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 0.3â€�??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 ðœ�?_r = 1845, tan ð›�? = 0.15%, ð‘�??₃₃ = 395 pC/N, ð‘�?_p = 0.58 and ð‘�??_m = 1830, which were the highest values. With increasing CuO doping, ð‘�??_c becomes lower. Jahnâ€�?�Teller effect was used to explain the contraction of ð‘�?-axis and simultaneous extension of ð‘�?-axis in the lattice.

[学科分类] 材料工程

[关键词] Sintering;microstructure-final;piezoelectric properties;perovskites;Jahnâ€�?�Teller effect.