METHOD OF PRODUCING MULTIFERROICS BY IMPREGNATION BASED ON A FERROMAGNETIC GLASS MATRIX Russian patent published in 2020 - IPC C03C21/00 C03B32/00 C03C4/14 

FIELD: technological processes.

SUBSTANCE: invention relates to production of oxide glass-like composites – multiferroics combining ferromagnetic and electrical properties, which can be used in microwave electronics. Initial iron-containing silicate glass in K₂O-Fe₂O₃-SiO₂ system is synthesized by the method of batching from a charge in an electric silit furnace in air at temperatures of 1,500 °C in platinum crucible. Method then includes annealing glass and ion-exchange treatment of iron-containing silicate glass plates in melt of sodium nitrate in the temperature range of 350–450 °C isothermal holding for 6–24 hours, during which the porous magnetic glass matrix is formed, after which the ferroelectric phase is introduced into the obtained glass matrix by impregnating with a salt solution or a melt, for this purpose preparing a saturated solution of Rochelle salt – KNaC₄H₄O₆⋅4H₂O, based on 55 g per 100 ml of distilled water at temperature 20 °C, then, a plate of porous ferromagnetic glass is placed in a chemical shell with a ready solution and impregnation of the glass matrix is performed with periodic mixing of Rochelle salt solution and overturning of the treated sample for 12 hours. Sample is removed from solution and dried at temperature of 50 °C in the drying cabinet for 1 hour.

EFFECT: obtaining a glass-crystalline composite which combines ferromagnetic and ferroelectric properties.

1 cl, 3 dwg