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Microstructure, dielectric and ferroelectric properties of (1-x)Bi0.5Na0.5TiO3-x(0.8Ba0.9Sr0.1TiO3-0.2BiFeO3) lead-free ceramics

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Abstract

(1-x)Na0.5Bi0.5TiO3-x(0.8Ba0.9Sr0.1TiO3-0.2BiFeO3)[(1-x) NBT-x(0.8BST-0.2BFO), x = 0, 0.04, 0.08, 0.12]) ceramics were prepared by conventional solid reaction method, and the effects of composition on the microstructure and electrical properties were comparatively studied. The X-ray diffraction results confirm a pure perovskite structure and a cubic structure of the ceramics possess, no obvious impurity phase can be observed. In addition, compared with x = 0, the diffraction peak intensities of other components shift to the left side, indicating that BST and BFO have been entered into the NBT lattice in varying degrees. There are two different morphologies of grains, indicating the uniform distribution of composition, and the grain size along the length direction ranges from 6.19 μm (x = 0.08) to 14.35 μm (x = 0.04). The addition of 0.8BST-0.2BFO retards the grain growth and induces two dielectric anomalies at high temperatures, and the relaxation process has been proved. The dielectric constant of the sample x = 0.08 is the lowest, which is smaller than 800, while it raises to larger than 1000 when x = 0.04. The Curie temperature decreases significantly after doping. After a large amount of BST and BFO doping, the ferroelectric long-range order of the ceramics is destroyed, and the hysteresis loop changes to elongated shape. When the doping amount is x = 0.04, a larger remanant polarization ~ 25 μC/cm2) is obtained. The ferroelectric hysteresis loops with high concentration of 0.8BST-0.2BFO show more slim shape, indicating stronger relaxation behavior.

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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The present work has been supported by the Self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences; the Key Research Program of the Chinese Academy of Sciences (ZDRW-CN-2021-3), the Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJZD-M201901501, KJQN201801509), the Scientific and Technological Research Key Program of Chongqing Municipal Education Commission (KJZD-K20220150), the Chongqing Research Program of Basic Research and Frontier Technology (cstc2019jcyj-msxmX0071, cstc2021jcyj-msxmX0008, cstc2021jcyj-msxmX0039, cstc2021jcyj-msxmX0599), the Program for Creative Research Groups in University of Chongqing (CXQT19031), the Innovation Program for Chongqing's Overseas Returnees (cx2019159), the Natural Science Foundation of Chongqing (cstc2020jcyj-zdxmX0008, cstc2020jcyj-msxmX0030), the Leading Talents of Scientific and Technological Innovation in Chongqing(CSTCCXLJRC201919), the special project of Chongqing technology innovation and application development (cstc2020jscx-msxmX0218), The Provincial and Ministerial Co-constructive of Collaborative Innovation Center for MSW Comprehensive Utilization, the Scientific and Technological Research Young Program of Chongqing Municipal Education Commission(KJQN202001528), the Research Foundation of Chongqing University of Science and Technology (No. Ckrc2019020), and the Postgraduate Technology Innovation Project of the Chongqing University of Science and Technology (Grant No. 2021187).

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The authors declare that except the “Acknowledgments” part, no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China

    Runjie Wu, Liyuanjun Huang, Ligeng Jin & Rongli Gao

  2. Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing, 401331, China

    Runjie Wu, Liyuanjun Huang, Ligeng Jin & Rongli Gao

  3. School of Materials and Engineering, Panzhihua University, Panzhihua, 617000, China

    Lang Bai

  4. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, 341119, China

    Zhiyi Xu

  5. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Zhiyi Xu

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  1. Runjie Wu
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Contributions

All authors contributed to the study conception and design. Material preparation are performed by Ruijie Wu, data collection are performed by LiYuanJun Huang, Ligeng Jin, and Rongli Gao, data analysis were performed by Lang Bai. The first draft of the manuscript was written by Zhiyi Xu, all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Wu, R., Huang, L., Jin, L. et al. Microstructure, dielectric and ferroelectric properties of (1-x)Bi0.5Na0.5TiO3-x(0.8Ba0.9Sr0.1TiO3-0.2BiFeO3) lead-free ceramics. J Mater Sci: Mater Electron 33, 25404–25418 (2022). https://doi.org/10.1007/s10854-022-09246-x

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