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Phase structure, electrical properties, and component stability in (1 − x)K0.40Na0.60Nb0.96Sb0.04O3–x(Bi0.92Nd0.08)0.5Na0.5ZrO3 lead-free ceramics

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Abstract

(1 − x)K0.40Na0.60Nb0.96Sb0.04O3–x(Bi0.92Nd0.08)0.5Na0.5ZrO3 (KNNS–xBNNZ) lead-free piezoceramics have been synthesized by a conventional solid state sintering method, and the effects of BNNZ content on their phase structure and electrical properties were investigated. The phase boundary of rhombohedral–orthorhombic–tetragonal (R–O–T) has been formed in the composition range of 0.030 ≤ x ≤ 0.040. An optimal comprehensive performance (e.g., d33 ~ 470 ± 10 pC/N, kp ~ 0.50 ± 0.02, TC ~ 283 °C, εr ~ 1950, tanδ ~ 0.043, Strain ~ 0.135%, and d33* ~ 450 pm/V) is obtained in the ceramics with x = 0.035. Moreover, a relatively good component stability of piezoelectric properties (d33 ~ 402–470 pC/N, kp ~ 0.485–0.524, Strain ~ 0.133–0.135%, and d33* ~ 443–450 pm/V) is gained in a broad component range from 0.030 to 0.045, which is benefited from the contribution of multiphase boundary (R–O–T, R–T). Therefore, we believe that KNNS–xBNNZ ceramics opens a window for the practical applications in piezoelectric material markets.

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Acknowledgements

Authors gratefully acknowledge the support of the National Science Foundation of China (NSFC No. 51722208, 51332003, and 51702028).

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Authors and Affiliations

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

    Jian Ma, Bo Wu & Jiagang Wu

  2. Physics Department, Sichuan Province Key Laboratory of Information Materials, Southwest Minzu University, Chengdu, 610041, People’s Republic of China

    Jian Ma

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

    Bo Wu

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Ma, J., Wu, B. & Wu, J. Phase structure, electrical properties, and component stability in (1 − x)K0.40Na0.60Nb0.96Sb0.04O3–x(Bi0.92Nd0.08)0.5Na0.5ZrO3 lead-free ceramics. J Mater Sci: Mater Electron 29, 17209–17216 (2018). https://doi.org/10.1007/s10854-018-9813-6

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