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,为预测Ce的夹杂物生成的先后次序及类型提供了理论依据
Thermodynamics of Cu-Ce-O, Cu-Ce-S and Cu-Ce-O-S solutions at1200℃ 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-basesolution, 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 systemhas been plotted. The steady thermodynamic condition of the existence of Ce_2O_3, CeSand Ce_2O_2S in liquid Cu has been determined.
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| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] |
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