The effect of artificial stress on structure, electrical and mechanical properties of Sr2+ doped BNT–BT lead-free piezoceramics
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The effect of Sr2+ doping on the microstructural, electrical and mechanical properties of 0.93(Bi0.5Na0.5)TiO3–0.07BaTiO3 ceramics was investigated. The X-ray diffraction and Raman results show the phase transition from tetragonal phase to rhombohedral phase induced by Sr2+ ions. The Sr2+ doping promotes grain growth, but refines grains with Sr2+ content continuously increasing. Three dielectric anomalies at Td, Tp and Tm are obvious, and Td is seriously affected by Sr2+ content. The Td peak is confirmed by the T1 peak at dynamic mechanical analysis. The coercive field (Ec) and remnant polarization (Pr) are modified by grain size effect and phase structure induced by Sr2+ doping. The piezoelectric coefficient can be effectively improved by Sr2+ doping.
This work is supported by the National Nature Science Foundation of China (Grant Nos. 11664006, 61741105), Guangxi Nature Science Foundation (Grant Nos. 2017GXNSFDA198024, 2018GXNSFDA281042, 2018GXNSFAA294039) and Guangxi Key Laboratory of Information Materials (Grant No. 171009-Z).
- 13.R.D. Zhou, T.T. Liu, M.M. Liu, X. Duan, Jiangsu Ceram. 42(2), 8–11 (2009)Google Scholar
- 26.C.R. Zhou, X.Y. Liu, Pie. Aco. 30(4), 480–482 (2008)Google Scholar
- 27.C.R. Zhou, X.Y. Liu, G.H. Chen, J.W. Xu, M.H. Jiang, Pie. Aco. 31(3), 398–400 (2009)Google Scholar
- 35.Q. Zhou, C.R. Zhou, H.B. Yang, C.L. Yuan, G.H. Chen, L. Cao, Q.L. Fan, J. Mater. Sci.: Mater. Electron. 25(1), 196–201 (2014)Google Scholar