PRODUCTION OF METAL IRON-BASED COMPOSITE NANOMATERIAL IN PORES OF MESOPOROUS MATRIX WITH MAGNETIC PROPERTIES Russian patent published in 2014 - IPC C22C1/08 B82B3/00 

FIELD: metallurgy.

SUBSTANCE: composite nanomaterial based on metal iron in powers of mesoporous matrix of silica SBA-15 that feature magnetic properties. Mesoporous matrix is impregnated with iron salts to be, then, removed from outer surface and processed by hydrogen in matrix pores till metal iron. Prior to impregnating, said matrix is dried at 200°C, not over. Weight of dried mesoporous matrix is placed in quartz reactor and treated by vapours of trichloraluminium in the flow of dry inert gas for at least 2 hours. Then, feed of said vapours is terminated to go on processing by said inert gas flow for at least 12 hours. Then, weight of mesoporous matrix is processed with water steam in the flow of dry inert gas for at least 2 hours. Then, feed of said vapours is terminated to go on processing by said inert gas flow for at least 12 hours. Thereafter, obtained alumina monolayer is built up many times to preset size of pores and magnetic properties of mesoporous matrix.

EFFECT: stable magnetisation owing to controlled adjustment of pore sizes and thickness of walls between pores.

4 cl, 2 dwg, 3 tbl, 4 ex