Effect of Nucleating Agents and Heat Treatments on the Crystallization of Magnesium Aluminosilicate Transparent Glass-ceramics
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第1期
论文作者：王静 CHENG Jinshu 汤李缨 TIAN Peijing
文章页码：69 - 72
摘 要：The crystallization behavior and transparent property of MgO-Al2O3-SiO2 （MAS） glasses with TiO2 and TiO2+ZrO2 as nucleating agents were discussed by differential thermal analysis, X-ray diffraction, field emission-environment scanning electron microscope, energy dispersive spectrum and UV-VIS-NIR scanning spectrophotometer. It was found that the glass crystallized at 950 ℃ with ZrO2 less than 3% could obtain transparent glass ceramic, which presented purple to colorless. With the nucleating agent additives （5% TiO2+3% ZrO2）, the colorless transparent glass-ceramics with spinel as the main crystal phase could be prepared, and the transmittance reached about 80% . As the crystallized temperature increase to 1 000 ℃, besides spinel（MgAl2O4）, sapphirine （Mg3.5Al9Si1.5O20） and ZrTiO4 precipitated from matrix glass, and the transmitance of glass-ceramic decreased.
王静，CHENG Jinshu，汤李缨，TIAN Peijing
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
摘 要：The crystallization behavior and transparent property of MgO-Al2O3-SiO2 （MAS） glasses with TiO2 and TiO2+ZrO2 as nucleating agents were discussed by differential thermal analysis, X-ray diffraction, field emission-environment scanning electron microscope, energy dispersive spectrum and UV-VIS-NIR scanning spectrophotometer. It was found that the glass crystallized at 950 ℃ with ZrO2 less than 3% could obtain transparent glass ceramic, which presented purple to colorless. With the nucleating agent additives （5% TiO2+3% ZrO2）, the colorless transparent glass-ceramics with spinel as the main crystal phase could be prepared, and the transmittance reached about 80% . As the crystallized temperature increase to 1 000 ℃, besides spinel（MgAl2O4）, sapphirine （Mg3.5Al9Si1.5O20） and ZrTiO4 precipitated from matrix glass, and the transmitance of glass-ceramic decreased.
关键词：
