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All Journal Jurnal Ilmu Dasar Jurnal Sains dan Teknologi JFA (Jurnal Fisika dan Aplikasinya) Science and Technology Indonesia SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Kreativitas PKM JIEMS (Journal of Industrial Engineering and Management Systems) Jurnal Teori dan Aplikasi Fisika Piston: Journal of Technical Engineering Jurnal Fisika Indonesia Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Journal of Energy, Material, and Instrumentation Technology RENATA Jurnal Pengabdian Masyarakat Kita Semua JURNAL REKAYASA KIMIA & LINGKUNGAN

Pulung Karo-Karo

Universitas Lampung

Author-ID : 295984

Aerospace Engineering Agriculture, Biological Sciences & Forestry 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 Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Pengaruh Konsentrasi Ekstrak Kulit Buah Maja (Aegle Marmelos (l.) Corea) terhadap Laju Korosi Baja Karbon API 5L pada Medium NaCl 3% dan H2SO4 3% amilia rasitiani; Ediman Ginting; Pulung Karo karo
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.v6i2.1837

A study has been conducted on the extract concentration effect of Maja Peel as an inhibitor of low carbon API 5L in corrosive medium of NaCl 3% and H2SO4 3%. The soaking process of low carbon API 5L was done for 35 days with variation of addition inhibitor concentrations at 0%, 0,4%, 0,5%, 0,6%, 0,7%, and 0,8%. The testing of Corrosion rate is done by weight loss method. The results showed that the highest corrosive rate in corrosive medium of NaCl 3% and H2SO4 3% was at 0% which is inhibitor concentration, 0,06 x 104 mm/y and 16,55 x 104 mm/yconcentration. Meanwhile, the lowest corrosion rate at 0.8% inhibitor concentration for corrosive medium ofNaCl 3% and 0.5%for H2SO43% corrosive medium. Hence, the greatest effectiveness of corrosion occurs at the concentration of 0.8% in a corrosive medium of NaCl 3% with effectiveness of 85,71% and 0.5% in corrosive medium of H2SO4 3% with the effectiveness of 79.35%. The characterization result of X-Ray Diffraction (XRD) shows that the phase formed is pure Fe. Characterization of Scanning Electron Microscopy (SEM) showed uneven clusters and smaller sizes, holes and cracks also with less than 0.8% inhibitors for corrosive medium of NaCl 3% and 0.5% for corrosive medium of H2SO43% compared with 0% inhibitor of maja peel extract on corrosive medium ofNaCl 3% and H2SO4 3%. Characterization of Energy Dispersive Spectroscopy (EDS) in samples with corrosive medium of H2SO43% obtained the element S (Sulfate)

Efek Penambahan Fe3Mn7 Terhadap Sifat Fisis dan Mekanik α-Fe2O3 Eko Arief Setiadi; Wini Rahmawati; Pulung Karo Karo; Muhammad Yunus; Perdamean Sebayang
Piston: Journal of Technical Engineering Vol 1, No 1 (2017)
Publisher : Prodi Teknik Mesin

Preparasi dan karakterisasi pellet α-Fe2O3 dengan penambahan 0, 2, 5 dan 10 %wt. Fe3Mn7 berbasis pada material alam telah berhasil dilakukan. Proses pencampuran serbuk α-Fe2O3 dan Fe3Mn7 dilakukan dengan menggunakan HEM. Kemudian campuran serbuk dikasinasi pada suhu 1000 ºC, dikompaksi pada 69 Pa hingga menjadi pellet dan disinter pada suhu 1000 ºC. Karakterisasi XRD menunjukkan adanya fasa dominan α-Fe2O3 dan fasa baru MnO2 dan Fe3O4. Densitas dan kekerasan sampel meningkat secara linier seiring dengan kenaikan komposisi Fe3Mn7 yang ditambahkan. Sampel optimum diperoleh pada sampel α-Fe2O3/10 %wt. Fe3Mn7 dengan nilai bulk density dan kekerasan masing-masing 4,98 g/cm3 and 994,94 HV. Sampel ini termasuk dalam klasifikasi hard magnet dengan nilai magnetisasi saturasi, remanen dan koersivitas masing-masing sebesar 24,0 emu/g, 10,3 emu/g dan 571,8 Oe.

Coal Ash Characteristic from Bukit Asam as Raw Material for Ceramics Production Pulung Karo-Karo; Simon Sembiring
Jurnal ILMU DASAR Vol 9 No 2 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1323.743 KB)

This study was carried out to characterize coal ash obtained from Bukit Asam, Tarahan Lampung, after the samples were sintered at various temperatures ranging from 900C - 1300C. The characteristics of the investigated samples included density, porosity, hardness, structure and microstructure. The results indicated that porosity decreased with increasing sintering temperature, while density and hardness increased with increasing temperature. The x-ray diffraction (XRD) study revealed that the main crystalline phase was silicon dioxide (SiO2), with the minor constituents of CaSiO2, MgSiO3, FeSiO4 and Ca12Al14O33. SEM investigations clearly demonstrated the presence of a fine crystallised phase dispersed in the microstructure.

