Abstract
The rate of bulk crystallization and shear viscosity η of a zinc borosilicate simulated nuclear waste disposal glass (SNWDG) were measured above the glass transition temperature Tg. Using recent theories and experimental data for the temperature dependence of η at <Tg, the crystallization rate below Tg was calculated; well below Tg the SNWDG (and, more generally, any high‐silica glass) will not crystallize appreciably over any important time period for radioactive decay of fission products.
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