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Journal of Materials Science
Published in: Journal of Materials Science 11/2009

01-06-2009

Optical properties and structure of R2O–Ga2O3–SiO2 and RO–Ga2O3–SiO2 glasses

Author: H. Doweidar

Published in: Journal of Materials Science | Issue 11/2009

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Abstract

Refractive index and molar refraction of Li2O–, Na2O–, CaO–, and BaO–Ga2O3–SiO2 glasses have been used to test the validity of a structural model of silicate glasses containing Ga2O3 glasses. Ga2O3 enters these types of glass in a similar manner as Al2O3. It is assumed that, for (SiO2/Ga2O3) >1 and (Ga2O3/R2O) ≤1, Ga2O3 associates primarily with modifier oxides to form GaO4 units. The rest of modifier oxide forms silicate units with non-bridging oxygen ions. Silicate structural units have the same factors as found for binary alkali- and alkaline earth silicate glasses. Differences between experimental and model values suggest another structure for (Ga2O3/SiO2) ≥1.
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Metadata
Title
Optical properties and structure of R2O–Ga2O3–SiO2 and RO–Ga2O3–SiO2 glasses
Author
H. Doweidar
Publication date
01-06-2009
Publisher
Springer US
Published in
Journal of Materials Science / Issue 11/2009
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-009-3383-1

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