LAS系统微晶玻璃的制备及析晶研究

采用烧结法和溶胶-凝胶法制备了LAS系统微晶玻璃,并研究了其析晶性能。结果表明,烧结法制备的样品中晶粒尺寸为100～150nm,分布均匀,主晶相为β-锂辉石相,另外含有少量的Moganite石英相,溶胶-凝胶法制备的样品中晶粒尺寸为10～60nm,分布均匀,样品中存在Al2O3和LiAlO2相,而SiO2没有结晶,形成玻璃体。核化温度为600℃、晶化温度为680℃时,微晶玻璃的结晶效果比较好。

Preparation of LAS Glass-ceramics and Investigation on Its Crystalline Behavior

The lithium aluminosilicate glass-ceramics were fabricated by sintering process and sol-gel method,and the crystalline behavior was investigated.The results show that,in the samples obtained by sintering process,the crystalline grains dispersed uniformly range from 100nm to 150nm,and the major phase is β-spodumene,in addition,there are a few moganite silica phases,while in the samples obtained by sol-gel method,the crystalline grains range from 10nm to 60nm,alumina and lithium meta aluminates are included,but silica is not crystallized,and it turns into glass.When the nucleation temperature is 600℃,the crystalline temperature is 680℃,the crystalline effect is relatively fine.