使用DTA、IR光谱、Raman光谱、光电子能谱、XRD、SEM和EDAX等分析方法研究了一种组成的CaF2-Al2O3-SiO2系玻璃的结构，发现玻璃的结构是由［SiO4］和［AlO4］以顶角相连的方式构成基本网络骨架，Ca2＋处于网络间隙，F-有一部分取代O2-进入玻璃网络，另一部分停留在网络间隙，Al3＋也有一部分处于网络间隙．F-取代O2-进入玻璃网络，削弱了玻璃的网络结构，使玻璃发生了分相，其中一相富含Si4＋和Al3＋，另一相富含Ca2＋和F-，热处理时，CaF2晶体首先从这一相中析出．
The structure of CaF2-Al2O3-SiO2 system glass was investigated by using the methods of DTA, IR, Raman, XPS, XRD, SEM and EDAX.
It was found that the structure units, [SiO4] and [AlO4], were linked to form the basic network by means of angle connection and the ions Ca2+
were located as the network modifiers. Some ions F- entered as the network formers through replacing O2-, and other ions F- were located as the
network modifiers. There were also some ions Al3+ staying as the network modifiers. Because the F- entered as the network formers, the structure of
network became more loose and phase separation of glass took place. Two kinds of different phase regions were formed in the glass, and one region contained more
Ca2+ and F-, whereas another region contained more Si4+ and Al3+. When the above glass with phase separation was heat-treated, the crystals of
CaF2 firstly came out from the regions containing more Ca2+ and F-.
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