SILICATE GLASS, METHOD FOR PREPARING SILICATE GLASS-CERAMICS BY USING THE SILICATE GLASS, AND METHOD FOR PREPARING NANO LITHIUM DISILICATE GLASS-CERAMICS BY USING THE SILICATE GLASS

摘要

Provided is a silicate glass, a method for preparing a silicate glass-ceramics by using the silicate glass, and a method for preparing a lithium disilicate glass-ceramics by using the silicate glass, and more particularly, to a method for preparing a glass-ceramics that has a nanosize of 0.2 to 0.5 μm and contains lithium disilicate and silicate crystalline phases. A nano lithium disilicate glass-ceramics containing a SiO₂ crystalline phase includes: a glass composition including 70 to 85 wt % SiO₂, 10 to 13 wt % Li₂O, 3 to 7 wt % P₂O₅ working as a nuclei formation agent, 0 to 5 wt % Al₂O₃ for increasing a glass transition temperature and a softening point and enhancing chemical durability of glass, 0 to 2 wt % ZrO₂, 0.5 to 3 wt % CaO for increasing a thermal expansion coefficient of the glass, 0.5 to 3 wt % Na₂O, 0.5 to 3 wt % K₂O, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and La₂O₃.