Preparation of nanoscale Li2O-Al2O3-SiO2glass-ceramic by polyacrylamide gel method
来源期刊：中国有色金属学报(英文版)2003年第z1期
论文作者：WU Song-quan(吴松全) HE Li-na(何利娜) WANG Fu-ping(王福平) LEI Ting-quan（雷廷权）
文章页码：80 - 83
Key words：polyacrylamide gel; Li2O-Al2O3-SiO2 glass ceramic; β-eucryptite solid solution
Abstract: Polyacrylamide gel method as one of liquid methods, is first used for Li2O-Al2O3-SiO2 glass-ceramic. Acrylamide, N, N’-methylene-bisacrylamide, nitrates of aluminum and lithium carbonate，and tetraethoxy silane are used as precursors. The gel can be obtained by the polyacrylamide gelling, and then is dried out. After that the dried gel is calcined at different temperatures. X-ray powder diffraction (XRD), Thermal analysis (TG and DTA) and FT-IR spectroscopy analysis are utilized to characterize the gel powder. Transmission electron microscope (TEM) is used to observe the microstructure of the calcined products. For the dried gels heated from 800℃ to 1000℃, the only crystalline phase obtained is β-eucryptite solid solution. The average particle size of the powders is in nanometer scale with a narrow size distribution. This processing route provides the basis for a low-cost, low-temperature and time-saving method for the preparation of homogeneous nanometer-sized multicomponent ceramic glass powders compared with other conventional methods.
WU Song-quan(吴松全), HE Li-na(何利娜), WANG Fu-ping(王福平), LEI Ting-quan（雷廷权）
(School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China)
Abstract:Polyacrylamide gel method as one of liquid methods, is first used for Li2O-Al2O3-SiO2 glass-ceramic. Acrylamide, N, N’-methylene-bisacrylamide, nitrates of aluminum and lithium carbonate，and tetraethoxy silane are used as precursors. The gel can be obtained by the polyacrylamide gelling, and then is dried out. After that the dried gel is calcined at different temperatures. X-ray powder diffraction (XRD), Thermal analysis (TG and DTA) and FT-IR spectroscopy analysis are utilized to characterize the gel powder. Transmission electron microscope (TEM) is used to observe the microstructure of the calcined products. For the dried gels heated from 800℃ to 1000℃, the only crystalline phase obtained is β-eucryptite solid solution. The average particle size of the powders is in nanometer scale with a narrow size distribution. This processing route provides the basis for a low-cost, low-temperature and time-saving method for the preparation of homogeneous nanometer-sized multicomponent ceramic glass powders compared with other conventional methods.
Key words:polyacrylamide gel; Li2O-Al2O3-SiO2 glass ceramic; β-eucryptite solid solution
