Abstract—
We have studied the crystal structure and dielectric and local piezoelectric properties of (Na0.5Bi0.5)(Ti1–xMnx)O3 (x = 0–0.1) modified sodium bismuth titanate-based ceramics and observed the formation of a pseudocubic phase with the perovskite structure. Its unit-cell volume first decreases and then, for x ≥ 0.05, increases. The ceramics undergo phase transitions, which show up as anomalies in their dielectric permittivity near ~450 K and peaks at a Curie temperature of ~600 K. As x increases to 0.04, their Curie temperature decreases by 40 K. The phase transitions near 450 K exhibit well-defined relaxor behavior due to the presence of polar regions in the nonpolar matrix. The samples with x < 0.05 have been shown to have an increased room-temperature dielectric permittivity, which correlates with the increased effective piezoelectric coefficient, suggesting that doping with manganese has an advantageous effect on the functional properties of sodium bismuth titanate ceramics.
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14 January 2022
An Erratum to this paper has been published: https://doi.org/10.1134/S0020168521120165
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Funding
This work was supported by the Russian Foundation for Basic Research (project no. 21-53-12005) and the Russian Federation Ministry of Science and Higher Education (state research targets for the Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences (theme no. 45.22, state registration no. AAAA-A18-118012390045-2, project no. 0718-2020-0031) and the Crystallography and Photonics Federal Scientific Research Center, Russian Academy of Sciences).
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Politova, E.D., Kaleva, G.M., Bel’kova, D.A. et al. Dielectric and Piezoelectric Properties of (Na0.5Bi0.5)(Ti1–xMnx)O3 (x = 0–0.1) Modified Ceramics. Inorg Mater 57, 942–949 (2021). https://doi.org/10.1134/S0020168521090120
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DOI: https://doi.org/10.1134/S0020168521090120