PRODUCING METHOD OF FE3O4

摘要

The present invention relates to a method of fabricating spinel ferrite ferromagnetic ferrous oxide which is simple in process and has excellent particle dispersion. According to the inventive method, an alkali water solution is added to FeCl36H2O to make a [Fe(OH)3 slurry as a base material, and saccharose is added thereto in the range of 5 x 10-5-2.5 x 10-4 mole% with a mole% [saccharose mole%/Fe(g) to [Fe(OH)3 's Fe atom 1g. This slurry's basicity is controlled to be less than 4 or in the range or 6.0 to 12.75. The slurry's basicity is reacted at 140deg.C and over.