Oxygen desorption/absorption behavior of In-substituted BaFeO3−δ [BaFe1−xInxO3−δ] was evaluated using thermogravimetry, high-temperature X-ray diffraction, and iodometry. By In substitution of 10% into BaFeO3−δ with ordered distribution of oxide ion vacancy, the structural change to cubic perovskite structure occurred, accompanied by the rearrangement of oxide ion vacancy in random and by the increase in the average valence of Fe ions. The amount of desorbed oxygen per Fe ion was enhanced by only 10% In substitution, which could be attributed to the random distribution of oxide ion vacancies. Among the In-substituted specimens with almost constant valence of Fe ion, BaFe0.9In0.1O3−δ with the highest value of Fe content exhibited the largest amount of desorbed oxygen from the lattice, indicating that this material could be regarded as a promising candidate for oxygen storage materials.

中文翻译：

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通过 In 取代 Fe 位点增强 BaFe1− x In x O3−δ 的氧解吸/吸收性能

使用热重法、高温 X 射线衍射和碘量法评估 In 取代的 BaFeO3-δ [BaFe1-xInxO3-δ] 的氧解吸/吸收行为。通过将10%的BaFeO3-δ置换为有序分布的氧化物离子空位，结构转变为立方钙钛矿结构，伴随着氧化物离子空位的随机重排和Fe离子平均价态的增加。每个Fe离子的解吸氧量仅增加了10%的In取代，这可能归因于氧化物离子空位的随机分布。在 Fe 离子价数几乎恒定的 In 取代样品中，Fe 含量最高的 BaFe0.9In0.1O3-δ 表现出从晶格中解吸的氧量最大，