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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液中钇的脱硫氧常数与温度的关系:lgKr_2o_2s=-(33146)/T+3.85,(1500-1600℃)钇的硫氧化物在Ni液中的标准生成自由能与温度的关系:2[Y]+2[O]+[S]=Y_2O_2S_(s),(1500—1600℃)△G°=151640+17.61T(cal/mol)=-634460+73.69T(J/mol)由实验测得数据经热力学分析计算得到1600℃Ni液中[Y]-[S]-[O]平衡立体图及α_o-α_s平衡相图,为理论上预测夹杂物生成的先后次序及类型提供了依据.并给出了Ni液中加钇控制夹杂物形态公式,钇的加入量与氧,硫含量之间的函数关系.
The relationship between the desulfurization oxygen constant of yttrium in Ni solution and temperature as measured by the determination of the fixed oxygen activity of rare earth inclusions and solid electrolytes in low temperature anhydrous electrolytes: lgKr_2o_2s = - (33146) /T+3.85, (1500-1600 ° C) The relationship between the standard free energy of formation of oxides and the temperature in Ni solution is as follows: 2 [Y] +2 [O] + [S] = Y 2 O 2 S s, 1500-1600 ° C G ° = 151640 + 17.61 T cal / mol) = - 634460 + 73.69T (J / mol) From the experimental data obtained by the thermodynamic analysis calculated 1600 ° C Ni solution of [Y] - [S] - [O] equilibrium diagram and α_o-α_s equilibrium phase diagram , Which provides a theoretical basis for predicting the order and type of inclusions theoretically.Furthermore, the formula of yttrium control inclusions in Ni solution is given, and the relationship between the addition amount of yttrium and oxygen and sulfur contents is given.