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Multi-phase structure and electrical properties of Bi0.5Li0.5ZrO3 doping K0.48Na0.56NbO3 lead-free piezoelectric ceramics


(1–x)K0.48Na0.56NbO3xBi0.5Li0.5ZrO3 (KNN–xBLZ, x = 0–0.06) lead-free piezoelectric ceramics were prepared by the conventional solid-state sintering method, and their phase structures and electric properties as well as TC were systematically investigated. The orthorhombic–tetragonal (O–T) two phases were detected in all (1–x)K0.48Na0.56NbO3xBi0.5Li0.5ZrO3 ceramics at 0.01 ≤ x ≤ 0.05. Due to the appropriate ratio between O phase and T phase (CO/CT= 45/55), high piezoelectric properties of d33 = 239 pC/N, kp = 34%, and Pr = 25.23 μC/cm2 were obtained at x = 0.04. Moreover, a high TC = 348°C was also achieved in KNN–xBLZ ceramic at x = 0.04. These results indicate that (1–x)K0.48Na0.56NbO3xBi0.5Li0.5ZrO3 system is a promising candidate for high-temperature piezoelectric devices.


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This work was supported by Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20130006110006) and National Natural Science Foundation of China (Grant Nos. 51272023 and 51472026).

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Correspondence to Boping Zhang.

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Peng, X., Zhang, B., Zhu, L. et al. Multi-phase structure and electrical properties of Bi0.5Li0.5ZrO3 doping K0.48Na0.56NbO3 lead-free piezoelectric ceramics. J Adv Ceram 7, 79–87 (2018).

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  • lead-free piezoelectric ceramics
  • potassium–sodium niobate (KNN)
  • solid-state sintering
  • multi-phase
  • electrical properties