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前人所测纯铁液中之K_(Ce_2O_2∽)及K_(Ce_2S_3)值均偏大,盖因实验方法不够完善所致,如所测之[Ce]、[O]、[S]含量均非溶解态之量。在早先制定的实验方法的基础上,本工作采用灵敏度较高的放射性测量技术,通过将试样在低温有机电解液中电解的方法,排除稀土夹杂物,测定了样中溶解态的稀土元素与硫含量,并用ZrO_2(MgO)管定氧测头测定了铁液中的氧活度,在1550～1710℃测定了纯铁液中平衡常数K_(Ce_2O_2S)、K_(Nd_2O_2S)、K_(Y_2O_2S)及K_(Ce_2S_3)与温度的关系,活度相互作用系数e_S~(Nd)及e_S~Y值。计算了Nd_2O_2S、Y_2O_2S及Ce_2S_3之标准生成自由能。
The K_ (Ce_2O_2∽) and K_ (Ce_2S_3) values in pure iron liquid measured by predecessors were both large and the cover was not perfect due to the experimental method. For example, the contents of [Ce], [O] and [S] The amount of non-dissolved state. Based on the experimental methods previously developed, this work uses highly sensitive radioactive measurement techniques to eliminate the rare earth inclusions by the method of electrolysis of the sample in low temperature organic electrolyte, and the determination of the dissolved rare earth elements and (CeO 2 S), K_ (Nd_2O_2S) and K_ (Y_2O_2S) were measured at 1550 ~ 1710 ℃ with the oxygen sensor of ZrO_2 (MgO) And the relationship between K_ (Ce_2S_3) and temperature, the interaction coefficients e_S ~ (Nd) and e_S ~ Y. The standard free energy of Nd 2 O 2 S, Y 2 O 2 S and Ce 2 S 3 were calculated.