Krisman Krisman, Krisman
Jurusan Fisika, FMIPA Universitas Riau Pekanbaru

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KARAKTERISASI BAHAN FERROELEKTRIK BARIUM STRONTIUM TITANAT (Ba0.3Sr0.7TiO3) DENGAN MENGGUNAKAN DIFRAKSI SINAR-X (XRD)

SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

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Abstract

Material ferroelektrik Barium Strontium Titanat dengan komposisi Ba0,3Sr0,7TiO3 telah berhasil dideposit menggunakan metode kimia padatan. Sampel dicetak dalam bentuk pelet dan kemudian diannealing pada temperatur 600oC, 700oC dan 800oC. Karakterisasi pada sampel dilakukan menggunakan XRD. Hasil karakterisasi XRD dari sampel memperoleh data dan diolah dalam bentuk grafik hubungan antara intensitas terhadap sudut 2 theta. Pola difraksi XRD Ba0,3Sr0,7TiO3 diketahui memiliki beberapa puncak. Material Ba0,3Sr0,7TiO3 ini berbentuk kristalin dengan struktur kubus, dengan besar parameter kisi rata-rata adalah 3.961 Å. Ukuran partikel (D) dan regangan kisi (η) dari material Ba0,3Sr0,7TiO3 yang dieanealing pada suhu 600°C, 700°C dan 800°C selama 1 jam yaitu masing - masing sebesar 42,60 nm, 44,43 nm, 46,89 nm dan -4,49x 10-3, -4,05 x 10-3, -2,96 x 10-3. Semakin besar ukuran partikel, rata-rata regangan kisi (η) semakin besar seiring dengan meningkat suhu annealing. Kata Kunci: Karakterisasi XRD, anealling, ukuran partikel, regangan kisi

FABRIKASI DAN KARAKTERISASI SIFAT OPTIK DARI Ba1-xSrxTiO3 MENGGUNAKAN SPEKTROFOTOMETER ULTRAVIOLET VISIBLE

SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

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Pembuatan Ba1-xSrxTiO3(BST) dengan komposisi x=0,1 0,2 dan 0,3 dengan suhu yang berbeda-beda masing-masing 550, 600 dan 650ºC pada substrat kaca dengan metode Sol-gel telah berhasil dilakukan. Tujuan yang akan dicapai dalam penelitian ini adalah untuk mendapatkan nilai absorbansi dan transmitansi bahan BST dengan komposisi dan suhu yang berbeda. Karakterisasi dilakukan menggunakan spektrofotometer Ultraviolet-Visible. Untuk komposisi x=0,1 nilai absorbansi maksimumnya pada suhu 550, 600 dan 650ºC masing-masing adalah 0,108a.u, 0,132a.u, dan 0,076a.u, untuk komposisi x=0,2 nilai absorbansi maksimumnya 0,147a.u, 0,174a.u, 0,077a.u, dan untuk komposisi x=0,3 nilai absorbansi maksimumnya 0,316a.u, 0,195a.u, 0,105a.u. Nilai transmitansi maksimum untuk x=0,1 pada suhu 550, 600 dan 6500C masing-masing adalah 97,9%, 97,7%, dan 96,6% dan untuk x=0,2 nilai masing-masing transmitansinya adalah 90,7%, 98,1%, 94,8% sedangkan untuk komposisi x=0,3 masing-masing nilai transmitansinya adalah 88,5%, 80,3%, dan 93,7%. Hasil tersebut menunjukkan bahwa perbedaan suhu mempengaruhi absorbansi yang didapat dan semakin besar komposisi Srontium (Sr) yang digunakan maka semakin besar absorbansi yang dihasilkan dan untuk nilai transmitansi berbanding terbalik dengan nilai absorbansi. Kata Kunci: Barium Strontium Titanat, Absorbansi, Transmitansi, Annealing, Sol-Gel, Spektroskopi Ultraviolet-Visible(UV-Vis).

