Sol–gel synthesis of iron yttrium garnet Y3Fe5O12 using metal acetylacetonates

Resumo

The synthesis of hydrolytically active heteroligand complexes of the composition [M(O₂C₅H₇)x(ⁱOC₅H₁₁)_y] (M = Fe³⁺ and Y³⁺) using iron and yttrium acetylacetonates was studied. Their reactivity was shown to be dependent on the degree of shielding of iron and yttrium cations in hydrolysis and polycondensation during the formation of a connected dispersion system. The crystallization temperature of iron yttrium garnet Y₃Fe₅O₁₂ upon heating xerogel was determined. It was found that the dispersity, microstructure, and magnetic characteristics of the products depend on the synthesis conditions.