稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
4期
498-500
,共3页
inorganic chemistry%mineral fast ion conductor%kaolinite%Nasicon-like structure%rare earths
Rare earth mineral fast ion conductors of Li1+2x+3yAlxScyZnyTi2-x-2ySixP3-xO12 system based on LiTi2(PO4)3 were prepared by solid phase reaction at high temperature (1000～1300 ℃) for about 30 h using refined natural kaolinite and Sc2O3. The X-ray diffraction analysis shows that a Nasicon-like structure with R3c space group can be found in the composition range of x=0.1, 0.2, y≤0.2. The maximum lithium ion conductivity is 1.19×10-4 S*cm-1 for the composition with x=0.1, y=0.08 at room temperature, and its activation energy is 30.6 kJ*mol-1 in the temperature range of 150～300 ℃. The systems with these compositions have high conductivity of about 10-2 S*cm-1 at 300 ℃.
