Influences of A-site partial substitution for BaCo0.7Fe0.3O3 oxide on perovskite structure and oxygen permeability

Kinoshita K; Kusaba H; Sakai G; Shimanoe K; Miura N; Yamazoe N

Chemistry Letters, Vol.31, No.3, 344-345, 2002

Kinoshita K, Kusaba H, Sakai G, Shimanoe K, Miura N, Yamazoe N

Oxygen permeation property of A-site partially substituted barium cobaltites, A'xBa1-xCo0.7Fe0.3O3-delta (A' = Ba, Pr, Gd, Dy, Y and Yb), were examined. Substitution of Ba by Dy, Y or Yb was found to stabilize cubic perovskite structure even when x remained as small as 0.05. As a result, oxygen permeation through the disks made of these oxides appeared at temperature lower than 500degreesC, and reached fairly high levels at elevated temperature.