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

• Published in: Russian Journal of Physical Chemistry A 2023-05, Vol.97 (5), p.965-970
• Main Authors: Kaleva, G. M., Politova, E. D., Mosunov, A. V., Ilina, T. S., Kiselev, D. A.
• Format: Article
• Language: English
• Subjects: Barium titanates; Cations; Chemistry; Chemistry and Materials Science; Crystal structure; Ferroelectric materials; Ferroelectricity; Germanium oxides; Hysteresis loops; Niobates; Perovskite structure; Perovskites; Phase transitions; Physical Chemistry; Piezoelectricity; Polarization; Solid phase synthesis; Spectroscopy; Structure of Matter and Quantum Chemistry; Switching; Unit cell; Zinc oxide
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024423050126

Single-phase ceramic samples with new compositions (1 – x – у )(Na 0.5 Bi 0.5 )TiO 3 – х BaTiO 3 – у (K 0.5 Na 0.5 )NbO 3 ( x = 0.05, у = 0–0.15) modified with ZnO and GeO 2 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.