2020, №3

сс. 73-86

Analysis of the Stages of Yttrium Iron Garnet Formation from a Precursor Obtained by the Supercritical Antisolvent Preci pitation CO2 Technique

2020, №3

сс. 73-86

Цитировать

I.E. Sokolov, E.I. Efremova, N.M. Boeva, A.R. Erofeeva, A.I. Kolobanov, A.S. Sigov, V.V. Fomichev

Key words: supercritical antisolvent preci pitation technique, supercritical carbon dioxide, yttrium-iron garnet, thermodynamics, kinetics

In this paper, the authors synthesized and studied the phase formation of yttrium-iron
garnet (YIG) using the supercritical antisolvent preci pitation technique (SAS) at the
initial stage for the first time. The effect of supercritical CO2 on the solution of acetates
in the quasi-equilibrium state causes an abnormally high mobility of the structure elements.
As a result, it becomes possible to form the equilibrium phase of the YIG solid product
directly (without the appearance of transition oxides) at temperatures much lower than
by solid-phase synthesis. The temperature decrease is due to a significant decrease in the
activation energy of the solid solution.

doi:10.1134/S1990793121070150