Influence of the ratio between the amounts of reagent total/H_2O to obtain ferrites Mn_(0.65)Zn_(0.35)Fe_2O_4 by combustion reaction

摘要

This work proposes to study the influence of dilution on the synthesis of ferrites Mn_(0.65)Zn_(0.35)Fe_2O_4 using glycine. It was used the reactants/H_20 proportions of 1:0; 1:3.5; 1:7; 1:10, and 1:14 (100 mL of H_2O). During the synthesis were measured the time and temperature of combustion. The samples were characterized by X-ray diffraction and X-ray fluorescence. The dilution in the samples increased with the increasing of the reaction time and flame temperature. For samples synthesized with 1:0, 1:3.5; and 1:7 ratio were observed traces of hematite, and to the remaining samples only the single phase of the Mn_(0.65)Zn_(0.35)Fe_2O_4 spinel. The crystallite sizes ranged from 32 to 42 nm.