An X-ray diffraction, transmission electron microscopic and secondary ion mass spectrometric study was made of the microscopic features of Li0.5La0.5TiO3; which exhibited Li ionic conductivities as high as 0.001S/cm at room temperature. It was found that a superstructure was produced by the ordering of La3+ and vacancies. This ordering was regular at the microscopic scale, but became irregular at the macroscopic scale. The Li+ exhibited a random distribution which met the requirements of fast ionic conduction. A second phase, Li2TiO3, was present at the grain boundary junctions.

The Microscopic Features of (Li,La)TiO3. H.T.Chung, D.S.Cheong: Solid State Ionics, 1999, 120[1-4], 197-204