PEMBUATAN FILM TIPIS BARIUM STRONTIUM TITANAT (Ba0,6Sr0,4TiO3) MENGGUNAKAN METODE SOL-GEL DAN KARAKTERISASI MENGGUNAKAN SPEKTROSKOPI IMPEDANSI

Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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Abstract

Fabrication of thin film from material barium strontium titanat (Ba0,6Sr 0,4TiO3) that is annealingat a temperature of 6000C and 650°C has been carried out. Samples are made by using the solgelmethod, then characterized by using Field Emission Scanning Microscopy (FESEM) andImpedance Spectroscopy. Results of FESEM for samples at temperature 6000C and 650°C havethickness of 102,7 nm and 245,7 nm. The impedance spectroscopy characterization usesfrequency at 100 Hz up to 1 MHz to get real impedance value and imaginer value fordetermining complex impedance, complex capacitance, dielectric constant. The compleximpedance values for both temperature 600°C and 650°C is 2061,4 Ω dan 4684,3 Ω. Thecomplex capacitance values for both temperature of 6000C and 650°C are 7,72x10-7 Farad and3,4x10-7 Farad. The value of the relative dielectric constant at temperature of 6000C and 650°Care 52,9 and 55,6 respectively.

PENENTUAN TINGKAT KEMAGNETAN DAN INDUKSI MAGNETIK TOTAL ENDAPAN PASIR LAUT PANTAI PADANG SEBAGAI FUNGSI KEDALAMAN

Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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We report the determination of the stage of magnetism and magnetic induction iron sand deposits as afunction of depth in Padang, West Sumatra coast. Samples of the iron sand deposits are dried first,then the separation concentrate iron sand with sand using iron sand separator apparatus to identify theelement countain of sampels then it was used XRF ( X- Ray Fluerensence). The study resultsexpressed that grades stage magnetism iron sand deposits increases or increases as a function ofdepth, where the value of stage magnetism obtained by the ratio between the mass of the sample massconcentratet. The value of magnetic induction total measured using a magnetic sensor Pasco PS-2162through a solenoid made of 2500 loops with a length of 8 cm and a diameter of 2,5 cm wereelectrified by the variation of a current of 2 A to 10 A and a horizontal distance of 1 to 5 mm alongthe axis solenoid. When an electric current is increased, the greater the total magnetic induction, andthe total value of magnetic induction decreases as a function of the horizontal distance.

KARAKTERISASI DAN PEMBUATAN KAPASITOR Ba0,3Sr0,7TiO3MENGGUNAKAN METODE SOL-GEL

Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

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A thin film of material Barium Strontium Titanate (BST) with compositions of Ba0.3Sr0.7TiO3made using sol-gel method and annealing at temperatures 600°C and 650°C to obtaincrystalline structure. The thin film of BST was characterized by using Field EmissionScanning Electron Microscopy (FESEM) and impedance spectroscopy. The resultsofcharacterization using FESEM obtained the thickness of thin film Ba0.3Sr0.7TiO3at atemperature 600oC and650oC are 69.22 nm dan 73.69 nm. The value mass composition ofBa:Sr:Ti obtained from the characterization EDX at temperatures 600°C is 0.3:1.7:3.8 and attemperatures 650oCis 0.1:0.3:0.8. The result of impedance spectroscopy obtained afrequency, real impedance (Z’) and imaginer impedance (Z”). The result of impedance alsoobtained information that the greater frequency, the smaller complex capacitance anddielectric constant and vice versa. In general the greater annealing temperature, complexcapacitance and the dielectric constant will be greater too. At the frequence 100 Hz withtemperature 600oCand 650oC, the capacitance value are 1.457x10-5F, 1.476x10-5 F. At thefrequence 100 Hz with temperature 600oCand 650oC, the dielectric constant value are 670dan 723.

