The impact of Ta 2 O 5 in multinucleating agents on chemically strengthened MgO–Al 2 O 3 –SiO 2 transparent glass‐ceramics

作者：Guoliang Xu, Mengyong Li, Fu Wang, Qilong Liao, Yuxin Gu, Laibao Liu, Junwei Dong, Jiajia Chen, Guanghua Li, Lisheng Li · 发表于：Journal of the American Ceramic Society · 年份：2025 · DOI：10.1111/jace.20394 · 被引用次数：13 · 研究领域：Glass properties and applications、Recycling and utilization of industrial and municipal waste in materials production、Advanced ceramic materials synthesis

Abstract MgO–Al 2 O 3 –SiO 2 (MAS) glass‐ceramics are significant due to their excellent mechanical properties. However, most of these glass‐ceramics are opaque and lack chemically strengthened capabilities. In this study, chemically strengthened transparent MAS glass‐ceramics were successfully synthesized by employing SnO 2 + ZrO 2 + Ta 2 O 5 as a multinucleating agent. Systematic investigation was conducted using differential scanning calorimetry (DSC), X‐ray diffraction (XRD), transmission electron microscope (TEM), field emission scanning electron microscope (FE‐SEM), Scattered Light Photoelastic Stress Meter (SLP), and Vickers hardness measurements. The results show that Ta 2 O 5 exhibits a good nucleation effect. With the increase of Ta 2 O 5 content from 0 mol% to 0.5 mol%, the exothermic peak temperature of the precipitated crystals decreased from 976.3°C to 937.6°C. The primary crystalline phases precipitated in the MAS system were MgAl₂O₄ (PDF#21‐1152) and ZnAl₂O₄ (PDF#05‐0669), with secondary phases including SnO 2 (PDF#46‐1088), ZrO 2 (PDF#50‐1089), and Ta 2 O 5 (PDF#21‐1198). TEM‐tested interplanar spacing data and electron diffraction ring data further confirmed the presence of these crystalline phases. At 0.5 mol% Ta 2 O 5 content, after crystallization at 920°C, the average grain size was approximately 40.34 nm, with 86.57% transmittance at 550 nm. The Vickers hardness of the parent glass increased from 6.68 GPa to 7.17 GPa after heat treatment at 920°C. Follo...