The alkali distribution in borosilicate glass has been discussed on the basis of the different quantities obtained by various experimental methods. The NBO fraction was chosen as a common quantity for evaluating the alkali distribution models. The NBO fractions in sodium borosilicate glasses were estimated from 11B and 29Si NMR as well as XPS. However, the best model was not found among the existing models. The amounts of sodium oxide consumed for the NBO formation in borate and silicate networks and for the formation of BO4 units were separately estimated from the 11B and 29Si NMR data. A new trend was found in the alkali distribution suggesting the possibility for a new universal distribution model.
|Number of pages||5|
|Journal||Physics and Chemistry of Glasses|
|Publication status||Published - Jun 1 2003|
ASJC Scopus subject areas
- Ceramics and Composites
- Physical and Theoretical Chemistry