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Cerâmica

versão impressa ISSN 0366-6913

Resumo

ANDOULSI, R.; HORCHANI-NAIFER, K.  e  FERID, M.. Preparation of lanthanum ferrite powder at low temperature. Cerâmica [online]. 2012, vol.58, n.345, pp. 126-130. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132012000100020.

Single lanthanum ferrite phase was successfully prepared at low processing temperature using the polymerizable complex method. To implement this work, several techniques such as differential scanning calorimetry, X-ray diffraction, Fourier Transform Infrared Spectroscopy, scanning electron microscopy and BET surface area measurements were used. Throw the obtained results, it was shown that steps of preparing the powder precursor and temperature of its calcination are critical parameters for avoiding phase segregation and obtaining pure lanthanum ferrite compound. Thus, a single perovskite phase was obtained at 600 °C. At this temperature, the powder was found to be fine and homogeneous with an average crystallite size of 13 nm and a specific surface area of 12.5 m2.g-1.

Palavras-chave : perovskite; lanthanum ferrite; synthesis; characterization; thermal decomposition; microstructure.

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