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Jurnal Aplikasi Fisika
Published by Universitas Halu Oleo
ISSN : -     EISSN : -     DOI : -
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Jurnal Aplikasi Fisika (JAF) terbit pertama kali pada bulan Agustus 2005, diterbitkan dengan frekuensi 2 kali setahun namun karna banyaknya paper yang akan dipublish terutama dari mahasiswa Fisika baik S1 maupun S2 yang telah menyelesaikan tugas akhir mulai Tahun 2017 jurnal ini terbit 3 kali dalam setahun (Edisi Pebruari, Juni, dan Oktober) .
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Articles 8 Documents
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Search results for , issue "Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA" : 8 Documents clear
KAJIAN PENGARUH VARIASI JUMLAH LAPISAN TRANSPARAN TiO2 TERHADAP PERFORMA KERJA SEL SURYA YANG DISENSITISASI DENGAN DYE (DSSC) Ida Usman; Purwo Adi Setyo; Waode Sukmawati Arsyad
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

A study of the effect of variations on the number of transparent TiO2 layers on dye-sensitized dye (DSSC) solar cell performance has been conducted. This study aims to make DSSC solar cell with transparent amount of transparent TiO2 transparent layer and characterize its working function by measuring the photovoltaic characteristics. From the results of the research, the Jsc value obtained increases with the increase in the number of layers for the case of cells A and B cells, this is probably related to the increasing number of dye that binds to TiO2 with increasing cell thickness, thus increasing the amount of light absorbed by dye . However, when the thickness of the TiO2 layer is added (cells C and D) the Jsc value actually decreases. A DSSC A cell with a layer of transparent TiO2 layer of 1 layer shows the largest open circuit voltage value of 0.7V, while DSSC B cells show the highest current density value of 2.07mA / cm2, and the highest fill factor (FF) is indicated by Sample D. The results of this study there are many factors that limit the effesiensi DSSC solar cellsKeywords: DSSC, TiO2 Transparent, Number of Layers, Performance
PENGARUH TEKANAN DAN UKURAN PARTIKEL TERHADAP KUALITAS BRIKET ARANG CANGKANG COKLAT Lina Lestari; Erzam S. Hasan; Risna Risna
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

The purpose of this research is to know the pressurized and particle size influence on Cacao’s shell charcoal briquette making. It is made from cacao as an adhesive with the ratio of 9:1. The used particle sizes are 60 mesh, 70 mesh, 80 mesh, and 100 mesh. Sample is formed in molded cylinder with the diameter of 4 cm with the centered hole of 0,8 cm and the compacted pressure is 34,66 kg/cm2, 69,32 kg/cm2, 103,98 kg/cm2. It’s test is density, water level, activation time, flame velocity, the highest temperature, the time needed for the highest temperature, and the shifting of burning temperature. The result shows that the best briquette quality is the one with particle size 80 mesh and it’s highest temperature is 464,4oC on compacted 103,98 kg/cm2. The difference of each briquette particle size shows the tendency of increasing on it’s activation time and it’s flame velocity.Keywords : Briquette, cacao shell, pressure, particle size.
PENGOLAHAN AIR SUMUR GALI DENGAN METODE AERASI-FILTRASI MENGGUNAKAN AERATOR GELEMBUNG DAN SARINGAN PASIR CEPAT UNTUK MENURUNKAN KADAR BESI (Fe) DAN MANGAN (Mn) La Aba; Bahrin Bahrin; Armid A
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

A research on well water treatment has been done by aeration-filtration method using bubble aerator and quick sand filter to decrease iron (Fe) and manganese (Mn) concentration. The aim of this research is to know the decrease of Fe and Mn content in dug well water after processing using bubble aerator and fast sand filter with 15, 30 and 45 minute contact variations. Measurements of Fe and Mn concentrations were performed with the Ultraviolet-Visible (UV-Vis) spectrophotometric instrument. The initial concentration of Fe in well water before treatment was 3.8 mg / L and manganese (Mn) was 5.07 mg / L. After aeration of 15, 30 and 45 minutes, the Fe concentration decreased to 3.20; 1.38 and 1.23 mg / L with the effectiveness of each treatment of 15.78; 63.68 and 67.63%, while Mn concentration was found to be 3.3; 2,1 and 1,7 mg / L with effectiveness of processing 34,91; 58.57 and 66.46% respectively. Further aeration-filtration well treatment at contact time 15, 30 and 45 minutes yields a final Fe concentration of 0.89; 0.62 and 0.28 mg / L with the processing effectiveness of 76.57 each; 83.68 and 92.63%, and final concentration of Mn of 4.4; 3,1 and 1,5 mg / L with processing effectiveness 13,21; 38.85 and 70.41%. Thus, the results obtained through aeration-filtration treatment on Fe and Mn levels only resulted in an effective decrease in Fe (92.63%) after 45 minutes. Keywords: Dug well, Aerasi-filtration, Aerator bubble, Iron content (Fe), Manganese content (Mn)
PENGARUH LAMA WAKTU ULTRASONIKASI TERHADAP KONDUKTIVITAS LISTRIK GRAPHENE La Agusu; Yuliana Yuliana; Yustin Biringgalo; Risal Day; Herdianto Herdianto
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

