Abstract
Here we report the characterization of perovskite-type oxides La 1-xMxMnO3 (M=Ca, Sr; x=0, 0.3) prepared by a simple technique based on the Pechini-type reaction route. As an alternative route solid-state reaction method was also used. The structure of the obtained materials have been investigated by XRD and IR spectrometry. The microstructure and the grain size distribution were determined by scanning electron microscopy. Fine, homogeneous nanopowders were obtained after treatment for only 6 hours at temperatures as low as 550°C for the systems obtained by polymerizable complex method. The powders crystallized in a distorted perovskite structure with rhombohedral or orthorhombic symmetry (LaMnO3+δ obtained by polymerizable complex method and La0.7Ca0.3MnO 3+δ) and orthorhombic symmetry (LaMnO3+δ obtained by solid state and La0.7Sr0.3MnO 3+δ). In the case of the substituted samples, the oxidation of B-site metallic ion was observed.
| Original language | English |
|---|---|
| Pages (from-to) | 1261-1264 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 264-268 |
| Issue number | II |
| DOIs | |
| Publication status | Published - 2004 |
| Event | Proceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey Duration: 2003 Jun 29 → 2003 Jul 3 |
Keywords
- Ca substitution
- LaMnO
- Perovskite oxides
- Polymerizable complex method
- Solid state reaction
- Sr substitution
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering