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本文用差热分析法和高温、室温X射线衍射法对Li_3VO_4,Li_4SiO_4的相变过程,Li_3VO_4-Li_4SiO_4,Li_3O_4-Li-4GeO_4赝二元系相图以及Li_3VO_4-Li_4SiO_4-Li_4GeO_4赝三元系相图室温截面进行了研究。发现在Li_3VO_4-Li_4SiO_4,Li_3VO_4-Li_4GeO_4赝二元系中,由于Li_4SiO_4或Li_4GeO_4的加入而使Li_3VO_4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。
In this paper, the phase transitions of Li 3 VO 4 and Li 4 SiO 4, the phase diagrams of Li 3 VO 4-Li 4 SiO 4, Li 3 O 4-Li 4 GeO 4 pseudophantics and the phase diagram of Li 3 VO 4 Li 4 SiO 4 Li 4 GeO 4 pseudo-ternary system by differential thermal analysis and high temperature and room temperature X-ray diffraction Room temperature section was studied. It is found that the high temperature γ - (II) phase of Li 3 VO 4 is stably present at room temperature due to the addition of Li 4 SiO 4 or Li 4 GeO 4 in the Li 3 VO 4-Li 4 O 4 -SiO 4 and Li 3 VO 4-Li 4 GeO 4 pseudobinary systems, resulting in a novel lithium ion conductor with high conductivity . The author believes that exploring ways to stabilize the high-temperature state at room temperature is one of the effective ways to explore the new ionic conductor.