摘要
本文采用铜液与反应产物直接平衡法,并用固体电解质氧浓差电池和低温无水电解分离反应产物等技术,在1200℃研究了Cu—Ce-O,Cu—Ce-S,Cu—Ce-O—S溶液体系热力学得到了铜液中铈的脱氧、脱硫,脱硫氧常数和平衡产物Ce_2O_3,CeS,Ce_2O_2S的Gibbs标准生成自由能,Ce与S的活度相互作用系数以及Ce的标准溶解自由能和自作用系数与温度的关系式绘制了铜液中[Ce]-[S]-[O]平面沉淀图,确定了铜液中Ce_2O_3,CeS,Ce_2O_2S稳定存在的热力学条件。
Thermodynamics of Cu-Ce-O, Cu-Ce-S and Cu-Ce-O-S solutions at
1200℃ were studied by using solid electrolyte cell and chemical equilibrium method.
The equilibrium constants of deoxidation, desulfurization and deoxysulfurization by Ce,
the Gibbs standard free energies of the formation of Ce_2O_3, CeS, Ce_2O_2S in Cu-base
solution, activity interaction coefficients of S and Ce, temperature dependence of stand-
ard free energy of solution of Ce in Cu and the self-interaction coefficients of Ce in liq-
uid Cu have been obtained. The phase precipitation diagram for Cu-Ce-S-O system
has been plotted. The steady thermodynamic condition of the existence of Ce_2O_3, CeS
and Ce_2O_2S in liquid Cu has been determined.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第7期B316-B322,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
铈
氧
硫
铜液
热力学性质
沉淀图
Ce
O
S
Cu liquid
thermodynamical property
phase diagram
