Effect of Fluorine on the Structure of Phosphate Glass
We have used x-ray photoelectron and Raman spectroscopies to characterise the effect of the incorporation of F on the short range structure of Na-P-O and Na-Al-P-O glasses. The incorporation of F into NaPO3 depolymerises the glass structure by preferentially replacing bridging oxygen with chain terminating P-F bonds. The addition of AlF3 to NaPO3 modifies the phosphate network primarily by linking Al(O,F) polyhedra with P(O,F)4 tetrahedra. Remelting these latter glasses with NH4HF2 increases their F contents and depolymerises the structure through the formation of additional P-F and Al-F bonds at the expense of the bridging POAl bonds. Changes in glass properties are sensitive to these structural modifications.
R. K. Brow et al., "Effect of Fluorine on the Structure of Phosphate Glass," Physics and Chemistry of Glasses, Society of Glass Technology, Oct 1991.
Materials Science and Engineering
Article - Journal
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