(河北師范大學(xué) 化學(xué)系， 石家莊 050016)
摘 要: 用檸檬酸鹽溶膠凝膠法和傳統(tǒng)的固相方法分別合成了Li3VO4單相。產(chǎn)物的粉末和燒結(jié)體應(yīng)用DTATG， XRD， TEM， SEM及交流阻抗譜技術(shù)進行了表征和比較。實驗結(jié)果表明， 與傳統(tǒng)的固相反應(yīng)方法相比， 用檸檬酸鹽溶膠凝膠法合成Li3VO4所需溫度約低350 ℃， 產(chǎn)物的離子導(dǎo)電性高一個數(shù)量級。 粉體粒徑在80nm以下， 在15～600℃溫度范圍內(nèi)， 產(chǎn)物燒結(jié)體的離子電導(dǎo)率為10-8 ～10-4 S·cm-1 。
關(guān)鍵字: Li3VO4； 檸檬酸鹽溶膠凝膠法；固相法； 離子導(dǎo)電性
（Department of Chemistry, Hebei Normal University, Shijiazhuang 050016, P.R.China）
Abstract:Synthesis of Li3VO4 by the citrate solgel method and solid state reaction method were studied. The powder and sintered samples were characterized by DTATG, 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 solgel 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 ℃.
Key words: Li3VO4； citrate solgel method； solidstate reaction method； ionic conductivity
