由低温无水电解稀土夹杂物和固体电解质定氧活度测得Ni液中Ce_2O_3,CeS及Ce_2O_2S生成反应的平衡常数,由此可得: △G°_(Ce_2O_3)=-116240+315.8 T △G°_(Ces)=-570280+220.1 T △G°_(Ce_2O_2S)=-984850+238.5 T 由实验测得数据经热力学分析计算得到1600℃Ni液中a_O-a_S平衡图,为理论上预测夹杂物生成的先后次序及类型提供了依据。
Reaction constants of the formation of Ce_2O_3, CeS and Ce_2O_2S in liquid Ni at 1500 to 1600℃ have been determined, then the standard Gibbs energies (J·mol) were obtained: △G°_(Ce_2O_3)=-116240+315.8 T △G°_(Ces)=-570280+220.1 T △G°_(Ce_2O_2S)=-984850+238.5 T The reaction coefficients e_O~(Ce) and e_S~(Ce) have also be determined: e_O~(Ce)=-333451/T+149.7 e_S~(Ce)=-276228/T+146.0 The equilibrium phase diagram of a_o-a_s for Ni-Ce-S-O system at 1600℃ was also given.
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