Sodium and Potassium Mixed Effects on the Viscoelastic Behavior of Silicate Glasses
This study investigated the viscoelastic behavior and structural evolution of silicate glasses with the molar composition 70SiO<sub>2</sub>·(30 - x) Na<sub>2</sub>O·xK<sub>2</sub>O, where the molar ratio <i>r</i> = <i>x</i>/30 varied between 0, 0.25, 0.5, and 0.75. A notable "V"-shaped trend in relaxation activation energy (Δ<i>H</i><sub>Gt</sub>) was observed, with the energy reaching a minimum of 163.14 kJ/mol at <i>r</i> = 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 [SiO<sub>4</sub>] network, transitioning from Q<sup>4</sup> to Q<sup>3</sup> for <i>r</i> < 0.5 and reverting to Q<sup>4</sup> for <i>r</i> > 0.5 as the K<sub>2</sub>O 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.
Authors
- Yonggang Huang (ORCID: https://orcid.org/0000-0003-0978-8714)
- Haizheng Tao (ORCID: https://orcid.org/0000-0002-5013-837X)
- Jinsheng Jia
- Ziyang Xiao (ORCID: https://orcid.org/0000-0001-5122-0837)
- Peng Jiao (ORCID: https://orcid.org/0009-0006-2687-0591)
- Fuzuo Wu (ORCID: https://orcid.org/0000-0003-4941-2455)
Institutions
- Wuhan University of Technology (CN)
- China Building Materials Academy (CN)
Publication Details
- Journal
- Materials
- Published
- 2025-03-18
- DOI
- https://doi.org/10.3390/ma18061337
- Primary Topic
- Glass properties and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Beijing Association for Science and Technology