Recent Developments in Oxide Ion Conductors: Aurivillius Phases

Recent advances in the study of Aurivillius phases (Bi 2 A n -1 B n O 3 n +3, n = 1−5) as oxide ion conductors are presented. The structures of modified Aurivillius phases containing extrinsic oxygen vacancies as well as Aurivillius phases containing intrinsic oxygen vacancies are surveyed. A detailed discussion of the conductivity behavior of these Aurivillius phases is given.