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

摘要

The ceramics were prepared successfully by CuO additions to Pb[(Mn_1/3Sb_2/3)_0.06(Ni_1/2W_1/2)_0.02-(Zr_0.49Ti_0.51)_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 0.3a€“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 e??€_r = 1845, tan e??? = 0.15%, e?‘‘₃₃ = 395 pC/N, e?‘?_p = 0.58 and e?‘?_m = 1830, which were the highest values. With increasing CuO doping, e?‘?_c becomes lower. Jahna€“Teller effect was used to explain the contraction of e?‘?-axis and simultaneous extension of e?‘?-axis in the lattice.