Structure, microstructure, and functional properties of modified sodium niobate ceramics

被引：0
|
作者：
Politova, E. D. [1 ]
Kaleva, G. M. [1 ]
Mosunov, A. V. [2 ]
Sadovskaya, N. V. [3 ]
Fortalnova, E. A. [4 ]
Shur, V. Ya. [5 ]
Ushakov, A. D. [5 ]
Faizullin, M. Z. [6 ]
机构：
[1] Russian Acad Sci, NN Semenov Fed Res Ctr Chem Phys, Moscow, Russia
[2] Lomonosov Moscow State Univ, Fac Chem, Moscow, Russia
[3] Russian Acad Sci, Inst Crystallog, Fed Res Ctr Crystallog & Photon, Moscow, Russia
[4] RUDN Univ, Peoples Friendship Univ Russia, Moscow, Russia
[5] Ural Fed Univ, Sch Nat Sci & Math, Ekaterinburg, Russia
[6] RAS, Inst Thermal Phys, Ural Branch, Ekaterinburg, Russia
来源：
FERROELECTRICS | 2024年 / 618卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
Sodium niobate; perovskite structure; microstructure; functional properties; LEAD-FREE PIEZOCERAMICS; ELECTROCALORIC RESPONSE; STABILITY;
D O I：
10.1080/00150193.2024.2305582
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ceramic samples of new compositions (1-x)(0.9NaNbO3 - 0.1BaTiO3) - xBaZrO3 (x = 0 divided by 0.05) modified by SiO2 oxide additive were prepared; their phase composition, structure parameters, microstructure, dielectric and ferroelectric properties were studied. Formation of a phase with a perovskite structure with a tetragonal unit cell was established, which volume increased due to partial replacement of A and B cations by Ba2+ and Zr4+ ones with large ionic radii. Decrease in the temperature of ferroelectric phase transitions and corresponding increase in polarization and electrocaloric effect indicates a positive effect of doping on the functional properties of sodium niobate-based ceramics.
引用
收藏
页码：1422 / 1430
页数：9
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