SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY

To tackle the issue of electromagnetic (EM) pollution and EM interference, fabrication of advanced, novel and superior microwave absorbing materials (MAM) with high EM wave absorption, wide absorption bandwidth, lightweight and cost-efficient have received huge attention. To date, magnetite (Fe3O...

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Main Author: ADEBAYO, LAWAL LANRE
Format: Thesis
Language: English
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-utpedia.20522 /
Published: 2020
Subjects:
Q Science (General)
Online Access: http://utpedia.utp.edu.my/20522/1/Lawal%20Lanre%20Adebayo_17010034.pdf
http://utpedia.utp.edu.my/20522/
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spelling utp-utpedia.205222021-08-30T16:29:43Z http://utpedia.utp.edu.my/20522/ SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY ADEBAYO, LAWAL LANRE Q Science (General) To tackle the issue of electromagnetic (EM) pollution and EM interference, fabrication of advanced, novel and superior microwave absorbing materials (MAM) with high EM wave absorption, wide absorption bandwidth, lightweight and cost-efficient have received huge attention. To date, magnetite (Fe3O4) is being thoroughly investigated as MAM, due to its exceptional dual EM properties (permittivity and permeability), and proper saturation magnetization. However, large density and impedance mismatch are some of the limiting factors that hinder its EM wave absorption performance (EMAP). Hence, with the expectation of an efficient microwave absorbing materials, the aim of this research is to prepare Fe3O4-filled composites as enhanced MAM. Fe3O4 nanoparticles were prepared by a facile sol-gel method. Citric acid-coated Fe3O4 nanocomposites were prepared by coprecipitation method. Three-dimensional carboncoated Fe3O4 composites (3DC@Fe3O4) were prepared by hydrothermal method. Several characterization techniques were used to study the physiochemical properties of the samples and the results were analyzed and presented. The EMAP of all samples were studied at X-band (8.2-12.4 GHz) and Ku-band (12.4-18.0 GHz) Frequency range. The 3DC@Fe3O4 composites display and enhanced EMAP with a minimum RL value of -46.4 dB at 16.85 GHz with 2.0 mm absorber thickness. These good EMAP could be attributed to structural advantages as well as favorable impedance matches derived from the synergistic effect of proper dielectric loss from carbon microspheres and magnetic loss contribution from Fe3O4 nanoparticles. 2020-06 Thesis NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/20522/1/Lawal%20Lanre%20Adebayo_17010034.pdf ADEBAYO, LAWAL LANRE (2020) SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY. Masters thesis, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
collection UTPedia
language English
topic Q Science (General)
spellingShingle Q Science (General)
ADEBAYO, LAWAL LANRE
SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
description To tackle the issue of electromagnetic (EM) pollution and EM interference, fabrication of advanced, novel and superior microwave absorbing materials (MAM) with high EM wave absorption, wide absorption bandwidth, lightweight and cost-efficient have received huge attention. To date, magnetite (Fe3O4) is being thoroughly investigated as MAM, due to its exceptional dual EM properties (permittivity and permeability), and proper saturation magnetization. However, large density and impedance mismatch are some of the limiting factors that hinder its EM wave absorption performance (EMAP). Hence, with the expectation of an efficient microwave absorbing materials, the aim of this research is to prepare Fe3O4-filled composites as enhanced MAM. Fe3O4 nanoparticles were prepared by a facile sol-gel method. Citric acid-coated Fe3O4 nanocomposites were prepared by coprecipitation method. Three-dimensional carboncoated Fe3O4 composites (3DC@Fe3O4) were prepared by hydrothermal method. Several characterization techniques were used to study the physiochemical properties of the samples and the results were analyzed and presented. The EMAP of all samples were studied at X-band (8.2-12.4 GHz) and Ku-band (12.4-18.0 GHz) Frequency range. The 3DC@Fe3O4 composites display and enhanced EMAP with a minimum RL value of -46.4 dB at 16.85 GHz with 2.0 mm absorber thickness. These good EMAP could be attributed to structural advantages as well as favorable impedance matches derived from the synergistic effect of proper dielectric loss from carbon microspheres and magnetic loss contribution from Fe3O4 nanoparticles.
format Thesis
author ADEBAYO, LAWAL LANRE
author_sort ADEBAYO, LAWAL LANRE
title SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
title_short SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
title_full SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
title_fullStr SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
title_full_unstemmed SYNTHESIS OF MAGNETITE-FILLED NANOCOMPOSITE AS ELECTROMAGNETIC WAVE ABSORBING MATERIALS AT X- AND KUBAND FREQUENCY
title_sort synthesis of magnetite-filled nanocomposite as electromagnetic wave absorbing materials at x- and kuband frequency
publishDate 2020
url http://utpedia.utp.edu.my/20522/1/Lawal%20Lanre%20Adebayo_17010034.pdf
http://utpedia.utp.edu.my/20522/
_version_ 1741195631013134336
score 11.62408

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