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本文是关于元素铀的热力学性质的调查研究总结。内容包括有:1.固态铀的低温(<273°K)热力学函数;2.固态铀的高温(>273°K)热力学函数;3.气态液态铀的热力学函数;4.铀的固态相变温度和相变热,熔化温度和熔化热;5.铀的蒸气压和蒸发(升华)热;6.单元系铀的热力学相图。本文总结和评述了迄今所发表的有关结果和数据,讨论了它们的精确度。基于最可信赖的数据,对各热力学数据作了重新统一的整理,并补充了一部分计算以求基本上的完整性。根据整理计算所得数据,讨论了铀的热力学性质的一些特征,绘制了单元系铀的自由能函数曲线和热力学相图。
This article is a survey of the thermodynamic properties of elemental uranium. The contents include: 1. The low temperature (<273 ° K) thermodynamic function of solid uranium; 2. The high temperature (> 273 ° K) thermodynamic function of solid uranium; 3. The thermodynamic function of gaseous uranium; 4. The solid phase transition of uranium Temperature and phase change heat, melting temperature and melting heat; 5. Uranium vapor pressure and evaporation (sublimation) heat; 6. Unit of uranium thermodynamic phase diagram. This article summarizes and comments on the results and data published so far, and discusses their accuracy. Based on the most reliable data, the thermodynamic data are reorganized and some calculations are supplemented for the sake of completeness. According to the data of finishing calculation, some characteristics of thermodynamic properties of uranium are discussed, and the free energy function curve and thermodynamic phase diagram of uranium unit are plotted.