An NMR study of the photoconducting glass systems CdOB2O3GeO2 and CdOB2O3SiO2

Structure–property correlations in lead borate and borosilicate glasses doped with aluminum oxide

“…They are also consistent with boron speciation in other metal-oxide borate glasses such as ZnO-B 2 O 3 [64], CdO-B 2 O 3 [65] and SnO-B 2 O 3 [19] which have maximum N 4 values at 50 mol% metal oxide. Note that this contrasts sharply with the well-known case of alkali borates, where non-bridging oxygens begin to form much earlier, resulting in a maximum N 4 at about 35 mol% M 2 O [48,62,66].…”

Nuclear Magnetic Resonance in Glass

“…N 4 values fall short of the N 4 = R prediction at low values of R, indicating an early appearance of NBOs associated with boron and silicon as well (Fig. Mulkern et al (1986) measured N 4 for this glass system (Fig. The data indicate a greater probability of Ba + + ions being associated with the borate network over the silicate network.…”

Partitioning of gadolinium and its induced phase separation in sodium-aluminoborosilicate glasses

“…Partitioning is an important mechanism that can be used to explain speciation of borate groups, BO 3 $ BO 4 , found from 11 B MAS NMR spectroscopic studies of the borosilicate systems with monovalent [13,15,35,38], divalent [39,40], and trivalent cations [41][42][43]. The partitioning of the network-modifying cations in the borate-rich environments can be understood in terms of acid-base reaction.…”