Li_3Zn_(0.5)SiO_4水基溶胶-凝胶法合成及其离子导电性

SYNTHESIS OF Li_3Zn_(0.5)SiO_4BY WATER_BASED SOL-GEL METHOD AND ITS IONIC CONDUCTIVITY

用水基溶胶－ 凝胶法制备了锂离子导体Ｌｉ３Ｚｎ０．５ＳｉＯ４ 的纯相． 实验中对干凝胶进行了ＴＧ－ ＤＴＡ 分析．ＸＲＤ谱结果表明形成了与高温Ｌｉ３ＰＯ４ 结构相关的Ｌｉ３Ｚｎ０．５ＳｉＯ４ 晶相．ＴＥＭ 结果则显示晶粒尺寸为５０ ｎｍ 左右． 应用交流阻抗谱技术进行了样品烧结体的电性能测试．

A new liquid source using water as a solvent was studied to prepare Li 3Zn 0.5 SiO 4 single_phase by the sol-gel method. TG-DTA methods were employed to analyze the xerogel. XRD results show that the Li 3Zn 0.5 SiO 4 is structurally related to high_Li 3PO 4 phase. TEM photographs show that the grain size of the sample annealed at 900 ℃ is about 50 nm. Ionic conductivity was determined by means of AC impedance technique. Compared with the samples by the conventional solid state reaction, the experimental results show that Li 3Zn 0.5 SiO 4 can be obtained at lower temperature.