(钢铁研究总院， 北京100081)
摘 要: 采用ZrO2(MgO)固体电解质浓差电池测定了铜液中氧的活度，选用Ni/NiO为参比电极，研究Cu-O系的平衡，铜液中与溶解氧反应的平衡产物经测定为Cu2O。 获得了铜液中氧的活度、氧的活度系数、氧的标准吉布斯自由能、氧的自相互作用系数与温度的关系式分别为： lnγO=-3135/T， ΔＧs=-26068-26.82T J/mol; εO=-7350/T; ｅO=-127/T。
关键字: Cu-O系 平衡 热力学
（Central Iron and Steel Research Institute, Beijing 100081, P. R. China）
Abstract:The oxygen activities in Cu-O liquid system were measured with ZrO2(MgO) sensors. The form of cell is Mo|Ni, NiO||ZrO2(MgO)||[O]Cu|Mo. The equilibrium reaction is 2Cu(l)+[O]Cu=2Cu2O(s). The activity coefficient of oxygen, the Gibbs standard free energy of solution of ［1%O］, the self-interaction coefficient of oxygen as a function of temperature in Cu-O liquid solution were given as follows: lnγO＝-3135/T; ΔＧs(1%)＝-26068-26.82T J/mol; εO＝-7 350/T; ｅO＝-127/T.
Key words: Cu-O liquid system equilibrium thermodynamic
