OPTIMIZATION OF THE MOLARITY OF NaOH AS PRECIPITATING AGENT FOR THE SYNTHESIS OF Ni FERRITE NANOCRYSTALLINE POWDERS BY COPRECIPITATION METHOD

In this study, the effects of the molarity of the precipitating agent on the synthesis of nanostructured NiFe₂O₄ powders by coprecipitation, followed by calcination were investigated and its optimum amount was also determined. Ni-ferrite powder was synthesized for the first time by dissolving Fe and Ni chlorides and ammonium ferrous sulfate in deionized water with different molar proportions. While stirring, the precipitating agent of NaOH was added to the solution with different molarities and after 1 hour of aging, the resultant precipitate was washed with deionized water and acetone.

It was concluded that single phase nickel ferrite nanocrystalline powders can be prepared by use of 2.2M NaOH, with crystallite size of 30-50 nm.