等温热处理对Li_2O-Al_2O_3-SiO_2系玻璃析晶的影响  

Effect of the Isothermal Heat Treatment on Crystallization of LAS Glass

作　　者：汤李缨[1] 刘江华[1] 刘庭辉[1] 魏德法 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070 [2]威海蓝星玻璃股份有限公司,威海264200

出　　处：《武汉理工大学学报》2009年第22期48-50,54,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50802065);武汉理工大学校基金(xjj2007057)

摘　　要：采用X射线衍射仪和扫描电子显微镜研究了等温热处理对Li2O-Al2O3-SiO2(LAS)系玻璃析晶的影响。研究结果表明:玻璃试样在800℃左右开始析出β-石英固溶体晶相,在900℃保温40 min左右,部分的β-石英固溶体开始转化为β-锂辉石固溶体。不仅温度对LAS系玻璃内部晶相的类型有影响,等温热处理的时间也是重要影响的因素。特定组成的LAS系玻璃在适当温度作等温热处理后,也可以达到晶体发育较为完整、分布致密均匀的效果。Effect of the isothermal heat treatment on crystallization of Li2O-Al2O3-SiO2 glass was researched by X-ray diffraction and scanning electron microscopy.The results indicate that precipitated phase is β-quartz solid solution at about 800 ℃;partial transformation form β-quartz to β-spodumene solid solution appears at 900 ℃,40 min or so.Not only temperature influences crystal phase of the LAS glass,the time of isothermal heat treatment is also an important factor.Specific components of the LAS glass for isothermal heat treatment at a suitable temperature, can also achieve the effect of crystal development com- plete and uniform distribution of dense.

关 键 词：等温热处理 LI2O-AL2O3-SIO2 玻璃 析晶 

分 类 号：TQ171.682[化学工程—玻璃工业]