KAJIAN SPEKTROSKOPI TERAHERTZ JARINGAN TUMOR DENGAN PENDEKATAN KOMPUTASI BIOFISIK

Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

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A study of terahertz apsorption spectroscopy has been done in the study of wave fatterns andabsorption spectra through biological tissue with a biophysical computational approach. Thedetermination of thr patterns of terahertz radiation waves and spectra of terahertz radiationabsorbtion into tissues of assessed theoretically by computational medhods. Determination ofphysical parameters of radiation absorbtion spectroscopy as well as fourier-assistedtransformation of mathematical software aplication 9. This section is called terahertzradiation absorption spectroscopy of cow tissue. From the result of computation or modelobtained amplitude spectrum of tissue absorbtion of normal 15 a.u tumors and cancer 12.5 a.ushow the difference. Terahertz radiation wave pattern dating the cow’s tissue medium,indicating that there are part are reflected and absorbed and scattered. However, in this studyonly emphasizes the part of absorbtion which then becomes a transmitted part. This result isalso compared with the result of previuosresearch as a validation resulted in 0.8% error.Differences in wave fatterns and absorption spectra between normal tissue and tumor orcancer are caused by the ingredients of the components containing the water making up thetumor or cancer more viscous than the normal tissue.

APPLICATION OF SULFONATED POLYSTYRENE IN POLYMER ELECTROLYTE FUEL CELL

Jurnal Sains Materi Indonesia Vol 20, No 1: OKTOBER 2018
Publisher : Center for Science & Technology of Advanced Material - National Nuclear Energy Agency

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APPLICATION OF SULFONATED POLYSTYRENE IN POLYMER ELECTROLYTE FUEL CELL. Sulfonated polystyrene (SPS) is polyelectrolyte solid that widely used in many aplications. In this works SPS is applied for some parts of polymer electrolyte fuel cell membrane due sulfonate group available in the structure. The investigation involve the application for membrane with addition of small molecules, i.e. benzimidazole and evaluating its microstructure and performance. Application of SPS solution as binding agent in MEA will also be presented.  The results show that when using SPS as fuel cell membrane, the additon of small molecules such as benzimidazole would modify its microstrusture as well as improve its ion conductivity. Meanwhile, some improvement still required for application of SPS solution as binding agent for preparation of Membrane Electrode Assembly or MEA.

KARAKTERISASI KAPASITOR BARIUM STRONTIUM TITANAT (BST) Ba0,75 Sr0,25 TiO3 , YANG DIBUAT MENGGUNAKAN METODE SOL-GEL

Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

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The thin film of Barium Strontium Titanate (BST) has been studied withcomposition ofby using sol-gel method that annealed in temperature of 600oC and 650oC. The thin film of BST is characterized by using Field Emission Scanning Electron Microscopy (FESEM) and an impedance spectroscopy. The results of  FESEM characterization for samples in temperature of 600oC and 650oC are 55.83 nm and 84.88 nm in thickness respectively. The result of impedance spectroscopy characterization given frequency values obtained by the impedance value of real and imaginary.The capacitance value at a frequency of 20 Hz from a thin film of BST in temperature of 600oC and 650oC are 69.36Fand138.70F. The dielectric constant of the thin film of BST in temperature of 600oC and 650oC are 22.17 dan 131.56 respectively.

ANALISA INTERPRETASI POLA ALIRAN AIR BAWAH TANAH KELURAHAN LABUH BARU BARAT KECAMATAN PAYUNG SEKAKI PEKANBARU MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER

Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

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Underground water is one of the important component sources for human being. Study on interpretation of underground water flow has been carried out using Geoelectric Schlumberger Electrode Configuration in Labuh Baru Barat Village, Payung Sekaki District, Pekanbaru. The range measurement was chosen to be 240 meter. The output of measurement  arecurrent and voltage. The data, then was inputed into software progress and surfer 11. The output of this computer program is a map of underground waterflow  pettern and underground lithology. The results of mapping of the pattern of underground water flow indicate that the direction of water flow from North to South direction, or from Pinang street to Payung Sekaki street. The thickness of the layer start  from the first layer that is 4.05 meters and 5.4 meters is a layer of silt- clay, the second layer is 13.07 meters and 14.3 meters is a layer of mud stone, the third layer is 13.07 meters and 15.2 meters is a layer of sand and alluvial and the fourth layer is 51.1 meters and 79.2 meters is layer of gravel sand.