Fabrication, temperature stability and characteristics of Pb(Zr_xTi_y)O₃-Pb(Zn_1/3Nb_2/3)O₃-Pb(Ni_1/3Nb_2/3)O₃ piezoelectric ceramics bimorph

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• 作者：Xiaolian Chao^a ; ^b ; Lili Yang^a ; ^b ; Hong Pan^a ; ^b ; Zupei Yang^a ; ^b ; ^{yangzp@snnu.edu.cn}
• 关键词：C. Dielectric properties ; C. Piezoelectric properties ; Planar coupling coefficient ; Piezoelectric ceramics bimorph
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：May, 2012
• 卷：38
• 期：4
• 页码：3377-3382
• 文件大小：734 K

摘要

The phase structure, microstructure, electrical properties and the temperature stabilities of Pb(Zr_xTi_y)O₃-Pb(Zn_1/3Nb_2/3)O₃-Pb(Ni_1/3Nb_2/3)O₃ (PZT-PZN-PNN) ceramics are investigated in order to identify the morphotropic phase boundary composition in this system. The pure perovskite structure could be confirmed in all ceramics. The ceramics obtains the optimal piezoelectric properties at Zr/Ti ratio = 0.985, which are listed as follows: d₃₃ = 552 pC/N, K_p = 0.77, Q_m = 70, tan 未 = 0.0150 and 蓻_r = 2659. When Zr/Ti ratio is 0.985, the values of 螖f_r/f_r25 掳C and 螖K_p/K_p25 掳C curves fluctuate around the zero, which indicate that the favorable temperature stability are obtained. Meanwhile, piezoelectric ceramics bimorph using PZT-PZN-PNN ceramics with Zr/Ti ratio of 0.985 is fabricated successfully by the tape-casting technology. The piezoelectric ceramics bimorph sintered at 1000 掳C exhibits a larger displacement of 1683 渭m at the working voltage of 180 V. The results indicate that the piezoelectric ceramics bimorph meets the needs of the needle selecting mechanism of electronic jacquard.