volume 134, issue 1, P80-88 2006
DOI: 10.1016/j.mseb.2006.07.024
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Abstract: The electrical properties of perovskite-type (La 0.3 Sr 0.7 ) 1−y CoO 3−δ (y = 0-0.03) and La 0.3 Sr 0.7 Co 0.8 M 0.2 O 3−δ (M = Al, Ga), promising parent materials of dense mixed-conducting membranes for oxygen separation, were studied in the oxygen partial pressure range from 10 −14 to 0.5 atm. The steady-state oxygen permeation fluxes through cobaltite ceramics at 973-1223 K are limited by both bulk ionic conductivity and surface exchange kinetics. The substitution of cobalt with Al 3+ or Ga 3+ increases c…

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