Sodium Borophosphate Research Articles

Structure and devitrification behaviour of sodium, lithium and barium borophosphate glasses

Thermal properties and devitrification behaviour of sodium, lithium and barium borophosphate glasses have been studied by differential thermal analysis. The results are in good agreement with the hypothesis that BO 4 groups form when a network modifier oxide (Na 2 O or Li 2 O or BaO) is added to B 2 O 3 . The excess of negative charge is compensated by metallic cations or positively charged PO 4 groups. Activation energy for crystal growth and devitrification mechanism under non isotermal condition in sodium, lithium and barium metaphosphate glasses were also evaluated.