CaO－Al_2O_3－SiO_2系白色微晶玻璃中的晶相及其演变  

Crystal Phase and its Change in White Glass-Ceramics in CaO-Al_2O_3-SiO_2 System

作　　者：王开泰[1] 李汉良[1] 陈幼新[1] 沈定坤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《无机材料学报》1996年第2期214-218,共5页Journal of Inorganic Materials

摘　　要：应用差热分析和Ｘ射线衍射谱研究了若干以ＺｎＳ为晶核剂的Ｒ２Ｏ－ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系白色微晶玻璃．根据差热结果确定了四个不同的晶化处理温度．晶化结果表明：本系统玻璃在较低温度下即开始晶化，且均以α－硅灰石为主晶相，这可用ＺｎＳ与α－硅灰石间晶核常数的匹配来解释．当晶化处理温度高于９５０℃，多数玻璃中发生主晶相由α－硅灰石向β－硅灰石或透辉石转化，这从键能角度可以理解．Some R2O-CaO-Al2O3-SiO2 system white glass-ceamics with ZnS as nucleating agent were studied by means of DTA and XRD. Four different temperature were chosen as crystallization temperature according to DTA results. The XRD results indicate that glasses in this system start crystallization at a temperature as low as 805℃, and predominant crystal phase is pseudowollastonite. It can be explained by the fact that the lattice parameters of ZnS and pseudowollastonite are well matched. When heat-treatment temperature was higher than 950℃, the pseudowollastonite as predodriant phase turned to wollastoniteor diopside in most glasses. It can be understood from the viewpoint of bond energy.

关 键 词：白色 微晶玻璃 晶相 晶化处理 差热分析 

分 类 号：TQ171.733[化学工程—玻璃工业]