Characterization of the substituted lanthanum manganites

M. Popa, L. Viciu, M. Zaharescu, M. Kakihana

    Research output: Contribution to journalConference articlepeer-review

    1 Citation (Scopus)

    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 languageEnglish
    Pages (from-to)1261-1264
    Number of pages4
    JournalKey Engineering Materials
    Volume264-268
    Issue numberII
    DOIs
    Publication statusPublished - 2004
    EventProceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey
    Duration: 2003 Jun 292003 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

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