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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
 47   48   49   50   51 
PEMBUATAN MEMBRAN KERAMIK BERPORI BERBASIS CLAY DENGAN VARIASI ZEOLIT DAN PENAMBAHAN ARANG AKTIF TEMPURUNG KELAPA SERTA POLIVINYL ALCOHOL Mochamad Kurniwan; Agus Setyo Budi; Anggoro Budi Susilo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Membrane separator is a selective barrier that can separate the two phases of the various mixtures (Fauzan, 2009). In this research be made of porous ceramic membranes based on clay with variations zeolite and additives of coconut shell charcoal as well as PVA are made in several different compositions. Zeolite and clay are the main materials of ceramic membrane, whereas coconut shell charcoal and PVA are the additives materials. Tests conducted using water absorption test, density test, and porosity test of the ceramic membrane. The calculation of density and porosity based on ASTM C 20-92 standard with toluena, whereas verification the functionality of ceramic membrane can be adsorb Fe content in groundwater be used AAS, as well as testing SEM to see microstructure membrane formed. The research obtained to the values of water absorption test are 19,802-47,689 %, the values of density test are 0,610-0,953 g/cm3, and the values of porosity test are 21,701-33,446 %. From tested and measured of the sample, can be identified that additives decreased the roughness and density of the sample, increased the absorption and porosity of the sample. Keywords: water absorption, density, porosity, AAS, SEM.
PEMANFAATAN FILTER ZEOLIT UNTUK MENINGKATKAN KUALITAS BIOGAS BERBAHAN BAKU SAMPAH ORGANIK BUAH-BUAHAN Esty Asma Dewanti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Biogas is a gas fuel which is renewable and eco-friendly, content in biogas consists of H2O, CO2, CH4, and H2S. The content of carbon dioxide (CO2) gas high enough in the biogas to heat value decreased during the combustion process, so the process of purification is needed to separate the gas content. One method of purification is to use a zeolite adsorbent. Zeolite adsorption capability of the affected pore surface area, for it required refinement process (milling) zeolites to improve the power filter adsorption. The purpose of this research is to lower the levels of CO2 gas in biogas using milling zeolites have been in the variant time 5 minutes, 10 minutes, 15 minutes in tube purification for 60 minutes. Further analysis is done by using a Gas Analyzer to find out the CO2 gas levels before and after purification using zeolite. Keywords : Biogas, zeolit, CO2, purification, adsorption.
ANALISIS REDUKSI GAS H2S UNTUK MENINGKATKAN KUALITAS BIOGAS BERBAHAN BAKU SAMPAH ORGANIK BUAHBUAHAN Feti Eka Rahayu; Sunaryo Sunaryo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Biogas is flammable gas produced from the fermentation of organic material by anaerobic bacteria-bacteria. Component of biogas, among others, 50-75% CH4, 24-40% CO2 and ± 2% H2S. Hydrogen sulfide in spite of small biogas but simply applied is corrosive, odorless and non-toxic, so it simply applied needs to be reduced in the biogas. The purpose of this research is to reduce H2S gas from biogas. For that, it needs a filter in the form of sand iron that had previously been through a process of refinement with a variation of the time of 5 minutes, 10 minutes, and 15 minutes. The gas formed in a balloon and taken to the laboratory for further test through Gas Analyzer to know the magnitude of the power filter adsorption of gas. After the test is finished, the Gas Analyzer can be analyzed how the power large iron sand filter adsorption of H2S gas. From the results of these tests, we can know the levels of H2S is reduced. Keywords: biogas, anaerob, H2S, Gas Analyzer, filter, adsorption
PENGARUH TEMPERATUR PENGERINGAN PADA AKTIVASI ARANG TEMPURUNG KELAPA DENGAN ASAM KLORIDA DAN ASAM FOSFAT UNTUK PENYARINGAN AIR KERUH Futri Wulandari; Erlina Erlina; Ridho Akbar Bintoro; Esmar Budi; Umiatin Umiatin; Hadi Nasbey
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Telah dilakukan penelitian mengenai pembentukan arang aktif berbahan arang tempurung kelapa sebagai adsorben. Tujuan penelitian ini adalah mengetahui pengaruh temperatur pengeringan pada aktivasi arang tempurung kelapa dengan asam klorida dan asam fosfat untuk penyaringan air keruh yaitu air tanah. Dalam penelitian ini, arang tempurung kelapa hasil pirolisis di gerus hingga mencapai ukuran granul mikrometer kemudian dibersihkan dalam larutan alkohol 96% dan dipanaskan diatas hot plate selama 30 menit pada suhu ruang. Proses aktivasi arang tempurung kelapa dilakukan dengan merendam arang tempurung kelapa dalam asam klorida dan asam fosfat selama 24 jam. Kemudian campuran tersebut disaring dan dicuci dengan aquades lalu dikeringkan dalam oven dengan variasi temperatur 100 0C dan 150 0C selama 2 jam, setelah itu didinginkan dalam desikator. Semakin tinggi temperatur pengeringan maka semakin sedikit kadar air yang terkandung dalam arang aktif sehingga dapat menghasilkan pori yang semakin besar maka arang aktif yang dihasilkan akan semakin baik. Arang aktif yang mempunyai karakteristik terbaik adalah arang tempurung kelapa yang diaktivasi dengan asam fosfat dengan kadar air 5.699% pada temperatur 1000C dan 5.322% pada temperatur 1500C. Keywords: activated carbon, coconut shell charcoal, sulfuric acid, phosphoric acid.
