Relationship between oxygen desorption and the reduction features of Mn and Fe in perovskite-type SrFe1-xMnxO3-δ

被引：10

作者：

Fujishiro, Fumito ^{[1
]}

Oshima, Natsumi ^{[1
]}

Kamioka, Nanako ^{[1
]}

Sakuragi, Tokio ^{[2
]}

Oishi, Masatsugu ^{[2
]}

机构：

[1] Kochi Univ, Fac Sci & Technol, 2-5-1 Akebono Cho, Kochi, Kochi 7808520, Japan

[2] Tokushima Univ, Grad Sch Technol Ind & Social Sci, 2-1 Minami Josanjima, Tokushima, Tokushima 7708506, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2020年 / 283卷

基金：

日本学术振兴会;

关键词：

Oxygen desorption; Thermogravimetry; Reduction; Manganese; Iron; Perovskite; ELECTRICAL-CONDUCTIVITY; CRYSTAL-STRUCTURE; STORAGE CAPACITY; SORPTION/DESORPTION; PERMEABILITY; STABILITY; LA;

D O I：

10.1016/j.jssc.2019.121152

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Perovskite-type (ABO(3)) SrFe1-xMnxO3-delta specimens (0.1 <= x <= 0.6) were prepared via the Pechini method. The Mn and Fe valences were determined by means of X-ray absorption fine structure spectroscopy and iodometry, and the average B valences and oxygen contents (3-delta) were calculated from the obtained valences. In perovskite SrFe(1-x)Mn(x)O(3-delta )pecimens, it was found that oxide ion vacancies existed on several octahedra. Thermogravimetry showed that the degree of oxygen desorption increased upon increasing the temperature but decreased at higher Mn contents, thereby indicating that Mn ions were not reduced in the obtained cubic perovskite phase. It was therefore considered that Fe ions were more easily reduced, and that the crystal structure was stable during oxygen desorption, thereby suppressing the reduction of Mn ions in the B-site mixed perovskite-type SrFe1-xMnxO3-delta.

引用

页数：5

共 33 条

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