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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia JFA (Jurnal Fisika dan Aplikasinya) 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
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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Sifat Fisis Komposit Polietilen/Nanotitania Sebagai Fungsi Ketebalan Nola Fricilia; Posman Manurung; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol 7, No 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.1930

Abstract

Physical properties of polyethylene (PE)/nanotitania composite as a function of thickness have been studied. The material used is PE and nanotitania. The blending of PE with nanotitania was carried out by melting polyethylene at 95 °C for 5 minutes then added nanotitania 5 wt% and 10 wt% and heated at 124 ° C for 30 minutes. Then printed using barcoater with size 6, 12 and 25 µm with four repetitions. Variations were performed to determine the effect of composite thickness of polyethylene/nanotitania on electrical properties and functional groups. FTIR results show that as the thickness of the absorption sample increases, new functional groups appear, namely hydroxyl and carbonyl. The LCR results show the smallest conductivity value, sample 5 wt% PE / nanotitania with 6 µm size and the largest 10% PE/nanotitania sample with a size of 25 µm each at 2,302 x 10-5 S/m and 3,121 x 10-5 S/m at a frequency of 105 Hz. While the largest dielectric constant value is a sample of PE/nanotitania 5 wt% with a size of 6 µm and the smallest sample PE/nanotitania 10 wt% with a size of 6 µm at a frequency of 105 Hz. Based on these characteristics, the 5 wt% PE/nanotitania sample with a size of 6 µm is the material with the best dielectric properties so that the sample has the potential to be used as a cable insulator.
Pengaruh CaCl2 Terhadap Ukuran Partikel Nanotitania Dari Titanium Isopropoksida Johar Sitohang; Posman Manurung; Rudy Situmeang
Jurnal Teori dan Aplikasi Fisika Vol 3, No 2 (2015): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v3i2.1301

Abstract

Telah dilakukan sintesis dan karakterisasi nanotitania (TiO2) dengan metode sol-gel.Titanium isopropoksida (TTIP) dan CaCl2 dicampur dengan methanol. Desain mikrostruktur dilakukan dengan variasi CaCl2adalah masing-masing 0,06; 0,08; 0,10; 0,11; 0,12 M. Kalsinasi dilakukan pada 400oCselama 10 jam.Karakterisasi dilakukan dengan Transmission Electron Microscopy (TEM) untuk melihat ukuran partikel. Hasil analisis TEM menunjukkan ukuran partikel berada dalam kisaran 15 sampai 23 nm.Secara umum, ukuran rata-rata partikel adalah18,52 nm.
KARAKTERISTIK FUNGSIONALITAS DAN MIKROSTRUKTUR KOMPOSIT ASPAL-SILIKA-KARBOSIL Lady Permatasari; Simon Sembiring; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol 10, No 1 (2022): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v10i1.2908

Abstract

Synthesis and characterization of asphalt have been modified with silica and carbosil composite. This research was conducted to determine the functionality and microstructure of the asphalt-silica-carbosil composite with a weight composition ratio of 0:50:50; 15:42.5:42.5; 20:40:40; 25:37.5:37.5; 30:35:35; 35:32.5:32.5. Silica is obtained from rice husk using the sol gel method and carbosil was obtained by the pyrolysis method. The results of FTIR analysis obtained that the functional groups formed from each composition variation were O-H, C-H, C≡C, C=O, Si-O-Si, and Si-O. The results of microstructural analysis showed the presence of lumps scattered on the surface. The composition of the elements formed is dominated by elements of C, Si, O, N, and a little Na, K and S. Variations in the composition of the sample indicate an increase in the density value, a decrease in the value of water absorption and hardness.Telah dilakukan sintesis dan karakterisasi aspal yang dimodifikasi dengan komposit silika dan karbosil. Penelitian ini dilakukan untuk mengetahui fungsionalitas dan mikrostruktur komposit aspal-silika-karbosil dengan perbandingan komposisi berat 0:50:50; 15:42.5:42.5; 20:40:40; 25:37.5:37.5; 30:35:35; 35:32.5:32.5. Silika diperoleh dengan menggunakan metode alkalis dan karbosil diperoleh dengan metode pirolisis. Hasil analisis FTIR diperoleh gugus fungsi yang terbentuk dari setiap variasi komposisi yaitu O-H, C-H, C≡C, C=O, Si-O-Si, dan Si-O. Hasil analisis mikrostruktur menunjukkan adanya gumpalan yang mengindikasikan sebagai silika-karbosil yang tersebar di permukaan. Komposisi unsur yang terbentuk adalah didominasi unsur C, Si, O, N, dan sedikit Na, K dan S. Variasi komposisi sampel menunjukkan adanya peningkatan nilai densitas, penurunan nilai daya serap air dan kekerasan.
Pengaruh Variasi NaOH terhadap Karakteristik Nanosilika Berbasis Batu Apung Nurqori Setiawati; Posman Manurung; Simon Sembiring
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1842

