Comparative Study of Single- and Double-Layer BaFe12O19-GraphiteNanocomposites for Electromagnetic Wave Absorber Applications

Ismayadi, Ismail and Idza Riati, Ibrahim and Khamirul Amin, Matori and Zaiki, Awang and Muhammad Misbah, Muhammad Zulkimi and Fadzidah, Mohd Idris and Rodziah, Nazlan and Raba’ah Syahidah, Azis and Mohd Hafiz, Mohd Zaid and Siti Nor Ain, Rusly and Ertugrul, Mehmet (2020) Comparative Study of Single- and Double-Layer BaFe12O19-GraphiteNanocomposites for Electromagnetic Wave Absorber Applications. Materials Research Bulletin, 126. pp. 1-10.

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Abstract

The development of stealth technology for military applications and increasing concerns of electromagnetic pollution have garnered interest to design microwave absorbing materials with wide absorption bandwidth and effective absorption properties. Two batches of samples as a potential radar absorbing material were prepared in this study: single-layer and double-layer nanocomposite mixtures of graphite and barium hexaferrite nanoparticles. Characterizations of electromagnetic and microwave absorbing properties were carried out in the frequency range of 8−12 GHz (X-band) and 12−18 GHz (Ku-band). Single-layer samples with thickness of 2 mm showed optimal absorption properties with minimum reflection loss of -20.5 dB at 11.8 GHz for X-band and -20.7 dB at 14.7 GHz for Ku-band, displaying bandwidths of 0.6 GHz for the former and 3.8 GHz for the latter at -10 dB. On the other hand, double-layer samples made of 1 mm thick barium hexaferrite matching layer and 2 mm thick graphite absorbing layer showed optimal absorption properties with minimum reflection loss of -30.0 dB at 9.2 GHz for X-band with narrower bandwidth of 0.6 GHz. The microwave absorption properties of these nanocomposites were attributed to combined effect of dielectric loss from graphite and magnetic loss from ferrite.

Item Type: Article
Uncontrolled Keywords: Barium hexaferrite, Reflection loss, Microwave absorbers, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: Q Science > Q Science (General)
Divisions: Academic Faculties, Institutes and Centres > Centre for Pre-University Studies
Depositing User: Tuah
Date Deposited: 06 Oct 2020 02:01
Last Modified: 06 Oct 2020 02:01
URI: http://ir.unimas.my/id/eprint/32095

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