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 language | English |
---|---|
Pages (from-to) | 654-660 |
Number of pages | 7 |
Journal | Journal of Materials Science and Technology |
Volume | 28 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2012 |
Keywords
- Crystal structure
- Electrical conductivity
- Perovskite
- Sintering