Abstract
(1 − x)BaTiO3–xBi(Zn0.75W0.25)O3 [BT–BZW, 0 ≤ x ≤ 0.2] solid solutions were fabricated via a conventional solid-state reaction method. The relationships among compositions, crystal structures, and dielectric properties were investigated. X-ray diffraction patterns showed that a phase transformation from tetragonal to pseudocubic was observed at 0.03 ≤ x ≤ 0.1. Raman spectra analysis also illustrated that the long-range ferroelectric order is disrupted from these compositions. Dielectric data showed that as the BZW addition was small (0.01 ≤ x ≤ 0.04), the magnitude of permittivity maxima decreased, and the Curie temperature was almost irrespective of BZW content (x). While the dielectric temperature stability and relative permittivity of BT below the Curie temperature were effectively improved. In particular, the ceramic with x = 0.04 possesses the dielectric properties with high permittivity (~3,000), low dielectric loss (<3 %) and dielectric temperature stability (±15 %) in the temperature range of 25–125 °C, indicating this ceramic satisfies the requirement of EIA X7R specifications. Especially for x = 0.2, the variations of Δε/ε100 °C is around ±15 % over a wide temperature range from 100 to 400 °C, suggesting potential usage at elevated temperatures.
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Acknowledgments
This work was supported by Natural Science Foundation of China (Nos. 11364012, 51102058, 11464009, and 50962004), Natural Science Foundation of Guangxi (Nos. 2013GXNSFAA019291, 2014GXNSFAA118326, and 2014GXNSFAA118312), Project of Guangxi Scientific Research and Technical Development (No. 1348020-11), Research start-up funds Doctor of Guilin University of Technology (Nos. 002401003281 and 002401003282).
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Chen, X., Chen, J., Ma, D. et al. Thermally stable BaTiO3–Bi(Zn0.75W0.25)O3 solid solution with high relative permittivity and low dielectric loss. J Mater Sci: Mater Electron 26, 1413–1418 (2015). https://doi.org/10.1007/s10854-014-2555-1
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DOI: https://doi.org/10.1007/s10854-014-2555-1