Crystal structure and oxygen storage properties of BaLnMn2O5+δ (Ln: Pr, Nd, Sm, Gd, Dy, Er and Y) oxides

Alicja Klimkowicz, Konrad ͆wierczek, Akito Takasaki, Janina Molenda, Bogdan Dabrowski

研究成果: Article査読

33 被引用数 (Scopus)

抄録

In this paper we report on crystal structure and oxygen storage properties of A-site cation ordered BaLnMn2O5+δ (Ln: Pr, Nd, Sm, Gd, Dy, Er and Y) perovskite-type oxides. The materials show practically complete and reversible change between fully reduced BaLnMn2O5 and oxidized BaLnMn2O6, which occurs at moderate temperatures (300-500 °C) during changes of the oxygen partial pressure (air, 5 vol.% H2 in Ar). Based on the thermogravimetric measurements, reversible oxygen storage capacity, characteristic temperature of oxidation and reduction, as well as kinetics of these processes are given. Structural characterization was performed at room temperature for the reduced and oxidized materials by Rietveld analysis of the XRD data. These results are accompanied by in situ high temperature XRD measurements of the oxidation process, performed for BaNdMn2O5 in air.

本文言語English
ページ(範囲)116-122
ページ数7
ジャーナルMaterials Research Bulletin
65
DOI
出版ステータスPublished - 2015 5月

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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