Sintering temperature-induced electrical properties of (Ba_0.90Ca_0.10)(Ti_0.85Zr_0.15)O₃ lead-free ceramics

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• 作者：Jiagang Wu^a ; ^{wujiagang0208@163.com} ; ^{msewujg@scu.edu.cn} ; Dingquan Xiao^a ; Bo Wu^a ; Wenjuan Wu^a ; Jianguo Zhu^a ; Zhengchun Yang^b ; John Wang^b
• 关键词：A. Ceramics ; C. Electron microscopy ; C. X-ray diffraction ; D. Microstructure ; D. Piezoelectricity
• 刊名：Materials Research Bulletin
• 出版年：2012
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：May, 2012
• 卷：47
• 期：5
• 页码：1281-1284
• 文件大小：768 K

摘要

Effects of the sintering temperature on the microstructure and electrical properties of (Ba_0.90Ca_0.10)(Ti_0.85Zr_0.15)O₃ (BCTZ) lead-free piezoelectric ceramics have been studied, where these ceramics were prepared by the conventional oxide-mixed method at varied sintering temperatures from 1300 掳C to 1500 掳C. These BCTZ ceramics exhibits a phase transition from a rhombohedral phase to the coexistence of rhombohedral and tetragonal phases with an increase of sintering temperature. With an increase of sintering temperature, their relative density and average grain size gradually increase, and electrical properties are improved greatly. These BCTZ ceramics sintered at 鈭?440 掳C have optimum electrical properties: d₃₃ 鈭?#xA0;442 pC/N and k_p 鈭?#xA0;48.9%, making it a promising material for lead-free piezoelectric ceramics.