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Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique

The purpose of this study was to synthesize high-quality recycled α-Fe2O3 to improve its complex permittivity properties by reducing the particles to nanosize through high energy ball milling. Complex permittivity and permeability characterizations of the particles were performed using open-ended co...

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Main Authors: Mensah, Ebenezer Ekow, Abbas, Zulkifly, Azis, Raba'ah Syahidah, Khamis, Ahmad Mamoun
Format: Article
Language:English
Published: MDPI 2019
Online Access:http://psasir.upm.edu.my/id/eprint/38364/1/38364.pdf
http://psasir.upm.edu.my/id/eprint/38364/
https://www.mdpi.com/1996-1944/12/10/1696
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spelling my.upm.eprints.383642020-05-04T16:23:39Z http://psasir.upm.edu.my/id/eprint/38364/ Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique Mensah, Ebenezer Ekow Abbas, Zulkifly Azis, Raba'ah Syahidah Khamis, Ahmad Mamoun The purpose of this study was to synthesize high-quality recycled α-Fe2O3 to improve its complex permittivity properties by reducing the particles to nanosize through high energy ball milling. Complex permittivity and permeability characterizations of the particles were performed using open-ended coaxial and rectangular waveguide techniques and a vector network analyzer. The attenuation characteristics of the particles were analyzed with finite element method (FEM) simulations of the transmission coefficients and electric field distributions using microstrip model geometry. All measurements and simulations were conducted in the 8–12 GHz range. The average nanoparticle sizes obtained after 8, 10 and 12 h of milling were 21.5, 18, and 16.2 nm, respectively, from an initial particle size of 1.73 µm. The real and imaginary parts of permittivity increased with reduced particle size and reached maximum values of 12.111 and 0.467 at 8 GHz, from initial values of 7.617 and 0.175, respectively, when the particle sizes were reduced from 1.73 µm to 16.2 nm. Complex permeability increased with reduced particle size while the enhanced absorption properties exhibited by the nanoparticles in the simulations confirmed their ability to attenuate microwaves in the X-band frequency range. MDPI 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/38364/1/38364.pdf Mensah, Ebenezer Ekow and Abbas, Zulkifly and Azis, Raba'ah Syahidah and Khamis, Ahmad Mamoun (2019) Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique. Materials, 12 (10). art. no. 1696. pp. 1-12. ISSN 1996-1944 https://www.mdpi.com/1996-1944/12/10/1696 10.3390/ma12101696
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description The purpose of this study was to synthesize high-quality recycled α-Fe2O3 to improve its complex permittivity properties by reducing the particles to nanosize through high energy ball milling. Complex permittivity and permeability characterizations of the particles were performed using open-ended coaxial and rectangular waveguide techniques and a vector network analyzer. The attenuation characteristics of the particles were analyzed with finite element method (FEM) simulations of the transmission coefficients and electric field distributions using microstrip model geometry. All measurements and simulations were conducted in the 8–12 GHz range. The average nanoparticle sizes obtained after 8, 10 and 12 h of milling were 21.5, 18, and 16.2 nm, respectively, from an initial particle size of 1.73 µm. The real and imaginary parts of permittivity increased with reduced particle size and reached maximum values of 12.111 and 0.467 at 8 GHz, from initial values of 7.617 and 0.175, respectively, when the particle sizes were reduced from 1.73 µm to 16.2 nm. Complex permeability increased with reduced particle size while the enhanced absorption properties exhibited by the nanoparticles in the simulations confirmed their ability to attenuate microwaves in the X-band frequency range.
format Article
author Mensah, Ebenezer Ekow
Abbas, Zulkifly
Azis, Raba'ah Syahidah
Khamis, Ahmad Mamoun
spellingShingle Mensah, Ebenezer Ekow
Abbas, Zulkifly
Azis, Raba'ah Syahidah
Khamis, Ahmad Mamoun
Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
author_facet Mensah, Ebenezer Ekow
Abbas, Zulkifly
Azis, Raba'ah Syahidah
Khamis, Ahmad Mamoun
author_sort Mensah, Ebenezer Ekow
title Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
title_short Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
title_full Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
title_fullStr Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
title_full_unstemmed Enhancement of complex permittivity and attenuation properties of recycled hematite (α-Fe2O3) using nanoparticles prepared via ball milling technique
title_sort enhancement of complex permittivity and attenuation properties of recycled hematite (α-fe2o3) using nanoparticles prepared via ball milling technique
publisher MDPI
publishDate 2019
url http://psasir.upm.edu.my/id/eprint/38364/1/38364.pdf
http://psasir.upm.edu.my/id/eprint/38364/
https://www.mdpi.com/1996-1944/12/10/1696
_version_ 1665895979189010432
score 13.211869

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