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Improvement on ferroelectric and piezoelectric properties of (K0.5Na0.5)NbO3 ceramic with Sr0.53Ba0.47Nb2O6 addition

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Abstract

(1 − x)(K0.5Na0.5)NbO3–xSr0.53Ba0.47Nb2O6 [(1 − x)KNN–xSBN] ceramics were synthesized by solid-state reaction technique. X-ray diffraction analysis of samples indicated that a single orthorhombic perovskite phase was formed as the x value is ≤0.02. Optimized piezoelectric properties with d 33 = 126 pC/N, K p = 0.39, Q m  = 201 were obtained for 0.98KNN–0.02SBN ceramic. The dielectric properties studies illustrated that both peaks of orthorhombic to tetragonal (T O–T ) and ferroelectric tetragonal to paraelectric cubic (T C ) phase transition shifted to lower temperature. The maximum remanent polarization (P r  = 22.5 μC/cm2) for 0.98KNN–0.02SBN was obtained by the polarization versus electric field (P–E) researches. AC conductivity of samples increased with increasing the temperature. The calculated activation energy of the dc conductivity was 0.9654 eV, which may be due to thermal activation.

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Acknowledgments

This work was supported by Natural Science Foundation of Guangxi (Nos. 2011GXNSFB018009, 2011GXNSFB018012 and 2012GXNSFDA053024), Natural Science Foundation of China (Nos. 51102058, 21061004 and 50962004), Research start-up funds Doctor of Guilin University of Technology (No.002401003281, No.002401003282).

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  1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, 541004, China

    Yiliang Wang, Xiuli Chen, Huanfu Zhou, Liang Fang, Laijun Liu & Hui Zhang

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Correspondence to Xiuli Chen.

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Wang, Y., Chen, X., Zhou, H. et al. Improvement on ferroelectric and piezoelectric properties of (K0.5Na0.5)NbO3 ceramic with Sr0.53Ba0.47Nb2O6 addition. J Mater Sci: Mater Electron 24, 770–775 (2013). https://doi.org/10.1007/s10854-012-0808-4

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