Pb((Zn1/3Nb2/3)(0.16)(Fe1/2Nb1/2)(0.48)(Fe2/3W1/3)(0.36))O-3 (PZFNW) relaxor ferroelectric ceramics produced by a reaction-sintering process of low sintering temperatures were investigated. Without any calcination, the mixture of PbO, Zn(NO3)(2), Fe(NO3)(3), Nb2O5 and WO3 was pressed and sintered directly. PZFNW ceramics of 100% perovskite phase were obtained after sintering at 830-950 degrees C. A density of 8.66 g cm(-3) (98.6% of theoretical value) was obtained after sintering at 930 degrees C for 2h. Grain sizes of 2-7 and 3-12 mu m were formed after sintering at 830-950 degrees C for 2 and 4 h, respectively. The dielectric constant for 1 kHz at room temperature increases with sintering temperature and reaches the value of 17,400 at 930 degrees C due to the increased density and grain size. (c) 2005 Elsevier B.V. All rights reserved.