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INDONESIA
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Published by Universitas Negeri Jakarta
ISSN : 23021829     EISSN : 24769398     DOI : https://doi.org/10.21009/03
Core Subject : Science, Education, Engineering,
Electrical & Electronics Engineering Energy Physics Other
Focus and Scope: Physics education Physics Instrumentation and Computation Material Physics Medical Physics and Biophysics Physics of Earth and Space Physics Theory, Particle, and Nuclear Environmental Physics and Renewable Energy
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 976 Documents
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ANALISIS KARAKTERISASI XRD SINTESIS MATERIAL La0,7Ca0,3(Mn,Co)O3 MELALUI METODE MECHANICAL ALLOYING Anggita Prasanti; Riser Fahdiran; Sitti Ahmiatri Saptari; Erfan Handoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Perovskite manganites materials La0,7Ca0,3Mn1-xCoxO3 with x = 0 and x = 0.1 through mechanical alloying method to characterize x-ray difraction has been synthesized. Material consisting of La2O3, CaO, MnCO3, and Co3O4 mixing by high energy ball mill for 1 hour and produce a homogeneous mixture followed by calcination at 750 ° C and molding sample pellets and sintering at 1100 ° C for 3 hours and monoclinic crystal structure with lattice parameters for x = 0 a = 7.752 Å; b = 5.463 Å; c = 5.466 Å and 231.54 A3 cell volume with 39.27 nm crystal size and density ρ = 6.93 g / cm3, while for x = 0.1 a = 7.742 Å; b = 5.470 Å; c = 5.460 Å and 231.23 A3 cell volume with 40.29 nm crystal size and density ρ = 6.95 g / cm3 with x-ray diffraction measurements as a result. Specification phase as a resukt of qualitative analysis and crystal size as a result of quantitaive analysis explained that the substitution can be done. Keywords: perovskite manganites, mechanical alloying, High Energy Ball Mill, X-ray Diffraction, Monoclinic.
SINTESIS DAN KARAKTERISASI XRD BAHAN KERAMIK Ca0,95Ba0,05TiO3 MELALUI METODE KOPRESIPITASI Anthon Toim; S. Suasmoro
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

SYNTHESIS AND CHARACTERIZATION XRD OF CERAMIK MATERIALS Ca0,95Ba0,05TiO3 BY COPRECIPITATION METHOD. Calsium Barium Titanate of ceramic materials (CaBaTiO3) has been synthesized by coprecipitation method. Synthesis of Ceramic materials CaBaTiO3 using TiCl4 raw materials, CaCl2.2H2O, BaCl2.2H2O, and H2C2O4 was supplied by E.Merk with level ‘reagent grade’. CaBaTiO3 powders calcined at temperature of 700ºC, 800ºC, and 900ºC for two hours.Calcination powder CaBaTiO3 refers to the result of Thermal analysis (DTA). CaBaTiO3 was formed at calcination temperature of 900ºC afterword pellets was made with a diameter of 10,662 mm, 2,844 mm thick, and then sintered at temperatur 1200 ºC,1300 ºC,and 1400 ºC for 4 hours. The samples were analized by X-ray diffraction to determine the phase after heat treatment and to determine the crystaline lattice. Phase identification after heat treatment know as ‘search matched’ was caried out by Philps X’pert HighScorePlus software, afterword crystal analysis using rietica software. The result of the analysis showed the ceramic materials CaBaTiO3 form a single phase at the sintering temperatur of 1400ºC perovskite structure with space group Pnma(62) and lattice parameter a = 5,30299 Å, b =5,46031 Å, and c = 7,60411Å. and powder CaBaTiO3 at calcination temperature of 900 ºC perovskite structure with space group Pbnm(62) and lattice parameter a = 5,39672 Å, b =5,44062 Å, and c = 7,64439 Å Keyword:CaBaTiO3, Coprecipitation,X-ray diffraction.
PENGEMBANGAN TURBIN ANGIN SUMBU VERTIKAL TIPE TRIPLE-STAGE SAVONIUS DENGAN POROS GANDA Chamdani Irwan Saputra; Cecep E. Rustana; Hadi Nasbey
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

