Zinc aluminosilicnte glasses containing Li2 O, ZnO , Al2 O3 and SiO2 were prepared by conventional melting and quenching technique, and subsequently converted to transparent glass- ceramics by controlled nucleation and crystallization.The glass was melted in a platinum crucible at 1 600 ℃ for 2 h and then two-step heat treated for the nucleation and the crystal growth.The nucleation and crystallization temperatures were deter mined by differential thermal analysis.Specimens heat-treated on different schedules were analyzed by the X-ray diffraction to determine crystalline phases.Scanning electron microscopy was used to study the glass-ceramics mor phology, the grain size and distribution in the residual glass matrix.The reorganization of the amorphous solidwas confirmed by FT-IR spectroscopy.The transmittance was measured by a UV-Vis-NIR scanning spectrophotometer .