物理化学学报 >> 1998, Vol. 14 >> Issue (11): 961-964.doi: 10.3866/PKU.WHXB19981101

通讯    下一篇

O2气中激光烧蚀Ta2O5产物离子的氧化反应

辜振宁, 王雪峰, 秦启宗, 陈宏, 郑兰荪   

  1. 复旦大学激光化学研究所,上海 200433|厦门大学化学系,固体表面物理化学国家重点实验室,厦门 361005
  • 收稿日期:1998-07-07 修回日期:1998-08-31 发布日期:1998-11-15
  • 通讯作者: 王雪峰

Formaton of lonic Ta-containing Oxides from laser Ablation of Ta2O5 in Ambient O2

Gu Zhen-Ning, Wang Xue-Feng, Qin Qi-Zong, Chen Hong, Zhen Lan-Sun   

  1. Institute of Laser Chemistry,Fudan University,Shanghai 200433|The State Key Laboratory for Physical Chemistry of the Solid Surface,Department of Chemistry,Xiamen University,Xiamen 361005
  • Received:1998-07-07 Revised:1998-08-31 Published:1998-11-15
  • Contact: Wang Xue-Feng

关键词: Ta2O5, 激光烧蚀, 飞行时间质谱, 离子氧化

Abstract:

The mass spectra of both positive and negative charged Ta-containing ions from laser ablation of Ta2O5 were measured using a time-of-flight mass spectrometer. Formation of ionic Ta-containing oxides such as TaO3+ and TaO4+ from Ta2O5 ablation in ambient O2 were observed for the first time. The influence of ambient O2 pressure on the intensities of ablated Ta-containing ions has also been studied. It is found that the subsequent oxidation reactions were involved in the ablation of Ta2O5 at different O2 pressure. The enthalpies of possible oxidation reactions were theoretically calculated, and the possible formation reactions of the ionic Ta-containing oxides are discussed.

Key words: Ta2O5, Laser ablation, Time-of-flight mass spectra, Ionic oxide formation