Abstract

Nanoparticle of silica from pumice rockhas been synthesizedby using extracted method of NaOH with varying of 2,5 Mand 3,5 M.The pumice was extracted using NaOH, silica titration usingH2SO4 and purification of silica using HCl. The solution was calcination at 700°C for 2 hours. The XRD result showed that diffraction pattern of amorphous silica. The EDS result confirmed the purity of silica for NaOH 3,5 M were 75,84%. Particle size from TEM result is(11,32 ± 0,922) nm for NaOH 3,5 M. The surface area for NaOH of 2,5 M and 3,5 M are 178,7 m2/g and186,2m2/g respectively.
Pengaruh Ethanolamina (MEA) dalam Pembentukan TiO2 dari Bahan Awal Ti Butoksida Rika Rahayu; Posman Manurung; Yanti Yulianti
Jurnal Teori dan Aplikasi Fisika Vol 7, No 2 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i2.1946

Abstract

Titanium dioxide has been prepared through the sol gel method using the addition of ethanolamine. The research was conducted to study the effect of MEA on the formation of TiO2. The amount of MEA was varied to 0; 0.5; 1; 1.5; and 2 ml respectively. The samples were calcined at a temperature of 500 ºC. TiO2was characterized using X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and photocatalyst tests using UV lamps. The XRD characterization results showed that in the A  sample an anatase phase was formed whereas in the Csample an anatase phase and a brookite phase were formed. The resultof TEM characterization using ImageJ software show that the particle size of TiO2 is26,1  nm, respectively. The results of the characterization of the fastest photocatalyst catalyst test occurred in sample C which the variation of MEA is 1 ml.  
Reversibilitas Reaksi Elektrokimia pada Elektroda Superkapasitor Zeolit Berbasis Silika Sekam Padi yang Dikalsinasi pada Suhu 450, 550, dan 650℃ Fatia Ulfah; S Suprihatin; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol 5, No 1 (2017): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v5i1.1356

Abstract

Zeolite based silica rice husk has been prepared at temperature of 450, 550, and 650℃. This research was conducted to study the effect of calcination temperature in forming of crystalline phases and standard electron rate constant (k0). The zeolite K450 was formed quartz and bohmite phases, zeolite K550 and K650 was formed cristobalite, stishovite, gamma-alumina, and natrolite phases. Electrochemical reaction of zeolite K450, K550 and K650 are irreversible. Peak potential oxidation-reduction is between 240 mV and 390 mV. The higher value of calcination, the higher value of k0. The k0 value of zeolite K450, K550, K650 at scan rate of 1 V/s are 29,658 x 10-9; 36,398 x 10-9; 77,110 x 10-9 cm/s respectively. Natrolite phase of zeolite K550 and K650 have changed zeolite charge be netral. Based on these result, value k0 of zeolite K550 and K650 are going to be a reversible.
Pengaruh Variasi Konsentrasi HCl Pada Pembentukan Nanosilika Berbasis Batu Apung Lusi Vusfita Sari; Posman Manurung; Yanti Yulianti
Jurnal Teori dan Aplikasi Fisika Vol 7, No 2 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i2.1945

Abstract

The aims of this research is to determine the effect of variation concentration of HCl on chemical composition, phase formed, and particle size on pumice powder. Nanosilica is made using the solgel method with NaOH concentration 4 M, H2SO4 5 M and variation concentration of HCl 0,5; 0,75; 1; 1,25 dan 1,5 M. The XRF results showed the greatest chemical composition value in the silica pumice powder sample with a value of 77.80%. This value is higher after synthesis at the highest chemical composition value in the nanosilica sample 1,25 M HCl concentration of 87.05%. The XRD results show a diffractogram of pumice powder samples formed by anorthite and albite phases while in the nanosilica sample 1,25 M HCl concentrates are debated with the amorphous phase. The TEM results show particle size of nanosilic sample 1,25 M HCl concentration is 5 nm with average particle size (12.02 ± 3.23) nm.
Pengaruh Variasi Konsentrasi NaOH Optimum pada Pembuatan Nanosilika dari Batu Apung Zahra Maria Ulfa; Posman Manurung; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol 8, No 1 (2020): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v8i1.2262

Abstract

Kemajuan tekhnologi di bidang nanomaterial membuat beberapa industri pengolahan silika sudah mulai memproduksi nanopartikel silika sehingga pencarian sumber-sumber baru yang mampu memproduksi silika telah banyak diminati. Salah satu sumber daya mineral yang berpotensi untuk dikembangkan adalah silika (SiO2). Batu apung adalah batu vulkanik berpori amorf yang terdiri dari silika. Pada penelitian ini dibuat nanosilika dari batu apung dengan diekstraksi menggunakan larutan NaOH pada variasi konsentrasi 2,5 M, 2,7 M, 2,9 M, 3,1 M dan 3,3 M untuk mengamati pengaruhnya pada jumlah dan komposisi kimia serbuk nanosilika yang dihasilkan, fasa nanosilika yang terbentuk dan ukuran  nanosilika. Ekstraksi silika ini dibuat dengan metode sol-gel menggunakan refluks. Pembentukan gel silika dilakukan menggunakan H2SO4 5M dan proses pemurnian serbuk silika menggunakan HCl 1,25 M kemudian dikalsinasi pada suhu 800oC selama 6 jam dan dikarakterisasi dengan XRF, XRD, TEM dan FTIR. Hasil yang diperoleh pada penelitian ini menunjukkan pengaruh konsentrasi NaOH pada jumlah serbuk yang dihasilkan yaitu meningkat seiring peningkatan konsentrasi NaOH yang digunakan. Komposisi SiO2 dari semua sampel menunjukkan hasil optimum pada sampel dengan konsentrasi NaOH 2,7 M yaitu 97,1% yang juga memiliki ikatan SiO-Si dan Si-OH, meiliki fasa amorf dan rata-rata ukuran partikel adalah (11,9±2,6) nm.
Sintesis dan Karakterisasi ZrO2-CuO Sebagai Fungsi Perbandingan Mol Windhini Anggraeni; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol 2, No 2 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i2.1265

