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由浓差定氧和低温无水电解法研究了1500、1550、1800℃Ni液中〔Y〕-〔O〕平衡关系,测定了钇的脱氧常数1gK_(Y_2O_3)。及钇与氧的一阶活度相互作用系数与温度的关系,并进行了有关的热力学计算。给出了1500、1550、1600℃Ni液中钇的脱氧平衡图及平衡时钇活度与氧活度的关系式。对于反应脱氧常数Ni液中钇脱氧平衡时,三个下钇、氧活度的着系式、
The equilibrium relationship of [Y] - [O] in Ni solution at 1500, 1550 and 1800 ℃ was studied by concentration oxygen concentration and low temperature anhydrous electrolysis method. The deoxidation constant 1gK_ (Y_2O_3) of yttrium was determined. And the relationship between the first-order activity interaction coefficient of yttrium and oxygen and temperature, and the related thermodynamic calculations were carried out. The deoxidation equilibrium diagrams of yttrium in Ni solution at 1500, 1550 and 1600 ℃ and the relationship between yttrium activity and oxygen activity at equilibrium are given. For the reaction deoxidation constant Ni liquid yttrium deoxidation balance, the three yttrium, oxygen activity of the Department,