Synthesis and characterization of copper substituted lithium nano ferrites by sol-gel auto combustion

الملخص EN

In this work sol-gel method used for preparing nanoscale iron oxide ferrites dopant by copper and lithium, which carries the chemical formula Li1-xCuxFe5O8 where x is the added ratio as molar ratio (x = 0,0.1,0.2,0.3,0.4,0.5,0.6 and 1), during the self- combustion for sol-gel which happen at temperature of 200oC, after that the samples were divided into four groups , the first group namely that have not been annealed while the other groups ; the second, third and fourth were annealed at 500oC , 700oC and 900oC respectively.

In this work the crystalline structure have a dominate phases which have been studied by using the X-ray diffraction as well as examination of the electron microscope and examine the infrared - mediated model of Fourier Transform Infrared Spectrometer either the topography of the surface has been studied by using an atomic force microscope, examine the properties of electrical capacitive mediated capacitance measuring device, resistance and the inductor also studied.

And indirectly through these tests was to know the size of the structural unit of the crystal density theory and fixed lattice, as well as the size of the grain has been measured by X-ray diffraction, while a microscopic blocs have checked mediated electron microscopy scan scanner, either measuring the size of the granules on the surface of the sample and the coefficient of roughness has been measured mediated by an atomic force microscope and the type of bonds that bind atoms in the crystal and the type of crystalline eccentric may checked mediated infrared while measuring the properties of capacitive and portability electrical conductivity of the alternating current it may have been mediated by checking capacitive properties.

he current study focuses on measuring the properties of capacitive, which takes into account the effect of changing the copper content in the samples and the degree of sintering temperature as well as the change altered applied to the samples from the external voltage source, as well as the loss of electric power when the power is in the passage of the samples