MgAl0.4Fe1.6O4 powders prepared via gel combustion

Powdered ferrite of composition MgAl0.4Fe1.6O4 is prepared by the combustion of gels consisting of a mixture of magnesium, aluminum, and iron nitrates, citric acid, and NH4NO3 added into the reaction mixture. The process is demonstrated to involve a single stage without the formation of volatile carbon-containing compounds when the ratio of the number of NH4NO3 moles to the total number of metal nitrate moles n = 10.1.