Abstract
The effect of modification (in the А and В sublattices) on the crystal structure parameters, microstructure, and dielectric and local piezoelectric properties of perovskite ceramics (1 – x)(K0.5Na0.5)NbO3–xLa(Ag0.5Sb0.5)O3 was studied. At increased concentration of the second component, the lattice volume and average grain diameter decreased, and the temperature of the polymorphic transition and Curie temperature lowered. The dielectric and effective piezoelectric properties of the samples were found to depend nonmonotonically on the composition, average grain diameter, and degree of texturing of the ceramics.
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Funding
This study was supported by the Russian Foundation for Basic Research (project nos. 21-53-12005 and 20-32-90117). This work was performed under the government contract of the Ministry of Education and Science of the Russian Federation, topic no. 45.22 (АААА-А18-118012390045-2), project no. 0718-2020-0031; and under the government contract at the Federal Research Center “Crystallography and Photonics,” Russian Academy of Sciences.
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This paper was presented at the Sixth Interdisciplinary Scientific Forum with International Participation “New Materials and Advanced Technologies,” Moscow, November 23–26, 2020, https://n-materials.ru.
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Translated by L. Smolina
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Politova, E.D., Kaleva, G.M., Mosunov, A.V. et al. Synthesis and Properties of Modified Potassium-Sodium Niobate Ceramics. Russ. J. Inorg. Chem. 66, 1257–1263 (2021). https://doi.org/10.1134/S0036023621080234
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DOI: https://doi.org/10.1134/S0036023621080234