METHOD OF PRODUCING SINGLE-PHASE YTTRIUM IRON GARNET YFeO Russian patent published in 2024 - IPC C01G49/00 C01F17/10 C01F17/32 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used in making integrated circuits, devices with charging coupling, as well as magnetic recording and microwave devices. Single-phase yttrium iron garnet Y₃Fe₅O₁₂ is obtained using glycine-nitrate pyrolysis technology. Initial reagents used are yttrium oxide Y₂O₃, dissolved in nitric acid, and iron (III) nitrate n-aqueous Fe(NO₃)₃×nH₂O, where number n is determined by gravimetric analysis, as organic reducing agent required for pyrolysis – aminoacetic acid C₂H₅NO₂. An organic nitrate precursor obtained by mixing said reagents is evaporated before spontaneous pyrolysis begins. Semi-product obtained as a result of pyrolysis is subjected to two-stage thermal treatment: first, it is annealed at 750 °C for 8 hours, then sintered at 1,200 °C for 20 hours.

EFFECT: invention provides short duration of synthesis, and the single-phase nature of the obtained garnet determines accuracy and reproducibility of its functional characteristics.

1 cl, 8 dwg, 1 tbl, 4 ex