Enhancement of high-alumina glass and glass-ceramics through dual modification of Zn 2+ and its mechanism

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 12; no. 43; pp. 29763 - 29775
• Main Authors: Ren, Beibei, Liu, Yaxin, Yu, Jiani, Wang, Ting, Jiang, Hong, Dong, Chuang, Xiong, Chunrong, Wang, Na, Huang, Xin, Hao, Hongxun
• Format: Journal Article
• Language: English
• Published: 05.11.2024
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/D4TA05150E

In this work, high-alumina glass and glass-ceramics were enhanced through dual modification with Zn 2+ and the effects of Zn 2+ on the crystallization behavior, structural evolution and properties of high-alumina glass were investigated by a combination of experiments and MD simulation. Firstly, the effect of Zn 2+ on the glass network of high-alumina glass was explored using XRD, TEM, SAXS, IR and MD simulation. The results indicate that Zn 2+ possesses a dual role of depolymerization and stabilization during the continuous introduction of Zn 2+ . Secondly, the effects of Zn 2+ on the crystallization behavior and structural evolution of high-alumina glass-ceramics were explored using XRD, TEM, SEM, Raman and XPS. It was found that a small amount of Zn 2+ would promote the precipitation of nanocrystalline ZnAl 2 O 4 and further enhance the mechanical properties of glass-ceramics. However, a large amount of Zn 2+ would lead to the precipitation of the impurity phase SiO 2 , which could adversely affect the mechanical properties. Finally, the effects of Zn 2+ on the properties of high-alumina glass and glass-ceramics were analyzed. The results demonstrated that the mechanical properties and transmittance of high-alumina glass and glass-ceramics can be significantly improved by adding an appropriate amount of Zn 2+ . Therefore, an effective method based on Zn 2+ to modulate the properties of high-alumina glass and glass-ceramics has been successfully developed.