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本实验采用ZrO_2(MgO)固体电解质氧浓差电池直接测定氧的活度,用放射性测量技术及低温无水电解分离夹杂的方法,考察了电解分离过程中La_2O_2S的稳定性并测定了铁液中溶解态的La含量,对实验数据用平衡值外推法处理得到: 1550℃ K_(La_2O_2S)=3.81×10~(-19) e_S~(La)=-4.1 1600℃ K_(Li_2O_2S)=6.45×10~(-19) e_S~(La)=-4.8 1650℃ K_(Li_2O_2S)=7.41×10~(-19) e_S~(La)=-4.2 La_((1))=[La] △G_(sol)~0=-136700+59.82T,γ_(La)~0=0.33(1873K) 实验结果表明La具有比Ce,Nd,Y更强的脱硫氧能力。
In this experiment, the activity of oxygen was measured directly using ZrO2 (MgO) solid electrolyte oxygen concentration cell. The stability of La2Os during electrolysis and separation was examined by radioactive measurement and low temperature non-aqueous electrolysis. The content of La in the dissolved state was calculated by the extrapolation of the equilibrium values for the experimental data: 1550 ℃ K_ (La_2O_2S) = 3.81 × 10 ~ (-19) e_S ~ (La) = 4.1 1600 ℃ K_ (Li_2O_2S) = 6.45 × 10 ~ -19 e_S ~ La = - 4.8 1650 ℃ K_ (Li_2O_2S) = 7.41 × 10 ~ (-19) e_S ~ (La) = 4.2 La_ (1) = [La] △ G_ The results show that La has more desulfurization ability than Ce, Nd, Y.