Li3VO4-Li4SiO4-Li4GeO4赝三元系相图的研究

本文用差热分析法和高温、室温X射线衍射法对Li₃VO₄,Li₄SiO₄的相变过程,Li₃VO₄-Li₄SiO₄,Li₃O₄-Li-4GeO₄赝二元系相图以及Li₃VO₄-Li₄SiO₄-Li₄GeO₄赝三元系相图室温截面进行了研究。发现在Li₃VO₄-Li₄SiO₄,Li₃VO₄-Li₄GeO₄赝二元系中,由于Li₄SiO₄或Li₄GeO₄的加入而使Li₃VO₄的高温γ_II相稳定存在于室温,从而得到一种新的具有高电导率的锂离子导体。作者认为探寻使高温态稳定存在于室温的方法是探索新的离子导体研究中有效途径之一。 关键词：

PHASE RELATIONS IN THE PSEUDO-TERNARY SYSTEM Li3VO4-Li4SiO4-Li4GeO4

Phase transitions of Li₃VO₄, Li₄SiO₄ and isothermal section of the pseudo-ternary systems Li₃VO₄-Li₄SiO₄-Li₄GeO₄ have been investigated by means of DTA and X-ray diffra-ction techniques. It has been found that the high temperature phase of Li₃VO₄ can be stabilized to room temperature by addition of Li₄SiO₄ (or Li₄GeO₄) in Li₃VO₄-Li₄SiO₄ (or Li₃VO₄-Li₄GeO₄) binary systems. New Li⁺-conductors with high Li⁺-conductivity has been obtained. Experimental results show that stabilization of high temperature phase exhibiting high ionic conductivity could be one of the way for exploring new Li⁺-conducting materials.