INFLUENCE OF COMPLEXING AGENTS AND PH ON YTTRIUM-IRON-GARNET SYNTHESIZED BY THE SOL-GEL METHOD

A systematic study of the sol-gel technique for the synthesis of Y3Fe5 O12 is presented, using two different complexing agents (citric acid a nd malonic acid) and adding two different alcohols (ethylene glycol an d glycerol). The influence of the pH value of the initial solution on the final product is also studied, Yttrium-iron garnet YIG is obtained from the gels by heating above 650 degrees C in air atmosphere. Sampl es are characterized by X-ray powder diffraction and IR spectroscopy. The crystallite size and the lattice parameter are also determined, an d their dependence on the synthesis conditions is studied.