Li-Mg-Al-Si系微晶玻璃制备及其显微结构  

Li-Mg-Al-Si System Glass Ceramics and Its Microstructure

作　　者：吴建锋[1] 李传国[1] 徐晓虹[1] 骞少阳[1] 刘茜[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《武汉理工大学学报》2009年第20期1-3,共3页Journal of Wuhan University of Technology

基　　金：863项目(2008AA05Z418)

摘　　要：以工业氧化铝、滑石、苏州土和碳酸锂为主要原料,高温熔融制备了Li2O-MgO-Al2O3-SiO2系基础玻璃。采用TG-DTA分析确定了微晶玻璃的核化温度和晶化温度分别为730℃和1150℃,以升温速率5℃/min进行核化、晶化。XRD分析表明微晶玻璃相组成为锂辉石、堇青石和镁铝尖晶石。SEM观察到样品中有大量粒径在0.5μm左右的微晶粒析出。Li2O-MgO-Al2O3-SiO2 glass was prepared by using cheap industrial raw materials, such as alumina, talcum, kaolin and Li2CO3. The TG-DTA results show that the optimal processing regime is nucleation at 730 ℃ for 1 h followed by crystallization at 1 150 ℃ for 2 h with heating rate 5 ℃/min. The XRD patterns indicate that the main crystalline phases are spodumene, cordierite and magnesium aluminum spinel, and the SEM analysis shows there is a large amount of tiny crystals.

关 键 词：堇青石 锂辉石 微晶玻璃 核化温度 晶化温度 相组成 

分 类 号：TQ174[化学工程—陶瓷工业]