Compósitos de ferrita de Ni-Zn com policloropreno para utilização como materiais absorvedores de radar para a banda S

Paulo, E. G.; Pinho, Marcelo; Lima, Roberto da Costa; Gregori, Maria Luisa; Ogasawara, Tsuneharu

doi:10.1590/s0366-69132004000200014

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…These materials have been used in several areas, such as telecommunication in cellular telephones and reception/transmission antennas. Studies done by Paulo et al [6] developed a RAM based on Ni-Zn ferrite into a polychloroprene matrix. The composite showed high RAM performance with a microwave absorption that was greater than 96.9% (À15 dB).…”

Section: Introductionmentioning

confidence: 99%

Ni–Zn nanoferrite for radar-absorbing material

Lima

Nasar

et al. 2008

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Ni–Zn nanoferrite for radar-absorbing material

Lima

Nasar

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…The magnetic loss is caused mainly by natural resonance, which is in good agreement with the Kittel equation results. Various magnetic materials have been used to absorb electromagnetic wave, but they are limited to three types, such as hexaferrites, spinel ferrites and garnet [3,10]. Fe 3 O 4 has attractive physical properties, namely, superparamagnetism, high coercivity, low Curie temperature, high magnetic susceptibility, strong spin polarization, etc.…”

Section: Introductionmentioning

confidence: 99%

Iron oxide/titania composites for radar absorbing material (RAM) applications

et al. 2019

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Iron oxide/titania composites were synthesized by precipitation method. Amount of iron oxide was varied in the composites. The single phase (anatase) was obtained for the weight ratio of 0-20% and three phases (anatase, magnetite and hematite) were found for the weight ratio of 30% and 40% of iron oxide. The crystallite size of titania decreased with increasing of iron oxide content. The specific surface area, total pore volume and BJH pore volume of the sample increased with increasing iron oxide content in the composite. The composites possessed mesoporous characteristic (6.5-9.6 nm in pore diameter) and exhibited ferromagnetic properties. The measurement of the microwave absorption showed that the 40Fe/Ti composite had the best reflection loss of -14 dB at a frequency of 10.9 GHz. This meant that the electromagnetic wave was absorbed 80% in that frequency. Thus, the developed material can be a promising microwave absorbing agent in radar signature reduction.

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“…Absorbing material of electromagnetic radiation (RAM) consists of compounds with high energy loss, which promote attenuation of electromagnetic radiation incident frequency tuned and dissipate the energy absorbed in the form of heat, decreasing or almost eliminating the energy required to the echo signal detection by radar [1].…”

Section: Introductionmentioning

confidence: 99%

Development of Polyamide 6/Ferrite Composites for Absorbers of Electromagnetic Radiation

Bezerra

Silva

Araújo

et al. 2010

MSF

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Composites consist of a mixture or combination of the two or more, micro or macro constituents that differ in shape and chemical composition and, in essence, are insoluble in one another. The polyamide is a polymer that presents dimensional stability, good resistance to impact without notch and excellent chemical resistance. Already the ferrites are absorbers of electromagnetic radiation and have versatility to be used as a composite of ferrites. The composite of polyamide6/ferrite was obtained by mixing 10 and 30wt.% of ferrite added to polyamide 6 in a Torque Rheometer Haake. The objective of this work was to develop of polyamide6/ferrite composites to be used as absorbers of electromagnetic radiation. The results were very promising and showed that occurs interaction between the ferrite and polyamide6.

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Compósitos de ferrita de Ni-Zn com policloropreno para utilização como materiais absorvedores de radar para a banda S

Cited by 5 publications

References 8 publications

Ni–Zn nanoferrite for radar-absorbing material

Ni–Zn nanoferrite for radar-absorbing material

Iron oxide/titania composites for radar absorbing material (RAM) applications

Development of Polyamide 6/Ferrite Composites for Absorbers of Electromagnetic Radiation

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