Sintesis Material Komposit BaFe12O19/C dan Fe3O4/C untuk Aplikasi Penyerap Gelombang Mikro (7-13 GHz)

Lily Amanda Tarihoran, . (2024) Sintesis Material Komposit BaFe12O19/C dan Fe3O4/C untuk Aplikasi Penyerap Gelombang Mikro (7-13 GHz). Sarjana thesis, Universitas Negeri Jakarta.

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Abstract

Barium heksaferit dan pasir besimerupakan bahan magnetik yang telah umum digunakan sebagai material penyerap gelombang mikro. Pembuatan komposit bahan magnetik dengan karbon telah banyak dilakukan untuk mencari bahan karbon dengan kemampuan absorpsi paling efektif.Penelitian ini bertujuan untuk menghasilkan material komposit bahan magnetik dengan karbon aktif dan meneliti komposisi karbon paling efektif untuk menyerap gelombang mikro. Pada penelitian ini, BaFe12O19/C dan Fe3O4/C disintesis dengan metodemechanical milling menggunakanplanetary ball milldan dilakukan karakterisasi dengan menggunakan mikroskop digital,permagraph, danvector network analyzer. Morfologi permukaan material komposit BaFe12O19/C dan Fe3O4/C menunjukan tekstur kasar dengan adanya aglomerasi karena interasi magnetik. Sifat kemagnetan material komposit BaFe12O19/C dan Fe3O4/C menunjukan penurunan nilai remanensi (Ms),magnetisasi saturasi (Ms), dan koersivitas (Hc) seiring dengan bertambahnya komposisi karbon aktif. Nilai Hc yang tinggi pada BaFe12O19/C menunjukan material merupakan jenishard magnetic,dan nilai Hc yang rendah pada Fe3O4/C menunjukan material merupakan jenissoft magnetic. Kemampuan absorpsi gelombang mikro yang optimal adalah pada material BaFe12O19/C 0% dan Fe3O4/C 0% denganreflection lossminimum sebesar-8,112 dan-8,309 dB dan persentase absorpsi material sebesar84,553% dan85,241%. Penambahan karbon aktif mengurangi kemampuan penyerapan gelombang mikro. Barium hexaferrite and iron sand are magnetic materials commonly used as microwave absorbing materials. The creation of magnetic material composites with carbon has been widely conducted to find the most effective carbon material for absorption. This research aims to produce magnetic material composites with activated carbon and to investigate the most effective carbon composition for microwave absorption. In this study, BaFe12O19/C and Fe3O4/C were synthesized using the mechanical milling method with a planetary ball mill and characterized using a digital microscope, permagraph, and vector network analyzer. The surface morphology of the BaFe12O19/C and Fe3O4/C composites showed a rough texture with agglomeration due to magnetic interaction. The magnetic properties of BaFe12O19/C and Fe3O4/C composites showed a decrease in remanence (Mr), saturation magnetization (Ms), and coercivity (Hc) with increasing activated carbon composition. The high Hc value in BaFe12O19/C indicates that the material is a hard magnetic, while the low Hc value in Fe3O4/C indicates that the material is a soft magnetic. The optimal microwave absorption performance was in BaFe12O19/C 0% and Fe3O4/C 0% materials with a minimum reflection loss of -8.112 dB and -8.309 dB and an absorption percentage of 84.553% and 85.241%. The addition of activated carbon reduces the microwave absorption performance.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Prof. Dr. Erfan Handoko, M.Si 2). Prof. Dr. Mangasi A Marpaung, M.Si
Subjects:	Sains > Fisika
Divisions:	FMIPA > S1 Fisika
Depositing User:	Users 25504 not found.
Date Deposited:	20 Aug 2024 03:43
Last Modified:	20 Aug 2024 03:43
URI:	http://repository.unj.ac.id/id/eprint/50340

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