Microstructure and ionic conductivity of (La1/2Li1/3+x )TiO3 perovskite-like solid solutions

Авторы: Fortalnova E.A., Safronenko M.G., Venskovskii N.U., Politova E.D., Mosunov A.V., Zhizhin M.G., Loginov B.A.
Журнал: Inorganic Materials
Том: 43
Номер: 10
Год издания: 2007
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1103
Последняя страница: 1108
DOI: 10.1134/s0020168507100135
Аннотация: The lattice parameters of (La1/2Li1/3+x)TiO3 (x = 0, 1/10, 1/6, 1/5, 1/4) ceramics have been determined as functions of temperature, and their microstructure and transport properties have been studied. The results indicate that the oxides retain orthorhombic symmetry upon the structural changes at ≃925 K. According to atomic force microscopy results, the grains in the ceramics consist of nanocrystallites 60 to 120 nm in size. Analysis of the grain bulk and grain boundary contributions to the ionic conductivity of the (La1/2Li1/3+x)TiO3 solid solutions shows that their bulk conductivity σ bulk decreases with increasing x because reducing the concentration of A-site vacancies impedes ionic transport.
Добавил в систему: Мосунов Александр Викторович

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