Bi_2O_3-Ga_2O_3-CdO系统玻璃的Raman光谱和X射线光电子能谱研究

RAMAN SCATTERING AND X_RAY PHOTOELECTRON SPECTROSCOPIES OF Bi_2O_3-Ga_2O_3-CdO GLASSES

用X射线光电子能谱和Raman光谱研究了Bi2 O3-Ga2 O3-CdO系统玻璃的结构 .Raman光谱曲线被分离成 6个谱带 ,4条谱带分属于不同键长的Bi—O振动 ,一条谱带属于Ga—O振动 .Bi2 O3-Ga2 O3 二元系统玻璃的Raman散射最强峰位于 40 0～ 42 0cm- 1 ,当Ga3 + 离子被Cd2 + 离子取代后 ,Raman散射最强峰移向 5 95～ 6 30cm- 1 .随着Ga2 O3 含量的增加 ,位于高波数属于Bi—O振动的 2条谱带强度降低并朝低波数移动 ;位于低波数属于Bi—O振动的 2条谱带强度增加并朝高波数移动 ,添加CdO则出现相反的效应 .X射线光电子能谱显示出非常低的O1s电子结合能 ,甚至低于碱硅酸盐玻璃中非桥氧的O1s电子结合能 ,并且不可能分为桥氧和非桥氧 ,O1s和Bi4f的电子结合能都随Ga2 O3

The Bi 2O 3-Ga 2O 3-CdO glasses were measured by Raman scattering and X_ray photoelectron spectra. The Raman spectra are divided into six vibrational modes.Four of the modes are assigned to Bi-O vibrations and one is Ga-O vibration. The strongest peak is at about 400-420 cm -1 in binary Bi 2O 3-Ga 2O 3 glasses. However, when Cd 2+ ion replaced the Ga 3+ ion,the strongest peak shifts to about 595-630 cm -1 . With increasing Ga 2O 3 content, the two Bi-O vibrational modes at high wavenumber side shift to low wavenumber and their intensity are decreased, while the two Bi-O vibrational modes at low wavenumber side shifted to high wavenumber with increased intensity. However, the contrary effect is produced with addition of CdO content. The X_ray photoelectron spectroscopy indicated that the O 1 s binding energy in the glasses is even lower than that of non_bridging oxygen in alkali silicate glasses. The binding energy increased with increasing Ga 2O 3 or CdO content.