Research on the effect of ultrasound time on graphene electrical conductivity has been conducted. The purpose of this research is to analyze the best ultrasonication time to synthesize graphene material with high electrical conductivity value. Graphene is synthesized by a graphite oxide reduction method. Graphite is oxidized to form graphite oxide by modifying the Hummer method. Graphite oxide was diultrasonikasi with variation of time 60, 90, 120, 150, and 180 minutes with frequency 53KHz. Then the graphite oxide reduction process was chemically done with the addition of Zn 1,6 gram powder and hydrothermal technique using microwave resistance of 70% for 30 minutes. Analysis of the graphene oxide structure was done by XRD testing and electrical testing of graphene oxide using four probes (FPP). The test results show that graphene with 180 minutes of ultrasonication time has the best electrical conductivity of 0.6512 S / cm.   Keywords: Graphite, ultrasonication, electrical conductivity, graphene oxide.
Efek Microwave pada Proses Deasetilasi Kitin dari Limbah Cangkang Udang Zaeni, Muhammad; Fuadah, Badrotul; Sudiana, I. N.
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Jurusan Fisika FMIPA UHO

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Abstract

A research about “Microwave Effect on the Chitin Deacetylation Process of Shrimp-Shell Waste (Panaeus merguensis) “ is done. This research aims to decrease the reaction time of acetyl group determination and to get glucosamine hydrochloride that fit the standard. In this research, NaOH 50% is used, while the radiation duration is varied. Microwave radion durations are under 30 minute i.e. 3,7,11,15 minutes with 450 watt power to examine the effectivity of microwave technology compared to conventional method. FTIR  (Fourier Transform Infrared)  test results show that the highest Deacetylation Degree (DD) of chitosan 62,72%, is reached at 15 minutes of microwave radiation duration, that equivalent with deacetylased chitosan by conventional method that is 61,78%. Chitosan then undergoes the making process of glucosamine hydrochloride by using HCl 37%. The characterization result show that glucosamine hydrochloride has a good solubility in water, melting point of 190ºC, FTIR spectrum of glucosamine hydrochloride shows  absorption bands that fit the standard glucosamine hydrochloride and XRD test result show that theb synthesized crystal still has a low crystalinity. Keyword: microwave, chitin, chitosan, deacetylation degree, glucosamine hydrochloride.
OPTIMASI PARAMETER POTENSIAL NUKLIR BAGI REAKSI FUSI ANTAR INTI-INTI BERAT Viska Inda Variani; Vivin Fitrya Ningsih; Muhammad Zamrun Firihu
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

Research and manufacture of optimum nuclear potential parameter optimization program for fusion reactions between heavy cores has been successfully made using Wong formula approach which is supported by Borland Delphi 7.0 visual programming language. The study was conducted specifically on the 16O+70,72,74,76Ge system by varying the value of the diversity parameter (a) and setting the depth parameter value (V0) and the radius (r0) parameter of six data. The three parameters must be set so as to produce the same VB value with the reference VB value. The resulting cross-sectional value of each input data has a different level of accuracy for the energy above VB. The results of cross-sectional calculations are then compared with the experimental results data. The Chi Square values of each cross-sectional data are interpolated with the input value a to produce a parabolic graph. The minimum peak of the graph represents an optimum value with the lowest Chi Square that can be used to determine the cross-sectional value of the fusion reaction closest to the experimental data. Keywords: nuclear fusion reaction, Wong formula, cross-reaction, heavy core, Chi Square, interpolation. 
POROSITAS MIKROSTRUKTUR SILIKA KERAMIK HASIL EKSTRAKSI DARI LIMBAH SEKAM PADI YANG DISINTERING DENGAN MICROWAVE Endang S, Prima; Trisnawati, Trisnawati; Sudiana, I. N.
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Jurusan Fisika FMIPA UHO

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Abstract

An experiments have been conducted on the characterization of ceramic silica microstructures extracted from rice husks. The aim of this research is to observe the change of ceramic silica microstructure extracted from rice husk ash after sintered by using microwave. Rice husk ash first extracted using HCl 1M and NaOH 2M, then drying and molding. Ceramic silica is sintered by using microwave and electric furnace at temperature range 1000˚C-1600˚C. Characterization of ceramic silica using scanning electron microscope (SEM). The results of scanning electron microscope (SEM) show that in the sintering process using microwave the surface of silica ceramic sample is form solid granulars and  pores rapidly reduced. While the results of scanning electron microscope (SEM) using the furnace along with rising temperature, showing microstructure ceramic silica samples at each temperature is almost the same but slower pore reduction. Keywords: rice husk, extraction, sintering, microwave, imageJ software, microstructure. 
EFEK MICROWAVE PADA PADUAN SILIKA (SiO2) DARI SEKAM PADI DAN ALPHA ALUMINA (-Al2O3) I Nyoman Sudiana; Muhammad Zamrun Firihu; La Aba; Lina Lestari; Prima Endang Susilowati
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Universitas Halu Oleo

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Abstract

Research on the effects of microwave on the composite of silica (SiO2) from rice husk and alpha alumina (α-Al2O3) had been conducted. This study aims to determine the effect of microwave on the density and pore volume percent of silica alumina ceramic. Alpha alumina powder silica powder was mixed with a variation of 75%:25%, 85%:15% and 95%:5%, then added  with PVA as gluten as much as 3% wt. Each sample was compacted with a pressure of 4 tons and sintering with temperature variations of 900, 1000 and 1100 oC. The results of characterization using microwave sintering was better than using a sintering furnace. Shown by the increase in density and decrease in percent pore volume faster in the microwave was at a ratio of 85%:15% and temperatures 1100oC microwave sintering has the density of 3.241 g /cm3 and a percent pore volume of 9.892% while the sintering furnace has a density value of 3.013 g /cm3 and the pore volume and percent of 16.238%. Keywords : microwave sintering, alumina, silica, density, pore.

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