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Competing effects of Ca doping on the phase transition and related properties in (Ba1–xCax)(Ti0.95Sn0.05)O3 ceramics

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Abstract

We present the competing effects of isovalent Ca doping into A-site on the properties of Ca-doped Ba(Ti,Sn)O3 ceramics. (Ba1–xCax)(Ti0.95Sn0.05)O3 (BCTS) ceramics with 0 ≤ x ≤ 0.06 were fabricated to investigate whether the increase in tetragonality, polarization and Curie temperature by Ca incorporation, which have been observed in Ca-doped BaTiO3 ceramics, would also occur in BCTS ceramics. We characterized the crystal structural, dielectric, and ferroelectric properties of the BCTS ceramics and strengthened ferroelectricity by the Ca incorporation was confirmed in the BCTS ceramics. However, at the same time, the BCTS ceramics exhibited a diffuse phase transition owing to the simultaneous occupation of the A- and B-sites, as evidenced by the unconventional trend of the critical exponent in the dielectric response and a monotonous decrease in strain hysteresis with increasing Ca content. We present a detailed analysis of these properties and propose competing roles of Ca doping in BCTS ceramics in detail.

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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 work was supported by Korea Institute for Advancement of Technology (KIAT) through the Competency Development Program for Industry Specialist (P0012451) by Ministry of Trade, Industry and Energy and also supported by Basic Science Research Program (2020R1I1A3052042) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Republic of Korea.

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  1. Department of Materials System Engineering, Pukyong National University, Busan, 48513, Korea

    Young Soo Lim, Subramanian Sasikumar & Min Ho Jang

  2. Department of Smart Green Technology Engineering, Pukyong National University, Busan, 48513, Republic of Korea

    Young Soo Lim & Hae Won Lee

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Lim, Y.S., Sasikumar, S., Lee, H.W. et al. Competing effects of Ca doping on the phase transition and related properties in (Ba1–xCax)(Ti0.95Sn0.05)O3 ceramics. J. Korean Ceram. Soc. 61, 170–177 (2024). https://doi.org/10.1007/s43207-023-00341-1

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