Abstract
In this investigation, MgO-doped BaTiO3 (BT) ceramics were prepared by a conventional solid-state sintering method. Perovskite-structure was identified by an X-ray diffraction method. Relatively high volume density and relative density were achieved with appropriate MgO contents. With MgO doping, the temperature stability of the dielectric constant of BT samples was drastically improved when the temperature is below their Curie temperatures. It is very interesting that both the energy storage density and breakdown electric field are enhanced by MgO doping compared to that of undoped BT. Particularly, a high energy storage density (Wc) of 0.9 J/cm3 can be achieved at 130 kV/cm with a high energy storage efficiency (η) of 73.3% in 0.25 wt% MgO doped composition. The detailed investigation and analysis can be found in the study.
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Acknowledgements
The work is supported by the National Natural Science Foundation of China (51672226, 51502248, 11704242); Natural Science Foundation of Shanghai, China (17ZR1447200); Fundamental Research Funds for the Central Universities (XDJK2017D013, XDJK2017D021); National College Student innovation and Entrepreneurship Program of Southwest University (201710635057, 201710635015).
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Liu, G., Zhang, L., Wu, Q. et al. Enhanced energy storage properties in MgO-doped BaTiO3 lead-free ferroelectric ceramics. J Mater Sci: Mater Electron 29, 18859–18867 (2018). https://doi.org/10.1007/s10854-018-0011-3
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DOI: https://doi.org/10.1007/s10854-018-0011-3