Structure and conductivity of B-site substituted (Li,La)TiO3

The crystal structure and the ionic and partial electronic conductivity of the LixLayMzTi1−zO3 (M = Ni, V, Cu, 0.25< x/y <1.44 and z = 0.05, 0.1, 0.2) and of the LixLayCozTi1−zO3 (0.19 ≤ x ≤ 0.55; 0.55 ≤ y ≤ 0.8 and z = 0.05, 0.10, 0.30) systems, with perovskite-related structure, have been studied. Partial substitution (5, 10 and 30%) of Ti4+ ions by slightly larger Co2+ and Ni2+ ions was found to stabilise the cubic perovskite structure (S.G. Pm3m; Co, a = 3.88450(6) Å and Ni, a = 3.8849(1) Å), with one exception (Li0.19La0.67Co0.1Ti0.9O3) giving a tetragonal symmetry plus supercell reflections.