Ferroelectric and piezoelectric properties of [(Ba_1?x/2Bi_x)_0.85Ca_0.15](Ti_0.90Zr_0.10)O₃ lead-free piezoelectric ceramics

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• 作者：Tao Chen ; ^{chentaocmc@163.com} ; ^{myfriendsroom@163.com} ; Ting Zhang ; Jifang Zhou ; Jianwei Zhang ; Yuhong Liu ; Guangchang Wang
• 关键词：A. Ceramics ; C. Electron microscopy ; D. Piezoelectricity
• 刊名：Materials Research Bulletin
• 出版年：2012
• 出版时间：April, 2012
• 年：2012
• 卷：47
• 期：4
• 页码：1104-1106
• 全文大小：823 K

文摘

Bismuth-modified barium calcium zirconate titanate ceramics [(Ba_1?x/2Bi_x)_0.85Ca_0.15](Ti_0.90Zr_0.10)O₃ (BBCTZ) have been prepared by the conventional solid-state reaction method, and effects of Bi content on the electrical properties of BBCTZ ceramics were systematically investigated. BBCTZ ceramics endure a phase transition from the coexistence of rhombohedral and tetragonal phases, a tetragonal phase, to a cubic phase with increasing Bi content. The Curie temperature, the remanent polarization, and the dielectric loss of BBCTZ ceramics gradually decrease with increasing the Bi content. The BBCTZ ceramic with x = 0.0075 exhibits an optimum electrical behavior: d₃₃ ?#xA0;361 pC/N and k_p ?#xA0;40.2 % .