Abstract
K0.5Na0.5Nb(1−y)Sb y O3 (KNNSy, y = 0.02–0.10) piezoceramics are obtained from the corresponding powder synthesized via a relatively low temperature solvothermal method. Crystalline structures and surface morphologies of these samples are analyzed by X-ray diffraction and scanning electron microscopy. The optimal sintering temperatures of KNNSy ceramics are controlled within 980–1,050 °C. The piezoelectric properties of the KNNSy ceramics are essentially affected by orthorhombic–tetragonal polymorphic phase transition. KNNS0.06 ceramic shows the maximum piezoelectric coefficient (d 33) (134 pC/N). In addition, the aging behavior of KNNSy ceramics leads to the instability of their piezoelectric properties, which can be well explained according to defect symmetry conforming principle.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (No. 50872117), the SRF of Hunan Provincial Education Department (10C1249) and the Innovation Found Project for Graduate Student of Hunan Province (CX2011B258).
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Gong, Y., Yang, G., Li, X. et al. Piezoelectric properties and aging mechanism of K0.5Na0.5Nb(1−y)Sb y O3 piezoceramics prepared by low temperature solvothermal method. J Mater Sci: Mater Electron 23, 1910–1915 (2012). https://doi.org/10.1007/s10854-012-0879-2
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DOI: https://doi.org/10.1007/s10854-012-0879-2