The structure of sodium borosilicate glasses: thermodynamic modelling vs. experiment

The present paper continues a consideration of the thermodynamic modelling of the structure of sodium borosilicate glasses. The suggested approach, based on the model of associated solutions, allows the distribution of the borate and silicate basic structural units in glasses and melts to be calculated over extended composition and temperature ranges. The modelling has been performed in the cut with X Na 2 O / X B 2 O 3 = 1 , due to which the data obtained previously have been refined, and in the cut with X Na 2 O = 0.20 . In both cases, the model results are compared with the available NMR data. For glasses with X Na 2 O / X B 2 O 3 = 1 and X SiO 2 / X B 2 O 3 = 3 , the structure–property relationship has been analyzed by the example of the densities.