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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. Fase única de ferrita de lantânio foi preparada com sucesso em baixa temperatura de processamento usando o método do complexo polimerizável. Para implementar este trabalho, foram usadas várias técnicas como calorimetria diferencial de varredura, difração de raios X, infravermelho com transformada de Fourier, microscopia eletrônica de varredura e análise de adsorção gasosa (BET). Pelos resultados obtidos foi mostrado que as etapas de preparação do pó precursor e a temperatura de calcinação são parâmetros críticos para evitar a segregação de fases e obter o composto puro de ferrita de lantânio. Assim, uma fase única de perovskita foi obtida a 600 °C. Nessa temperatura, foi observado pó homogêneo e fino com tamanho médio de cristalito de 13 nm e área de superfícies especifica de 12,5 m².g-1

Preparation of lanthanum ferrite powder at low temperature