Mixed alkali effect on chemical durability and mechanical properties of a borosilicate glass series

被引：0

作者：

You, Pengcheng ^{[1
]}

Shen, Yang ^{[1
]}

Yang, Rui ^{[2
]}

Jiang, Hong ^{[3
]}

Zhang, Yanfei ^{[1
]}

Zheng, Qiuju ^{[1
]}

Yue, Yuanzheng ^{[4
]}

机构：

[1] Qilu Univ Technol, Sch Mat Sci & Engn, Jinan 250353, Peoples R China

[2] Shandong Inst Med Device & Pharmaceut Packaging In, Jinan 250101, Peoples R China

[3] Hainan Univ, Dept Mat & Chem Engn, Haikou 570228, Peoples R China

[4] Aalborg Univ, Dept Chem & Biosci, DK-9220 Aalborg, Denmark

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2025年 / 666卷

基金：

中国国家自然科学基金;

关键词：

Borosilicate glass; Mixed alkali effect; Structure; Chemical durability; Structure-property relationship; SILICATE; TERM;

D O I：

10.1016/j.jnoncrysol.2025.123669

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Understanding the mixed alkali effect (MAE) on the chemical durability of glass is crucial for optimizing the composition of nuclear waste immobilization glasses. In this work, we investigated the impact of the substitution of K2O for Na2O on structure, chemical durability, and some physical properties of a borosilicate glass series. We found that the fraction of four-coordinated boron (N4) exhibited a drastic decrease when the molar ratio of potassium ions surpassed a certain threshold. Beyond this threshold, the N4 fraction remained constant. The structure analyses showed that the additional potassium ions were inclined to break the ring structure, leading to the formation of chain structure. Furthermore, the leaching of the different cations took place through synergistic mechanisms involving {Na&B}, {K&B} and {Al&Ca} pairs. Both the coefficient of thermal expansion (alpha) and the hardness (H) manifested a pronounced mixed alkali effect. This work provides insights into the correlation between the mixed alkali effect and the physical and chemical properties.

引用

页数：8

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