Li3VO4离子导体材料的合成及其离子导电性
来源期刊：中国有色金属学报2000年第4期
论文作者：宋秀芹 贾密英 陈汝芬
文章页码：591 - 595
关键词：Li3VO4； 柠檬酸盐溶胶凝胶法；固相法； 离子导电性
Key words：Li3VO4； citrate sol-gel method； solidstate reaction method； ionic conductivity
摘 要：用柠檬酸盐溶胶凝胶法和传统的固相方法分别合成了Li3VO4单相。产物的粉末和烧结体应用DTA-TG， XRD， TEM， SEM及交流阻抗谱技术进行了表征和比较。实验结果表明， 与传统的固相反应方法相比， 用柠檬酸盐溶胶凝胶法合成Li3VO4所需温度约低350 ℃， 产物的离子导电性高一个数量级。 粉体粒径在80nm以下， 在15～600℃温度范围内， 产物烧结体的离子电导率为10-8 ～10-4 S·cm-1 。
Abstract: Synthesis of Li3VO4 by the citrate sol-gel method and solid state reaction method were studied. The powder and sintered samples were characterized by DTA-TG, XRD, TEM, SEM and AC impedance technique. Compared with the samples prepared by the conventional solid state reaction, the experimental results show that the Li3VO4 with a powder diameter of 80 nm prepared by citrate sol-gel at a molar radio of metal ions to citric acid 1∶3 has higherionic conductivity; and its reaction temperature lowered about 350 ℃. The Li3VO4 pure phase is formed at over 600 ℃ by citrate solgel method and the conductivity is 10-6 ～10-4 S·cm-1 at 15 ℃ to 600 ℃.
