Influence of aluminum speciation on the stability of aluminosilicate glasses against crystallization

Qiuju Zheng; Morten M. Smedskjaer; Randall E. Youngman; Marcel Potuzak; John Mauro; Yuanzheng Yue

doi:10.1063/1.4739005

Influence of aluminum speciation on the stability of aluminosilicate glasses against crystallization

Qiuju Zheng, Morten M. Smedskjaer, Randall E. Youngman, Marcel Potuzak, John Mauro, Yuanzheng Yue

Materials Science and Engineering

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32 Scopus citations

Abstract

In this letter, we investigate the correlation between glass microstructure and glass stability (GS) in soda lime aluminosilicates. We find a loss of GS (i.e., an onset of crystallization) in the glasses above a critical concentration of Al ₂O ₃ when heating at the standard rate of 20 K/min. This loss in GS may be attributed to formation of five-fold coordinated Al species when [Al ₂O ₃]/[Na ₂O] > 1. The primary crystalline phase is identified as nepheline, in which Al exists in four-fold coordination. This implies that the five-fold coordinated Al is energetically less stable compared to Al in a tetrahedral environment.

Original language	English (US)
Article number	041906
Journal	Applied Physics Letters
Volume	101
Issue number	4
DOIs	https://doi.org/10.1063/1.4739005
State	Published - Jul 23 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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abstract = "In this letter, we investigate the correlation between glass microstructure and glass stability (GS) in soda lime aluminosilicates. We find a loss of GS (i.e., an onset of crystallization) in the glasses above a critical concentration of Al 2O 3 when heating at the standard rate of 20 K/min. This loss in GS may be attributed to formation of five-fold coordinated Al species when [Al 2O 3]/[Na 2O] > 1. The primary crystalline phase is identified as nepheline, in which Al exists in four-fold coordination. This implies that the five-fold coordinated Al is energetically less stable compared to Al in a tetrahedral environment.",

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AU - Zheng, Qiuju

AU - Smedskjaer, Morten M.

AU - Youngman, Randall E.

AU - Potuzak, Marcel

AU - Mauro, John

AU - Yue, Yuanzheng

PY - 2012/7/23

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N2 - In this letter, we investigate the correlation between glass microstructure and glass stability (GS) in soda lime aluminosilicates. We find a loss of GS (i.e., an onset of crystallization) in the glasses above a critical concentration of Al 2O 3 when heating at the standard rate of 20 K/min. This loss in GS may be attributed to formation of five-fold coordinated Al species when [Al 2O 3]/[Na 2O] > 1. The primary crystalline phase is identified as nepheline, in which Al exists in four-fold coordination. This implies that the five-fold coordinated Al is energetically less stable compared to Al in a tetrahedral environment.

AB - In this letter, we investigate the correlation between glass microstructure and glass stability (GS) in soda lime aluminosilicates. We find a loss of GS (i.e., an onset of crystallization) in the glasses above a critical concentration of Al 2O 3 when heating at the standard rate of 20 K/min. This loss in GS may be attributed to formation of five-fold coordinated Al species when [Al 2O 3]/[Na 2O] > 1. The primary crystalline phase is identified as nepheline, in which Al exists in four-fold coordination. This implies that the five-fold coordinated Al is energetically less stable compared to Al in a tetrahedral environment.

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Influence of aluminum speciation on the stability of aluminosilicate glasses against crystallization

Abstract

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