Synthesis and characterization of manganese and nickel ferrite nanoparticles

Joyce, Liang (2009) Synthesis and characterization of manganese and nickel ferrite nanoparticles. [Final Year Project Report] (Unpublished)

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Abstract

In this study, manganese ferrites and nickel ferrites nanoparticles were synthesized via co-precipitation method at low calcination temperatures. The ferrites precursors were obtained from the aqueous mixtures of manganese, nickel and ferric chlorides via co-precipitation of manganese and nickel to iron ions by adding 5M sodium hydroxide solution gradually until the range of pH 10-pH 12 were achieved at room temperature. These precursors were calcined in a furnace at temperatures of 400-800°C for 2 h in air atmosphere. The effects of Fes/Mn2+ and Fes+/Ni2+ mole ratio and calcination temperatures on the structural properties of the produced ferrites powders were studied. The physico-chemical characteristics of the calcined manganese and nickel ferrates powders were further investigated by scanning electron microscope (SEM), Fourier transformed infrared spectroscopy (FT-IR) and atomic absorption spectroscopy (AAS). As a result of this method, the elemental composition has been found where x values were at between 0.615 and 1.271 for manganese ferrites and at between 0.363 and 1.408 for nickel ferrites. The crystallinity of the both ferrites was found to increase as the calcination temperature were increased and the particle size of both ferrites was also found to be increased as the mole ratio of Fe3+/Mn2' and Fes+/Ni2+ increased.

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