論文

査読有り
2013年11月

Distribution change of oxygen vacancies in layered perovskite type(Sr, La)(n+) iFenO3n+1 (n=3)

JOURNAL OF SOLID STATE CHEMISTRY
  • Isao Kagomiya
  • ,
  • Keigo Jimbo
  • ,
  • Ken-ichi Kakimoto

207
開始ページ
184
終了ページ
189
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jssc.2013.08.030
出版者・発行元
ACADEMIC PRESS INC ELSEVIER SCIENCE

To elucidate characteristic oxygen vacancy formation in layered perovskite (Sr, La)(n+1)Fe O-n(3n+1) With the perovskite layer number: n=3, oxygen vacancy content delta of the (Sr0.775La0.225)(4)Fe3O10-delta (SLF4310) was investigated using a titration technique and a thermogravimetric analysis. The equilibrium constant K for the reduction reaction: Oo(x) +2Fe(Fe)(center dot) (Fe4+)=1/2O(2)+Vo(center dot center dot) +2Fe(Fe) (x) (Fe3+) was estimated using the vacancy content delta. The Arrhenius plot of the K reveals slope change at approximately 775 degrees C. From the Rietveld analysis, the oxygen vacancies are the most remarkable at the O2 (O4) sites at lower (higher) temperatures than about 800 degrees C, which temperature is approximately comparable with that of slope change in the K. These facts mean that distribution of vacancy sites in the SLF4310 changes at approximately 775 degrees C, accompanying no structural phase transition. The vacancy distribution change affects to the ion conductivity of the SLF4310. (C) 2013 Elsevier Inc. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.jssc.2013.08.030
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000326850200027&DestApp=WOS_CPL
URL
http://id.nii.ac.jp/1476/00006188/
ID情報
  • DOI : 10.1016/j.jssc.2013.08.030
  • ISSN : 0022-4596
  • eISSN : 1095-726X
  • Web of Science ID : WOS:000326850200027

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