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Structural role of MgO and PbO in MgO–PbO–B2O3 glasses as revealed by FTIR; a new approach

“…The fraction N 4 of four coordinated boron of a glass containing 45 mol% MgO is reported as 0.2. This value is mostly the same as that of the corresponding ZnO-B 2 O 3 glass [9], but is considerably lower than for alkali-or barium borate glasses. Like the case for ZnO-B 2 O 3 glasses, where some of ZnO would form its own ZnO 4 tetrahedral units [9,10], MgO might be able to be network former in certain cases.…”

Density–structure correlations in Na2O–CaO–P2O5–SiO2 bioactive glasses

“…[15] (}), [16] (N), [17] (4) and the present work (Ç). The data calculated by Demkina [16] and Priven [17] are taken from Ref. [15].…”

“…Fig. 3 presents a comparison between the experimental density [15] of the glasses in Series III (Table 2) and calculated density obtained by different techniques [15][16][17], in addition to that of the present work. Lusvardi et al [15] applied molecular dynamic simulations to derive a descriptor that correlates the change in density with the overall packing degree of structural units in the glass.…”

“…Lusvardi et al [15] applied molecular dynamic simulations to derive a descriptor that correlates the change in density with the overall packing degree of structural units in the glass. On the other hand Demkina [16] and Priven [17] used semi-empirical methods based on additive relations, with a specific contribution of each oxide in the glass. These additive relations are however useful to correlate the density with the concentration of oxides in the glass only where the property changes linearly.…”

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

“…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].…”