The behavior of water in model glasses of Na 2 O - B 2 O 3 - SiO 2 systems has been studied by IR spectroscopy. and K 2 O - B 2 O 3 - SiO 2 . It has been established that hydroxyl groups and water in molecular form are present in alkaline borosilicate glasses of these systems, obtained by quenching a water-containing melt. The distribution of water between its forms and the silicate and borate components of the glass structure depends on their chemical composition. The formation of hydroxyl groups involves proton-cation exchange with the participation of non-bridging oxygen atoms coordinated by alkali metal ions.
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