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Jurnal Sains Materi Indonesia

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Published by Badan Tenaga Nuklir Nasional

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Core Subject : Science,

Materials Science & Nanotechnology

Jurnal Sains Materi Indonesia (Indonesian Journal of Materials Science), diterbitkan oleh Pusat Teknologi Bahan Industri Nuklir - BATAN. Terbit pertama kali: Oktober 1999, frekuensi terbit: empat bulanan.

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Articles 865 Documents

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DEVELOPMENT OF MATERIALS PROCESSING USING MAGNETIC FIELD Hideyuki Yasuda
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

DEVELOPMENT OF MATERIALS PROCESSING USING MAGNETIC FIELD. The magnetism, the well-known physical phenomena, has been applied for developing the magnetic materials and devices. To improve the performance of the magnetic materials is obviously important issue in engineering until now. Since the cryogen-free superconducting magnets enable us to impose the relatively high magnetic field such as 10T in the room temperature bore with diameter from 50 mm to 300 mm for weeks, different attempts using the magnetism have been proposed for developing materials processing. The responses of the paramagnetic and the diamagnetic materials to the high magnetic field are often detectable. The high magnetic field has potential to control the micro structure of the ferromagnetic, the paramagnetic and the diamagnetic materials. Therefore, electromagnetic processing of materials (EPM) using the high magnetic field has been realized as a unique technique for controlling the microstructure. The high magnetic field was used to achieve the crystallographically aligned structure, to produce the regular structure in which one phase is regularly aligned in the matrix, to develop the containerless processes by the magnetic levitation and so on. In this paper, the principle of EPM is briefly explained. Then, some applications of the high magnetic field to the materials processing are presented; (1) the crystallographically aligned structure of the Bi-Mn system and (2) the regular structure formation in the Al-In monotectic alloys.

PREPARATION OF ELECTROCHEMICALLY IMMOBILIZED IRON ON THIN FILM FAUJASITE-NANOZEOLITE MODIFIED GLASSY CARBON Yuni K. Krisnandi; Ivandini T. Anggraningrum; Hanny Tovina; Aminah Aminah
Jurnal Sains Materi Indonesia Vol 12, No 2: FEBRUARI 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

PREPARATION OF ELECTROCHEMICALLY IMMOBILIZED IRON ON THIN FILM FAUJASITE-NANOZEOLITE MODIFIED GLASSY CARBON. Metal iron that electrochemically immobilized on thin film faujasite type of nanozeolite (FAU-nanozeolite) grown on polyelectrolyte (PDDA, PSS, PDDA layers) modified glassy carbon has been prepared. Thin film of FAU-type nanozeolite was synthesized using seeding method. The seeded modified-glassy carbon then was immersed in FAU colloidal suspension at 100 oC for certain period. XRD patterns of the seed and as-synthesized zeolite powder have similarity with the patterns from standard NaY zeolite. SEM images of thin film nanozeolite also show the appearance of crystals with homogeneous size of about < 1 μm. The best spread thin film was obtained when using 3 ml seed and immersion in colloidal FAU solution for 20 hours. The thin film then was utilized for metal iron synthesis, in which Fe(III) from FeNO3 solution containing Na-citrate of that adsorbed on the surface of thin film was electrochemically reduced to (Fe0). SEM image shows some aggregates (size > 100 nm) of the nanozeolite thin film. However, it can also be seen that the crystals actually consist of smaller particles with size < 100 nm. The EDS mapping of the surface indicates that after electrochemical treatment, the surface of thin film consists of about 0.30% (w/w) iron that spread evently both on the surface covered by nanozeolite thin film and that from modified glassy carbon.

