Seven magnesium- containing aluminoborosilicate glasses, with three to five oxides, have been studied through comprehensive multinuclear solid- state NMR ( 11 B, 27 Al, 29 Si, 23 Na, 17 O, and 25 Mg) and Raman spectroscopy. The progressive addition of cati- ons and the substitution of sodium and calcium by magnesium illuminate the impact of magnesium on the glass structure. The proportion of tri- coordinated boron drastically increased with magnesium addition, demonstrating the poor charge- compensating capabilities of magnesium in tetrahedral boron units. Oxygen- 17 NMR showed the formation of mixing sites containing both Na and Mg near nonbridging oxygen sites. Furthermore, a high magnesium content appears to result in the formation of two subnetworks (boron and silicon rich) with different polymerization degrees as well as to promote the formation of high- coordination aluminum sites (Al[V] and Al[VI]). Finally, magnesium coordination ranging from 4 to 6, with a mean value shifting from 5 to 6 along the series, suggests that magnesium might endorse an intermediate role in these glasses.

Impact of magnesium on the structure of aluminoborosilicate glasses: A solid‐state NMR and Raman spectroscopy study / Bisbrouck, Nicolas; Bertani, Marco; Angeli, Frédéric; Charpentier, Thibault; Ligny, Dominique; Delaye, Jean‐marc; Gin, Stéphane; Micoulaut, Matthieu. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - 104:9(2021), pp. 4518-4536. [10.1111/jace.17876]

Impact of magnesium on the structure of aluminoborosilicate glasses: A solid‐state NMR and Raman spectroscopy study

Bertani, Marco;
2021

Abstract

Seven magnesium- containing aluminoborosilicate glasses, with three to five oxides, have been studied through comprehensive multinuclear solid- state NMR ( 11 B, 27 Al, 29 Si, 23 Na, 17 O, and 25 Mg) and Raman spectroscopy. The progressive addition of cati- ons and the substitution of sodium and calcium by magnesium illuminate the impact of magnesium on the glass structure. The proportion of tri- coordinated boron drastically increased with magnesium addition, demonstrating the poor charge- compensating capabilities of magnesium in tetrahedral boron units. Oxygen- 17 NMR showed the formation of mixing sites containing both Na and Mg near nonbridging oxygen sites. Furthermore, a high magnesium content appears to result in the formation of two subnetworks (boron and silicon rich) with different polymerization degrees as well as to promote the formation of high- coordination aluminum sites (Al[V] and Al[VI]). Finally, magnesium coordination ranging from 4 to 6, with a mean value shifting from 5 to 6 along the series, suggests that magnesium might endorse an intermediate role in these glasses.
2021
24-apr-2021
104
9
4518
4536
Impact of magnesium on the structure of aluminoborosilicate glasses: A solid‐state NMR and Raman spectroscopy study / Bisbrouck, Nicolas; Bertani, Marco; Angeli, Frédéric; Charpentier, Thibault; Ligny, Dominique; Delaye, Jean‐marc; Gin, Stéphane; Micoulaut, Matthieu. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - 104:9(2021), pp. 4518-4536. [10.1111/jace.17876]
Bisbrouck, Nicolas; Bertani, Marco; Angeli, Frédéric; Charpentier, Thibault; Ligny, Dominique; Delaye, Jean‐marc; Gin, Stéphane; Micoulaut, Matthieu...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1245379
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