Microwave Absorption Properties of Fe2O3 and Fe2O3/CNTs Nanocomposites

Authors

  • Madiha Fathi Elmahaishi Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia Author
  • Raba’ah Syahidah Azis Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia Author
  • Ismayadi Ismail Nanomaterials Synthesis and Characterization Laboratory (NSCL), Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia Author
  • Khamirul Amin Matori Department of Physics, Faculty of Science, UniversitiPutra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia Author
  • Farah Diana Muhammad Department of Physics, Faculty of Science, Universiti Putra Malaysia Serdang 43400, Selangor, Malaysia Author
  • Abdul Halim Shaari Department of Physics, Faculty of Science, Universiti Putra Malaysia Serdang 43400, Selangor, Malaysia Author
  • Mohd Mustafa Awang Kechik Department of Physics, Faculty of Science, Universiti Putra Malaysia Serdang 43400, Selangor, Malaysia Author
  • Kean Pah Lim Department of Physics, Faculty of Science, Universiti Putra Malaysia Serdang 43400, Selangor, Malaysia Author
  • Soo Kien Chen Department of Physics, Faculty of Science, Universiti Putra Malaysia Serdang 43400, Selangor, Malaysia Author

DOI:

https://doi.org/10.66514/ssst32-1-42-48

Keywords:

hematite (Fe2O3), carbon nanotubes (CNTs), reflection loss (RL), microwave absorption properties

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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Published

11-07-2024

Issue

Vol. 32 No. 1 (2024): Solid State Science and Technology

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.