METHOD OF OBTAINING MAGNETITE NANOPARTICLES, STABILISED WITH POLYVINYL ALCOHOL Russian patent published in 2014 - IPC C01G49/08 B82B1/00 B82Y99/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in magnetic nanoelectronics for magnetic registering media with high recording density, for magnetic sensors, radio-absorbing screens, as well as in medicine. Method of obtaining magnetite nanoparticles, stabilised with polyvinyl alcohol, includes obtaining magnetite in alkali medium of mixture of salts of bi- and trivalent iron and polyvinyl alcohol with weight content in initial mixture from 4 to 18 wt %, dispersion, washing and carrying out all operations under continuous ultrasound impact. Process of sedimentation of salts of bi- and trivalent iron and polyvinyl alcohol is carried out in ammonia vapour, with application of aqueous ammonia (NH₄OH) or hydrazine hydrate (N₂H₄·H₂O).

EFFECT: invention makes it possible to reduce scatter of magnetite nanoparticles by size, reduce labour consumption and expenditures in the course of process.

2 dwg, 2 ex