STUDI SIMULASI KURVA HISTERESIS BAHAN FERROELEKTRIK BERBASIS TEORI DINDING DOMAIN MENGGUNAKAN MODEL LANGEVIN DAN ISING SPIN Hamid, D. Triyono
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
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 paper addresses the modeling of hysteresis in ferroelectric materials through consideration of domain wall theory. The model is developed in two steps. In the first step, anhysteresis relation of Langevin and Ising spin is obtained with dipol interaction. In the second step, hysteresis is incorporated through consideration of domain wall theory. Curve model is validated through curve experiment PMN-PT-BT [ Pb(Mg,Nb)O3-PbTiO3-BaTiO3 ] material. Pearson coefficient for curve model is more than 0.99. So curve model is valid. Curve hysteresis ferroelectric studies of PZT4, PZT5A, PZT5H, PMNT [ Pb(Mg,Nb)TiO3 ] single crystal, BZT [ Ba(Zr,Ti)O3)], BT-BZ (BaTiO3-BaZrO3) thin film and PZT [ Pb(Zr,Ti)O3 ] thin film materials yields Pearson coefficient more than 0.97 for Langevin and Ising spin model. It shows that Langevin or Ising spin model is good for studying hysteresis curve of ferroelectric materials. PZ26 (PbZrO3) material is not appropriate with model based on domain wall theory, because of asymetri curve. Keywords : ferroelectric, domain wall of ferroelectric, hysteresis of ferroelectric, Langevin model, Ising spin model.
PENGARUH TEMPERATURE TERHADAP PERFORMA DIRECT ETHANOL FUEL CELL (DEFC) Annisa Yusliha; Eniya Dewi Listiani; Agus Setyo Budi
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Telah dilakukan pengujian ethanol dengan konsentrasi 1% dan 3%. Ethanol yang digunakan dalam pengujian ini adalah ethanol komersial atau ethanol yang dijual di pasaran. Pengujian ini dilakukan dengan berbagai suhu yang berbeda ( 300 , 400 , 500 , 600). Dalam pengujian ini digunakan stack fuel cell yang terdiri dari MEA , 2 end plate dan gasket. Stack fuel cell ini akan dialiri ethanol yang dipanaskan dengan suhu yang telah disesuaikan , dan diberi tekanan sebesar 100 ml/s. Keyword : Ethanol , DEFC , MEA , Fuel Cell.
PROSES PHOTOLITHOGRAPHY DALAM FABRIKASI DIVAIS SEMIKONDUKTOR Slamet Widodo; Nanang Sudrajad
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Photolithography merupakan tahapan proses dasar (basic) untuk pembuatan divais semikonduktor dengan teknologi mikroelektronika. Proses photolithography adalah proses pemindahan pola bentuk geometris pada masker ke lapisan tipis (beberapa mikron) dan bahan yang peka terhadap radiasi (photoresist). Pertama, photoresist biasanya dilapiskan dengan cara spin coating atau spray coating untuk melapisi permukaan wafer silikon. Kedua, didalam lithography sinar (radiasi) ultra violet (U.V.) digunakan untuk mengubah kelarutan photoresist ke dalam suatu pelarut. Photoresist positip menjadi lebih larut pada penyinaran dengan sinar u.v., sedangkan photoresist negatip menjadi lebih larut, setelah photoresist ini mengalami proses polimerisasi. Pembuatan divais semikonduktor dan rangkaian terintegrasi (IC) terdiri dari bermacam-macam lapisan melalui photolithography (pelindunglmasker) dengan tahapan proses seperti daerah oksidasi, difusi, gate, lubang kontak. atau metalisasi dengan setiap tahap memerlukan pelindung (masker). Tahap pelindung ini menentukan daerah dimana tahap proses berikutnya akan ditentukan. Jumlah semua tahapan proses itu akan menghasilkan divais dan rangkaian dengan sifat listrik yang spesifik. Kata Kunci : Photolithography, photoresist positif dan negatif, divais semikonduktor.
