Cu-O溶液体系的热力学研究

来源期刊：中国有色金属学报1999年第2期

论文作者：杜挺 孙运yong

文章页码：377 - 380

关键词：Cu-O系 平衡 热力学

Key words：Cu-O liquid system ; equilibrium; thermodynamic

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： lnγ_O=-3135/T， ΔＧs=-26068-26.82T J/mol; ε_O=-7350/T; ｅ_O=-127/T。

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: lnγ_O＝-3135/T; ΔＧ_s(1%)＝-26068-26.82T J/mol; ε_O＝-7 350/T; ｅ_O＝-127/T.