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The effect of agarose content on the morphology, phase evolution, and magnetic properties of CoFe 2 O 4 nanoparticles prepared by sol‐gel autocombustion method
Author(s) -
Rouhani Amir Reza,
EsmaeilKhanian Amir Hossein,
Davar Fatemeh,
Hasani Saeed
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12832
Subject(s) - materials science , coercivity , agarose , fourier transform infrared spectroscopy , spinel , sol gel , nanoparticle , nitric acid , analytical chemistry (journal) , agarose gel electrophoresis , citric acid , phase (matter) , diffraction , powder diffraction , chemical engineering , nuclear chemistry , nuclear magnetic resonance , nanotechnology , chromatography , metallurgy , chemistry , optics , organic chemistry , biochemistry , physics , engineering , gene , condensed matter physics
Hard‐magnetic CoFe 2 O 4 nanoparticles were produced with the sol‐gel autocombustion route using agarose and citric acid as a neutral organic gel and combustion agent. For this purpose, the obtained gel is annealed at 800°C for 3 hours and then the spinel structure of the samples was confirmed by X‐ray diffraction ( XRD ). In addition, the existence of metal‐oxygen complexes in the gel and nanoparticles was investigated by Fourier transformation infrared ( FTIR ) spectra. Furthermore, FESEM images showed that semispherical and rod‐like particles were obtained by variation in agarose contents. For the rod‐like sample with 2.5 g agarose, the saturation magnetization and coercivity were measured equal to 71.7 emu/g and 10076.84 Oe, respectively.