Structure, nonstoichiometry, sintering and oxygen permeability of perovskite SrCo1-2x(Fe,Nb)xO3-δ (x = 0.05, 0.10) oxides

Jin Na Zhang, Hui Lu, Jian Zhou Gui, Jong Pyo Kim, Sou Hwan Son, Jung Hoon Park

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The novel Fe/Nb co-substituted SrCo1-2x(Fe,Nb)xO 3-δ (x = 0.05, 0.10) oxides have been synthesized and characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetry (TG), and scanning electron microscopy (SEM). The XRD and DSC results demonstrate that the structural stability of the Fe/Nb co-substituted samples x = 0.05, 0.10 is improved greatly compared to the sample x = 0.00. The Fe/Nb co-doping in the SrCoO3-δ oxide results in the improved structural stability of the SrCo1-2x(Fe,Nb) xO3-δ (x = 0.05, 0.10) oxides. The nonstoichiometric and sintering properties were investigated by TG and SEM, and the oxygen permeation fluxes were measured at 800-950 °C for the sample x = 0.10. The improved oxygen permeability of the ceramic SrCo1-2x(Fe,Nb) xO3-δ (x = 0.10) membrane compared to the (Ba 0.5Sr0.5)(Co0.8Fe0.2)O 3-δ and SrCo0.8Fe0.2O3-δ membranes, was observed under an air/He oxygen partial pressure gradient at 800-950 °C.

Original languageEnglish
Pages (from-to)443-448
Number of pages6
JournalMaterials Science and Engineering: B
Volume178
Issue number7
DOIs
StatePublished - 20 Apr 2013

Keywords

  • Crystal structure
  • Oxygen permeability
  • Perovskite oxides
  • Sintering
  • Structural stability

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