Efek Substitusi Al (Aluminium) dan Mn (Mangan) pada Material Magnetik Barium Heksaferit terhadap Kemampuan Serapan Gelombang Elektromagnetik

Juwanda Fernando, . (2024) Efek Substitusi Al (Aluminium) dan Mn (Mangan) pada Material Magnetik Barium Heksaferit terhadap Kemampuan Serapan Gelombang Elektromagnetik. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

ABSTRAK JUWANDA FERNANDO, 2024. Efek Substitusi Al (Aluminium) dan Mn (Mangan) pada Material Magnetik Barium Heksaferit terhadap Kemampuan Serapan Gelombang Elektromagnetik, Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. Juli 2024. Barium heksaferit merupakan suatu jenis ferit yang memiliki struktur kristal heksagonal. Penelitian tentang efek substitusi Al dan Mn pada material magnetik Barium Heksaferit terhadap kemampuan serapan gelombang elektromagnetik telah dilakukan. Berdasarkan sintesis material magnetik BaFe12-2xAlxMnxO19 yang dilakukan dengan menggunakan metode reaksi zat padat. Pada sintesis yang dilakukan diperoleh hasil yang akan dikarakterisasi berupa pellet hasil dari kompaksi . Hasil analisis optik pada sampel perbesaran 500 kali terlihat tercampur rata, perbesaran 1300 kali terlihat semakin tinggi nilai variasi penambahan Al dan Mn maka, pada sampel terlihat partikel yang bewarna putih yang semakin meningkat. Dikarenakan komposisi material Al2O3 yang berwarna putih meningkat. Sifat kemagnetan material magnetik BaFe12-2xAlxMnxO19 menunjukan penurunan magnetisasi remanensi (Mr) dan nilai medan koersivitas (Hc) serta peningkatan magnetisasi saturasi (Ms) seiring meningkatnya penambahan massa Al dan Mn.Berdasarkan nilai Hc yang diperoleh menunjukan material magnetik BaFe12-2xAlxMnxO19 merupakan hard magnetic. Sifat penyerapan gelombang mikro rentang milliwave dengan frekuensi 26.5 – 40 GHz pada material magnetik BaFe12- 2xAlxMnxO19 yang optimal ketika x = 0.75. Hal ini dikarenakan pada variasi x = 0.75 memiliki nilai Reflection Loss (RL) minimum sebesar -10.031 dB , dengan bandwith (< -5 dB) sebesar 11.722 GHz, bandwith ( < -10 dB) sebesar 9.624 GHz. Presentase absorption material + transmission maksimum (gelombang yang tidak dipantulkan kembali) sebesar 90.070 %. Kata Kunci : Barium heksaferit, substitusi, reaksi zat padat, BaFe12-2xAlxMnxO19 , gelombang mikro (milliwave). ***** ABSTRACT JUWANDA FERNANDO, 2024. Effects of Al (Aluminum) and Mn (Manganese) Substitution in Barium Hexaferite Magnetic Material on Electromagnetic Wave Absorption Ability, Physics Study Program, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta. July 2024. Barium hexaferite is a type of ferrite that has a hexagonal crystal structure. Research on the effect of Al and Mn substitution in Barium Hexaferite magnetic material on the ability of electromagnetic wave absorption has been conducted. Based on the synthesis of BaFe12-2xAlxMnxO19 magnetic material carried out using the solid state reaction method. In the synthesis carried out, the results obtained will be characterized in the form of pellets resulting from compaction. The results of optical analysis on the sample magnification of 500 times look evenly mixed, 1300 times magnification looks the higher the value of the variation of the addition of Al and Mn then, in the sample visible white particles that are increasing. Due to the composition of white Al2O3 material increases. Due to the composition of white Al2O3 material increases. The magnetic properties of BaFe12-2xAlxMnxO19 magnetic material show a decrease in remanence magnetization (Mr) and coercivity field value (Hc) and an increase in saturation magnetization (Ms) as the mass addition of Al and Mn increases. Based on the Hc value obtained, it shows that BaFe12-2xAlxMnxO19 magnetic material is hard magnetic. The microwave absorption properties of the milliwave range with a frequency of 26.5 - 40 GHz in the BaFe12-2xAlxMnxO19 magnetic material are optimal when x = 0.75. This is because the x = 0.75 variation has a minimum Reflection Loss (RL) value of -10.031 dB, with a bandwidth (< -5 dB) of 11.722 GHz, a bandwidth (< -10 dB) of 9.624 GHz. The percentage of material absorption + maximum transmission (non-reflected waves) is 90.070%. Keywords: Barium hexapherite, substitution, solid state reaction, BaFe12-2xAlxMnxO19, microwave (milliwave).

Item Type:	Thesis (Sarjana)
Additional Information:	1). Prof. Dr. Erfan Handoko, M.Si 2). Prof. Dr. Mangasi Alion Marpaung, M.Si
Subjects:	Sains > Sains, Ilmu Pengetahuan Alam Sains > Fisika
Divisions:	FMIPA > S1 Fisika
Depositing User:	Users 24791 not found.
Date Deposited:	13 Aug 2024 00:20
Last Modified:	13 Aug 2024 00:20
URI:	http://repository.unj.ac.id/id/eprint/49368

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