Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102943
Title: Oxygen content and thermodynamic stability of YBaCo2O6-δdouble perovskite
Authors: Sednev, A. L.
Zuev, A. Y.
Tsvetkov, D. S.
Issue Date: 2018
Publisher: Hindawi Limited
Citation: Sednev A. L. Oxygen content and thermodynamic stability of YBaCo2O6-δdouble perovskite / A. L. Sednev, A. Y. Zuev, D. S. Tsvetkov. — DOI 10.1155/2018/1205708 // Advances in Materials Science and Engineering. — 2018. — Vol. 2018. — 1205708.
Abstract: The thermodynamic stability of the double perovskite YBaCo2O6-δ was studied using the coulometric titration technique and verified by measurements of the overall conductivity depending on oxygen partial pressure at a given temperature. As a result, the stability diagram of YBaCo2O6-δ was plotted. YBaCo2O6-δ was found to be thermodynamically stable in air at 850°C and higher temperatures, whereas its thermodynamic stability at 900°C is limited by the range of oxygen partial pressures -3.56 ≤ log(pO2/atm) ≤ -0.14. Oxygen content in YBaCo2O6-δ slightly decreases at 900°C from 5.035 at log(pO2/atm) = -0.14 to 4.989 in the atmosphere with log(pO2/atm) = -3.565 indicating a crucial role which variation of Co+3/Co+2 ratio plays in its stability. YBaCo2O6-δ decomposes into the mixture of YCoO3 and BaCoO3-z at the high pO2 stability limit, whereas YBaCo4O7, BaCo1-xYxO3-γ, and Y2O3 were identified as the products of its decomposition at the low pO2 one. Copyright © 2018 Anton L. Sednev et al.
Keywords: OXYGEN
PARTIAL PRESSURE
PEROVSKITE
STABILITY
THERMODYNAMIC STABILITY
THERMODYNAMICS
TITRATION
COULOMETRIC TITRATION
DOUBLE PEROVSKITES
MEASUREMENTS OF
OXYGEN CONTENT
OXYGEN PARTIAL PRESSURE
STABILITY DIAGRAM
STABILITY LIMIT
THERMODYNAMICALLY STABLE
BARIUM COMPOUNDS
URI: http://hdl.handle.net/10995/102943
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85104858160
PURE ID: 8184141
ISSN: 16878434
DOI: 10.1155/2018/1205708
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-85104858160.pdf1,95 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.