摘要
首次合成了La2/3-xLi3xMoO4系列化合物,其结构为具有阳离子缺陷的四方白钨矿结构,晶胞参数a,c及c/a值随锂离子浓度的增加而减小。锂离子掺杂浓度较低时,晶格中阳离子空位较多,Li+的传输以扩散为主;随着掺杂浓度增加,载流子浓度增大,阳离子空位减小。锂离子掺杂量在0.3附近,电导率出现最大值,室温下La0.567Li0.3MoO4的电导率为6.5×10-6S·cm-1。
A series of compounds, La 2/3- x Li 3 x MoO 4, were first prepare d. Their structures are tetragonal scheelites with the cationic defects. The cel l parameters a, c and c/a decrease with the increasing of Li + concent ration. Cationic vacancies are higher as Li + concentration is lower. The diffu sion of lithium ion preominates. The concentration of charge carriers increases with the increasing of dopant, meanwhile, cationic vacancies decrease. The cond uctivity is the best when Li + concentration is about 0.3. The conductivity o f La 0.567 Li 0.3 MoO 4 is 6.5×10 -6 S·cm -1 at the room temperature.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第4期431-434,共4页
Journal of the Chinese Society of Rare Earths
基金
河南省杰出青年科学基金(0012)
国家重点基础研究发展规划(GB199806131)资助项目
关键词
无机材料化学
稀土钼酸盐
锂离子导体
离子导电性
稀土
inorganic material chemistry
rare earth molybdate
lithium ion conductor
ionic conduction
rare earths
