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Sol—Gel Synthesis of Strontium‐Doped Lanthanum Manganite
Author(s) -
Bilger Serge,
Syskakis Emmanuel,
Naoumidis Aristides,
Nickel Hubertus
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb04167.x
Subject(s) - lanthanum manganite , materials science , perovskite (structure) , lanthanum , strontium , amorphous solid , phase (matter) , differential thermal analysis , sintering , sol gel , manganite , inorganic chemistry , ammonium hydroxide , chemical engineering , nuclear chemistry , chemistry , crystallography , diffraction , organic chemistry , nanotechnology , metallurgy , physics , electrode , quantum mechanics , engineering , ferromagnetism , optics , electrolyte
Strontium‐doped lanthanum manganite powders 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°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°C and achieved about 700°C and achieved about 700°C, as well as during the sintering process.