Citation: ZHONG Jing-Rong, SHAO Lang, YU Chun-Rong, REN Yi-Ming. Study of Thermal Chemical Reactio[J]. Acta Physico-Chimica Sinica, ;2015, 31(S1): 25-31. doi: 10.3866/PKU.WHXB2014Ac08 shu

Study of Thermal Chemical Reactio

1.
China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China

Corresponding author: REN Yi-Ming,
Fund Project: 中国工程物理研究院科学技术发展基金(2014B0301050)资助项目 (2014B0301050)

We have preliminarily developed the experimental study of UF₄ and its thermal chemical reaction characteristics in environmental atmospheres such as air, O₂, and hydrated O₂. Various analytical techniques such as micro-laser Raman spectroscopy (MLRS), X-ray photoelectron spectroscopy (XPS), and metallography were used. Based on the physical and chemical properties of UF₄, we obtained the Raman and XPS spectra of different uranium compounds after heating at specific temperatures for specific times. The experimental results indicate that UF₄ is stable up to 200 ℃ in various atmospheres. Raman spectra were almost unchanged. However, above 250 ℃, the surface color of UF₄ changed significantly. Raman spectrum and XPS analyses showed that a variety of uranium compounds such as UO₂, UO₂F₂, and U₃O₈ were formed. In this work, we calculated the apparent activation energies of the reactions of UF₄ with active gases in the environment, and studied the relationship between the reaction rate and temperature in detail.
- UF₄,
- Raman spectroscopy,
- X-ray photoelectron spectroscopy,
- Chemical reaction,
- Environmental atmosphere
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