This research is the development of vertical axis wind turbines savonius type of triple stage with double shaft. This type of turbine is a vertical turbine that utilizes the drag force and can rotate at low wind speeds. This turbine uses pulley and belt transmission system. The aim of this study is expected to increase the efficiency of the resulting value of vertical axis wind turbines of type triple - stage savonious. The turbine is designed to make six rotor with three rotor of each shaft. Materials for rotor using the pipe pvc with dimensions of each rotor diameter of 20 cm and a height of each rotor is 19 cm. The research method used was experimental , with direct measurements using a laboratory scale wind tunnel device as the source of the wind. From the test results of rotor arrangement with angel 0 o , this turbine is able to produce a power output of 0.239 watt with efficiency at 2.17%. Keywords: wind, savonius turbine, pulley, belt, double shaft, efficiency.
PEMBUATAN DAN KARAKTERISASI SIFAT FISIKA GREEN CARBON PAPER TANPA PEREKAT MENGGUNAKAN LIMBAH BIOMASSA E. Taer; Desmawati Desmawati; Sugianto Sugianto; R. Taslim
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Preparation and characterization of green carbon paper (GCP)without adhesive material using waste biomass has been successfully created. (GCP) made using biomass material from banana peels. GCP-The production of GCP was begins with the grinding process with a time of 5 and 15 minutes. After grinding process followed by casting used a container with an area of ​​each 18 cm x 8 cm, 12 cm x 8 cm and 9 cm x 7 cm respectively. The next process is followed by a drying process at a temperature of 140o C for 24 hours. Characterization of physical properties are performed on samples GCP ware used Scanning electron microscopy (SEM) to determine the topology and surface morphology, energy dispersive X-ray (EDX) to determine the content of the element, and the X-ray diffraction to determine the degree of cristalinity. Measurements of weight, thickness and wide of sample GCP also perfomed to calculate density values. Based on dimention and weight measurements have been calculated the density value for various milling of GCP ware 0.825 g /cm3 and 0.698 g/cm3respectively. Characterization XRD showed GCP amorphous carbon is characterized by the presence of peaks at angles 2θ = 23,936o and 48,939o. Based on SEM measurements indicated that the particles are the building blocks of the GCP in the form of aglomerate. Keywords : Green Carbon Paper, Banana Peel, Physical Properties.
Sintesis Barium Heksaferrit Tipe W Melalui Metode Mechanical alloying Desriyan Lestari; Widyaningrum Indrasari; Erfan Handoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

W-type Barium hexaferrite with a crystal structure BaMe2Fe16O27 (Me is a divalent metal) has a good magnetic properties and high value of currie temperature. Ion substitution on W-type Barium Hexaferrite can be improve the properties of W-type Barium Hexaferrite. For this research, substitution Fe by ion Co and Ti with x = 0 and 0.1 by mechanical alloying method will be performed. Mixing of basic materials BaCO3, Fe2O3, Co3O4, and TiO2 by milling process using high energy ball mill in a wet milling condition using toluene for 1 hour followed with calcination and sintering. Then Crystal structure in the sample will be analyzed using XRD (X-Ray Diffraction) with CuKα radiation. The calculation of the phase BaCoTiFe16O27 (x = 0) obtained values of lattice parameters a=b= 5.886 Å dan c= 23.236 Å, while the phase BaCoTiFe15.8Co0.1Ti0.1O27 (x = 0.1) obtained values of lattice parameters a=b= 5.894 Å dan c= 23.257 Å. Keywords: W-type Barium Hexaferrite, Mechanical Alloying, X-Ray Diffraction, Lattice Parameter, Grain Size, Volume Unit Cell.
PENGARUH KONSENTRASI LARUTAN KOH PADA KARBON AKTIF TEMPURUNG KELAPA UNTUK ADSORPSI LOGAM Cu Erlina Erlina; Umiatin Umiatin; Esmar Budi
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

The research on the manufacture of activated carbon made from coconut shell charcoal by using chemical and physical activation has been done. Chemical activation was done by soaking the granulated charcoal into the activator solution of Potassium Hydroxide (KOH). And physical activation was done by passing argon gas into the furnace. The purpose of this research was to determine the effect of variations concentration of the activator solution to the adsorption power of activated carbon for removed heavy metal Cu. Chemical activation was done by soaking the samples for 24 hours in a solution of KOH 30%, 40%, 50% and 60%. While the physical activation was done by using a horizontal furnace at a temperature of 400oC for 1 hour with argon gas flow rate of 200 kg/m3. Samples that have been activated were tested for their ability to adsorb Cu in solution Copper Sulfate. Filtration process used is a batch method, in which the samples were stored in waste and stirred using a magnetic stirrer. The results of analysis by Atomic Absorption Spectrophotometer (AAS) showed the highest adsorption efficiency by 50% KOH activation of 83.57%. And the results of tests that have been performed, the greater the concentration of KOH were given the higher efficiency of adsorption of the Cu metal. But for 60% KOH concentration adsorption efficiency decreases due to pore activated carbon saturated so that the adsorption power decreases. Key words: activated carbon, Potassium Hydroxide, Adsorption, heavy metal.
REVIEW: MENENTUKAN PERBANDINGAN JARI-JARI IONIK ATOM KECIL DENGAN ATOM BESAR (r/R) DAN SUDUT APIT (ÆŸ) PADA STRUKTUR KRISTAL TETRAHEDRON DENGAN TEORI MENELAUS Irzaman Irzaman; Raden Silfia Epriyanti; Johan Iskandar; Ade Kurniawan; Aminullah Aminullah
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Study of crystal structure of ceramic materials was one of chapters in Solid State Physics for undergraduate curriculum in Indonesia. Tetrahedron crystal structure was interesting to be reviewed in order to provide an understanding to the students for analyzing the ionic radius ratio of small and large atoms (r/R) as molecul composer in ceramic materials. Study of ratio on tetrahedron crystal structure (coordination number of 4) was more difficult than octahedron (coordination number of 6) as well as cubic structures (coordination number of 8), because on tetrahedron, small atoms bound four large ionic atoms which were located in three-dimensional space that causing the wedge angle (ɵ) became not perpendicular to each other. A review of tetrahedron crystal structure using mathematical physics analysis of Menelaus theorem resulted r/R ratio of 0.225 with wedge angle of 109.5o. Key words: crystal structure, ionic radius, Menelaus theorem, ratio of r/R, tetrahedron.
KARAKTERISASI PARTIKEL PRA-KARBON DARI BUNGA RUMPUT GAJAH (PENNISETUM POLYSTACHYON) DENGAN CAMPURAN SURFAKTAN ANIONIK SODIUM DODESIL SULFAT SEBAGAI BAHAN DASAR SUPERKAPASITOR E. Taer; H. Halim; R. Farma; R. Taslim
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

