Peculiarities of Modified Ceramics (Na0.5Bi0.5)TiO3–BaTiO3–(K0.5Na0.5)NbO3

G. M. Kaleva; Калева Г. М.; E. D. Politova; Политова Е. Д.; A. V. Mosunov; Мосунов А. В.; T. S. Ilina; Ильина Т. С.; D. A. Kiselev; Киселев Д. А.

doi:10.31857/S0044453723050126

Peculiarities of Modified Ceramics (Na0.5Bi0.5)TiO3–BaTiO3–(K0.5Na0.5)NbO3

Autores: Kaleva G.¹, Politova E.¹, Mosunov A.², Ilina T.³, Kiselev D.³
Afiliações:
1. Federal Research Center Semenov Institute of Chemical Physics, Russian Academy of Sciences
2. Moscow State University
3. National University of Science and Technology MISiS
Edição: Volume 97, Nº 5 (2023)
Páginas: 712-717
Seção: СТРОЕНИЕ ВЕЩЕСТВА И КВАНТОВАЯ ХИМИЯ
URL: https://journals.rcsi.science/0044-4537/article/view/136600
DOI: https://doi.org/10.31857/S0044453723050126
EDN: https://elibrary.ru/MRAZWZ
ID: 136600

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Resumo

Single-phase ceramic samples with new compositions (1 – x – у)(Na0.5Bi0.5)TiO3–хBaTiO3–у(K0.5Na0.5)NbO3 (x = 0.05, у = 0–0.15) modified with ZnO and GeO2 additions were obtained by solid-phase synthesis. Their crystal structure, microstructure, and dielectric and local piezoelectric properties were studied. A phase with a perovskite structure with a pseudocubic unit cell was found to form in all of the synthesized samples; it was shown that the unit cell volume increased as a result of the partial replacement of base cations by complex additive cations. The ferroelectric phase transitions were confirmed by dielectric spectroscopy. Residual piezoelectric hysteresis loops were obtained for the synthesized samples in the polarization switching spectroscopy mode, which confirmed the switching of ferroelectric polarization.

Palavras-chave

ceramics, perovskite structure, microstructure, dielectric properties

Bibliografia

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