Phase relationship and electrical conductivity of the system Li1+xGe2-xAlxP3O12 were studied.A good host compound LiGe2P3O12 was found. Solid solution with R3c structure can be formed in the range 04+ with Al3+ in LiGe2P3O12, and then an unknown phase appeared at x>0.6. The conductivity increased rapidly when Ge4+ was substituted by a small amount of Al3+(x=0.1). The conductivity increased with the increase of content of A13+ and reached a maximum at x = 0.5. The conductivities of Li1.5Ge1.5Al0.5P3O12 equal to 3.5×10-5, 1×l0-2 and 3.1×10-2 S cm-1 at room temperature, 300℃ and 450℃ respectivily. Activation energy of conduction is 0.33 eV, electron transfer number is about 10-5.
下载:
