Network connectivity and properties of non-alkali aluminoborosilicate glasses

被引：41

作者：

Xie, Jun ^{[1
]}

Tang, Herui ^{[1
]}

Wang, Jing ^{[1
]}

Wu, Mengming ^{[1
]}

Han, Jianjun ^{[1
]}

Liu, Chao ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2018年 / 481卷

关键词：

Aluminoborosilicate glasses; Network structure; NMR; Properties; HIGH-RESOLUTION B-11; NUCLEAR-MAGNETIC-RESONANCE; BOROSILICATE GLASSES; ALUMINOSILICATE GLASSES; BORATE GLASSES; PHYSICOCHEMICAL PROPERTIES; OXIDE GLASSES; MAS-NMR; AL-27; SI-29;

D O I：

10.1016/j.jnoncrysol.2017.11.023

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of alkaline earth metal oxides (RO) concentrations on the network structure and properties of non-alkali aluminoborosilicate glasses were studied. With the increasing of RO concentrations from 10 to 20 mol%, the number of Q(4) units decreased, while the number of Q(3) units increased. The [AlO4] units always pre-dominated in Al groups, and the fraction of [BO4] among B groups increased from 2% to 10%. Meantime, the value of NBO/T increased from 0.48 to 0.70, indicating the weak network connectivity. The depolymerization of T-O-T network resulted in higher coefficient of thermal expansion, lower temperature of transition point, weaker durability in HF acid. While, the increasing in R2+ cations and [BO4] units led to the higher elastic modulus of glasses. The increasing in RO also enhanced the density, dielectric constant and durability in NaOH solution of glasses.

引用

页码：403 / 408

页数：6

共 38 条

[1] Structural role of RO and Al2O3 in borate glasses using an ultrasonic technique [J].