Abstract
The relaxor ferroelectrics as a new type of lead-free capacitor ceramic with high energy storage density has been extensively explored. In this paper, we reported a new recipe, (1−x)Ba0.7Sr0.3TiO3–xBi(Mg0.5Sn0.5)O3, known as (1−x)BST–xBMS. The samples were prepared by conventional solid-state reaction method with varying x (x = 0.00, 0.04, 0.08, 0.12, 0.16, 0.20). The dependence of phase structure, dielectric and energy storage performances on varying amount of BMS were systematically investigated. The results prove that the introduction of BMS alter the structure of the oxygen octahedron (B-O6), disturb the long-range ordering of dipoles, and produce numerous polar nanoregions (PNRs), made the (1−x)BST–xBMS ceramic transforms from ferroelectrics to relaxor ferroelectrics. In particular, the 0.84BST–0.16BMS ceramic demonstrates a significant energy storage density (Wrec = 0.73 J/cm3) and energy storage efficiency (ŋ = 87.2%) when subjected to an applied electric field of 170 kV/cm. At 160 kV/cm, the ceramic displays high power density (PD = 11.02 MW/cm3), current density (CD = 137.79 A/cm2), and an extremely shot discharge time (t0.9 = 50 ns). Additionally, it also exhibits good temperature stability (20–180 °C), frequency stability (40–200 Hz), and cycling stability (1–106).
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This study was supported by Lanzhou University. The all authors are grateful to the Key Labortory for Magnetism and Magnetic Materials of MOE and Audiowell Sensor Technology (Guangdong) Co., Ltd. (Grant No. 505000-071100116).
Funding
The funded was provided by Audiowell Sensor Technology (Guangdong) Co., Ltd. (Grant No. 505000-071100116).
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XJ: Experiment design and operation, data analysis, writing-original manuscript, revising manuscript. TY: Experiment operation, picture arranged. ZF: SEM test. FL: Experiment operation. SJ: Data analysis. MG: writing-original draft preparation, revising manuscript.
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Ji, X., Yu, T., Fu, Z. et al. Transformation of Ba0.7Sr0.3TiO3 from ferroelectrics to relaxor ferroelectrics by doping of Bi(Mg0.5Sn0.5) and realization of high energy storage. J Mater Sci: Mater Electron 35, 237 (2024). https://doi.org/10.1007/s10854-024-11986-x
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DOI: https://doi.org/10.1007/s10854-024-11986-x