Effect of Ba<sub>0.85sub>Ca<sub>0.15sub>Ti<sub>0.90sub>Zr<sub>0.10sub>O<sub>3sub> content on the microstructure and electrical properties of Bi<sub>0.51sub>(Na<sub>0.82sub>K<sub>0.18sub>) <sub>0.50sub>TiO<sub>3sub> ceramics
- 作者：Sha Qiao ; Jiagang Wu<sup> ; sup><sup>msewujg@scu.edu.cnsup><sup> ; sup><sup>wujiagang0208@163.comsup> ; 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<sub>0.51sub>(Na<sub>0.82sub>K<sub>0.18sub>)<sub>0.50sub>TiO<sub>3sub>-xBa<sub>0.85sub>Ca<sub>0.15sub>Ti<sub>0.90sub>Zr<sub>0.10sub>O<sub>3sub> [(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<sub>msub> and T<sub>dsub> 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 d<sub>33sub> 鈭?#xA0;205, k<sub>psub> 鈭?#xA0;0.25, P<sub>rsub> 鈭?#xA0;31.8 渭C/cm<sup>2sup>, and E<sub>csub> 鈭?#xA0;19.1 kV/cm together with a high T<sub>dsub> 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.