METHOD OF OBTAINING NANODISPERSED FERRITES OF RARE-EARTH METALS Russian patent published in 2010 - IPC C01F17/00 B82B3/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in modern telecommunication and electronic devices. An initial aqueous solution of an iron salt with concentration of 0.05-0.10 mol/l in hydrochloric acid and an initial aqueous solution of a salt of a rare-earth metal with concentration of 0.05-0.10 mol/l are prepared. Iron is then extracted from the prepared solution using a benzene solution containing trialkylbenzylammonium chloride and the rare-earth metal is extracted using a benzene solution containing trialkylbenzylammonium chloride and acetylacetone. Aqueous phases of extracts of the iron and rare-earth metal obtained after separation are mixed to obtain the end product which is a type of orthoferrites with perovskite structure or garnet-type ferrites. The end product is extracted by distilling off an organic solvent at 60-100°C, after which the residue is hydrolysed at 600-700°C for 1-2 hours.

EFFECT: possibility of obtaining ferrites of rare-earth metals in form of nanodispersed powders in form of thin films on different substrates, reduced power consumption and duration of the process.

9 cl, 5 ex