Abstract
The Bi1/2Na1/2Ti1−x (Nd1/2Ta1/2) x O3 lead-free piezoelectric ceramics were fabricated by a conventional solid-state reaction method. The phase structure, microstructure, and dielectric, ferroelectric and piezoelectric properties of the ceramics were investigated. A reduction of small amount of oxygen vacancies, a significant effect in grain size due to the (Nd1/2Ta1/2)4+ doping, led to the enhancements of the dielectric, ferroelectric and piezoelectric properties of Bi1/2Na1/2Ti1−x (Nd1/2Ta1/2) x O3 ceramics, and the optimized modification was x = 0.006. The electrical properties of modified samples were deteriorated with further doping (x >0.006), owing to an increase in the concentration of oxygen vacancies. The BNT-NT ceramics with x = 0.006 was found to have a high remnant polarization (P r ) of 34.7 μC/cm2 and a piezoelectric constant (d 33 ) of 110 pC/N.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Nos. 51372110, 51402144, 51302124), the National High Technology Research and Development Program of China (No. 2013AA030801), the Natural Science Foundation of Shandong Province of China (No. ZR2012EMM004), Science and Technology Planning Project of Guangdong Province, China (No. 2013B091000001), Independent innovation and achievement transformation in Shandong Province special, China (No. 2014CGZH0904), the Project of Shandong Province Higher Educational Science and Technology Program (Nos. J14LA11, J14LA10), Research Foundation of Liaocheng University (Nos. 318011301, 318011306, 318051407).
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Cheng, R., Duan, Y., Chu, R. et al. Investigation of structural and electrical properties of B-site complex ion (Nd1/2Ta1/2)4+-doped Bi1/2Na1/2TiO3 lead-free piezoelectric ceramic. J Mater Sci: Mater Electron 26, 5409–5415 (2015). https://doi.org/10.1007/s10854-015-3094-0
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DOI: https://doi.org/10.1007/s10854-015-3094-0