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Citation: Gu Zhen-Ning, Wang Xue-Feng, Qin Qi-Zong, Chen Hong, Zhen Lan-Sun. Formaton of lonic Ta-containing Oxides from laser Ablation of Ta₂O₅ in Ambient O₂[J]. Acta Physico-Chimica Sinica, ;1998, 14(11): 961-964. doi: 10.3866/PKU.WHXB19981101 shu

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

1.
Institute of Laser Chemistry,Fudan University,Shanghai 200433

Received Date: 7 July 1998
Available Online: 15 November 1998

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.
- Ta2O5,
- Laser ablation,
- Time-of-flight mass spectra,
- Ionic oxide formation
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Formaton of lonic Ta-containing Oxides from laser Ablation of Ta2O5 in Ambient O2

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