ENHANCEMENT OF GIANT MAGNETORESISTANCE IN Fe2O3-MWCNT/PVA NANoCOMPOSITE FILM S. Purwanto; Wisnu Ari Adi; Salim Mustofa
Jurnal Sains Materi Indonesia Vol 16, No 3: APRIL 2015
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

ENHANCEMENT OF GIANT MAGNETORESISTANCE IN Fe2O3-MWCNT/PVA NANoCOMPOSITE FILM. Synthesis and magnetic properties characterization of Fe2O3-MWCNT/PVA nano Composite film were carried out. Fe2O3-MWCNT as a filler of nano Composite thin film were synthesized using simple mixing methods froma solution containing FeCl3, and Multi-Walled Carbon Nanotube (MWNT). The solution was sonicated for almost 20 minutes then dried at 450 oC for one hour. The mixture of the two composition was dispersed with Sodium Dodecyl Sulfate (SDS) in 20 mL aquabidest and homogenized by ultrasonicator for 15 minutes at 40 oC. Then filler was then mixed with Polyvinyl Alcohol (PVA) with some various concentration and dried overnight at room temperature. X-Ray Diffraction (XRD) analysis and Raman Spectroscopy were used to find out the presence of Fe2O3 phase in as prepared sample. Iron oxide phase partially filled in the wall of MWCNT observed by Transmission Electron Microscope (TEM). The Giant Magnetoresistance (GMR) properties were investigated. The maximum GMR value was negative 80% of the composition 1:9 filler/matrix volume ratio. The linear negative of the magnetoresistance (MR) ratio is coincident with a model as proposed by Nguyen, Spivak and Shklovskii (NSS) and related to the effect of quantum interference between Fe2O3-MWCNT in PVA matrix.

KEBIJAKAN PENGEMBANGAN RISET ILMU PENGETAHUAN DAN TEKNOLOGI NANO Anny Sulaswatty
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

DEPOSISI Al DAN NITRIDASI BAHAN COR-TEN UNTUK MENINGKATKAN KEKERASAN DAN KETAHANAN KOROSI PADA SUHU TINGGI Wagiyo Honggowiranto; Ari H.; Syahril Syahril
Jurnal Sains Materi Indonesia Vol 9, No 1: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

DEPOSISI Al DAN NITRIDASI BAHAN COR-TEN UNTUK MENINGKATKAN KEKERASAN DAN KETAHANAN KOROSI PADA SUHU TINGGI. Telah dilakukan deposisi lapisan tipis aluminium dan nitridasi terhadap bahan Cor-Ten Steel yang dilanjutkan dengan uji korosi suhu tinggi (oksidasi). Nitridasi dilakukan dengan menggunakan tungku yang dialiri gas N2 dan NH3 cair pada suhu 550 °C, selama 3 jam, 5 jam, 7 jam dan 20 jam, kemudian uji korosi dengan menggunakan alat Thermal Gravimetry Analysis/Magnetic Suspension Balance (TGA/MSB) selama 50 jam pada suhu 650 °C. Setelah dioksidasi sampel dikarakterisasi struktur kristalnya menggunakan alat X-Ray Diffractometer (XRD), strukturmikro menggunakan alat Scanning Electron Microscope (SEM) dan kekerasannya menggunakan alat Micro Hardness Tester. Hasil uji korosi suhu tinggi menunjukkan bahwa, sampel yang laju oksidasinya paling kecil atau ketahanan korosinya tinggi adalah yang dinitridasi selama 5 jam, dengan lapisan tipis aluminium menunjukkan lapisan pelindung berupa Al2O3. Sedang hasil uji kekerasan bahan Cor-Ten menunjukkan peningkatan, kekerasan sesudah dinitridasi menjadi dua kali lipat yaitu dari 137 VHN menjadi 340 VHN. Kekerasan setelah dideposisi Al dan nitridasi selama 5 jam meningkat tajam lebih dari empat kali lipat yaitu sebesar 744 VHN, hal ini disebabkan karena terbentuknya aluminium nitrida (AlN) yang keras.

