PREPARATION OF Single and multilayer RAMs of (Ni 0.4 Zn 0.6) 1-x (Fe2O3) 1+x Ferrite And studying Its  Electrical And Magnetic Properties

AHMED RAFEEQ, Dr

	PREPARATION OF Single and multilayer RAMs of (Ni 0.4 Zn 0.6) 1-x (Fe2O3) 1+x Ferrite And studying Its Electrical And Magnetic Properties
Diyala Journal For Pure Science
Article 1, Volume 9, Issue 3, 2013, Pages 1-10
Author
Dr AHMED RAFEEQ
Abstract
Composite RAM materials single and multi layer at x-Band frequencies (8-12.5GHz) were prepared by using ferrite of spindle type( Ni0.4 Zn 0.6) 1-x (Fe2o3)1+x as a filler and resins as matrix. The attenuation properties of the used ferrite (Ni0.4 Zn 0.6) 1-x (Fe2o3)1+x in our work such as reflection loss (-dB) and tangent loss tan δμ ,tan δE and the angle of loss δμ δE were studied carefully. Power technology Method used in our work to prepare the ferrite at sintering temperature 1300 as Filler for composite absorber. Attenuation character istic test was done by using slotted waveguide system show that ferrite mentioned above . having maximum attenuation (-29.4dB) at frequency 11.8GHz and (-20.8 dB ) at frequency 11.4 GHz (-34.1 dB) at frequency (10.2 GHz) and (-46.06) at frequency (10GHz) for different values of (x) .To increase the bandwidth frequencies we prepared multi layer absorber by using epoxy or PU resins as a matrix and add carbon- black powders to build multi-layer ferrite composites .We found that we have built excellent multi- layer RAMs with attenuation Greater than (-10dB) consisted of four layers less than 4mm thickness to cover the X-band frequencies with broadband width equal 3,5 GHz.
Keywords
pipettes radar; the ceramic method; magnetic and electrical properties

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