The relationship between Mn-Zn ferrites with different iron ion contents and the absorption energy in X-band

Ferrites of (Mn+Zn)/sub 1-x/Fe/sub 2+x/O/sub 4+/spl delta// type can be used in space, aeronautical, telecommunication and medical fields, due to their high magnetic permeability and low magnetic losses. This work intends to correlate the Mn/Zn and Fe/(Mn+Zn) ratios of these ferrites with the absorp...

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Bibliographic Details
Main Authors: Gama, A.M., Rezende, M.C.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Ceramics
Ferrites
Frequency
Iron
Magnetic losses
Performance evaluation
Permeability
Reflectivity
Zinc oxide
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Summary:Ferrites of (Mn+Zn)/sub 1-x/Fe/sub 2+x/O/sub 4+/spl delta// type can be used in space, aeronautical, telecommunication and medical fields, due to their high magnetic permeability and low magnetic losses. This work intends to correlate the Mn/Zn and Fe/(Mn+Zn) ratios of these ferrites with the absorption of energy in the frequency range of 8.0 to 12.0 GHz. Considering this purpose, this work evaluates the absorption of energy of ferrites of (Mn+Zn)/sub 1-x/Fe/sub 2+x/O/sub 4+/spl delta// - type for x = -0.1; 0; 0.05; 0.1; 0.2. Ten samples were prepared maintaining the molar fraction of zinc oxide constant at 18% and 25%. The samples were prepared by conventional ceramic technique. The characterization was performed by reflectivity measurements using the waveguide technique.
DOI:10.1109/IMOC.2005.1580009