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Title: Synthesis and characterization of La1-xSrx MnO3±δ powders obtained by the polymeric precursor route
Authors: Rabelo, Adriano Alves
Macedo, Marfran Cardoso de
Melo, Dulce Maria de Araújo
Paskocimas, Carlos Alberto
Martinelli, Antonio Eduardo
Nascimento, Rubens Maribondo do
Keywords: Perovskite;Polymeric precursor;SOFC
Issue Date: 1-Apr-2011
Publisher: ABM, ABC, ABPol
Citation: RABELO, Adriano Alves; MACEDO, Marfran Cardoso de; MELO, Dulce Maria de Araújo; PASKOCIMAS, Carlos Alberto; MARTINELLI, Antonio Eduardo; NASCIMENTO, Rubens Maribondo do. Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route. Materials Research, [S.L.], v. 14, n. 1, p. 91-96, 1 abr. 2011. Disponível em: Acesso em: 11 nov. 2020.
Portuguese Abstract: Polycrystalline strontium-doped lanthanum manganite (LSM) powders with 0.15, 0.22, and 0.30 mol % Sr were synthesized by the polymeric precursor route using a molar ratio of 3:1 citric acid and metal cations. The powders were characterized by Fourier transform infrared spectroscopy, thermal analysis, high-temperature X-ray diffraction to determine the crystalline perovskite phase and crystallite sizes, scanning electron microscopy for the morphological analysis, nitrogen adsorption to determine the specific surface area, and laser scattering to evaluate the particle size distribution. The LSM perovskite-type oxides containing intermediate 0.22 mol % Sr were found to exhibit a tendency to decrease in crystallite size and increase in specific surface area and, when calcined at 700–900 °C exhibited a pure phase of perovskite, had a crystallite size of about 17–20 nm and a specific surface area for 900 °C of 34.3 m2 .g-1
ISSN: 1980-5373
Appears in Collections:CT - DEMAT - Artigos publicados em periódicos
IQ - Artigos publicados em periódicos

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