PREPARATION OFPOLYURETHANE MICROCAPSULE USING 1,3 PROPANEDIOLAS THE POLYOL COMPONENT. Ahmad Randy; Dewi Sondari; Evi Triwulandari; Murni Handayani
Jurnal Sains Materi Indonesia Vol 12, No 1: OKTOBER 2010
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

PREPARATION OFPOLYURETHANE MICROCAPSULE USING 1,3 PROPANEDIOLAS THE POLYOL COMPONENT. Self-healing property is the ability of a material to heal damages automatically and autonomously. Its application would be ranged from paint coating, anti corrosion coating, space-shuttle material, construction (concrete) and automotive. Extrinsic self healing requires self healing agent preembedded or incorporated into polymer matrix that would be released and close the damage in the polymer system, where the polymer itself is not healable. Healing agents are encapsulated or embedded into the material prior application. Example of monomer encapsulated to give self healing property is isophorone diisocyanate (IPDI) encapsulated in polyurethane shell. In this study, we studied the possibility of 1,3 propanediol, that can be derived from palm oil as polyol monomer for polyurethane microcapsule shell containing IPDI or stannous octoate as a self healing agent. Microcapsule in this study was prepared by interfacial polymerization technique to form IPDI monomer in polyurethane shell. FT-IR analysis show that polyurethane prepolymer produced still have unreacted isocyanate group necessary for interfacial polymerization of polyurethane. Morphological analyses of the microcapsule products show that the products have spherical shapes with smooth surface and some with wrinkled surface. The particle sizes were ranged from 40.29 to 526.80 μm.

UNIQUE CONFORMATION OF RH(I) PILLAR COMPLEXES IMMOBILIZED ON TAENIOLITE Kiky C. Sembiring; Shogo Shimazu
Jurnal Sains Materi Indonesia VOL 13, NO 1: OKTOBER 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

UNIQUE CONFORMATION OF RH(I) PILLAR COMPLEXES IMMOBILIZED ON TAENIOLITE. Rhodiumpillar complex with chiral diamine ligands, Rh-Cn-(-)-CHDA, were synthesized and intercalated with various loading amounts in the range of 19 - 26%CEC, Cation Exchange Capacity (CEC) into Lithium Taeniolite (LiTN) These pillared catalysts (Rh-Cn-(-)-CHDA/TN) were characterized by XRD, elementary analysis, and FT-IR. Results of XRD analysis showed that the clearance space of the catalyst interlayer increased proportionally with the alkyl chain length of the ligandwith the slopeof 0.14 nm/CH2.

PENGARUH PENAMBAHAN COUPLING AGENT 3-AMINO PROPYLTRIETHOXYSILANE TERHADAP SIFAT MEKANIK MAGNET KOMPOSIT HEKSAFERIT BERBASIS POLIESTER Sugik S.; Sudirman Sudirman; Aloma Karo Karo; Indra Gunawan; Ari Handayani; Anik S.
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

PENGARUH PENAMBAHAN COUPLING AGENT 3-AMINO PROPYLTRIETHOXYSILANE TERHADAP SIFAT MEKANIK MAGNET KOMPOSIT HEKSAFERIT BERBASIS POLIESTER. Telah dipelajari pengaruh penambahan coupling agent terhadap sifat mekanik magnet komposit heksaferit berbasis poliester. Pada serbuk bahan magnet heksaferit dari jenis Sr dan Ba dalam jumlah tertentu ditambahkan 5 mL dan 10 mL bahan coupling agent jenis 3-APE (3-Aminopropyltriethoxysilane) dan dilakukan pengadukan. Kemudian ditambahkan pula poliester dengan perbandingan volumtertentu yaitu 40%, 50%, dan 60 %. Bahan campuran tersebut diaduk sampai merata kemudian dilakukan hot press dan cold press. Hasil magnet komposit tersebut dilakukan karakterisasi berupa pengujian kekerasan, tensile strength dan strukturmikro pada permukaan bahan magnet komposit. Distribusi partikel dan kompatibilitas bahan magnet ke dalam poliester dipengaruhi oleh jumlah penambahan coupling agent pada bahan magnetnya. Sifat mekanik dari pengaruh penambahan coupling agent sampai dengan jumlah 10mL dapat meningkatkan sifat mekanik rata-rata yaitu tensile strength dan kekerasan dari bahan magnet komposit tersebut.

