Effect of CuO addition on structure and electrical properties of low temperature sintered quaternary piezoelectric ceramics

Abstract

The ceramics were prepared successfully by CuO additions to Pb[(Mn1/3Sb2/3)0.06(Ni1/2W1/2)0.02- (Zr0.49Ti0.51)0.92]O3. Effect of the addition on sintering temperature, structure and electrical properties of ceramics was investigated. The piezoelectric ceramics was prepared by solid-state reaction. Sintering experiments were accomplished at temperature between 950 and 1100 °C added 0.3-1.0 wt% CuO. The sintering temperature was reduced from 1250 °C (without CuO additions) to 970 °C when CuO-doped. The ceramics sintered at 970 °C for 2 h with 0.7 wt% CuO exhibited er = 1845, tan d = 0.15%, d33 = 395 pC/N, kp = 0.58 and Qm = 1830, which were the highest values. With increasing CuO doping, Tc becomes lower. Jahn-Teller effect was used to explain the contraction of c-axis and simultaneous extension of a-axis in the lattice. © Indian Academy of Sciences.