Microstructural and magnetic properties of core-shell FeSiAl composites with Ni0.4Zn0.45Co0.15Fe2O4 layer by sol-gel method

FeSiAl/Ni0.4Zn0.45Co0.15Fe2O4 ferrite core-shell particles and cylindrical magnetic cores have been synthesized by sol-gel auto-combustion method. The magnetic cores were prepared by pellet molding process and high temperature annealing at 700 degrees C for 1 h. The reaction, surface morphology and magnetic properties of FeSiAl/Ni0.4Zn0.45CoFe2O4 ferrite cores have been investigated by Differential thermal analysis-thermogravimetry (DTATG), X-ray diffraction (XRD), the impedance analyzer and Vibration sample magnetometer (VSM). The results indicates that there are three stages to form ferrite. The cores of unphosphated FeSiAl/Ni0.4Zn0.45CoFe2O4 ferrite will be oxidized in air at 700 degrees C. The spinel ferrites are successfully prepared by sol-gel and form a homogeneous as well as porous structure on the surface of the cores. The maximum permeability is 41 at 6 wt% ferrite. Ms decreases from 106.6 emu/g to 103.6 emu/g, with the increase of ferrite content.

Automated summary

FeSiAl/Ni0.4Zn0.45Co0.15Fe2O4 ferrite core-shell particles and cylindrical magnetic cores were synthesized by sol-gel auto-combustion method. The research focused on the reaction, surface morphology, and magnetic properties of these materials, with the results showing three stages to form ferrite and successful preparation of spinel ferrites with a homogeneous and porous structure. The maximum permeability was found to be 41 at 6 wt% ferrite, while Ms decreased with increasing ferrite content.