Effect of substitution of ZrO2 by SnO2 on crystallization and properties of environment-friendly Li2O–Al2O3–SiO2 system (LAS) glass-ceramics. Issue 15 (1st August 2022)

• Record Type: Journal Article
• Authors: Zhang, Jinhao; Huang, Jianghai; Yu, Yuanjie; Zhang, Zaili; Bai, Haitao; Huang, Yongqian
• Is Part Of: Ceramics international. Volume 48:Issue 15(2022)
• Page Start: 21396
• Page End: 21402
• Publication Date: 2022-08-01
• Subjects: Glass ceramics D -- Mechanical properties C -- Optical properties C -- Environment-friendly; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.04.101
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, a transparent and environmentally friendly Li2 O–Al2 O3 –SiO2 (LAS) glass-ceramic was prepared by melt-quenching and two-step heat treatment. The influence of the substitution amount of ZrO2 by SnO2 on the crystallization, microstructure, transparency, and mechanical properties of LAS glass and glass-ceramics was investigated by means of differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Ultraviolet–visible Spectrophotometer, three-point bending strength test, and microhardness test. The results indicate that the main crystalline phase of LAS glass ceramics was a β-quartz solid solution when heat treated at 780 °C for 2 h and 870 °C for 1.5 h. When the substitution amount of ZrO2 –SnO2 increased from 0.4 mol% to 2.5 mol%, the grain size and thermal expansion coefficient of LAS glass-ceramics first decreased and then increased, and the crystallinity first increased and then decreased. When the substitution amount of ZrO2 –SnO2 was 0.8 mol%, the transparency of the LAS glass-ceramics was maximum, the bending strength was 96 MPa, and the Vickers hardness was 10.9 GPa.