Study of optical properties of calcium and zinc ferrite as radar absorbent materials

In this work, two types of spinel ferrite were prepared they are calcium ferrite with the chemical formula (CaFe2O4) and zinc ferrite with the chemical formula (ZnFe2O4), and ferrite samples were prepared by the traditional ceramic techniqueusing oxides of materials: CaO, ZnO and Fe2O3. The samples...

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Bibliographic Details
Main Authors: John, Hussein Taqi, Hassani, Ruaa H., Jaber, Ali Abed
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Attenuation coefficients
Calcium ferrites
Density
Frequency ranges
Microwaves
Optical properties
Radar absorbers
Resonance scattering
Sintering
Superhigh frequencies
Temperature
Zinc ferrites
Zinc oxide
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Summary:In this work, two types of spinel ferrite were prepared they are calcium ferrite with the chemical formula (CaFe2O4) and zinc ferrite with the chemical formula (ZnFe2O4), and ferrite samples were prepared by the traditional ceramic techniqueusing oxides of materials: CaO, ZnO and Fe2O3. The samples were sintered at two sintering temperatures (T=1250, 1300)oC, and the optical properties of the two types of ferrite for microwaves within the X-band and the frequency range (8-12) GHz were studied. The reflection, absorption, and attenuation coefficients were studied as a function of frequency using the scattering coefficients S11, S21. In all shapes, the best resonance peaks were obtained for this coefficients of the two types of ferrite and both sintering temperatures. The results we obtained in the case of sintering temperature,(T=1300) oC are better than sintering temperature, (T=1250) oC, and this is evidence of the effect of sintering temperature on the purity of ferrate material from impurities and secondary phases. We also note that the results of zinc ferrite are better than calcium ferrite because of the good optical properties of zinc ferrite. The cause for the absorption of ferrite materials is the rotation of the magnetic field for ferrite. Still, the absorbance of ferrite materials varies and depends on the type of ferrite and the materials that make up the ferrite compound. The structural properties showed that the density of the samples depends on the sintering temperature, as the density increases with the increase in the sintering temperature.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0183268