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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia JFA (Jurnal Fisika dan Aplikasinya) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Science and Technology Indonesia International Journal of Science and Applied Science: Conference Series Indonesian Journal of Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Kreativitas PKM JIEMS (Journal of Industrial Engineering and Management Systems) Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teori dan Aplikasi Fisika JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Jurnal Fisika Indonesia Jurnal Pengabdian Masyarakat Khatulistiwa Journal of Energy, Material, and Instrumentation Technology NEAR: Jurnal Pengabdian kepada Masyarakat Jurnal Kemitraan Masyarakat

Posman Manurung

Departement Of Physics, Faculty Of Mathematic And Natural Science, University Of Lampung

Author-ID : 314687

Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Pengaruh Suhu Tinggi terhadap Karakteristik Keramik Cordierite Berbasis Silika Sekam Padi Sembiring, Simon; Manurung, Posman; Karo-Karo, Pulung
Jurnal Fisika dan Aplikasinya Vol 5, No 1 (2009)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

This study was carried out to investigate the effect of high temperature on the functional groups, microstructure and physical characteristics of cordierite ceramics obtained from an aqueous solution of magnesium nitrate hydrate ((Mg(NO3)2.6.12H2O)), aluminium nitrate hydrate (Al(NO3)2.9.15H2O) and silica sols extracted from rice husk. The samples were sintered at temperature of 1000â—¦C, 1200â—¦C and 1400â—¦C. Functional groups and microstructural characteristics of cordierite ceramics were examined by FTIR and SEM, respectivelly. FTIR study shows that the absence of the vibration bands of Na-OH, Si-OH, C-O, Si-O-Si on the samples. However, the formation of cordierite structure was dominated on this high temperature. Microstructure results confirmed the presence of irregular morphology of the solid and compact phases. In addition, the densities, shrinkage andhardness of cordierite increase significantly with increasing temperature, but porosity decreases with increasingtemperature.

MODELING INFILTRATION KINETICS OF LIQUIDS INTO POROUS ALUMINA PREFORMS Posman Manurung; It Meng Low; Craig Buckley
Jurnal Sains Materi Indonesia Vol 7, No 2: FEBRUARI 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

MODELING INFILTRATION KINETICS OF LIQUIDS INTO POROUS ALUMINA PREFORMS. Alpha-alumina preform was infiltrated with different infiltrant and pressure for studying the infiltration kinetic. Effects of pre-sintering temperature, type of infiltrant, pressure and multiple infiltrations on the rate of infiltration into porous alumina preforms were described. The pore radius of alumina preform is calculated based on the preform water system by using Washburn model. The pore radius from this model, r of 0.0147 μm is good agreement to the average pore radius found by using mercury porosity measurement, r of 0.0170 μm. The pore radius of 0.0147 μm is used to calculate the rate of infiltration, k. The k factors are 64.83 x 10-5 ms½ and 27.11 x 10-5 ms½ for water and TiCl3 respectively without involving pressure in the calculation. On the other hand, by using pressure, the k factors are 75.14 x 10-5 ms½ and 31.40 x 10-5 ms½ for water and TiCl3 respectively. Other formulas were also included as comparisons. The kinetic of water and titanium trichloride alumina preform system is parabolic in time or linier in square root of time.

Synthesis and characterization of TiO2 from Lampung’s Iron Sand using Leaching Method with Temperature Variation Iqbal Firdaus; Anggi Stevani; Yudhistira Novita Handayani; Nadia Febriyanti; Roniyus Marjunus; Posman Manurung
Jurnal Fisika dan Aplikasinya Vol 17, No 2 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.7921

Ilmenite is a natural material in the form of sand which contains heavy metal minerals that are very abundant in Lampung province. This research aims to determine the content of TiO2 from Lampungs iron sand by leaching method with temperature variation. The iron sand are mixed with sodium hydrogen carbonate (NaHCO3), then heated at 700◦C for an hour. This research uses 5 samples with leaching temperature variation of 70, 80, 90, 100, and 110◦C for 2 hours. The acid leaching process uses HCl 12 M with a ratio of iron sand and HCl of 1:4, while the water leaching process uses 50 ml of distilled water. Furthermore, the samples are characterized using XRD and XRF to determine TiO2 content in the iron sand. The result shows that the highest amount of TiO2 is obtained in the sample with the leaching temperature of 110◦C for 2 hours, which is approximately 61%.

X-Ray Diffraction and Microstructure of Tin Dioxide with Addition of Fe Posman Manurung
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1455.828 KB)

Preparation and characterization of tin dioxide, SnO2, had been carried out by precipitation process of SnCl2.2H2O in ammonia and aqua solutions with comparison of 1 : 7. FeCl3 was added to solution with variation of 0, 0,1, 0.2, 0.5 and 1.0 gram respectively and then sintered at 900°C. The X-ray diffraction (XRD) analysis shows that the intensity of diffraction increases with the addition of Fe. The addition of Fe does not cause the new phase. Generally, the Bragg angle is relative same for all samples that means Fe does not change significantly the cell parameters. Scanning electron microscopy (SEM) image shows the microstructure changed with the addition of Fe. On the small addition, the microstructure tends to oval and on the larger addition to plateau.

