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High strain and high energy density of lead-free (Bi0.50Na0.40K0.10)0.94Ba0.06Ti(1−x)(Al0.50Ta0.50)xO3 perovskite ceramics

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Abstract

Lead-free perovskite materials for capacitors have been recognized worldwide attention in recent times with high storage energy density and efficiency. A series of (Bi0.50Na0.40K0.10)0.94Ba0.06Ti(1−x)(Al0.50Ta0.50)xO3 ceramics are synthesized using traditional mixed oxide route. All ceramics are in single-phase perovskite-like structure. At room temperature, high storage energy density, Wr ~ 1.67 J/cm3, and conversion efficiency, η ~ 81.46%, are perceived for x = 0.06 composition at 115 kV/cm. Temperature-dependent study obtains Wr ~ 1.21 J/cm3 and η ~ 84.96% at 80 °C with 80 kV/cm field. In addition, composition x = 0.06 is fatigue-free from 1 to 105 cycles measured at 80 kV/cm field. Furthermore, ceramic x = 0.04 is obtained a high bipolar strain ~ 0.31% at 80 kV/cm compared to other compositions. Hence, the compositions x = 0.06 for high energy density and x = 0.04 for strain might be useable in many electronic components.

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Acknowledgements

This work has been supported by the National Nature Science Foundation (51672220), the National Defense Science Foundation (32102060303), the Fundamental Research Funds for the Central Universities of NPU (3102019GHXM002), the SKLSP Project (2019-TZ-04), and the Open-end Fund of International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, China. We would also like to thank the Analytical and Testing Center of Northwestern Polytechnical University for SEM, TEM, AFM, Raman, and XRD test.

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  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Arun Kumar Yadav, Huiqing Fan, Benben Yan, Chao Wang, Jiangwei Ma, Mingchang Zhang, Zhinan Du & Weijia Wang

  2. Institute of Culture and Heritage, Northwestern Polytechnical University, Xi’an, 710072, China

    Huiqing Fan & Wenqiang Dong

  3. International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, Jiaozuo, 454001, China

    Huiqing Fan & Shuren Wang

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Yadav, A.K., Fan, H., Yan, B. et al. High strain and high energy density of lead-free (Bi0.50Na0.40K0.10)0.94Ba0.06Ti(1−x)(Al0.50Ta0.50)xO3 perovskite ceramics. J Mater Sci 55, 11137–11150 (2020). https://doi.org/10.1007/s10853-020-04877-z

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