Effect of TiO2 on the Crystallization of CaO-Al2O3-SiO2 System Glass
TiO2对CaO-Al2O3-SiO2系玻璃晶化机理的影响

The method of differential thermal analysis (DTA) was used to investigate the effect of TiO2on the crystallization of CaO-Al2O3-SiO2 system glass. When TiO2 is added to the CaO-Al2O3SiO2 system glass, the glass network becomes more loose, that leads to the viscosity of glass,transition temperature Tg and crystallization peak temperature Tp decreasing. That the glass isdifficult or easy to crystallize does not mean that the crystallization peak temperature Tp is highor low. Whether the CaO-Al2O3-SiO2 system glass contains TiO2 or not, the glass mainly beginsto crystallize from the surface. When TiO2 is used as a nucleation agent, its effect on promotingcrystallization is not obvious. After heat-treatment at the nucleation temperature for a long time,CaO-Al2O3-SiO2 system glass containing TiO2 still begins to crystallize from the surface, and themore TiO2 the glass contains, the more obvious the surface crystallization is.