Abstract

Telah dilakukan preparasi ZrO2-CuO dengan metode sol-gel. Bahan awal yang digunakan adalah zirkonium klorida dan tembaga nitrat. Komposisi ZrO2-CuO dilakukan dengan variasi perbandingan antara ZrO2-CuO. Serbuk dicetak menjadi pelet lalu dikalsinasi pada suhu 700 ºC selama 10 jam. Sampel dikarakterisasi dengan X-Ray Diffraction (XRD) dan Scanning Electron Microscopy (SEM) untuk mengetahui karakteristik struktur kristal dan mikrostruktur. Hasil karakterisasi XRD pada sampel dengan komposisi ZrO2-CuO 1 : 8 menunjukkan bahwa puncak CuO (tenorite) lebih tinggi daripada perbandingan yang lain dan penambahan CuO sebagai dopan menurunkan ukuran kristal ZrO2. Pada hasil XRD ukuran butir pada komposisi 1 : 1 adalah 313 nm dan komposisi 1 : 8 adalah 77 nm. Hasil karakterisasi SEM menunjukkan mikrostruktur pada perbandingan ZrO2-CuO 1 : 8 semakin kecil dan merata dibandingkan dengan sampel perbandingan 1 : 1.
Pengaruh Temperatur Austenisasi terhadap Struktur Mikro dan Nilai Kekerasan Material 14%Cr-3%Ni-2%Mo-2%C untuk Aplikasi Bola Gerus Imaniar Romaeni; Posman Manurung; Fajar Nurjaman
Jurnal Teori dan Aplikasi Fisika Vol 5, No 2 (2017): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v5i2.1381

Abstract

This study was conducted to determine the effect of heat treatment in the form of sub-critical, austenization, quenching and tempering the hardness values of the white cast iron material as consideration for testing wear resistance of local and foreign products as grinding balls. Samples was treated sub-critical at a temperature of 700°C with a hold time of 2 hours and continued with austenization temperature variation of 850, 950 and 1050°C with a hold time of each sample is 5 hours. The optimum hardness value was obtained at a temperature of 950°C austenization in the amount of 68.3 HRC and decreased at a temperature of 1050°C. It is because the solubility of carbon elements making up the matrix. Next will be tempering at a temperature of 250°C and holding time 2 hours hardness values decreased but the value of wear resistance is obtained even better ie grinding balls of 0.03 g/kg of product due to the combination of its constituent elements, namely chromium-molybdenum and nickel are high the presence of wear phenomena induced martensite.
Co-Authors Abdurrahman, Ahmad Faruq Agnesia, Donna Agus Riyanto Agus Riyanto Agus Riyanto Agus Riyanto Agus Suyatna Ahmad Rosadi Alfin Edo Kaisar Lubis Amir Supriyanto Anggi Puspita Dewi Anggi Stevani Anggraini, Adeliya Ayu Anggraini, Anisyah Aprilia, Ayu Arya R. Syah Ayu Aprilia Benyamin, Chairunissa A Chandra Ertikanto Craig Buckley Delfi Oktavia Amrani Della M. Andini Dita Rahmayanti Dwi Asmi Ediman Ginting Ediman Ginting Ediman Ginting Suka Erika Sempana Ginting Fajar Nurjaman Faradilla Syani Fath, Yusril Al Fatia Ulfah Fegi Liani Firdaus, Iqbal Futichah Futichah Gregorius N. Susanto Gultom, Rysa Sonya Reni Paulin Hasni Handayani Imaniar Romaeni Indra Pardede Iqbal Firdaus It Meng Low Jayanti Pusvitasari Johar Sitohang 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, 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 Pauzi, Gurum Ahmad Pertiwi, Salwa Dian Prihanto, Surya 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 Sari, Tria Permata Sembiring, Simon Sempana, Erika Shabrina, Shabrina Yakosati Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Siti Fadilah Sitohang, Rosanti sri wahyu suciayti Sri Wahyu Suciyati Sri Wahyu Suciyati Sukma Wibowo Sumardi . Sumardi, Sumardi Sumiyati Sumiyati Supardi Supardi Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Syafriadi Syafriadi Syafriadi Syafriadi 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 Zaharani, Rethanita Zahra Maria Ulfa