This work was centered on the comparative analysis of O ionic conductivity, electronic transport properties and thermal expansion of solid electrolyte ceramics, providing a brief overview of the materials having maximum potential performance in various high-temperature electrochemical devices, such as solid oxide fuel cells. Particular emphasis was focused on the O ionic conductors reported during the last 10–15 years, including derivatives of γ-Bi4V2O11 (BIMEVOX), La2Mo2O9 (LAMOX), Ln10−xSi6O26-based apatites, (Gd,Ca)2Ti2O7−δ pyrochlores and perovskite-related phases based on LaGaO3 and Ba2In2O5, in order to identify their specific features determining possible applications. The properties of the new ion-conducting phases were compared to data on well-known solid electrolytes, such as stabilized zirconia, δ-Bi2O3-based ceramics, doped ceria and LaAlO3.

Transport Properties of Solid Oxide Electrolyte Ceramics - a Brief Review. V.V.Kharton, F.M.B.Marques, A.Atkinson: Solid State Ionics, 2004, 174[1-4], 135-49