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采用柠檬酸盐溶胶 -凝胶法合成了组成为 Li Zn(P1- x Vx) O4 (x=0 ,0 .1 ,0 .2 ,0 .3,0 .4,0 .5)的离子导体 ,并对合成材料进行了差示热分析 (DTA)、热重分析 (TG)、X射线衍射 (XRD)和透射电镜 (TEM)等表征。实验结果表明 ,组成为 Li Zn PO4 的烧结体结构为 α- L i Zn PO4 ;x=0 .4,0 .5的烧结体具有 Li Zn VO4 结构 ,为固溶体 (Li Zn VO4 )单相 ;而 x=0 .1 ,0 .2 ,0 .3的烧结体是由 α- Li Zn PO4 和 Li Zn VO4 两相组成的。由于 α- Li Zn PO4 烧结体的相对密度极小 ,样品在室温下几乎不显示导电性 ;而掺杂了 V以后的样品 ,随着结构和组成不同显示出不同程度的导电性 ,其中以 x=0 .4时值最大 ,T=30℃时 σ=4.55× 1 0 - 7S· cm- 1。
The ion conductor with the composition of Li Zn (P1-x Vx) O4 (x = 0,0.1,0.2,0.3,0 .4,0.5) was synthesized by the citrate sol-gel method The thermogravimetry (DTA), thermogravimetric analysis (TG), X - ray diffraction (XRD) and transmission electron microscopy (TEM) were used to characterize the composites. The experimental results show that the structure of LiZnPO4 sintered body is α-L i Zn PO4; the sintered body of x = 0.4, 0.5 has Li Zn VO4 structure and is single phase of solid solution (Li Zn VO4) The sintered body of x = 0.1, 0.2, 0.3 is composed of two phases of α-Li Zn PO 4 and Li Zn VO 4. Due to the relative density of the α-Li Zn PO4 sintered body is extremely small, the sample shows almost no conductivity at room temperature; the sample doped with V shows different degrees of conductivity with the structure and composition, in which x = 0.4 when the maximum value, T = 30 ℃ σ = 4.55 × 10-7S · cm-1.