Effect of Na₂O and K₂O on the Solubility and Chemical Properties of P₂O₅-CaO-Na₂O-K₂O-Al₂O₃ Glass

Abstract:

The effect addition of Na₂O on the solubility properties of phosphate glass of the composition, 45P₂O₅-18CaO-xNa₂O-(34-x)K₂O-6Al₂O_3, where x = 0,5,10,15 and 20 wt. %. has been studied. Glass transition temperature (Tg) of glass samples, weight loss and pH of the immersion solution were measured. The Tg value of the phosphate glass also decreased with the incorporation of Na₂O up to 10 wt. % and increased with the incorporation of 15 and 20 wt. %. These results indicates that the solubility and Tg value of phosphate glass were highly influence by the glass composition. The substitution of Na₂O to the phosphate glass system with the present of K₂O has decrease the solubility of phosphate glass. The released of phosphate and calcium ion seem to decrease with the increasing of Na₂O content in the glass composition.

• Periodical: Materials Science Forum (Volume 888)
• Pages: 146-150
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.888.146
• Online since: March 2017
• Authors: Siti Hafizah Mohamad, Mohd Al Amin Muhamad Nor*
• Keywords: Glass Dissolution, Ion Release, Phosphate Glass

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