Abstract
In this paper, Pr3+ doped Na0.25K0.25Bi2.5Nb2O9 (NKBN-xPr3+) ceramics were successfully prepared via a conventional solid-state reaction process. The structural, dielectric, and piezoelectric properties as well as photoluminescence performance of the samples were systemically studied. All the ceramic samples possessed a pure two-layered bismuth layer-structure with the A2 1 am space group. Raman spectra revealed that the doped Pr3+ ions mainly replaced Bi3+ at the A-sites in the pseudo-perovskite layers. With increasing Pr3+ concentration, the Curie temperature and the maximum dielectric constant of the samples decreased, while the piezoelectric constant d 33 increased from 15 pC/N for x = 0 to 21 pC/N for x = 0.01. Addition, d 33 remained almost unchanged for all samples when the annealing temperature was lower than 450 °C. Under excitation with 452 nm light, the obtained samples exhibited a typical emission of Pr3+ ions, with the strongest red emission peak centered at 609 nm. The corresponding color tone of the ceramics shifted from red-orange to orange-yellow with increasing Pr3+ doping. The thermal quenching behavior of the photoluminescence of the x = 0.01 sample was also investigated in detail, and the thermal quenching activation energy was calculated to be 0.4473 eV. Our study indicated that NKBN-xPr3+ ceramics may have potential applications in multi-functional devices.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (51562014, 51602135, 61671224), Natural Science Foundation of Jiangxi, China (20133ACB20002, 20142BAB216009), the Foundation Provincial Department of Education (GJJ150931 and GJJ150911), and partially sponsored by the PhD Research Startup Foundation of the Jingdezhen Ceramic Institute. This work was also supported by the Foundation of Training Academic and Technical Leaders for Main Majors of Jiangxi (Grant No. 2010DD00800).
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Luo, Y., Jiang, X., Chen, C. et al. Structural, electrical, and photoluminescence properties of Pr3+ doped Na0.25K0.25Bi2.5Nb2O9 bismuth layer-structure ceramics. J Mater Sci: Mater Electron 28, 7517–7524 (2017). https://doi.org/10.1007/s10854-017-6442-4
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DOI: https://doi.org/10.1007/s10854-017-6442-4