Preparation, Microstructure, and Dielectric and Ferroelectric Properties of Modified (1-x)(K0.5Na0.5)NbO3•xLiNbO3 Ceramics

被引：0
作者：
Politova, E. D. [1 ]
Kaleva, G. M. [1 ]
Mosunov, A. V. [2 ]
Stefanovich, S. Yu. [2 ]
Klyukina, E. V. [3 ]
Bespalova, E. A. [3 ]
Lopatin, A. V. [3 ]
Metal'nikov, N. M. [3 ]
Saprykin, M. E. [3 ]
Loginov, A. B. [2 ]
Orazov, I. V. [4 ]
Loginov, B. A. [4 ]
机构：
[1] Russian Acad Sci, Semenov Fed Res Ctr Chem Phys, Moscow 119991, Russia
[2] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
[3] Sirius Educ Ctr, Soci 354349, Russia
[4] Natl Res Univ, Moscow Inst Elect Technol, Zelenograd 124498, Moscow, Russia
来源：
INORGANIC MATERIALS | 2022年 / 58卷 / 12期
基金：
俄罗斯基础研究基金会;
关键词：
potassium sodium niobate; ceramics; perovskite structure; microstructure; ferroelectric; dielectric properties;
D O I：
10.1134/S0020168522110139
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Single-phase (1 - x)(K0.5Na0.5)NbO3 center dot xLiNbO(3) (KNN-LN) perovskite-structure ceramic materials with x = 0-0.10 modified with CuO and KCl additions have been prepared by solid-state synthesis, and their phase composition, structure, microstructure, and dielectric and ferroelectric properties have been studied. Increasing the percentage of lithium niobate has been shown to increase their Curie temperature and lower the temperature of their polymorphic phase transition, which is accompanied by a decrease in perovskite cell parameters, in accord with the ionic radii of the A-site cations. The x = 0.2 material has been found to have an increased room-temperature dielectric permittivity, which correlates with the observed increase in spontaneous polarization, as evidenced by laser radiation second harmonic generation intensity measurements.
引用
收藏
页码：1328 / 1334
页数：7
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