ABSTRACT
Photosensitive Glass and Glass-Ceramics a lowering of the free energy barrier to crystallization by the composition changes in a local area. The absorption peak shift was used rather than the change in the absorption band half-width because the latter was significantly altered by the absorption edge owing to the cerium contained in the glass. The advantages that may arise from the photo-patterned nepheline glass-ceramic may be to utilize the different mechanical or optical properties from the patterned structure. The mechanism for this second stage of nucleation from the glass of a Na-aluminosilicate phase from a NaF nuclei that in turn was produced from a photonucleated Ag particle suggests no simple explanation in terms of what is generally dealt with in the literature for the standard nucleation phenomenon.
