Structural modeling of lithium borosilicate glasses via NMR studies

Effects of cation field strength on the structure of aluminoborosilicate glasses: High-resolution 11B, 27Al and 23Na MAS NMR

“…Some studies [2,3,[37][38][39][40][41] have begun to systematize the structural changes caused by adding Al 2 O 3 to borosilicates. Aluminum in these compositions generally is predominantly [4] Al, but high field 27 Al NMR spectra have revealed the added complication of significant [5] Al, especially in glasses with divalent modifier cations [39,42]. Despite these efforts, the systematic effects of one of the most commonly used compositional variations, the field strength of the modifier cation, have only been explored in a few aluminoborosilicate systems.…”

“…Many studies have documented the close relationships between physical properties and structure of boron-containing glasses [11][12][13][14][15][16][17][18]. Extensive efforts have also been made to model the effects of composition on properties [19][20][21], many of which are based on structural speciation reactions [22][23][24][25][26][27].…”

“…Constraints on boron coordination in glasses come mostly from NMR, beginning with many early 'wideline' NMR studies [27][28][29][30][31], then more recently with high field and high-resolution 11 B MAS NMR [32][33][34][35][36]. Compositional effects on N 4 are now especially well-known for alkali borosilicates, but more complex systems are less well-understood.…”

Characterization of the low temperature firing BaO–B2O3–SiO2 glass: The effect of BaO content

“…Changes in property with variations of the composition are denoted with the borate anomaly, and the phenomena has been examined in various glass systems. 5 The structure of glass has been studied by nuclear magnetic resonance (NMR) [7][8][9][10][11][12] and Raman spectroscopy [12][13][14][15][16][17] for about 40 years. As an example, 11 B NMR was first used by Bray et al in order to quantify the proportions of three-and fourcoordinated borons in B 2 O 3 , borate and borosilicate glasses.…”

A theoretical interpretation of the chemical shift of 29Si NMR peaks in alkali borosilicate glasses

“…Various alkali distribution models have been proposed by Dell et al (1983) and Zhong et al (1988) from 11 B NMR, MacKenzie et al (1994) from 29 Si magic angle spinning (MAS) NMR, and Miura et al (2001) from X-ray photoelectron spectroscopy (XPS). However, these models have been applied only to their own experimental results and have not been tested using the experimental data collected from the different spectrometries.…”