Effect of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃ content on the microstructure and electrical properties of Bi_0.51(Na_0.82K_0.18) _0.50TiO₃ ceramics

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• 作者：Sha Qiao ; Jiagang Wu ; ^{msewujg@scu.edu.cn} ; ^{wujiagang0208@163.com} ; Bo Wu ; Binyu Zhang ; Dingquan Xiao ; Jianguo Zhu
• 关键词：C. Piezoelectric properties ; Lead-free ceramics ; Bi0.51(Na0.82K0.18)0.50TiO3 ; Ba0.85Ca0.15Ti0.90Zr0.10O3 ; Microstructure
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：August, 2012
• 卷：38
• 期：6
• 页码：4845-4851
• 文件大小：1532 K

摘要

(1鈭?em>x)Bi_0.51(Na_0.82K_0.18)_0.50TiO₃-xBa_0.85Ca_0.15Ti_0.90Zr_0.10O₃ [(1鈭?em>x)BNKT-xBCTZ] ceramics were prepared by the conventional solid-state method, and the effect of BCTZ content on their microstructure and electrical properties was investigated. A stable solid solution with a pure perovskite phase is formed between BNKT and BCTZ, and these ceramics have a coexistence of rhombohedral and tetragonal phases in the range of 0 鈮?#xA0;x < 0.15. Their T_m and T_d values are strongly independent on the BCTZ content. Moreover, the sintering temperature strongly affects the ferroelectric and piezoelectric properties of these ceramics with x = 0.02. These ceramics with x = 0.02 exhibit an optimum electrical behavior of d₃₃ 鈭?#xA0;205, k_p 鈭?#xA0;0.25, P_r 鈭?#xA0;31.8 渭C/cm², and E_c 鈭?#xA0;19.1 kV/cm together with a high T_d value of 鈭?1 掳C when sintered at 1180 掳C and poled at an optimum condition. As a result, the (1鈭?em>x)BNKT-xBCTZ ceramic is a promising candidate material for lead-free piezoelectric ceramics.