【摘要】 本文以24Li₂O·76SiO₂玻璃为基础,引入不同量的Al₂O₃及AlN,发现AlN的加入与Al₂O₃一样能抑制玻璃的分相和析晶以及提高T_g温度,且其作用更为明显。作者在研究这些玻璃的析晶行为的同时,发现添加Al₂O₃后使玻璃呈表面析晶,添加AlN后玻璃则整体析晶。这主要是由于在氧氮玻璃中存在的Si₂ON₂微晶起了诱导析晶的作用所致。这些玻璃的分相与析晶现象都能用它们的结构变化加以解释。更多还原

【Abstract】 In this study,different amounts of Al₂O₃ and AlN were added in 24Li₂O·76SiO₂ glass. It is found that the addition of AlN as well as Al₂O₃ would inhibit phase separation, crystallization and increase of temperature T_c, and the effect of AlN is stronger than that of Al₂O₃.Examining the crystallization behavior,the authors find that the glasses containing Al₂O₃ are surface-crystallized, while the glasses containing AlN are bulk-crystallized.The latter is mainly due to the crystallization induced by Si₂ON₂ microcrystals in oxynitride glasses. The phenomena of phase separation and crystallization of these glasses could be explained by their structure variation.更多还原