Electromagnetic Absorbers
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Nanoparticles of Ni1-x Znx Fe2 O4 used as Microwave Absorbers in the X-band
Ferrites nanoparticles of Ni1-xZnxFe2O4 ferrites with x varying between 0 and 1, in steps of 0.2, were obtained by solution combustion synthesis (SCS) and dispersed in oil paint at the concentrations of 10, 20, 30 and 40% by ferrite weight of ferrite, with the aim of producing electromagnetic wave absorbing composites, in the X band (8-12 GHz). The ferrite p
Mat. Res.. Publicado em: 21/10/2019
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2. Design of Microwave Absorbers using Improvised Particle Swarm Optimization Algorithm
Abstract Particle Swarm Optimization (PSO) algorithm has been applied in electromagnetics to design microwave absorbers. Generally, microwave absorbers are used for absorbing the electromagnetic radiation caused due to numerous electronic equipments and is being extensively used in stealth technology. The main aim of this paper is to find and analyze the min
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-06
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3. Performance Prediction of Microwave Absorbers Based on POMA/Carbon Black Composites in the Frequency Range of 8.2 to 20 GHz
ABSTRACT: This paper presents a comparative study involving experimental and numerical behaviors of radar absorbing materials (RAM), based on conducting composites of poly(o-methoxyaniline) (POMA) and carbon black (CB). Samples of POMA/CB in epoxy resin matrix were prepared. First, these samples were experimentally characterized by electric permittivity and
J. Aerosp. Technol. Manag.. Publicado em: 29/03/2018
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4. Mechanical, Magnetic, and Microstructural Characterization of Ni0.9Co0.1Fe2O4 Produced by the Ceramic Method
Ni-Co ferrites, especially the ones with lower cobalt fractions, are candidate materials for applications in magnetomechanical sensors and electromagnetic wave absorbers. This work studied the microstructure, magnetostriction, flexural strength, and complex magnetic permeability of Ni0.9Co0.1Fe2O4, presenting data that weren't covered by previous literature
Mat. Res.. Publicado em: 22/02/2018
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5. Reflectivity of Hybrid Microwave Absorbers Based on NiZn Ferrite and Carbon Black
Abstract: This study had as main objective to show that the adequate combination of magnetic and dielectric particles can improve the radar absorbing materials performance. For this, formulations of polyurethane resin loaded with carbon black and NiZn ferrite, with general composition MFe2O4, where M = Ni, Zn or both elements, homogenized by conventional mec
J. Aerosp. Technol. Manag.. Publicado em: 2012-09
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6. Materiais absorvedores de radiação eletromagnética baseados em negro de fumo e papel celulóstico (8,2-12,4 GHz)
Os materiais absorvedores de radiação eletromagnética (MARE) têm recebido muita atenção nas últimas quatro décadas, devido à crescente utilização para atender as exigências das legislações governamentais no controle de níveis de radiação eletromagnética espúria emitida por equipamentos eletrônicos, das normas industriais de compatibilidad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/04/2008