Electrical Properties of Ba₂(In_1xAl_x)₂O₅ Solid Solutions

N. A. Kochetova^z, I. V. Spesivtseva, and I. E. Animitsa

Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia

Received September 16, 2011

Abstract—The electric conductivity of perovskite-like Ba₂(In_1–xAl_x)₂O₅ solid solutions (0 < x 0.20) char-
acterized by structural disordering in the oxygen sublattice was studied as a function of temperature and par-
tial pressure of oxygen in an atmosphere with a low content of water vapors = 3 10^–5 atm). When In³⁺
was partially replaced by Al³⁺, the oxygen ion conductivity increased because of the disordering of oxygen
structural vacancies, leading to a significant increase in the total electric conductivity of the samples.

Keywords: brownmillerite type, oxygen structural vacancies, disordering effects, oxygen ion conductivity, elec-
tron conductivity

DOI: 10.1134/S1023193513020109

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