GeS2-Ga2S3-CsCl系统玻璃的微结构研究

对准三元系统玻璃GeS2-Ga2S3-CsCl中两个系列样品的室温拉曼谱进行了系统的探测和分析．基于Cs^ 对混合阴离子基团GaS3／2Cl影响的分析，解释了低CsCl含量时样品的拉曼谱演变；基于Cs^ 对桥式单元Ga2S4Cl2影响的分析，解释了Ga2S3—2CsCl玻璃和二聚物Ga2Cl6熔体拉曼谱相似和变化的原因，并在此基础上解释了高CsCl含量时GeS2-Ga2S3-CsCl系统玻璃样品的拉曼谱演变．根据拉曼谱的微结构起源，GeS2-Ga2S3-CsCl玻璃的微结构被推测是Cs^ 以氯原子为最近邻配位的单壳层形式均匀地分布在由GeS4/2，GaS3／2Cl，Ga2S4Cl2等结构单元通过桥硫键联接而形成的玻璃网络中．

Microstructural Study On the GeS2-Ga2S3-CsCl Glasses

Raman spectra of GeS2-Ga2S3-CsCl pseudo-ternary glasses at room temperature in the air were probed systematically in the 150-500cm-1 region. Based on the evolution of Raman spectra and preparing procedure in pseudo-binary systems GeS2-CsCl and Ga2S3-CsCl, the sole interaction of Ga2S3 and CsCl was identified and the formation of new units GaS3/2Cl was verified in GeS2-Ga2S3-CsCl glasses. That Cs+ ions in the form of Cl as the nearest coordination are homogeneously dispersed in the polymeric network was confirmed by the Raman spectra evolution of samples on two serials. Raman spectral evolution of two composition serials can be successfully interpreted by using a localized model considering the effect of Cs+. ions on the structural units GaS3/2Cl and Ga2S4Cl2.