Enhanced electromechanical properties in <00l>-textured (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ lead-free piezoceramics

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• 作者：Wangfeng Bai^a ; Daqin Chen^a ; Peng Li^b ; Bo Shen^b ; Jiwei Zhai^b ; ^{apzhai@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhenguo Ji^a
• 关键词：D. Perovskites ; Templated grain growth ; Lead-free ceramics ; Strain response
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：42
• 期：2
• 页码：3429-3436
• 全文大小：1745 K

文摘

<001>-textured (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ (BCZT) lead-free piezoelectric ceramics were fabricated by templated grain growth using plate-like BaTiO₃ as template. The effects of <001> orientation degree on the microstructure and resulting changes in dielectric, ferroelectric, piezoelectric, and strain properties were systematically investigated to develop the lead-free piezoelectric materials with an excellent actuating performance. The electromechanical properties were found to increase monotonously with the increase in the degree of texturing and dramatically enhanced for the textured BCZT ceramics in the optimized microstructure compared with randomly-oriented counterparts. Highly textured ceramics showed excellent electromechanical properties of d₃₃=462 pC/N, k_p=47%, S=0.187%, and S_max/E_max=621 pm/V at room temperature. These results indicates that the textured ceramics are promising candidates for environmentally friendly actuator devices with high performance.