材料期刊网

以LiTi2(PO4)3为基以天然高岭石为起始原料，经高温固相反应(9501150C)制得了一系列锂快离子导体材料Li1+2x+yAlxYbyTi2-x-ySixP3-xO12(以下简称Al-Yb-Lisicon). 系统的合成温度随x和y值的增大而降低. 应用交流阻抗技术测定的电导率数据结果表明y=0.3，x=0.1的合成物的电导率最好，400C时电导率达2.4510-2S/cm，200400C内的电导激活能为38.3kJ/mol. XRD分析结果表明在y=0.3，x0.4及y=0.5，x0.3的组成范围内均能得到空间群为R3c的合成物.

Refined natural kaolinite was used as a starting material for preparing new lithium fast ion conductors of Li1+2x+yAlxYbyTi2-x-ySixP3-xO12 system by high temperature (9501150C) solid phase reaction for about 20h. The syntheses temperatures are lowered with increasing the value of x and y for the system. The X-ray powder diffraction shows that a Lisicon phase with R3c space group exists in the composition range of y=0.3, x0.4 and y=0.5, x0.3. The initial composition with y=0.3, x=0.1 possesses a maximum ionic conductivity of 2.4510-2S/cm at 673K and its activation energy is 38.3kJ/mol in the temperature range of 473673K.