A research on the manufacture of pre-carbonized particles (PCP) in nano-meter size from elephant grass flower has been studied. The process of making (PCP) using a combination of ballmilling methods and the addition of the anionic surfactant sodium dodecyl sulfate and followed by chemical activation using KOH. Pre-carbonization processes carried out at a temperature of 280 °C and then followed by milling and sieving process to obtain the particle size smaller than 38 μm. The next stages of the sample (PCP) is mixed with a two concentrations of surfactant are 0.5 M and 1.5 M. The final stages to produce the (PCP) using a process of ballmilling with milling time of 80 hours and was closed by chemical activation using KOH activator with a concentration of 0.7 M. Scanning Electron Microscope (SEM) images showed the (PCP) in the particle size range of 100 - 200 nm. Analysis with energy dispersiv X-rays showed the carbon contentin in the sample of 52%. Results of X-ray data diffraction found that the carbon peak at 2θ angles, namely 26,2690 and 45,3470 that describes the elements carbon with a crystal orientation (002) and (100). Keywords:Elephant Grass, surfactants, Ballmilling, Partikel Pre-carbon.
Desain dan Performansi Turbin Ventilator Angin Yang Dibuat dari Generator Sepedamotor M.N. Indro; T. Sumaryada; V.N.H. Lyjamil
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

In this paper we present our research on the design and performance of ventilator wind turbine. The generator for the wind turbine was taken from a used motorcycle’s generator. The weight of this generator has to be reduced almost a half from its previous weight (from 0.80 kg to 0.40 kg), otherwise the wind turbine will not rotate at all. The generator consist of 8 coils arrange in north-south pole adjacently. By varying the number of turns in each coils we could check the performance of the turbine in medium and fast wind speed. our results show that the output power of the ventilator wind turbine depend linearly on the number of turns and the wind speed. For medium wind speed (4 m/s), the highest efficiency is found to be 2.4 % with the output current and voltage are 24.33 mA and 6.00 Volt consecutively. For high wind speed (5 m/s), the highest efficiency is found to be 2.9 % with the output current and voltage 40.43 mA and 8.50 Volt. Some suggestions to increase the performance of the ventilator wind turbine were also given in this paper. Key words : motor cycle’s generator, output current-voltage, wind turbin ventilatur.
SINTESIS DAN KARAKTERISASI SIFAT MAGNETIK NANOKOMPOSIT Fe3O4 – MONTMORILONIT BERDASARKAN VARIASI SUHU Pintor Simamora; Krisna Krisna
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

This study aims to investigate the characteristics of the magnetic properties of Fe3O4 – Montmorillonite nanocomposite and determine the effect of temperature on the characteristics of Fe3O4 – Montmorillonite nanocomposite. Fe3O4 - Montmorillonite nanocomposite were synthesized using coprecipitation method. Synthesis is done by mixing iron sand with HCl as solvent and NH4OH as a precipitant. The results of the precipitate is then washed repeatedly with distilled water and dried in an oven. Furthermore, the Fe3O4 nanoparticles powder mixed into the montmorillonite which has been diluted with water and then stirred with a magnetic stirrer and heated at temperature variation 40°C, 70°C, and 100°C, then NaOH was added dropwise to 100 ml of water and then washed with aquades and dried in an oven. The resulting nanocomposite characterized by using X-Ray Diffractometer (XRD) to determine the size and content of the crystal phase and Vibrating Sample Magnetometer (VSM) formed to determine magnetic properties of materials. From the test results of X-Ray Diffractometer (XRD) to indicate the size of the crystal Fe3O4 Nanoparticles 34.8691 nm. And Vibrating Sample Magnetometer (VSM) test results values ​​obtained magnetic saturation (Ms) for Fe3O4 nanoparticle samples of 52.15 emu/gr and for the nanocomposite sample at 40°C, 70°C and 100°C values ​​obtained Magnetic saturation (Ms ) is 3.365 emu/gr, 4.635 emu/g, and 4.75 emu/g. While the coercivity field (Hc) of each sample is 0.0102 T, 0.0112 T, and 0.0136 T. From these results it can be concluded that the higher the temperature of the nanocomposite which varied the higher the value of magnetic saturation and field koersivitasnya so the magnetic properties of these materials will be even greater. Keywords: nanocomposite, Fe3O4, montmorillonite, coprecipitation.

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