The influences of sintering conditions on electrical properties of the 0.8Pb(Zr(1/2)Ti(1/2))O(3)-0.2Pb(Co(1/3)Nb(2/3))O(3) ceramics have been investigated with sintering temperatures of 1175, 1200, 1225, and 1250 degrees C and dwell times for 2, 6, and 10 h. The crystal structure of dense specimens showed coexistence between tetragonal, rhombohedral and pseudo cubic phases in all sintering temperatures, while tetragonal-rich phase appeared with increasing dwell times. A maximum dielectric constant was observed at sintering condition of 1200 degrees C for 2 h, while the transition temperature slightly increased with increasing dwell time. All ceramics also showed diffused phase transition behaviors with a minimum diffusivity at sintering condition of 1200 degrees C for 2 h. In addition, the polarization-electric field (P-E) hysteresis loops of the ceramic systems also changed significantly with sintering conditions. Interestingly, the ferroelectric parameters: remnant polarization (P(r)) and loop squareness (R(sq)) tended to increase with increasing sintering temperatures and dwell times. (C) 2009 Elsevier B.V. All rights reserved.