Studies on the synthesize iron oxide from ferric citrate under different atmosphere

Iron oxides were prepared by heat-treating ferric citrate under rich-oxide and non-oxide atmosphere.The pyrogenations of ferric citrate at different atmospheres were characterized by the technique of TG.The relation between the reaction temperature reaction time of pyrolyze ferric citrate and the composition,structure of iron oxide were studied by XRD.The results show that the pyrolytic products under air atmosphere are Fe3O4,the transformation of α-Fe2O3 from Fe3O4 is enhanced with increasing reaction temperature or prolonging reaction time;while,the pyrolytic products under non-oxide atmosphere are Fe3O4 and amorphous carbon,the redox reaction between Fe3O4 and amorphous carbon is promoted by increasing reaction temperature or prolonging reaction time.