中文摘要：

用熔融法制备了不同组成的TeO2-BaO／BaCl2系统玻璃，用差热分析、x射线衍射、红外光谱、紫外一可见光吸收光谱、透射电镜等考察了该系统的成玻璃性和析晶性能，探讨了玻璃的网络结构和组成变化对析晶性能的影响。结果表明：BaO或BaCl2的引入能加强碲氧链间连接，促使碲酸盐玻璃中的[TeO4]基团向[TeO3＋1]和[TeO3]基团转变，并改变碲氧链的结构及长度。与TeO2-BaO系统相比，TeO2-BaCl2系统成玻璃区域大大扩展，网络结构中键合及基团种类增多，链间的连接加强且链的断裂减少，网络结构趋于均匀，热稳定性好，有利于AgCl纳米晶体析出。

英文摘要：

The forming abilities and crystallizing properties of TeO2-BaO/BaCl2 glasses were investigated by differential thermal analysis, X-ray diffraction, infxared absorption spectroscopy, ultraviolet-visible absorption spectroscopy and transmission electron microscopy. The influences of composition and network on the crystallization of the glasses were also discussed, which contribute to the studies of nanocrystals-doped tellurite optical glasses. It was found that introducing BaO or BaCl2 into tellurite glasses would increase the number of structural units by turning some of the [TeO4] into [TeO3] and [TeO3＋1]; it also changed the structure and length of Te-O chains. Compared with TeO2-BaO glasses, TeO2-BaCl2 glasses has more bridging bonds, more Te-O chains and a more homogeneity of network. Thus the glass forming ability and thermal stability of TeO2-BaCl2 glasses are better than those of TeO2-BaO glasses. ZeO2-BaCl2 glasses are also favorable for the crystallization of AgCl nanocrystals.