Pengaruh Variasi Polivinilpirolidon (PVP) Terhadap Pembentukan Serat Nano TiO2 Menggunakan Metode Electrospinning Vega Rahmawati Ar; Posman Manurung; Junaidi Junaidi; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 1 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Research on the formation of TiO2 nanofiber has been carried out with PVP variations of 1.1; 1,2; 1.3; 1.4 and 1.5 grams using electrospinning. This study aims to determine the effect of PVP variation on the viscosity and morphology of TiO2 nanofibers and to determine the crystal structure of the fibers. Synthesis of TiO2 was carried out using the sol-gel method. TTIP is used as a precursor, ethanol as a solvent, acetic acid as a catalyst and PVP as a fiber-forming polymer. The results of the viscosity measurement show that the amount of PVP used in the sample is directly proportional to the level of solution viscosity. Based on the results of SEM characterization, it showed relatively uniform nanofiber morphology with fiber diameter ranging from 94 nm - 735 µm. The results of TEM characterization showed that the size of TiO2 nanofiber particles ranged from 7-15 nm. The results of XRD analysis showed that the crystal structures formed at a calcination temperature of 450 oC were the anatase and rutile phases.

Perhitungan Burn Up Model Assembly Heksagonal pada Reaktor SCWR Menggunakan Bahan Bakarr Thorium Mey Puji Astuti; Yanti Yulianti; Posman Manurung; Simon Sembiring
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 1 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i1.85

The research about the calculation of burn-up model of the hexagonal assembly in SCWR reactor using thorium as fuel materials has been done. This research uses thorium-232 and uranium-233 as fuel materials. Calculations were performed using the ASMBURN code in the SRAC program, by determining fuel enrichment, cell radius, analyzing atomic density after burn up, increasing burn up level, and change of linear heat. The calculation results obtained show the value of efficient fuel enrichment at 4% enrichment, with 0.3902 cm of fuel cell radius, 0.4508 cm of cladding, and 0.5586 cm of moderator. The atomic density of Th232 decreased for each burn-up period meanwhile, the atomic density of U233, U235, and Pu239 increased. The keff value will decrease along with the addition of burn-up and greater change of linear heat.

Pengaruh Laju Penambahan Doping Fosfor terhadap Aktivitas Fotokatalis Nanotitania Menggunakan Metode Sol Gel Yunita Yunita; Posman Manurung; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 2 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

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Pengaruh Waktu Penambahan Doping Sulfur terhadap Luas Permukaan dan Struktur Kristal Nanotitania Menggunakan Metode Sol Gel Anggi Puspita Dewi; Posman Manurung; Syafriadi Syafriadi
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 2 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

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Sintesis titania doping sulfur (S-TiO2) dilakukan melalui metode sol-gel. Titanium isopropoksida (TTIP), tween-80, isopropanol dan asam sulfat (H2SO4) sebagai sumber doping sulfur digunakan sebagai bahan utama. Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu penambahan doping sulfur selama 0, 30, 60, 90 dan 120 menit menggunakan pompa injeksi terhadap pembentukan struktur kristal dan luas permukaan. Serbuk titania dikalsinasi pada suhu 450 oC selama 5 jam. S-doping TiO2 dikarakterisasi menggunakan x-ray diffraction (XRD) dan surface area analyzer (SAA). Hasil pengujian XRD menunjukkan bahwa fasa yang diperoleh yaitu fasa anatase untuk semua sampel sedangkan hasil dari SAA menunjukkan bahwa pada sampel S-02 memperoleh nilai luas permukaan 95, 310 m2/g dan hasil perhitungan ukuran partikel sampel S-02 memperoleh nilai sebesar 10,17 nm hal ini sesuai dengan teori dimana, semakin kecil ukuran partikel yang diperoleh maka luas permukaanya akan semakin besar.

Pengaruh Laju Penambahan Doping Fosfor terhadap Struktur Kristal dan Luas Permukaan Spesifik Nanotitania dengan Metode Sol Gel Vidi Nurhidayah; Posman Manurung; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 2 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

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Research on the effect of the addition phosphorus doping using a syringe pump with the sol-gel method. The purpose of this study was to determine the effect of the addition rate of phosphorus doping to the crystal structure and specific surface area of TiO2. Doping increment rate used are 0,4; 0,2; 0,13 and 0,1 ml/hours of TiO2 samples were calcined at 450ºC for 5 hours. The powder was characterized by x-ray diffraction (XRD) and surface area analyzer (SAA) by the BET method. XRD diffractogram generally shows that the nanotitania crystal structure phase is anatase which is the result of TTIP synthesis as the main source of TiO2. Particle size analysis using XRD data on TiO2 with different rates in a row that is 10.13; 9.98; 9.25 and 10.33 nm. BET test results for each sample were 86.954; 87,367; 99,694; 96,295 and 96,187 m2/g. The results of XRD characterization can affect the surface area, getting smaller the particle size, the greater surface area will be obtained.

