LnCl_3/MCl熔盐体系能量不对称性(Ln=稀土元素,M=碱金属元素)

Energetic Asymmetry of LnCl_3/MCl Molten Salts(Ln= rare earth metals, M= alkali metals)

LnCl_3／MCl熔体中，库仑效应、VanderWaals效应和极化效应起着主导作用，导致溶液热力学性质相对理想溶液呈负偏差，并在XLnCl≈0．2处，形成最大有序，用扩展的似化学理论模型能较好地描述这一特点．阐述了发展新热力学模型时应考虑到次近邻粒子及诸如空穴等似离子的作用，结合熔体结构研究，探讨熔体粒子间的相互作用机理．

Coulomb interaction, polarization effect and Van der Waals interaction play a significant role,and lead to the energetic asymmetry in the LnCl3,/MCl molten salts. The negative deviation from idea solution behavior shaply increases with the mixture from LiCl to CsCl, and the short-rang maximun ordering was observed at XLnCl≈ 0.2 from KCl to CsCl. Modified quasi-chemical model is a good approximation to describethe ordering properties. However, it is more reasonable to develop new thermodynamic model, consideringthe interaction between next closed-neighbor particles and interaction between unlike ion particles.