UF_4在空气中热化学反应研究  

Thermal Chemical Reaction Activation of UF_4 in Air

作　　者：仲敬荣[1] 余春荣[1] 邓辉[1] 任一鸣[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2016年第12期3135-3139,共5页Rare Metal Materials and Engineering

基　　金：国家安全某重大基础研究项目资助

摘　　要：分别采用显微激光拉曼光谱(micro-laser Raman spectroscopy,MLRS)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)、称重及形貌观察等手段,开展了UF_4在空气中的热化学反应实验,研究不同温度时效UF_4质量、颜色及失重情况,获取反应前后不同铀化合物的Raman和XPS特征图谱。结果表明,UF4在空气中加热至200℃时,性质稳定,其拉曼光谱图基本无变化;但在250℃以上,样品表面颜色发生明显变化,Raman和XPS分析发现有UO_2、UO_2F_2、U_3O_8等多种铀化合物生成;随着温度升高,UF_4在空气中的化学反应速率呈现由快到慢的变化趋势。Thermal chemical reaction characteristics of UF4 material in air were investigated by micro-laser Raman spectroscopy（MLRS）, X-ray photoelectron spectroscopy（XPS）, weighing and morphology observation. Based on the physical and chemical properties of UF4, we have obtained the Raman and XPS spectra of different uranium compounds after heating at stated temperatures and for different time. The results indicate that UF4 sample is equivalent stable until it is heated to 200 °C in air, and its Raman spectra almost do not change. But when heated above 250 °C in air, the surface color of UF4 sample changes obviously, multiform uranium compounds are formed such as UO2, UO2F2, U3O8 from Raman and XPS analysis. On the other hand, the chemical reaction rate of UF4 in air shows a trend from fast to slow.

关 键 词：UF4 拉曼光谱(Raman) X射线光电子能谱(XPS) 化学反应 空气 

分 类 号：TL211[核科学技术—核燃料循环与材料]