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Journal articles
Oxygen content and thermodynamic stability of YBaCo4 O7 ± δ
Abstract : Abstract YBaCo4 O7 ± δ was found to be thermodynamically stable in air at T > 900 °C whereas its thermodynamic stability at 950 °C is limited by the range of oxygen partial pressures - 5.05 ≤ log(pO2 /atm) ≤ - 0.5. Oxygen content in YBaCo4 O7 ± δ at 950 °C slightly decreases from 7.009 at log(pO2 /atm) = - 0.5 to 6.953 in the atmosphere with log(pO2 /atm) = - 5.05. YBaCo4 O7 ± δ decomposes into the mixture of YCoO3-δ , BaCoO3-δ and Co3 O4 at 950 °C in atmosphere with log(pO2 /atm) > - 0.5 whereas in atmosphere with log(pO2 /atm) < - 5.05 Y2 BaCoO5 , BaCoO2 and CoO were identified as the products of YBaCo4 O7 ± δ decomposition. © 2015 Elsevier B.V.
https://hal-normandie-univ.archives-ouvertes.fr/hal-02184096
Contributor : Elisabeth van T Hof <>
Submitted on : Monday, July 15, 2019 - 6:03:46 PM
Last modification on : Tuesday, June 1, 2021 - 1:44:16 PM
Contributor : Elisabeth van T Hof <>
Submitted on : Monday, July 15, 2019 - 6:03:46 PM
Last modification on : Tuesday, June 1, 2021 - 1:44:16 PM
