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Phase structure and electrical properties of (1−x−y)K1−z Na z NbO3−x(0.8Bi0.5Na0.5ZrO3−0.2Bi0.5K0.5ZrO3)−yBiFeO3 lead-free ceramics

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Abstract

(1−x−y)K1−z Na z NbO3−x(0.8Bi0.5Na0.5ZrO3−0.2Bi0.5K0.5ZrO3)−yBiFeO3 lead-free ceramics were prepared by the conventional solid–state reaction process. In this work, we presented the evolutions of their phase structure and electrical properties by tailoring the compositions in KNN-based ceramics. By considering the XRD and ε r−T curves, a rhombohedral-orthorhombic-tetragonal (R–O–T) phase structure is identified in the composition region of 0.04 ≤ x < 0.05, 0.005 ≤ y ≤ 0.006 and 0.40 < z < 0.55, and the enhanced electrical properties (e.g., d 33~405 pC/N, k p~0.485, T C~321 °C, strain ~ 0.16% and d 33*~515 pm/V) was obtained in the ceramics of x = 0.04, y = 0.006, z = 0.50. Moreover, a good thermal stability was also observed in the ceramics. Therefore, such a research can benefit the sustainable development of KNN-based for the practical piezoelectric devices.

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Acknowledgements

This work was supported by Project (Grant Nos. 376815, KYTZ201312, KYTZ201703 and J201220) Supported by the Scientific Research Foundation of CUIT, the Foundation of Sichuan province science and technology support program, China (Grant No. GZ0198) and Scientific Research Project of Sichuan Provincial Department of Education (Grant No. 16ZA0216).

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Authors and Affiliations

  1. Sichuan Province Key Laboratory of Information Materials and Devices Application, Chengdu University of Information Technology, Chengdu, 610225, People’s Republic of China

    Bo Wu, Wenjuan Wu & Min Chen

  2. Department of Materials Science, Sichuan University, Chengdu, 610064, People’s Republic of China

    Bo Wu & Jian Ma

  3. Physics department, Southwest University for Nationalities, Chengdu, 610041, People’s Republic of China

    Jian Ma

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  1. Bo Wu
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  2. Jian Ma
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  3. Wenjuan Wu
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  4. Min Chen
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Correspondence to Bo Wu.

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Wu, B., Ma, J., Wu, W. et al. Phase structure and electrical properties of (1−x−y)K1−z Na z NbO3−x(0.8Bi0.5Na0.5ZrO3−0.2Bi0.5K0.5ZrO3)−yBiFeO3 lead-free ceramics. J Mater Sci: Mater Electron 28, 14049–14057 (2017). https://doi.org/10.1007/s10854-017-7256-0

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  • DOI: https://doi.org/10.1007/s10854-017-7256-0

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