Compositional Effect on the Structure and Properties of MgO–Al2O3–SiO2 Ternary Glasses

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS

Glass Physics and Chemistry Pub Date : 2023-12-27 DOI:10.1134/S1087659623600242

Yadong Lu, Jun Xie, Yunlan Guo, Chao Liu

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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.

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成分对氧化镁-Al2O3-二氧化硅三元玻璃结构和性质的影响

摘要 MgO-Al2O3-SiO2 (MAS) 玻璃具有优异的化学稳定性和机械强度，因而应用广泛。要适应其宏观特性，就必须系统地研究成分调整对玻璃微观结构的影响。在这项工作中，研究了 Al2O3 或 SiO2 逐步取代 MgO 对玻璃结构和维氏硬度的影响。随着 Al2O3 或 SiO2 对 MgO 的取代，玻璃网络得到加强，因此玻璃化转变温度升高，结晶趋势减弱。与 Al2O3 替代 MgO 相比，SiO2 替代 MgO 所引起的结构变化程度更为显著。强化的玻璃网络促进了维氏硬度的提高，热膨胀系数可在很大范围内进行调整。研究结果表明，MAS 玻璃可能在 TFT-LCD 玻璃基板领域大有用武之地。

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来源期刊

Glass Physics and Chemistry 工程技术-材料科学：硅酸盐

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass Physics and Chemistry presents results of research on the inorganic and physical chemistry of glass, ceramics, nanoparticles, nanocomposites, and high-temperature oxides and coatings. The journal welcomes manuscripts from all countries in the English or Russian language.