Oxygen Mobility in A2Ti(2-y)ZryO7 (A: Gd e Y) Ionic Conductors

K.J. Moreno Bello; G. Mendoza-Suárez; A.F. Fuentes; J. García Barriocanal; C. León; J. Santamaría. Oxygen Mobility in A2Ti(2-y)ZryO7 (A: Gd e Y) Ionic Conductors. Boletín de la Sociedad Española de Cerámica y Vidrio (ISSN: 0366-3175). 2004, Vol. 43, p. 759-2004.

We report a study of ionic conductivity in the series Y2Ti2-yZryO7 and Gd2Ti2-yZryO7 (0<y<2) obtained by mechanochemical synthesis. We present a study of oxygen ion dynamics in these materials by impedance spectroscopy. The change in dc conductivity and activation energy with Zr content is interpreted in terms of the increase in the number of oxygen vacancies and of structural disorder with increasing zr content