Sodium and Potassium Mixed Effects on the Viscoelastic Behavior of Silicate Glasses.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-03-18 DOI:10.3390/ma18061337

Fucheng Wu, Yonggang Huang, Haizheng Tao, Peng Jiao, Ziyang Xiao, Jinsheng Jia

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Abstract

This study investigated the viscoelastic behavior and structural evolution of silicate glasses with the molar composition 70SiO₂·(30 - x) Na₂O·xK₂O, where the molar ratio r = x/30 varied between 0, 0.25, 0.5, and 0.75. A notable "V"-shaped trend in relaxation activation energy (ΔH_Gt) was observed, with the energy reaching a minimum of 163.14 kJ/mol at r = 0.5. This trend exhibited a synergistic mixed alkali effect that significantly affected the viscoelastic properties of the glass. Raman spectroscopy analysis revealed dynamic structural reorganization within the [SiO₄] network, transitioning from Q⁴ to Q³ for r < 0.5 and reverting to Q⁴ for r > 0.5 as the K₂O content increased. These structural transformations provide atomic-scale evidence for the observed viscoelastic behavior. The findings offer critical insights into the mixed alkali effect on viscoelasticity, establishing a theoretical foundation for optimizing clad materials in optical fiber imaging arrays.

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钠钾混合对硅酸盐玻璃粘弹性的影响。

本文研究了摩尔组成为70SiO2·（30 - x） Na2O·xK2O的硅酸盐玻璃的粘弹性行为和结构演变，其中摩尔比r = x/30在0、0.25、0.5和0.75之间变化。弛豫活化能（ΔHGt）呈显著的“V”型变化趋势，在r = 0.5时达到最小值163.14 kJ/mol。这种趋势表现出协同混合碱效应，显著影响玻璃的粘弹性。拉曼光谱分析显示，随着K2O含量的增加，[SiO4]网络内部的动态结构重组，在r < 0.5时从Q4过渡到Q3，在r > 0.5时又恢复到Q4。这些结构转变为观察到的粘弹性行为提供了原子尺度的证据。该研究结果为研究混合碱对粘弹性的影响提供了重要见解，为优化光纤成像阵列中的包层材料奠定了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.