Oxygen nonstoichiometry and exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3-δ

被引：163
|
作者：
Bucher, Edith [1 ]
Egger, Andreas [1 ]
Ried, Peter [2 ]
Sitte, Werner [1 ]
Holtappels, Peter [2 ]
机构：
[1] Univ Min & Met Leoben, Chair Phys Chem, A-8700 Leoben, Austria
[2] Empa, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland
来源：
SOLID STATE IONICS | 2008年 / 179卷 / 21-26期
关键词：
perovskite oxide; BSCF; oxygen nonstoichiometry; oxygen exchange; conductivity relaxation;
D O I：
10.1016/j.ssi.2008.01.089
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The oxygen nonstoichiometry of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF5582) was investigated by thermogravimetry resulting in values of 2.40 <(3 - delta)< 2.57 for the equilibrium oxygen content in the range 600 <= T/degrees C <= 900 and 1E-4 < pO(2)/bar < 0.4. The oxygen exchange kinetics was studied by electrical conductivity relaxation as a function of temperature in the range 550 <= T/degrees C <= 725 with chemical diffusion coefficients 1E-6 < D-chem/cm(2) s(-1) < 3E-5 and (k(chem)) = 64 +/- 12 kJ mol(-1). Self-diffusion and surface exchange coefficients, as well as ionic conductivities are estimated. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1032 / 1035
页数：4
相关论文
共 50 条
  • [1] Oxygen surface exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3-δ
    Eremin, V. A.
    Ananyev, M. A.
    Bouwmeester, H. J. M.
    Kurumchin, E. Kh
    Yoo, Ch-Y
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2020, 22 (18) : 10158 - 10169
  • [2] Oxygen tracer diffusion and surface exchange kinetics in Ba0.5Sr0.5Co0.8Fe0.2O3-δ
    Berenov, A.
    Atkinson, A.
    Kilner, J.
    Ananyev, M.
    Eremin, V.
    Porotnikova, N.
    Farlenkov, A.
    Kurumchin, E.
    Bouwmeester, H. J. M.
    Bucher, E.
    Sitte, W.
    [J]. SOLID STATE IONICS, 2014, 268 : 102 - 109
  • [3] Ba0.5Sr0.5Co0.8Fe0.2O3-δ for Oxygen Separation Membranes
    Mueller, P.
    Dieterle, L.
    Mueller, E.
    Stoermer, H.
    Gerthsen, D.
    Niedrig, C.
    Taufall, S.
    Wagner, S. F.
    Ivers-Tiffee, E.
    [J]. IONIC AND MIXED CONDUCTING CERAMICS 7, 2010, 28 (11): : 309 - 314
  • [4] The crystal structure, oxygen nonstoichiometry and chemical stability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF)
    Wang, Fang
    Nakamura, Takashi
    Yashiro, Keiji
    Mizusaki, Junichiro
    Amezawa, Koji
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (16) : 7307 - 7314
  • [5] Synthesis and characterization of Ba0.5Sr0.5Co0.8Fe0.2O3-σ
    Wang Qibao
    Yuan Yan
    Han Minfang
    Zhu Peiyu
    [J]. RARE METALS, 2009, 28 (01) : 39 - 42
  • [6] Synthesis and characterization of Ba0.5Sr0.5Co0.8Fe0.2O3-σ
    WANG Qibao
    [J]. Rare Metals, 2009, 28 (01) : 39 - 42
  • [7] Structure and oxygen stoichiometry of SrCo0.8Fe0.2O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ
    McIntosh, Steven
    Vente, Jaap F.
    Haije, Wim G.
    Blank, Dave H. A.
    Bouwmeester, Henny J. M.
    [J]. SOLID STATE IONICS, 2006, 177 (19-25) : 1737 - 1742
  • [8] Oxygen transport through supported Ba0.5Sr0.5Co0.8Fe0.2O3-δ membranes
    Niehoff, P.
    Baumann, S.
    Schulze-Kueppers, F.
    Bradley, R. S.
    Shapiro, I.
    Meulenberg, W. A.
    Withers, P. J.
    Vassen, R.
    [J]. SEPARATION AND PURIFICATION TECHNOLOGY, 2014, 121 : 60 - 67
  • [9] Oxygen tracer diffusion in dense Ba0.5Sr0.5Co0.8Fe0.2O3-δ films
    Wang, L.
    Merkle, R.
    Maier, J.
    Acartuerk, T.
    Starke, U.
    [J]. APPLIED PHYSICS LETTERS, 2009, 94 (07)
  • [10] Stability aspects of porous Ba0.5Sr0.5Co0.8Fe0.2O3-δ
    Lipinska-Chwalek, M.
    Schulze-Kueppers, F.
    Malzbender, J.
    [J]. CERAMICS INTERNATIONAL, 2014, 40 (05) : 7395 - 7399
12345