NMR study of structural changes of alkali borosilicate glasses with heat treatment

A phenomenon of the temperature dependent structural change of xNa2O·(50−x)B2O3·50SiO2 glasses was observed by use of 11B and 29Si NMR and Raman spectroscopies. The 11B NMR measurement showed that a small fraction of BO4 units transformed into BO3 units below x=17 (Na2O/B2O3<0.51) after the glass...

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Bibliographic Details
Published inJournal of non-crystalline solids Vol. 345-346; no. Complete; pp. 104 - 107
Main Authors Chen, D., Miyoshi, H., Masui, H., Akai, T., Yazawa, T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2004
Subjects
78.30.Ly
G205
81.40.G
61.43.F
N220
B160
R110
61.18.F
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Summary:A phenomenon of the temperature dependent structural change of xNa2O·(50−x)B2O3·50SiO2 glasses was observed by use of 11B and 29Si NMR and Raman spectroscopies. The 11B NMR measurement showed that a small fraction of BO4 units transformed into BO3 units below x=17 (Na2O/B2O3<0.51) after the glasses were heat treated at 600°C for 50h; an opposite transformation occurred above x=18; namely BO3 units converted into BO4 units. Raman and 29Si MAS–NMR spectra also showed the effect of the heat treatment on the structure of the glass.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2004.08.064