Abstract
Lead-free piezoelectric ceramics with the composition of (1 − x)(K0.5Na0.5)NbO3–xBi(Mg0.5Ti0.5)O3 [(1 − x)KNN–xBMT, 0 ≤ x ≤ 0.04] were synthesized via solid-state reaction method. X-ray diffraction patterns revealed that the orthorhombic—tetragonal phase transition was present for (1 − x)KNN–xBMT with increasing the content of BMT. The study of dielectric properties illustrated that both peaks of orthorhombic—tetragonal (T O–T ) and tetragonal—cubic (T T–C ) phase transitions shifted to lower temperature. Through adding BMT, the electrical properties of KNN ceramics were obviously improved. The optimized piezoelectric and ferroelectric properties with d 33 = 127 pC/N, k p = 36.58 %, P r = 22.1 μC/cm2 were obtained as x = 0.01.
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Acknowledgments
This work was supported by Natural Science Foundation of Guangxi (Nos. 2013GXNSFAA019291 and 2012GXNSFDA053024), Project of Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment (No. KH2011YB018), Natural Science Foundation of China (Nos. 51102058, 21261007, and 21061004), Research start-up funds Doctor of Guilin University of Technology (No. 002401003282), Project of Department of Science and Technology of Guangxi (Nos. 1348020-11 and 11107006-42) and Guilin (Nos. 20120112-1 and 20120112-2), and Program to Sponsor Teams for Innovation in the Construction of Talent Highlands in Guangxi Institutions of Higher Learning.
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He, F., Chen, X., Chen, J. et al. (K0.5Na0.5)NbO3–Bi(Mg0.5Ti0.5)O3 solid solution: phase evolution, microstructure and electrical properties. J Mater Sci: Mater Electron 24, 4346–4350 (2013). https://doi.org/10.1007/s10854-013-1409-6
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DOI: https://doi.org/10.1007/s10854-013-1409-6