Title :
The relationship between Mn-Zn ferrites with different iron ion contents and the absorption energy in X-band
Author :
Gama, Adriana Medeiros ; Rezende, Mirabel Cerqueira
Author_Institution :
Instituto Technol. de Aeronaut., Brazil
Abstract :
Ferrites of (Mn+Zn)1-xFe2+xO4+δ 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)1-xFe2+xO4+δ - 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.
Keywords :
ceramics; eddy current losses; electromagnetic wave absorption; ferrites; magnetic leakage; magnetic permeability; manganese compounds; reflectivity; zinc compounds; (MnZn)1-xFe2+xO4+δ; 8.0 to 12.0 GHz; absorption energy; ceramic technique; energy absorption; iron ion contents; magnetic losses; magnetic permeability; reflectivity measurements; waveguide technique; Absorption; Ceramics; Ferrites; Frequency; Iron; Magnetic losses; Performance evaluation; Permeability; Reflectivity; Zinc oxide;
Conference_Titel :
Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on
Print_ISBN :
0-7803-9341-4
DOI :
10.1109/IMOC.2005.1580009
