Abstract
The structural origin of high piezoelectricity in perovskite-type relaxor ferroelectrics is a fundamental issue that remains elusive for decades. In this study, high and unstable piezoelectricity for the poled ceramics, accompanied with a crossover from a nonergodic relaxor to an ergodic relaxor state at room temperature, has been observed for 0.95(Bi0.5Na0.5)1-x (Li0.5Sm0.5) x TiO3–0.05BaTiO3 ceramics with x = 0.06. The result suggests that the high piezoelectric activity origins from the electric field-induced-ordered nanodomains. The rapid loss of piezoelectricity stems from the reversibility of the ordered nanodomains after removing applied electric field.
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Acknowledgments
Part of this work was financially supported by the National Nature Science Foundation of China (11564007, 61561015, and 61361007) and Guangxi Key Laboratory of Information Materials (1310001-Z) and the Natural Science Foundation of Guangxi (Grants No. 2012GXNSFGA60002 and 2015GXNSFAA 139250) and Open Project of Key Laboratory of New Electric Functional Materials of Guangxi Colleges and Universities (DGN201504).
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Yang, L., Xu, J., Li, Q. et al. High piezoelectricity associated with crossover from nonergodicity to ergodicity in modified Bi0.5Na0.5TiO3 relaxor ferroelectrics. J Electroceram 37, 23–28 (2016). https://doi.org/10.1007/s10832-016-0036-z
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DOI: https://doi.org/10.1007/s10832-016-0036-z