晶化温度对Li_2O-Al_2O_3-SiO_2系微晶玻璃析晶和显微结构的影响  

Effect of Crystallization Temperature on Crystallization and Microstructure of Li_2O-Al_2O_3-SiO_2 Glass-ceramics

作　　者：赵莹[1] 陆雷[1] 张乐军[1] 王浩[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《材料导报》2007年第F11期360-362,366,共4页Materials Reports

摘　　要：采用盖热分析(DTA)、红外光谱分析(IR)、X衍射分析(XRD)、扫描电镜(SEM)等分析手段对Li_2O- Al_2O_3-SiO_2系微晶玻璃的析晶和微观结构进行了研究。结果表明:随晶化温度升高,玻璃首先析出β-石英固溶体晶体,晶化温度升高β-石英固溶体向β-锂辉石固溶体转变,晶粒尺寸及含量逐渐增大,但晶化温度过高这种趋势变化不大。最佳的晶化温度为810℃,所制得的微晶玻璃具有低膨胀相的晶体结构,可获得较好的热膨胀性能。The crystallization and microstructure of Li2O-Al2O3-SiO2 system glass-ceramics are studied by DTA, IR, XRD and SEM. The results show that β-quartz solid solution precipitated first at the initial crystallization temperature, then β-spodumene with increasing crystallization temperatures. And the size and percentage of crystal particles gradually increase. However, the higher crystallization temperature has much less influence on the trend. When the crystallization temperature is 810℃, excellent thermal expansion properties can be obtained, and the glass-ceramics can be used as low thermal expansion materials.

关 键 词：微晶玻璃 晶化温度 晶相 显微结构 

分 类 号：TQ171.1[化学工程—玻璃工业]