Issue 24, 2017, Issue in Progress

Structure and crystallization behavior of Al containing glasses in the CaO–B2O3–SiO2 system

Abstract

The aim of the present work is to investigate the effects of Al2O3 content on both the structure and crystallization behavior of CaO–B2O3–SiO2 (CBS) glass composition using NMR, FT-IR and DSC. The density experimental results showed that the density (ρ) of glasses decreased linearly with increasing Al2O3 content, while the molar volume (Vm) of the glasses increased linearly. The NMR revealed that the Al occurred in the forms of AlIV, AlV and AlVI units. With the increasing Al2O3 content, the amount of Al species show little change, the relative amount of BIIIa and BIIIs units increases while the BIV units decrease, and the Q4 structural units increases clearly but the Q3 decreases. Further, crystallization peaks of CBS glasses shift to higher temperatures, indicating that Al2O3 addition can suppress crystallization of CBS glasses.

Graphical abstract: Structure and crystallization behavior of Al containing glasses in the CaO–B2O3–SiO2 system

Article information

Article type
Paper
Submitted
04 Feb 2017
Accepted
27 Feb 2017
First published
06 Mar 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 14709-14715

Structure and crystallization behavior of Al containing glasses in the CaO–B2O3–SiO2 system

J. Han, Y. Lai, Y. Xiang, S. Wu, Y. Zeng, H. Yang, Y. Mao and Y. Yang, RSC Adv., 2017, 7, 14709 DOI: 10.1039/C7RA01427A

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