In-situ study of the formation of sodium-niobate-silicate glass-ceramics with dielectric spectroscopy

Koroleva Ekaterina; Lipovskii Andrey; Petrunenkova Svetlana; Tagantsev Dmitry; Vakhrushev Sergey

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >In-situ study of the formation of sodium-niobate-silicate glass-ceramics with dielectric spectroscopy

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In-situ study of the formation of sodium-niobate-silicate glass-ceramics with dielectric spectroscopy

机译：用介电光谱形成铌酸钠 - 硅酸钠玻璃陶瓷形成的原位研究

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摘要

The dielectric response and the effect of heat treatment on the properties of a potassium-sodium-niobium-silicate glass with a high content of niobium are studied in wide temperature and frequency ranges. Heat treatment of the glass results in the formation of sodium niobate nanocrystals that leads to a significant decrease in the dielectric losses and an increase in the dielectric constant and the activation energy of the DC conductivity of the medium. It is shown that the crystallization process takes place in two stages - the first is the liquid-liquid glass separation (segregation), and the second is the crystals growth. Based on the classical Johnson-Mehl-Avrami-Kolmogorov theory, it is confirmed that the nanocrystals are anisotropic and that no new nuclei arise during the crystallization. The main contribution to the dielectric response of the initial and heat-treated glasses is made by the low-frequency relaxation process associated with the conductivity (charge polarization).

机译：在较宽的温度和频率范围内，研究了高铌含量钾钠铌硅酸盐玻璃的介电响应和热处理对其性能的影响。玻璃的热处理导致铌酸钠纳米晶体的形成，这导致介质的介电损耗显著降低，介电常数和直流电导率的激活能增加。结果表明，结晶过程分为两个阶段：第一阶段是液-液玻璃分离（偏析），第二阶段是晶体生长。基于经典的Johnson-Mehl-Avrami-Kolmogorov理论，证实了纳米晶体是各向异性的，在结晶过程中没有出现新的晶核。初始和热处理玻璃的介电响应主要由与导电性（电荷极化）相关的低频弛豫过程产生。

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2021年第1期|共7页
作者
Koroleva Ekaterina; Lipovskii Andrey; Petrunenkova Svetlana; Tagantsev Dmitry; Vakhrushev Sergey;
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作者单位

Ioffe Inst 26 Politekh Skaya St Petersburg 194021 Russia;

Alferov Univ 8-3 Khlopina St Petersburg 194021 Russia;

Peter Great St Petersburg Polytech Univ 29 Politekh Skaya St Petersburg 195251 Russia;

Alferov Univ 8-3 Khlopina St Petersburg 194021 Russia;

Ioffe Inst 26 Politekh Skaya St Petersburg 194021 Russia;

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正文语种 eng
中图分类非晶态和类晶态;
关键词
Glass; Crystallization; Sodium niobate; Glass-ceramics; Conductivity; Dielectric function;

机译：玻璃;结晶;铌酸钠;玻璃陶瓷;电导率;电介质功能;

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In-situ study of the formation of sodium-niobate-silicate glass-ceramics with dielectric spectroscopy

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