pb3O4 and 0.15 wt.% WO3. The parameters were as follows: d(33) = 351 pC/N, Kp = 0.64, Q(m) = 1882, epsilon(r) = 1798, tan delta = 0.0052, P-r = 19.94 mu C/cm(2) and E-c = 11.98 kV/cm, which shows high K-p, Q(m), d(33) and low tan delta can be obtained simultaneously by adding WO3 addition to Pb3O4 modified PZT-PFW-PMN system. (C) 2006 Elsevier Ltd. All rights reserved.