Thermal behaviour of La0.8Sr0.2Fe1−xGaxO3−δ (x=0 or x=0.3)

Influence of microstructure and architecture on oxygen permeation of La(1−X)SrXFe(1−Y)(Ga, Ni)YO3−δ perovskite catalytic membrane reactor

“…This slight difference between both atmospheres could be explained by the formation of oxygen vacancies at high temperature that cannot be withdrawn during cooling due to the low oxygen partial pressure. TG analysis reported in a previous work [8] confirm this behaviour.…”

Chemical expansion of La0.8Sr0.2Fe0.7Ga0.3O3–δ

“…9. Therefore, the chemical equilibrium is not governed any more solely by equation (6). This effect is also visible, for 2 x 10 -2 atm at 1500 K: the corresponding data on Fig.…”

“…Indeed, 13/26 temperature changes have a direct impact on defect reaction (6) equilibrium constant (i.e., reaction (6) is shifted to the left or to the right) whereas the diffusion modifies directly the oxygen concentration in the defect reaction (6). Consequently, as shown in Fig.…”

“…Mixed conducting oxides having a ABO 3 δ , referred to as LSFG later in the text. This material presents a good compromise between oxygen permeation fluxes and mechanical stability [4,5,6].…”

Peculiarities of layered perovskite-related GdSrFeO4 compound solid state synthesis

“…Mentioned previously difficulties are connected with thermal instability and multi-staged formation character of many from considered oxides [11][12][13][14][15][16][17]. Survey of literature on the data subject has shown the importance of mechanism and kinetics formation investigation to develop the optimal synthesis conditions of such complex compounds [18][19][20].…”