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

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• 作者：Stramare ; S. ; Weppner ; W.
• 关键词：Perovskites ; Lithium lanthanum titanate ; Electrical conductivity
• 刊名：Materials Science and Engineering: B
• 出版年：2004
• 出版时间：October 15, 2004
• 年：2004
• 卷：113
• 期：1
• 页码：85-90
• 全文大小：171 K

文摘

The crystal structure and the ionic and partial electronic conductivity of the Li_xLa_yM_zTi_1−zO₃ (M = Ni, V, Cu, 0.25< x/y <1.44 and z = 0.05, 0.1, 0.2) and of the Li_xLa_yCo_zTi_1−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 (Li_0.19La_0.67Co_0.1Ti_0.9O₃) giving a tetragonal symmetry plus supercell reflections.