Percolation Phenomenon for Dissolution of Sodium Borosilicate Glasses in Aqueous Solutions |
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| Authors: | Masahiro Kinoshita Makoto Harada Yasuo Sato Yoichi Hariguchi |
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| Affiliation: | Research Section of Nuclear Chemical Engineering, Institute of Atomic Energy, Kyoto University, Uji, Kyoto 611, Japan |
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| Abstract: | A percolation phenomenon has been discovered for the dissolution of sodium borosilicate glasses in aqueous solutions under low-pH conditions (pH ∼2). The glasses fall into one of two categories which are markedly different in the dissolution behavior, in terms of whether the Si/B ratio in the glass network exceeds a threshold value or not. The transition from one of the categories to the other is very sharp when the Si/B ratio is changed as the key parameter. The qualitative aspects of the experimental observation can be explained very well by a simple model combined with the site percolation theory. |
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| Keywords: | glass borosilicates percolation dissolution storage |
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