Structural, Sintering and Electrical Properties of Cr-doped La 0.6Sr 0.4Cr xFe 1-xO 3-δ (x=0.10, 0.20) Oxides

Hui Lu, Linlin Zhu, Jong Pyo Kim, Sou Hwan Son, Jung Hoon Park

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The perovskite Cr-doped La 0.6Sr 0.4Cr xFe 1-xO 3-δ (x=0.10, 0.20) oxides were synthesized via the citrate gel method. The perovskite forming of the La 0 6Sr 0.4Cr xFe 1-xO 3-δ (x=0.10, 0.20) oxides were studied by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). Structural and chemical stability under H2-containing helium atmospheres of La 0.6Sr 0.4Cr xFe xO 3-δ (x=0.10, 0.20) were investigated by TG and XRD. The sintering microstructures of the perovskite La 0.6Sr 0.4Cr xFe xO 3-δ (x=0.10, 0.20) ceramics were investigated by scanning electron microscopy (SEM), and the electrical conductivities of both oxide ceramics were also measured up to 900 °C. The results demonstrated that the chemical stability of the Co-free La 0.6Sr 0.4Cr XFe 1-XO 3-δ (x=0.10, 0.20) oxides was significantly improved compared to the Co-containing La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ and Ba 0.5Sr 0.5Co 0.8Fe 0.2O 3-δ oxides. The incorporation of Cr cations in the B-site of the pervoskite oxides resulted in the improved structural and chemical stability of the as-synthesized La 0 6Sr 0.4Cr xFe 1-XO 3-δ (x=0.10, 0.20) oxides.

Original languageEnglish
Pages (from-to)654-660
Number of pages7
JournalJournal of Materials Science and Technology
Volume28
Issue number7
DOIs
StatePublished - Jul 2012

Keywords

  • Crystal structure
  • Electrical conductivity
  • Perovskite
  • Sintering

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