Thermodynamics and Phase Equilibria for Ce,Y in the Presence of O,S in Ni-base Solutions
来源期刊：Journal of Rare Earths1993年第1期
论文作者：杜挺 王龙妹 刘爱生 吴夜明 张玉清
文章页码：25 - 27
摘 要：<正> The deoxidation,desulfuration,deoxysulfuration constants and the standard Gibbs energies(inJ mol-1)of formation of the following rare earth compounds as the equilibrium phases in Ni-base solutionsare given:Ce2O3:lgK=-（6.0729×104/T）+16.50 △G0=-1.162460×106+315.84TCe2O2S:lgK=-（5.1450×104/T）+12.46 △G0=-9.84850×105+238.50TCe2S3:lgK=-（7.2232×104/T）+27.98 △G0=-1.382600×106+535.55TY2O3:lgK=-（4.2572×104/T）+7.74 △G0=-8.14920×105+148.16TY2O2S:lgK=-（3.3146×104/T）+3.85 △G0=-6.34460×105+73.72TY2S3:lgK=-（1.22487×105/T）+55.78 △G0=-2.344630×100+1067.76TInteraction coefficients between Ce.Y and O are also given:eo?=-（3.33451×105/T）+149.7 eO?=-（1.63437×105/T）+71.8The phase equilibria for Ni-Ce-S-O and Ni-Y-S-O solutions at 1600℃ provide the basis for pre-dicting the sequence and type of Ce and Y equilibrium phases formed in Ni-base solutions.The formulascontrolling the morphology of inclusion formed in liquid Ni by Ce or Y addition are also given.
杜挺，王龙妹，刘爱生，吴夜明，张玉清
摘 要：<正> The deoxidation,desulfuration,deoxysulfuration constants and the standard Gibbs energies(inJ mol-1)of formation of the following rare earth compounds as the equilibrium phases in Ni-base solutionsare given:Ce2O3:lgK=-（6.0729×104/T）+16.50 △G0=-1.162460×106+315.84TCe2O2S:lgK=-（5.1450×104/T）+12.46 △G0=-9.84850×105+238.50TCe2S3:lgK=-（7.2232×104/T）+27.98 △G0=-1.382600×106+535.55TY2O3:lgK=-（4.2572×104/T）+7.74 △G0=-8.14920×105+148.16TY2O2S:lgK=-（3.3146×104/T）+3.85 △G0=-6.34460×105+73.72TY2S3:lgK=-（1.22487×105/T）+55.78 △G0=-2.344630×100+1067.76TInteraction coefficients between Ce.Y and O are also given:eo?=-（3.33451×105/T）+149.7 eO?=-（1.63437×105/T）+71.8The phase equilibria for Ni-Ce-S-O and Ni-Y-S-O solutions at 1600℃ provide the basis for pre-dicting the sequence and type of Ce and Y equilibrium phases formed in Ni-base solutions.The formulascontrolling the morphology of inclusion formed in liquid Ni by Ce or Y addition are also given.
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