Sol-gel synthesis of strontium-doped lanthanum manganite

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1992.tb04167.x· OSTI ID:5133634

Bilger, S; Syskakis, E; Naoumidis, A; Nickel, H ^[1]

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1. Research Center Juelich, Inst. for Reactor Materials, 5170 Juelich (DE)

This paper reports on strontium-doped lanthanum manganite powders that were prepared using a peroxide acetate salt based solution. The stable sol was peptized by reacting ammonium hydroxide with the precursor solution. The amorphous dried gel powders exhibit a high energy level, due to their high cations coordination and small particles, to develop the perovskite phase. This crystalline phase development from powders containing monocarboxylate ligands was characterized by thermal analysis (TG, DTG, DTA), X-ray diffraction, and IR spectroscopy. The transformation from amorphous powders into a crystallized homogeneous oxycarbonate phase in a first stage corresponds to an exothermal DTA peak at 270{degrees} C. X-ray diffraction patterns and IR spectra showed similar behavior of the powders after complete organic removal, during the conversion into perovskite phase starting at approximately 630{degrees} C and achieved about 700{degrees} C, as well as during the sintering process.

• OSTI ID: 5133634
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 75:4; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LANTHANUM ALLOYS
STRONTIUM ADDITIONS
MANGANESE ALLOYS
PEROVSKITE
PHASE STUDIES
AMORPHOUS STATE
CHEMICAL PREPARATION
DIFFERENTIAL THERMAL ANALYSIS
ENERGY LEVELS
INFRARED SPECTRA
PHASE TRANSFORMATIONS
POWDERS
SOL-GEL PROCESS
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTION
ALLOYS
COHERENT SCATTERING
DIFFRACTION
MINERALS
OXIDE MINERALS
PEROVSKITES
RARE EARTH ALLOYS
SCATTERING
SPECTRA
STRONTIUM ALLOYS
SYNTHESIS
TEMPERATURE RANGE
THERMAL ANALYSIS
360102* - Metals & Alloys- Structure & Phase Studies
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures