Microwave absorption properties of Fe2O3 and Fe2O3/CNTs nanocomposites

Citation

Azis, Raba'ah Syahidah and Shaari, Abdul Halim and Awang Kechik, Mohd Mustafa and Lim, Kean Pah and Chen, Soo Kien and Muhammad, Farah Diana and Matori, Khamirul Amin and Ismail, Ismayadi and Elmahaishi, Madiha Fathi (2024) Microwave absorption properties of Fe2O3 and Fe2O3/CNTs nanocomposites. Solid State Science and Technology, 32 (2). pp. 42-48. ISSN 0128-7389

Abstract

The dielectric loss properties of recycled Fe2O3 (iron oxide nanoparticles, hematite) can be enhanced by using it as a catalyst for synthesizing carbon nanotubes (CNTs) from waste cooking oil. Hematite was successfully processed using the high-energy ball milling (HEBM) method for 12 h and sintered at 600 °C for 4 h. This work aimed to improve the electromagnetic (EM) wave absorption characteristics in the frequency range of 8−18 GHz by increasing interfacial polarization and dielectric loss resulting from the growth of CNTs. Our results indicated that Fe2O3/CNTs showed the highest microwave absorption, exceeding 99.9%, with a minimum reflection loss of –15.05 dB and an absorption bandwidth of 1.68 GHz. The microwave absorption properties of these nanocomposites were attributed to the combined effects of dielectric loss from CNTs and magnetic loss from hematite.

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Additional Metadata

Item Type:	Article
Divisions:	Faculty of Science Institut Nanosains dan Nanoteknologi
Publisher:	The Malaysian Solid-State Science and Technology Society
Keywords:	Hematite (Fe2O3); Carbon nanotubes (CNTs); Reflection loss (RL); Microwave absorption properties
Depositing User:	Ms. Zaimah Saiful Yazan
Date Deposited:	07 Aug 2025 01:50
Last Modified:	07 Aug 2025 01:50
URI:	http://psasir.upm.edu.my/id/eprint/119171
Statistic Details:	View Download Statistic

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