摘要
采用载流气体携带法测量了1500~1600℃范围U-Fe熔体上方Fe的蒸气分压,计算获得Fe在U熔体中的活度、活度系数及标准溶解自由能。结果显示,相对Raoult定律Fe为负偏差元素,1500和1600℃无限稀的铀熔体中Fe的活度系数γ分别为0.344和0.485,其在铀熔体中的标准溶解自由能与温度关系符合△G^0=-448 682+125.4T.
A carrier method was used to measure the dissolution equilibrium of iron vapour over liquid U-Fe alloys from 1500 to 1600 ℃,and then the activities as well as activity coefficients of iron in liquid U-Fe alloys were calculated from the results for iron.It is found that iron shows strong negative deviation from Raoult’s law,and the relationship between the standard free energy of dissolution reaction Fe（g）=[Fe]Y and temperature is △G0=-448682＋125.4T.At 1500 and 1600 ℃,the activity coefficients γ of iron at infinite dilution are 0.344 and 0.485,respectively.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第11期2793-2797,共5页
Rare Metal Materials and Engineering
关键词
U-Fe熔体
Fe分压
活度
活度系数
标准溶解自由能ΔG0
U-Fe melt
partial vapour pressure of iron
activities
activity coefficients
standard free energy of reaction ΔG0
