A compar ative study on structure and microstructure of zinc ferrite nanopo wders prepared using different fuels

Zinc ferrite (ZnFe ۲O۴) has a normal spinel structure; it is a com mercially i mportant ma terial and h as been widely used in magnetic ap plications, gas sensors, catalysts, p hotocatalyst, and absorb ent materials due to its excellent el ectrical and magnetic properties [۱]. Currently, more attention has bee n paid to the auto-combustion m ethod for synthesizin g nanocrystalline ferrites. Sol-gel a uto combustion synthesis induced by a self-sust ained exothermic reaction of a fuel mixed to the reactants [۲]. The different fuels enhance the efficacy and efficiency of the sol-gel auto combustion proce ss. The experimental investigation showed that, the fuel type, in other words natu re of the organic co mplexing a gent has di rect influe nce on the final charac teristics of the resultan t powders, namely, on the crystallite phase fo rmation pr ocess, struct ural characte ristics, morphology of zinc ferrite p owders and the produce d crystallite size;i.e.,with the ch anging fuel type, would be cha nge these fundamenta l parameters ofcrystallites. The ratio of the fuel to metal nitrates (molar ratio of Zn۲+: Fe۳+: fuel) could influence the amount of heat release a nd agglomeration tende ncy of par ticles; henc e, the varying zinc ferrite crystallites size.

کلیدواژه ها:

Zinc Ferrite ، Auto Combusti on ، Fuel ، M orphology ، XRD ، SEM.