董伟,卢金山

• 1:南昌航空大学材料科学与工程学院

摘要(Abstract)：

通过熔融法制备了不同MgF2含量的Li2O-Al2O3-SiO2(LAS)透明微晶玻璃,利用差热分析仪、X射线衍射仪、场发射扫描电镜、紫外可见分光光度计等测试技术,研究MgF2含量对LAS微晶玻璃的热处理温度、显微结构以及光学性能的影响规律。结果表明,随着MgF2含量增加,玻璃晶化温度明显降低;LAS微晶玻璃的主晶相为石英固溶体,其晶粒尺寸先降低后增大;MgF2含量增大到2 wt%时,晶粒异常长大,晶粒间出现粘连,导致LAS微晶玻璃失透。利用分相成核理论初步分析了LAS透明微晶玻璃的组织结构和光学性能的变化机理。MgF2的晶粒细化作用为制备透明、高强韧LAS微晶玻璃提供了可能。

关键词(KeyWords)： 热处理;MgF2;微晶玻璃

Abstract:

Keywords:

基金项目(Foundation): 航空科学基金资助项目(2007ZF56011)

作者(Author): 董伟,卢金山

DOI: 10.13289/j.issn.1009-6264.2011.06.003

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