Pengaruh Variasi Waktu Sintering Terhadap Pertumbuhan Fase Bahan Superkonduktor BSCCO-2212 dengan Kadar Ca=1,10 Menggunakan Metode Pencampuran Basah Karlina Rahmah; Suprihatin Suprihatin; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

This research was conducted to determine the effect of sintering time on the formation of the superconducting phase BSCCO-2212 by calculating the level of purity of the phases formed and looking at the microstructure. The variation of sintering time was 10, 20, 30 and 40 hours using the wet mixing method. The sample was calcinated with 800 °C for 10 hours and sintered with 830 °C. The XRD’s characterization result shows a decrease in phase purity with increasing the sintering time. The relative high volume fraction of the BSCCO-2212/ts10 sample is 90,48% while, the lowest volume fraction of BSCCO-2212/tc40 is 50,74%. The relative high orientation degree of BSCCO-2212/ts20 is 18,47% and the lowest orientation degree of BSCCO-2212/ts10 is 8,4%. The SEM’s characterization result shows of all samples have been oriented and have relatively little space between slabs (voids).

Analisis Batubara Jenis Antrasit di PTBA Berdasarkan Kandungan Volatile Matter dan Kalori Yohanes W.M Purba; Pulung Karo Karo; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

This research Coal is one of the sedimentary fossil fuels that can ignite, is formed from organic sediment, and the remains of plants are then formed through the process of coalification. The main element consists of carbon, hydrogen, and oxygen. The formation of coal has certain conditions and only occurs in certain eras throughout geological history. The carbon age was approximately 340 million years ago. In the Permian Age or the Paleozoic era, 270 million also formed the most productive coal which is almost the entire coal deposit (black coal) in other parts of the earth. In this study we conducted at the Laboratory of PT. Bukit Asam tbk. Observation Results in the Study of Average Volatile Matter 19.11, Max Volatile Matter value 38.34, Min Vollatie Matter value 11.34. And the Average Calorie Result of 7578.5 Kacl / Kg, Max Calorie Value of 8046 Kcal / Kg. In this study, it was proved that coal samples were Anthracite types.

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.

Analisis Pertumbuhan Fase Superkonduktor BSCCO-2212 dan BPSCCO-2212 Akibat Variasi Suhu Sintering Menggunakan Metode Pencampuran Basah Pulung Karo Karo; Risky Putra Ramadhan; Suprihatin Suprihatin; Yanti Yulianti
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 4 (2021): 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.v2i4.77

The research was conducted to determine the effect of sintering temperature on the level of purity of the superconducting phase BSCCO-2212 and BPSCCO-2212 using the wet mixing method. Sintering was carried out for 20 hours with variations in sintering temperature: 825, 830, 835 and 840°C. XRD results showed that the phase purity level increased until it reached the optimum point at 835°C sintering temperature and then decreased at 840°C. The highest volume fraction of the BSCCO-2212 sample was obtained at a sintering temperature of 835°C at 71.09% and the highest degree of orientation was obtained at a sintering temperature of 830°C at 26.44%. In the BPSCCO-2212 sample, the highest volume fraction was obtained at a sintering temperature of 835°C at 52.59% and the highest degree of orientation at a sintering temperature of 830°C at 43.49%. The results of the comparison of BSCCO-2212 and BPSCCO-2212 samples showed that the BPSCCO-2212 sample had a higher level of phase purity than BSCCO-2212.

EKSTRAK DAUN SAWO (Manilkara zapota L) SEBAGAI INHIBITOR TERHADAP LAJU KOROSI BAJA AISI 1018 DALAM MEDIUM KOROSIF NaCl 3% Riski Wulan Sari; Ediman Ginting Suka; Pulung Karo Karo
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.v3i1.86

This research aims to determine the effectiveness of sapodilla leaf extract (Manilkara zapota L) as inhibitor on AISI steel in corrosive medium NaCl 3 %. Specifically, the purpose of this research is to know the effect of the addition of 0%, 2% and 4% inhibitor concentration of sapodilla leaf extract and 3 days, 6 days and 9 days to the corrosion rate. To find out the corrosion rate resulted by weight reduction method with an inhibitor efficiency value of 59,2%. The x-ray diffraction (XRD) results show that the phase formed is pure Fe phase. The results of scanning electron microscopy (SEM) show the presence of lumps on steel surfaces of various sizes which are the product of corrosion. This is reinforced by the results of energy dispersive spectroscopy (EDS) which shows that the increasing number of lumps on the steel surface leaves fewer Fe elements.

