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Enhanced electrical properties of 0.7BiFeO3–0.3BaTiO3 lead-free ceramics obtained by optimizing the calcination temperature and time

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Abstract

0.7BiFeO3–0.3BaTiO3 ceramics were synthesized through the solid-state reaction method under different calcination temperatures (Tcal) and calcination times (td) to investigate their effects on the microstructure and electrical properties of the ceramics. The grains and phase structure change upon increasing Tcal or td. However, too high values of Tcal or td result in the volatilization of Bi2O3, which deteriorates the electrical properties of the ceramics. For Tcal = 800 °C and td = 2 h, a morphotropic phase boundary with mixed rhombohedral and pseudo-cubic phases appears, and the lowest leakage density and the maximum grain size are obtained, which leads to an improvement in the electrical properties (Pr = 26.7 µC/cm2, EC = 28.5 kV/cm, \({d}_{33}^{*}\) = 237 pm/V, and TC = 419 °C). This study indicates that Tcal and td influence considerably the electrical properties of the 0.7BiFeO3–0.3BaTiO3 ceramics.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52073129 and 51762030).

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52073129 and 51762030).

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Authors and Affiliations

  1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Guo-Dong Zhang, Jian-Qing Dai, Guang-Yuan Zhang & Yong-Shen Lu

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  1. Guo-Dong Zhang
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  2. Jian-Qing Dai
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  3. Guang-Yuan Zhang
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Contributions

G-DZ involved in methodology, investigation, data Visualization, writing—original draft, writing—review and editing. J-QD involved in conceptualization, supervision, resources and review. G-YZ: participated in contribution in material synthesis. Y-SL took part in technical support, supervision and manuscript revision.

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Correspondence to Jian-Qing Dai.

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Zhang, GD., Dai, JQ., Zhang, GY. et al. Enhanced electrical properties of 0.7BiFeO3–0.3BaTiO3 lead-free ceramics obtained by optimizing the calcination temperature and time. J Mater Sci: Mater Electron 33, 10226–10233 (2022). https://doi.org/10.1007/s10854-022-08011-4

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