Preparation of zinc ferrite from the thermolysis of zinc tris (malonato) ferrate (III) decahydrate

Abstract

The thermal decomposition of zinc tris(malonato)ferrate (III) decahydrate has been investigated from ambient temperature to 600°C in static air atmosphere using various physico-chemical techniques i. e. simultaneous TG-DTG-DTA, XRD. Mossbauer and IR. After dehydration at 190^oC, the anhydrous complex undergoes oxidative decomposition to yield <img src='http://www.niscair.res.in/jinfo/infinity.gif' border=0>-Fe₂O₃and ZnO at 330°C. Subsequently the cations remix to yield fine particles of zinc ferrite, ZnFe₂O₄ as a result of solid state reaction between <img src='http://www.niscair.res.in/jinfo/infinity.gif' border=0>-Fe₂O₃ and ZnO at a temperature (400^oC) much lower than for ceramic method. The results have been compared with those of respective oxalates.