Author/Authors :
Ishihara، نويسنده , , Tatsumi and Ishikawa، نويسنده , , Shinji and Furuno، نويسنده , , Tetsuro and Yu، نويسنده , , Chunying and Ando، نويسنده , , Masaki and Nishiguchi، نويسنده , , Hiroyasu and Takita، نويسنده , , Yusaku، نويسنده ,
Abstract :
Partial electronic and oxide ion conductivity in La0.7Sr0.3Ga0.6Fe0.4O3 (LSGF) was investigated in this study by the ion blocking method. It was seen that LSGF stably exhibits the electronic hole conduction over wide oxygen partial pressure. The estimated oxide ion conductivity decreased with decreasing PO2 and this seem to be caused by decreasing amount of VO¨ which is balanced with Fe valence number. The estimated transport number of oxide ion is reasonably agreed with those estimated by oxygen concentration cell. It was found that the theoretical oxygen permeation rate in LSGF is much larger than that of observed value. Therefore, it is expected that the oxygen permeation rate could be improved by increasing activity of surface catalyst.
Keywords :
Mixed conductor , LaGaO3 perovskite oxide , Ion blocking methods , Fe dope
