Abstract
Precipitation of nano-ZnO crystallites was observed in the CaO-B2O3-ZnO-K2O-SiO2-Al2O3 glass after heat-treatment. Addition of Al2O3 and SiO2 affects selective crystallization of ZnO.TEM image showed that precipitation of ZnO crystallites of 500 nm occurred at the surface of the transparent crystallized glass.The present ZnO crystallized glass will be a functional material using the property of ZnO.