SHABRINA FITRIANI, NUR (2025) SINTESIS DAN KARAKTERISASI KOMPOSIT Fe3O4/rGO UNTUK APLIKASI RADAR ABSORBING MATERIAL. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
Indonesia with its vast maritime territory and strategic geographical location as an international trade route, can potentially pose a security threat in the border region. Therefore, to minimize the reflection of radar waves so as not to be detected by the enemy, the author conducts stealth technology research that focuses on aspects of coating methods based on radar wave absorbing material (RAM). Fe3O4/rGO composite has been synthesized using coprecipitation method and liquid-based exfoliation method with various compositions, namely rGO, Fe3O4, Fe3O4/rGO (2:1), (1:1), and (1:2). The rGO material used is natural material from coconut shells. Characterization of the synthesis was carried out using X-Ray Diffraction (XRD), Fourier Transform-Infra Red (FT-IR), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), Vibrating Sample Magnetometer (VSM) and Vector Network Analyzer (VNA) to analyze the structure, magnetic properties and performance in wave absorption. XRD results showed the presence of mixed Fe3O4/rGO peaks and a decrease in the crystallite size of Fe3O4/rGO, as the composition of rGO increased. FT-IR results confirmed the presence of reduced oxygen functional groups and Fe-O functional groups in Fe3O4/rGO, as well as a shift in Fe-O bond vibrations. SEM-EDX results confirm that Fe3O4/rGO has been successfully composite characterized by the presence of Fe, O, and C elements. VSM results confirm that Fe3O4 and Fe3O4/rGO composites have soft ferromagnetic properties that are ideal for RAM applications. After compositing with rGO, the saturation magnetization and remanent magnetization values decreased, but the coercivity field increased. VNA results show that in the C-band and X-band frequency ranges, Fe3O4 material has the potential to be applied to RAM due to its low RL value, as well as a very high percentage of microwave absorption.
| Item Type: | Thesis (S1) | ||||||||||||
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| Additional Information: | Indonesia dengan wilayah maritim yang luas dan letak geografis strategis sehingga dijadikan sebagai jalur perdagangan internasional, dapat berpotensi menimbulkan ancaman keamanan di wilayah perbatasan. Oleh karena itu, untuk memperkecil pantulan gelombang radar agar tidak terdeteksi oleh musuh, penulis melakukan penelitian stealth technology yang berfokus pada aspek metode pelapisan berbasis material penyerap gelombang radar (RAM). Telah dilakukan sintesis komposit Fe3O4/rGO menggunakan metode kopresipitasi dan metode eksfoliasi berbasis liquid dengan variasi komposisi, yaitu rGO, Fe3O4, Fe3O4/rGO (2:1), (1:1), dan (1:2). Bahan rGO yang digunakan berupa bahan alam dari tempurung kelapa (coconut shells). Karakterisasi hasil sintesis dilakukan dengan menggunakan X–Ray Diffraction (XRD), Fourier Transform-Infra Red (FT-IR), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), Vibrating Sample Magnetometer (VSM) dan Vector Network Analyzer (VNA) untuk menganalisa struktur, sifat kemagnetan dan performa dalam penyerapan gelombang. Hasil XRD menunjukkan adanya puncak campuran Fe3O4/rGO dan terjadinya penurunan ukuran kristalit pada Fe3O4/rGO, seiring bertambahnya komposisi rGO. Hasil FT-IR mengkonfirmasi adanya gugus fungsi oksigen yang telah tereduksi dan gugus fungsi Fe–O pada Fe3O4/rGO, serta terjadinya pergeseran vibrasi ikatan Fe–O. Hasil SEM-EDX mengkonfirmasi bahwa Fe3O4/rGO telah berhasil dikompositkan yang ditandai dengan adanya unsur Fe, O, dan C. Hasil VSM mengkonfirmasi bahwa Fe3O4 dan komposit Fe3O4/rGO memiliki sifat soft magnetic yang ideal untuk aplikasi RAM. Setelah dikompositkan dengan rGO, nilai magnetisasi saturasi dan magnetisasi remanen menurun, namun medan koersivitas meningkat. Hasil VNA menunjukkan pada rentang frekuensi C-band dan X-band, material Fe3O4 berpotensi untuk diaplikasikan pada RAM dikarenakan rendahnya nilai RL, serta persentase penyerapan gelombang mikro yang sangat tinggi. | ||||||||||||
| Uncontrolled Keywords: | stealth technology, radar absorbing material (RAM), coconut shells, Fe3O4/rGO stealth technology, radar absorbing material (RAM), coconut shells, Fe3O4/rGO | ||||||||||||
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
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| Divisions: | 02-Fakultas Keguruan dan Ilmu Pendidikan 02-Fakultas Keguruan dan Ilmu Pendidikan > 84203-Jurusan Pendidikan Fisika |
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| Depositing User: | NUR SHABRINA FITRIANI | ||||||||||||
| Date Deposited: | 21 Mar 2025 03:14 | ||||||||||||
| Last Modified: | 21 Mar 2025 03:14 | ||||||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/47835 |
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