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Effect of B2O3 substitution for Al2O3 on the structure and properties of calcium aluminosilicate glass

Calcium aluminosilicate (CaO-Al 2 O 3 -SiO 2 , CAS) glass, with varying B 2 O 3 to Al 2 O 3 substitutions, was prepared using the melting method. The network structure of this CAS glass was analyzed through Raman spectroscopy and nuclear magnetic resonance spectroscopy. The results showed as the B 2...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2024-12, Vol.35 (35), p.2220
Main Authors: Qin, Xinjie, Wei, Zecong, Fan, Zhenhua, Xiong, Dehua, Wang, Yingxin, Teng, Zhou, Zhang, Jihong, Xie, Jun
Format: Article
Language:English
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Summary:Calcium aluminosilicate (CaO-Al 2 O 3 -SiO 2 , CAS) glass, with varying B 2 O 3 to Al 2 O 3 substitutions, was prepared using the melting method. The network structure of this CAS glass was analyzed through Raman spectroscopy and nuclear magnetic resonance spectroscopy. The results showed as the B 2 O 3 to Al 2 O 3 substitution increased, the proportion of [BO 4 ] gradually decreased from 57.2 to 41.6%, while the proportion of [BO 3 ] increased from 42.8 to 58.4%. The primary form of Al 3+ mainly exists in the glass network structure is [AlO 4 ]. The Q n group is dominated by Q 2 (25.6 ~ 35.0%) units and Q 3 (51.8 ~ 65.5%) units. As the B 2 O 3 substitution for Al 2 O 3 increased, there was a gradual decrease in Q 1 and Q 2 units, and a corresponding increase in Q 3 units and Q 4 units, leading to an increase in the degree of polymerization of glass network structure. However, the substitution also reduced the stability of the glass network structure. While the replacement of Al 2 O 3 by B 2 O 3 diminished the hardness, bending strength, expansion softening temperature and other properties of the glass, it significantly reduced the viscous activation energy, melting temperature, and forming temperature of the glass. These changes have significant implications for practical industrial production.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-024-13982-7