Sasria, Nia (2016) Pengaruh Metode Pelapisan dan Ketebalan Lapisan Terhadap Rugi Refleksi Pada Barium MHeksaferrit/ Poly(aniline,pyrrole,ethylene terephthalate) Sebagai Material Penyerap Radar. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Material penyerap radar atau Radar Absorbing Material (RAM) terbuat
dari dua bahan utama yaitu material dielektrik dan material magnetik. Bahan
magnetik yang banyak digunakan yaitu Barium M-heksaferrit (BaM). BaM
digunakan karena dapat menyerap gelombang radar, biayanya rendah, suhu curie
tinggi dan magnetisasi yang relatif besar. Bahan dielektrik yang banyak digunakan
yaitu polimer yang dikonduktifkan. Polimer konduktif digunakan karena memiliki
sifat stabilitas termal yang baik dan konduktivitas yang tinggi. Sifat-sifat ini
sangat dibutuhkan untuk efektivitas RAM. Salah satu variabel penting dalam
pembuatan RAM adalah ketebalan lapisan, dimana semakin tebal lapisan RAM
maka semakin besar penyerapannya. Pada penelitian kali ini dilakukan sintesis
BaM menggunakan metode sol gel dengan doping Ni-Zn. BaM ditambahkan pada
tiga jenis polimer konduktif yakni Polianilin (PAni), Poly(ethylene terephthalate)
(PET) dan Polipirol (PPy) untuk membentuk komposit RAM. Komposit
BaM/(PAni,PPy) disintesis dengan metode polimerisasi oksidasi kimia. Komposit
BaM/PET disintesis dengan metode pencampuran lelehan. Komposit
BaM/(PAni,PET,PPy) tersebut dilapiskan pada baja kapal grade A tipe AH36
dengan metode Dallenbach, Salisbury dan Jaumann layers dengan variasi
ketebalan 2, 4, dan 6 mm. Analisis terhadap sifat magnetik BaM dan rugi refleksi
(RL) dari komposit BaM/(PAni,PET,PPy) dilakukan dengan pengujian VSM dan
VNA. Sebagai hasilnya, BaM (BaNixZnxFe12-2xO19) memiliki nilai Ms dan Hc
maksimum yaitu 56,6 emu/g dan 60 Oe. Nilai RL maksimum dicapai oleh
BaM/PAni ketebalan 6 mm pada lapisan Jaumann yaitu -48,720 dB 8,1 GHz.
Hasil ini menunjukkan bahwa komposit BaM/PAni merupakan material soft
magnetik dengan nilai RL tinggi yang sesuai untuk aplikasi RAM. ========== Radar Absorbing Material (RAM) is made of two main ingredients of a
dielectric material and a magnetic material. Magnetic materials are widely used is
Barium M-hexaferrite (BAM). BAM is used because it can absorb radar waves,
low cost, high curie temperature and magnetization relatively large. Dielectric
materials are widely used is conductive polymer. Conductive polymer is used
because it possesses good thermal stability and high conductivity. These
properties are needed for the effectiveness of RAM. One important variable in the
manufacture of RAM is the thickness of the layers, that the thicker the layer of
RAM will increase the absorption. In this research, BaM was prepared by sol gel
method with Ni-Zn doping. BaM was added on three types of conductive
polymers that Polyaniline (PAni), Poly(ethylene terephthalate) (PET) and
Polypyrrole (PPy) to form a RAM composite. BaM/(PAni,PPy) composites were
synthesized by chemical oxidation polymerization method. BaM/PET composite
was produced by melt compounding. The composites were coated on A-grade
AH36 steel vessel using Dallenbach, Salisbury and Jaumann Layers methods with
thickness of 2, 4, and 6 mm. Analysis of the magnetic and reflection loss (RL)
properties of the BaM and BaM/(PAni,PET,PPy) composites were done by VSM
and VNA. As the results, BaM (BaNixZnxFe12-2xO19) exhibited the highest value
of Ms and Hc, 56,6 emu/g and 60 Oe respectively. The maximum RL reached to -
48.720 dB at 8,1 GHz of BaM/PAni coating with 6 mm thickness at Jaumann
Layer. These results indicated that BaM/PAni composite was a soft magnetic
material with high RL value that was suitable for RAM.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RTMt 669.967 25 Sas p 3100016068337 |
| Uncontrolled Keywords: | Barium M-heksaferrit, Polianilin, Ketebalan, Jaumann layer, RAM, Barium M-hexaferrite, Polyaniline, Thickness, Jaumann layer |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN689+ Physical metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 07 Nov 2019 08:08 |
| Last Modified: | 07 Nov 2019 08:08 |
| URI: | http://repository.its.ac.id/id/eprint/71461 |
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