STRUKTUR DAN SIFAT MAGNETIK NANO PARTIKEL MAGNETIK (Fe-R) (R = Fe, Tb, Dy, Co) DARI HASIL PROSES MILLING ENERGI TINGGI Mujamilah Mujamilah; Grace Tj. Sulungbudi; Engkir Sukirman; Yosef Sarwanto; Eko Yudho P
Jurnal Sains Materi Indonesia Vol 13, No 3: JUNI 2012
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

STRUKTUR DAN SIFAT MAGNETIK NANO PARTIKEL MAGNETIK (Fe-R) (R = Fe, Tb, Dy, Co) DARI HASIL PROSES MILLING ENERGI TINGGI. Salah satu proses pembentukan bahan dalam ukuran nano yangmudah dan efektif adalah dengan proses milling energi tinggi (High EnergyMilling). Dalam metode ini sifat akhir partikel yang diperoleh dapat dikendalikan dengan memvariasikan komposisi, waktu dan kondisi proses. Makalah ini menyampaikan hasil proses milling pada serbuk dengan komposisi utama Fe dengan fraksi minimal 95% w/w dan tambahan serbuk Co, Tb4O7 dan Dy2O3. Proses milling dilakukan dalam media campuran etanol/air selama 40 jam. Hasil analisis fasa pada pola difraksi sinar-X dengan metode analisis Rietveld menunjukkan terbentuknya fasa campuran Fe, Fe3O4/γFe2O3 dengan ukuran kristalin ~ 10 nm. Ukuran kristalin terkonfirmasi pada foto pengamatan dengan Transmission ElectronMicroscope (TEM) yangmemastikan terbentuknya partikel berdomain tunggal (single domain particle) sebagai hasil proses milling ini. Atom Co cenderungmenggantikan sebagain atomFe pada salah satu posisi dalam unit sel kristalnya, sedangkan atomTb dan Dy terinterstisi dan mendeformasi struktur oksida Fe. Kedua mekanisme ini terjadi secara homogen dalam cuplikan tanpa mengubah struktur awal fasa secara signifikan. Dua perubahan ini berimbas pada penurunan sifat magnetik nanopartikel dengan nilai magnetisasi terendah mencapai ~ 105 emu/gram pada penambahan Co.

SINTESIS NANOKATALIS TiO2 ANATASE DALAM LARUTAN ELEKTROLIT DENGAN METODA SOL GEL Siti Wardiyati; Adel Fisli; Saeful Yusuf
Jurnal Sains Materi Indonesia Vol 15, No 3: APRIL 2014
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

SINTESIS NANOKATALIS TiO2 ANATASE DALAM LARUTAN ELEKTROLIT DENGAN METODA SOL GEL. Telah dilakukan sintesis nanokatalis TiO2 anatase dengan metode sol gel. Sintesis TiO2 dilakukan dengan cara mereaksikan prekursor titanium klorida (TiCl4) dengan ammonium hidroksida (NH4OH) pada suhu 70 oC. Dalam upaya mempersingkat proses pembuatan nanopartikel TiO2 anatase maka pada penelitian ini ditambahkan larutan elektrolit (NH4)2SO4 yang berguna untuk meningkatkan proses adsorpsi dan desorpsi ion pada perubahan bentuk gel ke partikel. Analisis fasa dilakukan dengan menggunakan X-Ray Difractometer (XRD), penentuan ukuran partikel menggunakan Transmission Electron Microscope (TEM) dan Particle SizeAnalyzer (PSA). Nilai energy gap ditentukan dengan spektrofotometer UV-Visible Diffuse Reflectance Spectroscope (UV-Vis DRS). Hasil karakterisasi menunjukkan diperolehnya TiO2 kristalin dengan fasa anatase, ukuran partikel ±10 nm dan nilai energy gap 3,26 eV. Hasil uji degradasi pada methylene blue menunjukkan bahwa TiO2 hasil sintesis bersifat foto katalitik.

Page 12 of 87 | Total Record : 865

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