Preparation of nickel ferrite from thermolysis of nickel tris(malonato)ferrate(III) heptahydrate precursor

摘要: Abstract The thermal decomposition of nickel tris(malonato)ferrate(III) heptahydrate precursor, Ni 3 [Fe(CH 2 C O 4 ) ] ·7H has been investigated from ambient temperature to 1073 K in static air atmosphere using various physico-chemical techniques, i.e. TG–DTG–DSC, XRD, Mossbauer and IR spectroscopy. precursor undergoes dehydration simultaneously yield malonate iron(II)malonate intermediates at 513 K. At higher (593 K) these intermediate species decompose NiO α-Fe , respectively. Finally, ferrite, NiFe obtained as a result solid-state reaction between Fe (673 K) much lower than that the conventional ceramic method. SEM analysis final thermolysis product reveals formation ferrite nanoparticles with an average particle size 40 nm. Magnetic studies show particles possess saturation magnetization Curie 2970 G 843 K, Lower magnitude parameters compared bulk values may be attributed ultrafine nature particles.