Effect of Nb^{5 +} content on the high temperature properties of the mixed conductors system La_{1 − x}Ba_xCo_{1 − y}Nb_yO_{3 − δ} with 0.6 ≤ x ≤ 1.0 and 0 ≤ y ≤ 0

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• 作者：C. Setevich^a ; ^b ; ^{cristian.martinez.setevich@gmail.com} ; L. Toscani^c ; S. Larrondo^c ; ^d ; F. Prado^a ; A. Caneiro^b
• 关键词：Perovskites ; Cobaltites ; Oxide mixed conductors ; Nb-doping ; Crystal structure stability ; Thermal expansion ; impedance spectroscopy
• 刊名：Solid State Ionics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：300
• 期：Complete
• 页码：140-148
• 全文大小：1495 K
• 卷排序：300

文摘

The replacement of Co by Nb in the La1 − xBaxCo1 − yNbyO3 − δ (0.6 ≤ x ≤ 1.0) system stabilizes the cubic perovskite. For a fixed Ba content, the incorporation of Nb5+ depress the oxygen permeation flux, ORR, σ and the TEC values. The minimum polarization resistance value was 0.08 Ω cm2, at 600 °C, in air, for La0.2Ba0.8Co0.9Nb0.1O3 − δ.