Abstract
Sm3+ doped Sr1.90Ca0.15Na0.9Nb5O15 (SCNN: xSm3+) multifunctional ferroelectric ceramics with pure tetragonal tungsten bronze phase were synthesized via the conventional solid-state reaction method. The dielectric, ferroelectric characteristics and luminescent behaviors were systematically studied. The electrical properties suggested that a moderate Sm3+ doping could enhance the electrical performances. The orange-reddish emission originated from the transition of 4G5/2 → 6H7/2, 4G5/2 → 6H5/2 and 4G5/2 → 6H9/2 was observed under excitation wave of 406 nm. The strongest emission intensities were obtained at the Sm3+ doping content of 0.010. The degree of thermal quenching for the composition with x = 0.010 was relatively lower and the normalized emission intensity continued still 80% from room temperature to 150 °C. Besides, the transmittance in visible spectra of the SCNN: xSm3+ ceramics could be improved obviously, which was up to 50% at the doping amount of 0.010. These results show that the SCNN: xSm3+ multifunctional ferroelectric niobates have promising potential in electric-optical devices.
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Acknowledgements
This work was supported by the National Science Foundation of China (NSFC) (Grant nos. 21401123 and 51172136), the Central University Fund (GK201903037), and the China Scholarship Council (CSC).
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Hao, S., Li, J., Sung, Q. et al. Improved electrical properties and good thermal luminescent stability of Sm3+-doped Sr1.90Ca0.15Na0.90Nb5O15 multifunctional ceramics. J Mater Sci: Mater Electron 30, 13372–13380 (2019). https://doi.org/10.1007/s10854-019-01704-3
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DOI: https://doi.org/10.1007/s10854-019-01704-3