Characteristics of Nanosize Spinel NixFe3-xO4 Prepared by Sol-Gel Method Using Egg White as Emulsifying Agent Rudy Situmeang; Sukma Wibowo; Wasinton Simanjuntak; R. Supryanto; Rizki Amalia; Mitra Septanto; Posman Manurung; Simon Sembiring
Indonesian Journal of Chemistry Vol 15, No 2 (2015)
Publisher : Universitas Gadjah Mada

In this study, sol-gel method using egg white as emulsifying agent was applied to prepare nano size spinel NixFe3-xO4 (with x = 0.2–1). Sample preparation was carried out by mixing the solution of Fe(NO3)3.9 H2O and Ni(NO3)3.6 H2O with egg white, and then the sample was stirred thoroughly using magnetic stirrer. After freeze–drying process, the sample was subjected to calcination treatment and subsequently characterized. The phase composition was evaluated using the X-ray diffraction (XRD) technique, followed by quantitative analysis using Rietveld and Debye-Scherrer Methods. The functionality of the sample was identified using Fourier Transform Infrared (FTIR) spectroscopy, and surface morphology and elemental composition were analyzed using scanning electron microscopycoupled with electron dispersive spectroscopy (SEM/EDS). The results of XRD characterization indicated that materials consist of various crystalline phases, with NiFe2O4 as a major phase. FTIR Analysis revealed the existence of both Lewis and Brønsted–Lowry acid sites, with Lewis acid as the prominent site. The sample was found to display relatively homogeneous surface morphology, having the crystallite size in the range of 33 to 61 nm according to the Debye-Scherrer equation. The EDS data indicated that the ratio of Fe/Ni is in agreement with the composition of the raw materials used.

Co-Authors Abdurrahman, Ahmad Faruq Adeliya Ayu Anggraini Agus Riyanto Agus Riyanto Agus Riyanto Agus Riyanto Agus Suyatna Ahmad Faruq Abdurrahman Ahmad Rosadi Alfin Edo Kaisar Lubis Amir Supriyanto Anggi Puspita Dewi Anggi Stevani Anggraini, Adeliya Ayu Anggraini, Anisyah Arya R. Syah Ayu Aprilia Ayu Aprilia Benyamin, Chairunissa A Chandra Ertikanto Craig Buckley Delfi Oktavia Amrani Della M. Andini Dita Rahmayanti Donna Agnesia Dwi Asmi Edi Suharyadi Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Suka Erika Sempana Erika Sempana Ginting Fajar Nurjaman Faradilla Syani Fatia Ulfah Fegi Liani Firdaus, Iqbal Flora Rosdiana Lumbansiantar Futichah Futichah Futichah Futichah Gregorius N. Susanto Gultom, Rysa Sonya Reni Paulin Gurum Ahmad Pauzi Hasni Handayani Hesti Wahyu Handani Imaniar Romaeni Indra Pardede Iqbal Firdaus Irma Yulianti It Meng Low Jayanti Pusvitasari Johar Sitohang Junaidi Junaidi - Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Juniati Br Simbolon Karo Karo, Pulung Karo, Pulung Karo Ketut Putra Wijaya Lady Permatasari Lusi Vusfita Sari Maharani Maharani Maharani, Renita Marjunus, Ronius Marjunus, Roniyus Mega Pertiwi, Mega Mey Puji Astuti Miranti Syafitri Mitra Septanto Nabilah Rafidiyah Nadia Febriyanti Nita Susanti Nola Fricilia Nurcahayaniati, Hikmah Nurqori Setiawati Nurul Oktavia Prastica, Lusia Puji Lestari Pulung Karo-Karo Pulung Karo-karo Pulung Karo-Karo Putri, Faradilla Nabila R. Supryanto Rahayu, Sri Rahma Fauza Rahmayanti, Dita Renita Maharani Fauzi Rika Rahayu Riska Trisna Nuraini Riyanto, Agus Rizki Amalia Rudy Situmeang Rudy Situmeang Rudy T M Situmeang S Suprihatin Sahtoni Sahtoni, Sahtoni Salwa Dian Pertiwi Sari, Tria Permata Sembiring, Simon Sempana, Erika Shabrina, Shabrina Yakosati Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Siti Fadilah Sitohang, Rosanti Sri Rahayu Sri Ratna Sulistiyanti sri wahyu suciayti Sri Wahyu Suciyati Sri Wahyu Suciyati Suharyadi, Edy Sukma Wibowo Sumardi . Sumardi, Sumardi Sumiyati Sumiyati Supardi Supardi Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Surya Prihanto Syafriadi Syafriadi Syafriadi Syafriadi Syafriadi Tria Permata Sari Trianasari Trianasari Trianasari, Trianasari Vega Rahmawati Ar Vidi Nurhidayah Wasinton Simanjuntak Windhini Anggraeni Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yuant Tiandho Yudhistira Novita Handayani Yunita Yunita Yusril Al Fath Zaharani, Rethanita Zahra Maria Ulfa

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