抄録
The effects of ZrO2 on the crystallization behaviors of ZnO-Al2O3-SiO2 glasses were investigated in order to prepare transparent glass ceramics containing ZnAl2O4 nano-crystal. Nucleation in 20ZnO·20Al2O3·60SiO2 glass proceeded vigorously at the temperature range between 775°C and 825°C. Though a few silicate phases precipitated in as-quenched 20ZnO·20Al2O3·60SiO2 glasses, addition of ZrO2 and nucleation heat treatments promote the precipitation of ZnAl2O4. As a result, a transparent glass ceramic containing ZnAl2O4 nano-crystal was obtained by crystallization of 20ZnO·20Al2O3·54SiO2·6ZrO2 glass after the heat-treatment at 775°C for 24hr.
