Abstract Perovskite-type BaFe0.9In0.1O3−δ (BFI010) with random distribution of oxide ion vacancy was prepared by Pechini method with sintering under O2 flow (BFI010-O2) and N2 flow (BFI010-N2). Although crystal structures of the obtained specimens could be explained as the same cubic perovskite, the large variation in oxide ion vacancy content δ was observed between these specimens. Relationship between chemical state of Fe ions and δ was evaluated using Mossbauer spectroscopy at room temperature. It was revealed that valence of Fe was mixture of Fe3+ with isomer shift, I.S., of 0.260 mm/s and Fe4+ with I.S. of −0.073 mm/s with paramagnetic property in BFI010-O2. Mossbauer spectrum of BFI010-N2 could be explained that only Fe3+ with antiferromagnetic interaction existed, indicating different phases could be obtained by variation of δ in BaFe0.9In0.1O3−δ in spite of the same cubic crystal structure. It was concluded that oxygen storage phenomenon due to redox variation of Fe ions occurred between the two different phases without variation of crystal structure.

中文翻译：

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使用穆斯堡尔光谱法通过改变 BaFe 0.9 In 0.1 O 3− δ 作为储氧材料中的氧化物离子含量来分析相变——发现保持立方结构的磁性相变

摘要 采用Pechini法在O2流（BFI010-O2）和N2流（BFI010-N2）下烧结，制备了氧化物离子空位随机分布的钙钛矿型BaFe0.9In0.1O3-δ（BFI010）。尽管所得样品的晶体结构可以解释为相同的立方钙钛矿，但在这些样品之间观察到氧化物离子空位含量δ的较大变化。在室温下使用穆斯堡尔光谱评估 Fe 离子的化学状态与 δ 之间的关系。结果表明，在 BFI010-O2 中，Fe 的化合价是异构体位移 IS 为 0.260 mm/s 的 Fe3+ 和 IS 为 -0.073 mm/s 的 Fe4+ 的混合物，具有顺磁性。BFI010-N2 的穆斯堡尔谱可以解释为仅存在具有反铁磁相互作用的 Fe3+，表明通过改变 BaFe0.9In0 中的 δ 可以获得不同的相。尽管具有相同的立方晶体结构，但 1O3-δ。可以得出结论，由于铁离子氧化还原变化引起的储氧现象发生在两个不同的相之间，而晶体结构没有变化。