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Microstructure and dielectric properties of Bi(Li0.5Ta0.5)O3-modified Ba0.6Sr0.4Ti0.7Zr0.3O3-based ceramics

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Abstract

A series of lead-free perovskite-structured dielectric ceramics of (1-x)Ba0.6Sr0.4Ti0.7Zr0.3O3-xBi(Li0.5Ta0.5)O3 ((1-x)BSTZ-xBLT, x = 0, 0.10, 0.15, and 0.20) were prepared through solid-state reaction method combined with conventional sintering. Specifically, for x = 0, 0.10, 0.15, and 0.20, the samples of (1-x)BSTZ-xBLT were sintered in air for 8 h at 1500 °C, 1300 °C, 1200 °C, and 1150 °C, respectively. All samples possess a pure perovskite structure and achieve a high relative density of 93 ~ 95%. The average grain size of all samples falls within 1.74 ~ 2.67 μm, and all composition elements distribute uniformly. The addition of BLT is conducive to reduce the sintering temperature of BSTZ. The critical electric field corresponding to the saturation polarization intensity of BSTZ increases from 69.4 kV/cm to 88.9 kV/cm as x rises from 0 to 0.10. The dielectric permittivity of 0.85BSTZ-0.15BLT and 0.80BSTZ-0.20BLT keeps stable (∆\(\varepsilon\)/\(\varepsilon\) 25 °C ≤  ± 15%) in the test temperature of − 100 ~ 350 °C. The activation energy (\(E\)α) of BSTZ enhances from 0.86 eV to 1.72 eV as x rises from 0 to 0.20, which contributes to the broadening of the band gap. These results suggest that (1-x)BSTZ-xBLT ceramics are promising candidates for high-temperature ceramic capacitors.

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Data availability

The data presented in this study are available upon request from the corresponding author.

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Funding

This research was supported by the National Natural Science Foundation of China (52262018), Yunnan Provincial Natural Science Key Foundation (202201AS070032), Yunnan Major Scientific and Technological Projects (202202AG050016), Yunnan Ten Thousand Talents Plan Young & Elite Talents Project (YNWR-QNBJ-2018–176), and National Undergraduate Training Programs for Innovation and Entrepreneurship (20211067400136).

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Authors and Affiliations

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

    Wu Lin, Bin Meng, Xinyu Ping, Congcong Fang, Han Zhang & Yingquan Chen

  2. Key Laboratory of Advanced Materials of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, Yunnan Province, People’s Republic of China

    Wu Lin, Bin Meng, Xinyu Ping, Congcong Fang, Han Zhang & Yingquan Chen

  3. Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650000, Yunnan Province, People’s Republic of China

    Qingqing Yang

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  1. Wu Lin
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Contributions

All authors contributed to the experimental design, data analysis, and manuscript organization. WL and BM designed the experimental plan, performed research, analyzed data, and wrote the paper. QY and XP analyzed the XRD data and revised the English grammar. CF, HZ, and YC reviewed and edited the manuscript at different stages.

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Correspondence to Qingqing Yang or Bin Meng.

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Lin, W., Yang, Q., Meng, B. et al. Microstructure and dielectric properties of Bi(Li0.5Ta0.5)O3-modified Ba0.6Sr0.4Ti0.7Zr0.3O3-based ceramics. J Mater Sci: Mater Electron 34, 554 (2023). https://doi.org/10.1007/s10854-023-10015-7

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