Abstract

• ng material for its interesting electrical, magnetic, catalytic and thermoelectric properties. In this study, the nanocrystalline LaFeO3 powder was prepared by citrate sol-gel method and co-precipitation method.In the citrate sol gel method, a modified Pechini method based on the polyesterification of citric acid and ethylene glycol for the synthesis of the LaFeO3 The precursor for LaFeO3 will be synthesized by co-precipitation from metal nitrate and carbonate salts. The properties of the LaFeO3 powders were studied by TG-DTA, XRD, SEM, FT IR and EDXRF. The results showed that LaFeO3was formed at the lower temperature in the citrate sol-gel method compared to co-precipitation method. The size of spherical LaFeO3 synthesized by sol-gel was 20-25nm, whereas the sample prepared by co-precipitation yielded nearly tetragonal and flake like powder with particle size of 20-35nm. The difference in preparation methods results in the difference in the structure and morphology of prepared materials.