Grabsi, AminaChorfa, Abdellah2019-05-262019-05-262018-12-10https://dspace.univ-eloued.dz/handle/123456789/1556International Symposium on Mechatronics and Renewable Energies El-Oued 10- 11 December 2018Glass ceramics materials were prepared from a ZnO-Al2O3-SiO2 glass, these glasses were heat treated at 890°C during 2,4 and 8 hours. An optical study using a Scanning Electron Microscopy, and Spectro-colorimetry were carried in order to find the effect of the holding time on the crystallization of this glass.enGlass-ceramic, Crystallization, SEM, ColorimetryOther