Synthesis of nano-dimensional cobalt-zinc ferrites by the low-temperature spray-drying with subsequent thermolysis

Synthesis and Structural Properties of Bismuth Doped Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

A series of Bismuth doped Cobalt nanoferrites of chemical composition CoBixFe2-xO4 (where x = 0.00, 0.05, 0.10, 0.15, 0.20 & 0.25) were prepared by sol-gel combustion method and calcinated at 600 ̊C. The structural and morphological studies were carried out by using X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive Spectroscopy...

LOW TEMPERATURE MOLTEN SALT SYNTHESIS OF NANO CRYSTALLINE MgAl2O4 POWDER

Abstract: composition of MgO and nano boehmite. The reactant and potassium chloride, as the reaction media, were fired at800-1000 °C at different dwell times (0.5-5 h) in the ambient atmosphere. After washing and filtration, the spinel nanopowder was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. It was demonstrated tha...

Plasma Synthesis of Facetted Nickel nano-Ferrites with Controlled Stoichiometry

The Low Temperature Transformation in Ferrites

The general behavior of majrn»!it< (iron ferrite) at its low temperature transformation (ca 1!8°K) is reviewed. One of the properties which undergoes a largr change is the magnetocrystailine snisotropy, which is larger in magnitude and has a lower symmetry below the transformation. The magnetic symmetry axis below the transition tempeiature can be predetermined by cooling a single crystal throu...

Temperature dependence of spin resonance in cobalt substituted NiZnCu ferrites

Cobalt substitutions were investigated in Ni0.4Zn0.4Cu0.2Fe2O4 ferrites, initial complex permeability was then measured from 1 MHz to 1 GHz. It appears that cobalt substitution led to a decrease of the permeability and an increase of the μs×fr factor. As well, it gave to the permeability spectrum a sharp resonance character. We also observed a spin reorientation occuring at a temperature depend...