Durability of some gamma-irradiated alkali borate glasses

• Published in: Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 1994-07, Vol.44 (1-2), p.45-51
• Main Authors: El-Alaily, N.A., Ezz-Eldin, F.M., El-Batal, H.A.
• Format: Article
• Language: English
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/0969-806X(94)90101-5

Dissolution of glass coupons in acid solution with the general composition 80 B2O3, 10 Na2O and 10 RO (divalent oxide) has been monitored with and without λ-irradiation. The increase in glass solubility upon λ-ray irradiation is interpreted in relation to the expected radiation damage in the glass matrix, which is possibly due to the competition between the intrinsic defects and the induced defects incurred by irradiation. The decrease in glass durability at 100°C is related to the increase in the activation energy of the corrosion process which leads to the dissolution of B from the glass and the formation of a surface layer. Moreover, the role of alkaline earth metal is also discussed according to the influence of the size and activity coefficient of cations, as well as its ability to be adsorbed on the glass surface. Also the amount of Na released from the leaching solution for the different ternary glasses was estimated and evaluated.