Abstract
\(\hbox {0.7BiFeO}_{{3}}{-}0.3(\hbox {Ba}_{0.85}\hbox {Ca}_{0.15})\hbox {TiO}_{{3}}\) (BF–BCT) ceramics were synthesized with a conventional solid-state reaction method. The electrical properties of the BF–BCT ceramics depend on the milling time via a planetary ball-milling technique. The results show that the sample prepared by milling for 40 h possesses a rather large remanent polarization of \(52 \,\upmu \hbox {C}/\hbox {cm}^{2}\) and this value is superior to that of Non-Pb BF-based ceramics at room temperature. Moreover, the values of remanent polarization were confirmed by a PUND measurement to eliminate the contribution of leakage current. We attributed the large remanent polarization to the decrease in oxygen vacancies confirmed by X-ray photoelectron spectroscopy results. Moreover, the BF–BCT ceramics exhibit the dielectric relaxation process caused by the diffusion of oxygen vacancies inside ceramics.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0403502), the Joint Funds of the National Natural Science Foundation of China and the Chinese Academy of Sciences’ Large-Scale Scientific Facility (Grant No. U1832115), and Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-SLH015).
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Shu, M., Huang, W., Qin, Y. et al. Enhanced ferroelectricity in relaxor \(\hbox {0.7BiFeO}_{{3}}{-}0.3(\hbox {Ba}_{0.85}\hbox {Ca}_{0.15})\hbox {TiO}_{{3}}\) ceramics using ball milling technique. J Mater Sci: Mater Electron 30, 20221–20228 (2019). https://doi.org/10.1007/s10854-019-02406-6
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DOI: https://doi.org/10.1007/s10854-019-02406-6