Synthesis of Fe3O4 nanoparticles: temperature and atmosphere Effect

Articles

Synthesis of Fe3O4 nanoparticles: temperature and atmosphere Effect [CET 2015]
Author(s)
Ebrahim GHasemi
ABSTRACT
In this study, the magnetite (Fe3O4) nanoparticles were synthesized via chemical coprecipitation method. The effects of synthesis temperature and atmosphere on the size and magnetic properties of them were investigated. The precipitation occurred by pH adjustment of ferrous/ferric mixed salt-solution with ammonium hydroxide addition. The synthesis was performed in the temperature range of 25C to 80C in air and nitrogen (N2) protected atmospheres. The magnetite nanoparticles were characterized by X-ray powder diffraction, alternative gradient force magnetometer and transmission electron microscopy analysis. The crystallite size was calculated via Scherrer formula. The results showed that the magnetite is the major phase for all temperatures and for both of the atmospheres. It was revealed that the temperature is effective for enhancement of the magnetite phase formation and magnetic properties when the synthesis is done in ambient atmosphere but is not so effective when it is done in N2 atmosphere. Respect to synthesis temperature, the saturation magnetization was obtained 31 - 66 emu/g and 69 -72emu/g for ambient and inert atmosphere respectively.
KEYWORDS
Fe3O4 nanoparticles, temperature and atmosphere Effect
References