NDLI: Structure of alkali borosilicate glasses and melts according to Raman spectroscopy data

Content Provider	Springer Nature Link
Author	Osipov, A. A. Osipova, L. M. Eremyashev, V. E.
Copyright Year	2013
Abstract	Using the technique of high-temperature Raman scattering spectroscopy, we studied the structure of glasses and melts of the systems Na2O-B2O3-SiO2, K2O-B2O3-SiO2, and Cs2O-B2O3-SiO2 with the relations $${{X_{M_2 O} } \mathord{\left/ {\vphantom {{X_{M_2 O} } X}} \right. -} X}_{B_2 O_3 } = 1$$ (M = Na, K, Cs) and $${{X_{SiO_2 } } \mathord{\left/ {\vphantom {{X_{SiO_2 } } X}} \right. -} X}_{B_2 O_3 } = 3$$ and 4/3. Based on the analysis of the registered spectra, we have shown that, at a high content of SiO2, the disordered network of glasses is composed of the Q 4, Q 3, [BO4/2]− tetrahedrons and BO3/2 triangles. When the content of SiO2 reduces, asymmetric borate triangles BØ2/2O− are formed in the structure in addition. A substantial part of borate tetrahedrons are included into the content of mixed borosilicate rings composed of two silicon-oxygen and two boron-oxygen tetrahedrons. The amount of borate structural units joined into purely borate superstructural groups increases with a decrease of the silicon oxide content, depends on the alkali kation type, and grows in the direction from Cs to Na. An increase in the temperature causes a decrease of various types of rings and growth of the concentration of asymmetric triangles. Both in glasses and melts, the fraction of the BO2/2O− triangles depends on the alkali cation type and increases in the succession Cs → K → Na. The results obtained present the basis to suggest that there is some differentiation in the mechanisms of structural reconstruction of the glasses under study by their heating depending on the modifying oxide.
Starting Page	105
Ending Page	112
Page Count	8
File Format	PDF
ISSN	10876596
Journal	Glass Physics and Chemistry
Volume Number	39
Issue Number	2
e-ISSN	1608313X
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2013-04-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	spectroscopy structure alkali borosilicate glasses alkali borosilicate melts Ceramics, Glass, Composites, Natural Methods Characterization and Evaluation of Materials Materials Science Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Condensed Matter Physics

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