SYNTHESIS, MICROSTRUCTURE AND PROPERTIES OF CERAMICS (K0.5Na0.5) NBO3–SrZrO3 DOPED WITH LITHIUM FOTORIDE

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Abstract

Single-phase ceramic samples of new compositions (1-x)(K0.5Na0.5) NbO3 – xSrZrO3 (x = 0–0.15), modified by the addition of 2 wt. % lithium fluoride LiF, were obtained by solid-phase synthesis and their crystal structure, microstructure, dielectric and nonlinear optical properties were studied. The formation of a phase with perovskite structure with pseudocubic unit cell in the modified samples was found. The formation of a finer-grained microstructure with increasing SrZrO3 content has been revealed. Segnetoelectric phase transitions have been confirmed by dielectric spectroscopy. Decrease in the temperature of phase transitions and weakening of nonlinear optical properties as the content of strontium zirconate in the samples increases were found.

About the authors

G. M. Kaleva

N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: galina_kaleva@mail.ru
119991, Москва, Россия

E. D. Politova

N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

119991, Москва, Россия

A. V. Mosunov

Lomonosov Moscow State University

119991, Москва, Россия

N. V. Sadovskaya

Federal State Budgetary Institution “National Research Center “Kurchatov Institute”

119333, Москва, Россия

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