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Structure, dielectric, and ferroelectric properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics sintered at various temperatures

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Abstract

The Ba0.85Ca0.15Zr0.1Ti0.9O3 (referred to as BCZT) ceramic powders were synthesized by the sol–gel method followed by calcining, and then the ceramics were obtained by sintering at different temperatures varied from 1200 to 1350 °C. The effects of sintering temperature on the microstructure, impedance spectroscopy, dielectric, and ferroelectric properties for BCZT ceramics have been thoroughly investigated. The pure perovskite structure and homogenous microstructure with high relative density (> 90%) for all BCZT ceramics are identified by XRD analysis and SEM measurement, and the stability is identified by the variable-temperature dielectric characterization. The impedance spectroscopy and well-defined polarization–electric field hysteresis loops for BCZT samples were detected at room temperature. In particular, the BCZT ceramic sintered at 1300 °C resulted the highest dielectric constant (εr ~ 2170), the lowest dielectric loss (tan δ ~ 0.027), and the highest grain boundary resistance (Rgb ~ 8.9 × 107 Ω cm).

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Acknowledgements

This work has been financially supported by the Key Scientific Research Foundation in Henan Province (No. 19B430005), the National Natural Science Foundation of China (Nos. 51402091, 51601059, 11847136), the Special Scientific Research Foundation in Henan Normal University (No. 20180543), and the National University Student Innovation Program (No. 20160098).

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Authors and Affiliations

  1. Laboratory of Functional Materials, Scholl of Physics, Henan Normal University, and Henan Key Laboratory of Photovoltaic Materials, Xinxiang, 453007, People’s Republic of China

    X. W. Wang, B. H. Zhang, Y. Y. Li, Y. C. Shi, L. Y. Sun, G. Feng, C. L. Li, Y. F. Liang, Y. P. Zheng, S. Y. Shang, J. Shang, Y. C. Hu & S. Q. Yin

  2. Laboratory of Dielectric Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People’s Republic of China

    B. H. Zhang

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Wang, X.W., Zhang, B.H., Li, Y.Y. et al. Structure, dielectric, and ferroelectric properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics sintered at various temperatures. J Mater Sci: Mater Electron 31, 4732–4742 (2020). https://doi.org/10.1007/s10854-020-03030-5

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