加热温度对烧结制备Li_2O-Al_2O_3-SiO_2系玻璃陶瓷显微结构的影响  

Effect of Sintering Procedure on Microstructure of Li_2O-Al_2O_3-SiO_2 Glass-ceramics

作　　者：王浩[1] 陆雷[1] 张乐军[1] 赵莹[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《机械工程材料》2008年第2期24-26,73,共4页Materials For Mechanical Engineering

摘　　要：以Li2O-Al2O3-SiO2(LAS)系为基础玻璃成分,以碳酸锂、二氧化硅、氧化铝等为原料,采用烧结法制备了LAS系微晶玻璃。使用DTA分析了玻璃的析晶过程,运用XRD、SEM等测试分析手段对材料的晶相和晶粒大小进行了观察和分析,并讨论了加热温度对制品的烧结程度、主晶相及晶粒大小的影响。结果表明:当温度低于940℃时,所制微晶玻璃的主晶相为β-石英固溶体,高于940℃时主晶相转变为β-锂辉石;在1 120℃时,烧结效果最好,在1 170℃晶化效果最好,晶粒尺寸为0.5~3μm。Li2O-Al2O3-SiO2(LAS) glass-ceramics are widely used to manufacture heating equipment because of its advantages such as low expansion,excellent mechanical properties and high heat resistance.LAS were prepared via sintering method,using some chemical regents as raw materials. The crystallization process of LAS system glass-ceramic was analyzed by means of DTA.Phase composition and microstructure were investigated by XRD and SEM.The influence of temperature on the major crystalline phase and crystallite size w...

关 键 词：LAS系微晶玻璃 烧结温度 显微结构 

分 类 号：TQ174.1[化学工程—陶瓷工业]