INVESTIGATION OF ELECTRODEPOSITED Ni-TiAlN COMPOSITE FILM Esmar Budi; Iwan Sugihartono; Agus Setyo Budi; Setia Budi; Alief Restu; Adhyatma Alamsyah; Ade Lina Permata; Muarief Muarief
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Electrodeposition of Ni-based composite films on metal is subjected to improve its wear and corrosion resistances. Hard nitride compound particles commonly are added into Ni matrix to enhance the composite film properties. The compound has excelent properties especally in mechanical and corrosion resistances. Electrodeposited Ni-TiAlN composite film on tungsten carbide rod as substrate has been investigated. Amount of 2 gr/liter of TiN and AlN powders were added into the electrolyte solution that consists of 0.38 M Ni2SO4.6H2O, 0.17 M NiCl2.6H2O and 0.49 M H3BO3. The experiment was performed at electrodeposition current of 3.5 and 40 mA for about 10 minutes. The results show that the composite film morphology is refined as increasing of electrodeposition current. Keywords: Ni-TiAlN composite film, electrodeposition, tungsten carbide, electrolyte solution.
TEKNOLOGI MICRO ELECTRO MECHANICAL SYSTEMS Slamet Widodo; Tony Kristiantoro
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
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 described the technology Microelectromechanical systems (MEMS) was applied in several fields including biology, chemistry, physics, telecommunications, electronics, medical, defense and so forth. A microelectromechanical system (MEMS) is one of the components (devices) are relatively small (micro scale) consists of components (devices) micromechanical (like microgears, microlevers, etc.), which moves both in response to certain stimuli (sensors) or the initiative to perform certain tasks (actuators), and microelectronic components to obtain information from, or control, or motion. In a broader sense, associated with MEMS technology, including materials and processes required to make MEMS components, integration components to create MEMS devices (sensors, actuators, etc.) and applications that use the devices (device) MEMS. In addition, other microsystems such as microchemical reactors, microthermal systems and smart materials (such as shape memory alloy) are also sometimes included in "MEMS Technology" based on its utility in sensors or actuators or as a source of power, heat sink, etc. In civil and commercial applications, MEMS offer advantages in various fields such as automotive control and safety systems, communications, satellite control, medical equipment and health monitoring, however, non-MEMS devices are often already exists for this application. If development is a useful alternative to MEMS, MEMS devices either have to fill capability gaps, ie, whether it should perform new functions, perform the function better than can currently be done or cheaper, lighter or smaller than the current available devices. For commercial applications, it also must be economical, ie, there must be sufficient demand for new devices that will be profitable. Keywords: MEMS, applications, devices, sensors, actuators.
SINTESIS DAN KARAKTERISASI SIFAT FISIKA TONER BERBASIS PASIR BESI DENGAN METODE POLIMERISASI EMULSI Siti Zulaikah; Nandang Mufti; Abdulloh Fuad; Firriy Melati Sukma
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 3 (2014): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2014
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Toner berbasis pasir besi dengan kandungan mineral dominan magnetite berhasil disintesis dengan metode polimerisasi emulsi. Bahan baku toner tersebut terdiri dari karbon, polimer yang terbuat dari stereofoam, magnetite (Fe3O4) yang diekstrak dari pasir besi dan dikecilkan ukuran bulirnya dengan metode kopretisipasi. Dari hasil uji SEM diperoleh ukuran bulir rata-rata 6,007 mikron. Ukuran tersebut relatif kecil bila dibandingkan dengan ukuran bulir rata-rata toner pasaran yaitu sebesra 10 mikron. Struktur XRD dari toner yang dihasilkan menunjukkan kesamaan dengan toner pasaran, Sementara itu suseptibilitas magnetik dari toner tersebut memiliki nilai yang berada pada rentang 200 ï‚´ 10-8 hingga 900ï‚´ 10-8 m3/kg. Harga suseptibilitas magnetik menurun seiring dengan penurunan ukuran bulir atau waktu milling. Sifat kelistrikan dari toner tersebut yang dalam penelitian ini terukur dari dielektrisitas dan resistivitas, menunjukkan rentang nilai dari 7 hingga 21 Hz untuk dielektrisitas dan 18.500 hingga 34.000 ohm cm untuk resistivitas. Nilai konstanta dielektrik dan resistivitas cenderung meningkat seiring dengan menurunnya ukuran bulir toner. Kata Kunci: Sintesis Toner, Pasir Besi, Suseptibilitas Magnetik, Dielektrisitas, Resistivitas, Polimerisasi Emuls.

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