Abstract
Multifunctional perovskite oxides [(Ba0.85Ca0.15)1-xEux](Ti0.9Hf0.1)O3 (Eu-BCTH) were prepared by the solid-state reaction method, and the effects of Eu doping on structure, density, and performance were studied. The Eu-BCTH ceramics sintered at 1450 °C for 3 h exhibit a near-pure perovskite structure accompanied by high relative density and densified microstructure morphology. The Eu-doped BCTH ceramics present complicated dielectric behaviour, that is, normal ferroelectrics accompanied by slight diffusive ferroelectric phase transition characteristics. Excellent ferroelectricity and piezoelectricity can be obtained in the Eu-doped BCTH ceramics simultaneously, which present significant dependency on the Eu doping content. Under 457-nm light excitation, the Eu-BCTH ceramics emit strong red fluorescence centering around 689 nm, relating to the 5D0 → 7F4 electron transition, accompanied by several weak fluorescence emissions. The 0.5 mol% Eu-doped BCTH ceramics present excellent piezoelectric and florescent properties simultaneously.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51577015), the Applied Basic Research Programs of Changzhou (No. CJ20179020), the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions, and the Priority Academic Program Development of Jiangsu Higher Education Institutions. Shanshan Zhang thanks the Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX19_1753) for financial support.
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Zhang, S., Fang, B., Zhao, X. et al. Multifunctional performance derived by Eu doping in (Ba0.85Ca0.15)(Ti0.9Hf0.1)O3 lead-free ceramics. J Mater Sci: Mater Electron 30, 19404–19414 (2019). https://doi.org/10.1007/s10854-019-02302-z
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DOI: https://doi.org/10.1007/s10854-019-02302-z