Structure and dielectric properties of (1-x)Na_0.5Bi_0.5TiO_3-xNa_0.5K_0.5NbO₃ ceramics

IF 2.1 3区物理与天体物理 Q3 PHYSICS, APPLIED Journal of Advanced Dielectrics Pub Date : 2023-11-04 DOI:10.1142/s2010135x23500236

E. V. Glazunova, L. A. Shilkina, A. S. Chekhova, A. V. Nazarenko, I. A. Verbenko, L. A. Reznichenko

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Abstract

The solid solutions of the (1-x)Na[Formula: see text]Bi[Formula: see text]TiO 3 -xNa[Formula: see text]K[Formula: see text]NbO 3 system were produced by the conventional ceramic technology using mechanical activation of the synthesized product. It was found that in the (1-x)Na[Formula: see text]Bi[Formula: see text]TiO 3 -xNa[Formula: see text]K[Formula: see text]NbO 3 system at room temperature, a number of morphotropic phase transitions occur: rhombohedral → cubic → tetragonal → monoclinic phases. The introduction of a small amount of Na[Formula: see text]K[Formula: see text]NbO 3 leads to an increase in the temperature stability of the dielectric properties of ceramics. A change in the relaxor properties of the solid solutions of the (1-x)Na[Formula: see text]Bi[Formula: see text]TiO 3 -xNa[Formula: see text]K[Formula: see text]NbO 3 system was shown. The increase in energy density and energy efficiency was found at additive 10[Formula: see text]mol.% of Na[Formula: see text]K[Formula: see text]NbO 3 .

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(1-x)Na0.5Bi0.5TiO3-xNa0.5K0.5NbO3陶瓷的结构和介电性能

采用常规陶瓷工艺对合成产物进行机械活化，制备了(1-x)Na[公式:见文]Bi[公式:见文]TiO 3 -xNa[公式:见文]K[公式:见文]nbo3体系的固溶体。结果表明，室温下(1-x)Na[公式:见文]Bi[公式:见文]tio3 -xNa[公式:见文]K[公式:见文]nbo3体系中发生了一系列的相变:菱形→立方→四方→单斜相。引入少量的Na[公式:见文]K[公式:见文]nbo3导致陶瓷介电性能的温度稳定性提高。研究了(1-x)Na[公式:见文]Bi[公式:见文]TiO 3 -xNa[公式:见文]K[公式:见文]nbo3体系固溶体弛豫量性质的变化。当添加量为10 mol时，能量密度和能量效率均有增加。%的Na[公式:见文]K[公式:见文]NbO 3。

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来源期刊

Journal of Advanced Dielectrics PHYSICS, APPLIED-

CiteScore

3.80

自引率

6.50%

发文量

审稿时长

18 weeks

期刊介绍： The Journal of Advanced Dielectrics is an international peer-reviewed journal for original contributions on the understanding and applications of dielectrics in modern electronic devices and systems. The journal seeks to provide an interdisciplinary forum for the rapid communication of novel research of high quality in, but not limited to, the following topics: Fundamentals of dielectrics (ab initio or first-principles calculations, density functional theory, phenomenological approaches). Polarization and related phenomena (spontaneous polarization, domain structure, polarization reversal). Dielectric relaxation (universal relaxation law, relaxor ferroelectrics, giant permittivity, flexoelectric effect). Ferroelectric materials and devices (single crystals and ceramics). Thin/thick films and devices (ferroelectric memory devices, capacitors). Piezoelectric materials and applications (lead-based piezo-ceramics and crystals, lead-free piezoelectrics). Pyroelectric materials and devices Multiferroics (single phase multiferroics, composite ferromagnetic ferroelectric materials). Electrooptic and photonic materials. Energy harvesting and storage materials (polymer, composite, super-capacitor). Phase transitions and structural characterizations. Microwave and milimeterwave dielectrics. Nanostructure, size effects and characterizations. Engineering dielectrics for high voltage applications (insulation, electrical breakdown). Modeling (microstructure evolution and microstructure-property relationships, multiscale modeling of dielectrics).