Synthesis and Characterization of Iron Oxide Nanoparticles by Solid State Chemical Reaction Method |
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Authors: | Hassan Karami |
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Institution: | (1) Nano Research Laboratory, Department of Chemistry, Payame Noor University (PNU), Abhar, Zanjan, Iran |
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Abstract: | The iron oxide nanoparticles were synthesized by solid state chemical reaction method. The synthesized powders were characterized
by XRD, SEM, EDAX and TG-DTA techniques. An average grain size of 10–20 nm for Maghemite and 80–85 nm for Hematite was calculated
using XRD line broadening and SEM. The effect of different parameters such as annealing temperature, milling time, Fe+3:Fe+2 concentration ratio have been investigated on the particle size and phase formation. Heat treatment of the produced powders
in which Fe+3:Fe+2 ratio equal to 2:1, resulted in tetragonal (Maghemite) and rombohedral (Hematite) structures at 300 and 600 °C, respectively.
It was found that by changing Fe+3:Fe+2 ratios from 2:1 to 1:2, hematite phase and from 2:1 to 1:1, Maghemite phase were formed at 300 °C. In addition with increasing
milling time, the iron oxide particle size decreases, but there was no changing in the kind of phase. |
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