Abstract:The glass with composition 13Na2O‐11CaO‐76SiO2 (mol%) undergoes subliquidus phase separation via a binodal mechanism. At temperatures below the binodal temperature, Tb = 978 K, the glass separates into two amorphous phases, silica‐enriched droplets and a silica‐poor matrix. Small‐angle X‐ray scattering was used to study the formation of the droplet phase at 923 K as well as the process of reversion where the precipitates dissolve after an increase in temperature. After a heat treatment of 48 h at 923 K the sys… Show more
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