Influence of Y2O3 substitution for B2O3 on the structure and properties of alkali-free B2O3-Al2O3-SiO2 glasses containing alkaline-earth metal oxides
Influence of Y2O3 substitution for B2O3 on the structure and properties of alkali-free B2O3-Al2O3-SiO2 glasses containing alkaline-earth metal oxides
复制标题
Y2O3取代B2O3对含碱土金属氧化物无碱B2O3-Al2O3-SiO2玻璃结构和性能的影响
DOI：
10.1016/j.physb.2018.10.024
复制
发表时间：
2019-01-15
影响因子：
2.8
通讯作者：
Lu, Anxian
中科院分区：
文献类型：
--
作者：
Liu, Jianlei;Luo, Zhiwei;Lu, Anxian
本工作采用传统的熔体急冷法制备了含碱土金属氧化物的无碱B_2O_3-Al_2O_3-SiO_2玻璃。系统地讨论了Y_2O_3替代B_2O_3对玻璃结构和性能的影响。通过FT-IR光谱研究了不同Y2 O3含量掺杂玻璃的结构变化。研究了玻璃的密度、热膨胀系数、应变点、抗压强度、抗弯强度、维氏硬度、化学稳定性和透光率等相关性能与玻璃结构的关系。红外光谱研究表明，Y_2O_3起到了网络改性剂的作用，破坏了玻璃的网络结构。在玻璃性能方面，随着Y2 O3含量的增加，玻璃的密度和热膨胀系数增加，而化学稳定性和透过率下降。此外，抗压强度和抗弯强度先降低后升高，但Y2 O3的替代对应变点和维氏硬度的影响较小。所设计的每一种玻璃都具有良好的透射率（80%以上），非常高的应变点（接近732 ℃）和优异的化学耐久性。
In this work, alkali-free B2O3-Al2O3-SiO2 glasses containing alkaline-earth metal oxides were prepared by conventional melt-quenching method. Influence of Y2O3 substitution for B2O3 on the structure and properties of the glasses was systematically discussed. The structural variations of the glasses doped with different Y2O3 content were studied by FT-IR spectroscopy. Simultaneously, the relationship between the structure and related properties of the glasses including density, thermal expansion coefficient, strain point, compressive strength, bending strength, Vickers hardness, chemical durability and light transmittance was also investigated. The study on FT-IR spectra shows that Y2O3 acts as a network modifier and destroys the glass network structure. In terms of the properties of the glasses, with the increase of Y2O3 content at the expense of B2O3, the density and thermal expansion coefficient increase, while the chemical durability and transmittance decline. In addition, the compressive strength and bending strength decrease first and then increase, but the replacement of Y2O3 has less effect on the strain point and Vickers hardness. Each of the designed glasses possesses good transmittance (above 80%), very high strain point (near 732 degrees C) and excellent chemical durability.