Effect of Na+ Ions on the Mechanical Properties of Lithium Aluminosilicate Glass

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

Glass Physics and Chemistry Pub Date : 2024-03-08 DOI:10.1134/s108765962360076x

Yanhang Wang, Lei Liu, Min Liu, Xianzi Li, Zhenyuan Zhang, Jiayu Liu, Xianying Shao, Yuebo Hu

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Abstract

A series of lithium aluminosilicate glasses with the composition of 70SiO₂–10Al₂O₃–5K₂O–15Li₂O–xNaCl (x = 0.5, 1.5, 2.5, 3.5 and 4.5 wt %) were prepared by the melt-quenching method. The effect of NaCl addition on mechanical properties was assessed. It was found that both the glass density and the hardness decreased with increasing content of NaCl from 0.5 to 3.5 wt %. Interestingly, Vickers hardness of the glass increased when NaCl content increased by 4.5 wt %. Raman test results show that NBO/T in the glass increases with NaCl, that is, the decrease of the degree of polymerization of the glass network due to the breaking of Si–O–Si bonds. Since the Si–O–Si covalent bond is the strongest bond in the silicate glass, the glass structure tends to be depolymerized, and the density and Vickers hardness decrease. Thus, we attribute the hardness increasing at 4.5 wt % NaCl addition to the fact that Na⁺ enters the network pores acting as network modifier.

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Na+ 离子对硅酸铝锂玻璃机械特性的影响

摘要采用熔淬法制备了一系列锂铝硅酸盐玻璃，其组成为 70SiO2-10Al2O3-5K2O-15Li2O-xNaCl（x = 0.5、1.5、2.5、3.5 和 4.5 wt %）。评估了添加氯化钠对机械性能的影响。结果发现，玻璃密度和硬度都随着氯化钠含量从 0.5 wt % 到 3.5 wt % 的增加而降低。有趣的是，当 NaCl 含量增加到 4.5 wt % 时，玻璃的维氏硬度增加了。拉曼测试结果表明，玻璃中的 NBO/T 随 NaCl 的增加而增加，即由于 Si-O-Si 键的断裂，玻璃网络的聚合度降低。由于 Si-O-Si 共价键是硅酸盐玻璃中最强的键，因此玻璃结构趋于解聚，密度和维氏硬度也随之降低。因此，我们将氯化钠添加量为 4.5 wt % 时硬度增加的原因归结为 Na+ 进入网络孔隙起到了网络改性剂的作用。

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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.