Abstract

MgO–Al₂O₃–SiO₂ (MAS) glass has widespread applications due to the excellent chemical stability and mechanical strength. Accommodation of macroscopic properties requires a systematic investigation of the microstructure of glass caused by compositional adjustment. In this work, effects of progressive replacement of MgO by Al₂O₃ or SiO₂ on glass structure and Vickers hardness were investigated. With the replacement of MgO by Al₂O₃ or SiO₂, the glass network was strengthened, as a result, the glass transition temperature was increased and the crystallization tendency was weakened. The degree of structural changes caused by substitution of SiO₂ for MgO is more significant than that of Al₂O₃ substitute for MgO. The strengthened glass network promotes the increase of Vickers hardness, and the coefficient of thermal expansion can be tailored in a large range. The results show that MAS glass maybe useful in the field of glass substrates for TFT–LCDs.

中文翻译：

---

成分对MgO-Al2O3-SiO2三元玻璃结构和性能的影响

摘要

MgO–Al ₂ O ₃ –SiO ₂ (MAS)玻璃由于具有优异的化学稳定性和机械强度而具有广泛的应用。宏观性能的调节需要对成分调整引起的玻璃微观结构进行系统研究。在这项工作中，研究了Al ₂ O ₃或SiO ₂逐步取代MgO对玻璃结构和维氏硬度的影响。_{Al 2} O ₃或SiO ₂取代MgO后，玻璃网络得到强化，玻璃化转变温度升高，结晶倾向减弱。_{SiO 2}代替MgO引起的结构变化程度比Al ₂ O ₃代替MgO引起的结构变化程度更显着。强化玻璃网络促进维氏硬度增加，热膨胀系数可在大范围内定制。结果表明，MAS 玻璃可能在 TFT-LCD 玻璃基板领域有用。