Analisa Pengaruh Penambahan Variasi Bubuk Andesit Terhadap Karakteristik Kuat Tekan Mortar Herullah Herullah; Pulung Karo Karo; Yayat Iman Supriyatna; Muhammad Amin
Jurnal Teori dan Aplikasi Fisika Vol 6, No 1 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i1.1820

The effect of andesit powder addition variety on the properties of the mortar compressive strength was carried out. This study aims to investigate the effect of andesit powder addition variety on the properties of mortar compressive strength which is added on mortar blend by comparing mortar without the addition of andesit powder. Mortar with various andesit powder contents (10, 20, 30, 40 and 50 % by weight respectively) as partial replacement of portland cement at the age of 7, 14 and 28 days curing. The results show that the compressive strength of each ages with andesit powder addition is higher than mortar without the addition of andesit powder. The highest compressive strength are 11.8, 14.3 and 17.4 MPawith andesit powder respectively and 5.6, 7.56 and 11.00 MPa regarding to the mortar without andesit powder. Therefore 30% seems to be the optimal as partial replacement cement level. The results show with decreasing porosity on the mortar, the density will be greater and solid, it will decrease the absorption. The results of X-Ray flourescene indicate that the chemical element of Si, Al and Fe increase with increasing the dosage of andesit powder which is added on mortar blend. Consequently the Ca element may decrease by addition of andesitpowder on mortar endlessly. The X-Ray Diffraction shows the coestite and hematite phase after temperature 900 oC calcination.

Studi Luas Permukaan Spesifik Zeolit Akibat Pengaruh Mikrostruktur dan Potensinya Sebagai Elektrode Superkapasitor Jennifer Kapriati Pakpahan; Pulung Karo Karo; Bambang Joko Suroto
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.v5i1.1354

The synthesis of zeolite based rice husk silica by using sol-gel method with heat treatment 450 oC, 550 oC, dan 650 oC has been investigated. This research was conducted to study the effect of particle size and pore size to specific surface area of zeolit. The characteristics of samplewere observed byX-Ray Difraction (XRD), Scanning Electron Microscopy (SEM), and specific surface area with Branauer Emmet Teller (BET). The research result showed that the structure was amorf with cristobalite, corundum, and delta-Al2O3 phase. The heat treatment of 450 °C showed the smallest particle size amounted to 16,322 μm and the largest pore size amounted to 5,786 μm with the highest specific surface area amounted to 216,250 m2/g, so it is potential to be used as a supercapacitor electrode.

Co-Authors Abdurrahman, Ahmad Faruq Achmad Shofi Agus Riyanto Ahmad Saiful Munir Alfi Hamidah Amilia Rasitiani Anggun Mersilia Anton Sapto Handoko Aprilia, Ayu Apriliana Apriliana Aris Pratama Bambang Joko Suroto Birawidha, David Candra Candra Kurniawan Delfi Oktavia Amrani Dwi Asmi Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Suka Ediman Ginting Suka Eko Arief Setiadi Elsa Mega Puspitaratu Fajar Nurjaman Fitri Fitri Herullah Herullah Indah Pratiwi Indriyawati, Agapetalia Intan Wandira Iqbal Firdaus Ismi Nurhayati Isnugroho, Kusno Iwan M Ridwan Jayanti Pusvitasari Jennifer Kapriati Pakpahan Junaidi Junaidi Junaidi Junaidi Karlina Rahmah Malik, Daffa Abdul Mareli Telaumbanua Marjunus, Roniyus Muhammad Amin Muhammad Amin Muhammad Nursani Muhammad Rizki Muhammad Yunus Nabilah Rafidiyah Nia Diana Nindia Agustin Oktaviando, Fany Oktivianty, Shella Windi Parmadean Subayang Pauzi, Gurum Ahmad Perdamean Sebayang Posman Manurung R Rosalina Rianita Nurhasanah Rio Orlando Pratama Riski Wulan Sari Risky Putra Ramadhan Rizky Damayanti Rudy T M Situmeang S Suprihatin Sembiring, Simon Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Slamet Sumardi, Slamet Sri Harjanti Suci Pangestuti Sudibyo Sudibyo Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Sutopo Hadi Syafriadi Syafriadi Syafriadi Syafriadi Syah, Aminudin Telaumbanua, Syukur Trianasari, Trianasari Vega Rahmawati Ar Wahyuningsih Wahyuningsih Wasinton Simanjuntak Wini Rahmawati Wisnu Ari Adi Yanti Yulianti Yanti Yulianti Yanti Yulianti Yayat Iman Supriyatna Yayat Iman Supriyatna Yohanes W.M Purba Yusup Hendronursito, Yusup Zahra Maria Ulfa

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