Structure and strain behavior of <00l> textured BNT-based ceramics by template grain growth

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• 作者：Wangfeng Bai ; Jigong Hao ; Fang Fu ; Wei Li ; Bo Shen ; Jiwei Zhai ; ^{apzhai@tongji.edu.cn}
• 关键词：Lead-free ceramics ; Strain properties ; Templated grain growth
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：97
• 期：Complete
• 页码：137-140
• 全文大小：801 K

文摘

<00l> textured 0.72(Bi_0.5Na_0.5)TiO₃-0.28SrTiO₃ ()lead-free piezoelectric ceramic was fabricated by template grain growth using plate-like SrTiO₃ as a template. The templated growth of <00 > oriented BNT-ST grains on the ST template resulted in textured ceramics with brick wall microstructures and a high degree of orientation of 82 % . Relationships between microstructure and electric properties of the ceramics with different amount of template contents were investigated. The textured ceramics showed enhanced electric properties compared with the random counterparts and exhibited excellent piezoelectric performance with strain level of 0.39 % at 70 kV/cm and normalized strain d₃₃^? (S_max/E_max) of 557 pm/V, revealing that the textured ceramics have tremendous potential for possible actuator applications.