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- W1520233633 abstract "The mixed conductivity and oxygen permeation properties of Pr-deficient Pr 1.9 Ni 0.71 Cu 0.24 M 0.05 O 4+δ (M = In,Ga,Al,Ni) were investigated. Among the dopants studied, the Ga-doped membrane was a superior mixed conductor, and it exhibited a high oxygen permeation rate compared with that of the other compositions. Examinations of membranes with different Ga concentrations revealed that the A-site cation-deficient composition, Pr 1.9 Ni 0.71 Cu 0.24 Ga 0.05 O 4+δ , had the highest permeability of 286 μmol min ―1 cm ―2 (ca. 7 cm 3 min ―1 cm ―2 ) from air to He at 1273 K in a 0.5 mm thick membrane. The oxygen permeation rate of Pr 1.9 Ni 0.71 Cu 0.24 Ga 0.05 O 4+δ decreased with thickness, indicating that the limiting factor is oxygen diffusivity in bulk. The Seebeck coefficient and oxygen permeation measurements suggest that the Ga dopant and Pr deficiency decreased the charge carrier density and improved the oxide ion conductivity. The estimated oxide ion conductivity in this material is a few times higher than that of the conventional mixed conductors such as Co-based perovskite." @default.
- W1520233633 created "2016-06-24" @default.
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- W1520233633 date "2010-01-01" @default.
- W1520233633 modified "2023-10-05" @default.
- W1520233633 title "Mixed Oxide Ion and Hole Conductivity in Pr[sub 2−α]Ni[sub 0.76−x]Cu[sub 0.24]Ga[sub x]O[sub 4+δ] Membrane" @default.
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- W1520233633 doi "https://doi.org/10.1149/1.3251004" @default.
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