Perovskite Co-free La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) mixed-conductors: Preparation and characterization

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

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The new Co-free La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) perovskite oxides have been successfully synthesized by the citrate acid complexing method. The La0.6Sr0.4Co0.2Fe0.8O3- δ and as-synthesized Co-substituted La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) oxides all possess the rhombohedral perovskite-type structure. The structural stability, chemical reduction-tolerance ability (in a flowing 10% H2/helium stream) and sintering performance of the as-synthesized La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) oxides were studied by XRD, TGA/DSC and SEM. The results demonstrate the reduction-tolerance ability of the as-synthesized Co-free La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) oxides is improved significantly compared to that of the Co-containing La0.6Sr0.4M0.2Fe0.8O3- δ (M = Co) oxide. The presence of Cr3+/4+ or Ti3+/4+ ions in the B-sites of the perovskite-type structure can further stabilize the neighboring oxygen octahedral (BO6) due to the stronger columbic attraction, leading to the enhanced stability of the as-synthesized Cr- or Ti-substituting perovskite Co-free oxides.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalMaterials Science and Engineering: B
Volume163
Issue number3
DOIs
StatePublished - 25 Jul 2009

Keywords

  • Ceramics
  • Crystal structure
  • Perovskite oxide
  • Reduction-tolerance

Fingerprint

Dive into the research topics of 'Perovskite Co-free La0.6Sr0.4M0.2Fe0.8O3- δ (M = Cr or Ti) mixed-conductors: Preparation and characterization'. Together they form a unique fingerprint.

Cite this