中文摘要：

离子电导率(在房间温度) nano-LaF3 疏松物质和增加的再发现的现象，谷物边界松驰引起的离子电导率由震惊的交流(交流电(流)) 激活被报导。有 16.7 nm 的平均谷物尺寸的 LaF_3 的 Nano 水晶的粉末从水溶液与直接降水的一个方法被综合。LaF_3 nano 水晶的粉末的粒子尺寸和形状被 XRD 分析， TEM.Nano-LaF_3 疏松物质被在房间温度和 10 ~ 的真空压缩粉末到 1 GPa 准备(-4)Pa。nano-LaF_3 疏松物质的离子电导率在房间温度与复杂阻抗系列被学习。nano-LaF3 疏松物质的离子电导率(10 ~( 在房间温度的 -5)S/cm) 显著地与单个水晶 LaF_3 的相比被增加(10 ~(-6) S/cm ) 。特殊现象第一次被观察离子电导率与扫描时间的交流逐渐地增加。

英文摘要：

The ionic conductivity （at room temperature） of nano-LaF3 bulk material and a new discovered phenomenon of increasing ionic conductivity caused by grain boundary relaxation activated by AC （alternating current） shocking were reported. Nano-crystalline powder of LaF3 with average grain size of 16.7 nm was synthesized with a method of direct precipitation from aqueous solution. Particle size and shape of LaF3 nano-crystalline powder were analyzed by XRD and TEM. Nano-LaF3 bulk material was prepared by compacting the powder to 1 GPa at room temperature and vacuum of 10^-4 Pa. The ionic conductivity of nano-LaF3 bulk material was studied with complex impedance spectra at room temperature. The ionic conductivity of nano-LaF3 bulk material （10^-5 S/cm） at room temperature is significantly increased compared with that of single crystal LaF3 （10^-6 S/cm）. A special phenomenon is observed for the first time that the ionic conductivity increases gradually with AC scanning times.