Research Team: Dr. Emad K. Al-Shakarchi

Project Field: Material

Project Title: Preparation and Characterization of Li1-x(Zn,Ca)xFe5-y (Ni,Cd)yO8 Substituted by Isovalent Substitutions .

Success Factors

• For many years, Li ferrites have been prominent in the microwave ferrite core industry because with high Curie temperature of about (670C), and high resistivity of about(109 ohm.cm)a combined with high initial permeabilities and saturation inductions of order (103 gauss) in comparable with (10-5  ohm-cm) and (104 gauss) for ferromagnetic metals.
• Resistivity has an important effect on electric and magnetic properties of ferrites. In some microwave device applications the nonlinearities impair the performance of ferrites at high-power levels Lithium ferrite is an important material for applications at microwave frequencies especially as isolators, circulators, gyrators etc., with spinel ferrites behavior and low ferrimagnetic resonance line width.
• Ferrites are especially useful in the electronics industry due to two key characteristics: firstly, high magnetic permeability which concentrates and reinforces the magnetic field and secondly, high electrical resistivity which limits the amount of electric current flow in the ferrite

Mission:

• To produce ultra fine powder in the composition Li1-x(Zn,Ca,)xFe5-y(Ni,Cd)yO8with isovalent substitution with respect to Li by (Zn,Ca) and Fe by (Ni,Cd) with (x=0-0.5), and (y=0-0.5) and finding preferable composition in the designing ferrimagnetic pellets that applied with smaller saturation magnetic moments are useful in microwave applications and in high-density recording.
• Producing a fine and homogenous powder of Lithium Ferrite (LiFe5O8) without any substitution by freeze drying method, and studying the physical properties through different techniques such as; the X-ray diffraction (XRD), Fourier Transform Infrared spectrum (FTIR), and Magnetic properties represented by susceptibility measurements to determine the soft ferrites properties of materials.