The effect of catalyst type on the microstructure and magnetic properties of synthesized hard cobalt ferrite nanoparticles

الملخص EN

A sol-gel process prepared the nanoparticles of hard cobalt ferrite (CoFe2O4).

Cobalt nitrate hexahydrate(Co (NO3)2⋅6H2O), iron nitrate nonahydrate(Fe (NO3)3⋅9H2O) with using two catalysis acid (citric acid) and alkaline (hydroxide ammonium) were used as precursor materials.

Crystallization behavior of the CoFe2O4 nanoparticleswere studied by X-ray diffraction (XRD).

Nanoparticles phases can change from amorphous to spinel ferrite crystalline depending on the calcinated temperature at 600°C, with using citric acid as a catalysis without finding forgone phase, while using hydroxide ammonium was shown second phase (α-Fe2O3) with CoFe2O4.

Crystallite size was measured by Scherrer’s formula about (25.327) nm and (27.119) nm respectively.

Structural properties were investigated by FTIR,which was appeared main bond of (Fe-O), (Co-O), (C-O), and (H-O).Scanning electron microscopy (FE- SEM) was shown the microstructure observation of cobalt ferrite and the particle size at the range about (28.77-42.97) nm.

Magnetization measurements were carried out on a vibrating sample magenometer (VSM) that exhibited hard spinel ferrite.