Vienna et al. 6 showed that in some glasses determined to be homogeneous, a small alumina addition could significantly increase the durability of a glass. PCT, compositional analysis and TEM analysis were performed on each of the glasses. I is the measured compositions for the glasses produced. The measured compositions compare favorably with the calculated compositions.
Shaded cells represent calculated values used to replace a poor dissolution.
2 O 3 are obtained from a microwave digestion. All other elements were obtained by a lithium metaborate fusion. The current DWPF phase separation discriminator was applied to all of the above glasses. The DWPF durability model was applied to the glasses predicted to be homogeneous. The predicted boron release for the two predicted homogeneous glasses made in this study agreed well with the measured boron release.