A previous set of experiments using isotopically tagged lithium demonstrated that lithium can diffuse into the glass structure farther than hydrogen at 90 �C. This result is counter to previous understandings of glass corrosion where water was believed to be the species at the forefront of any interactions between the pristine/altered glass interface. Therefore, to further the understanding of the phenomenon of lithium diffusion into glass we have conducted a set of experiments at temperatures ranging from 25 � 150 �C for various periods of time for two separate HLW simulant glasses (SON68 and CJ-6) and quartz. Results to be given in the presentation will be the activation energy of lithium diffusion as well as the diffusion constants in each type of glassy material. The relevance to the results in terms of the long-term durability of nuclear waste glasses and an understanding of glass structure will be discussed.

Low-temperature lithium diffusion in boroaluminosilicate nuclear waste glasses and quartz

247th National Meeting (2014)

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