Abstract
(1 − x)BaTiO3− xBi(Zn2/3Nb1/3)O3 [(1 − x)BT–xBZN, 0 ≤ x ≤ 0.2] ceramics were prepared via a conventional solid-state reaction method. X-ray diffraction (XRD) patterns and Raman spectra analysis show that the ceramics are tetragonal phase when x ≤ 0.02, and transform to pseudocubic phase as x ≥ 0.06. The temperature and frequency dependences of relative permittivity indicate a gradual crossover from a classic ferroelectric to relaxor ferroelectric. The dielectric relaxor behavior follows a modified Curie–Weiss law. The degree of the phase transition diffuseness (γ) and the deviation from the Curie–Weiss law \( (\Delta T_{\rm{d}} ) \) increase to the maximum at x = 0.08, and subsequently decrease with further increasing x values, which associated with the appearance of polar nanoregions on account of the formation of random fields included local electric fields and elastic fields. Nevertheless, the random fields may decrease by reason of the interaction between the local electric fields and elastic fields.
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Chen, X., Chen, J., Huang, G. et al. Relaxor Behavior and Dielectric Properties of Bi(Zn2/3Nb1/3)O3-Modified BaTiO3 Ceramics. J. Electron. Mater. 44, 4804–4810 (2015). https://doi.org/10.1007/s11664-015-4023-y
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DOI: https://doi.org/10.1007/s11664-015-4023-y