Effects of sintering temperature and poling conditions on the electrical properties of Bi_0.50(Na_0.70K_0.20Li_0.10)_0.50TiO₃ piezoelectric ceramics

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• 作者：Binyu Zhang ; Jiagang Wu ; ^{wujiagang0208@163.com} ; ^{msewujg@scu.edu.cn} ; Bo Wu ; Dingquan Xiao ; Jianguo Zhu
• 关键词：Bi0.50Na0.50TiO3 ; Sintering temperature ; Poling condition ; Piezoelectric properties ; Depolarization temperature
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：5 June, 2012
• 卷：525
• 期：Complete
• 页码：53-57
• 文件大小：1129 K

摘要

In this work, effects of sintering temperature and poling condition on the electrical properties of Bi_0.50(Na_0.70K_0.20Li_0.10)_0.50TiO₃ (BNKLT) ceramics were systematically investigated, and these ceramics were prepared by the normal sintering. A pure perovskite phase is demonstrated for these ceramics sintered at 1040-1140 掳C. The poling temperature and poling electric field strongly affect the piezoelectric properties of BNKLT ceramics, and an enhanced piezoelectric behavior of d₃₃ 鈭?#xA0;215 pC/N and k_p 鈭?#xA0;33.8%is demonstrated for the ceramic sintered at 1100 掳C when poled at a temperature of 鈭?5 掳C and 鈭?.68 kV/mm. The electric field-induced depolarization temperature of BNKLT ceramics is clearly observed by measuring the temperature dependence of the dielectric loss of these ceramics poled at different electric fields, and this value increases with an increase in poling electric field. These underlying physical mechanisms were addressed.