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All Journal Jurnal Matematika & Sains Journal of Aceh Physics Society JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Natural Cakradonya Dental Journal Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education)
Mursal Mursal
Department Of Physics, Universitas Syiah Kuala, Banda Aceh
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Dentistry Earth & Planetary Sciences Education Energy Immunology & microbiology Mathematics Neuroscience Physics Public Health

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Optimasi Parameter Tekanan Deposisi pada Penumbuhan Lapisan Tipis Polykristal Silikon dengan Metode Hot Wire Cell PECVD Amiruddin Supu; Ida Usman; Mursal Mursal; Toto Winata; Sukirno Sukirno
Jurnal Matematika & Sains Vol 10, No 1 (2005)
Publisher : Institut Teknologi Bandung

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Abstract

The Hot wire Cell PECVD method has been developed to grow the poly-Si thin films. The poly-Si thin films were grown on the 7059 corning glass at a filament temperature of 1800 oC. Silane (SiH4) gas 10% diluted in hydrogen (H2) gas was used as gas source. In the hot wire cell PECVD method, reactant gases were decomposed as a result of reaction with a heated filament placed above the substrate and paralel to the gas inlet. The characterization results exhibited that the poly-Si thin films could be grown at the pressure of 200 to 500 mTorr with a substrate temperature of 275 oC. The analysis of XRD result showed that preferential intensity was obtained at the crystal orientation of . The highest values of peak intensity (111 cps), grains size (minor axis 0.5 µm) and dark conductivity (0.60x10-5 Scm-1) were obtained at the deposition pressure of 300 mTorr with deposition rate of 2.2 nm/s.
Analisis Sifat-sifat Optoelektronik Lapisan Tipis Silikon Amorf terhidrogenasi yang ditumbuhkan dengan Teknik VHF-PECVD pada Variasi Daya RF Ida Usman; Amiruddin Supu; Mursal Mursal; Sukirno Sukirno; Toto Winata; Mohamad Barmawi
Jurnal Matematika & Sains Vol 10, No 2 (2005)
Publisher : Institut Teknologi Bandung

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The hydrogenated amorphous silicon (a-Si:H) thin films have been deposited using VHF-PECVD technique. The deposition process was done by varied the rf power from 6 to 12.5 watts with 300 mTorr of chamber pressure and from 20 to 70 watts with 100 mTorr of chamber pressure. The highest deposition rate of 2.99 Å/sec and the highest photoconductivity of 1.13 x 10-4 S/cm were obtained from 8 watts of rf power when the rf power was varied from 6 to 12.5 watts. Then, the highest deposition rate of 9.57 Å/sec was obtained from 40 watts of rf power and the highest photoconductivity of 1.54 x 10-2 S/cm was obtained from 20 watts of rf power when the rf power was varied from 20 to 70 watts. Based on the analysis of characterization results, the degradation of a-Si:H film conductivity was caused by the formation of defect states such as band-tail defect and bandgap defect.
Pengaruh Daya RF terhadap Kandungan Ge dan Sifat Opto-Elektronik Lapisan Tipis a-SiGe:H Mursal Mursal; Amiruddin Supu; Ida Usman; Toto Winata; Sukirno Sukirno
Jurnal Matematika & Sains Vol 10, No 4 (2005)
Publisher : Institut Teknologi Bandung

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The effect of rf power on Ge content (CGe) and opto-electronic properties of a-SiGe:H thin films deposited by PECVD method had been investigated. a-SiGe:H thin films were grown on corning glass 7059 substrate from a gas mixture of SiH4 and GeH4 10% diluted in H2, respectively. The substrate temperature was kept at 275oC and the rf power was varied from 50 - 120 Watt. The results showed that the CGe of a-SiGe:H thin films decreases with increasing in rf power, and therefore the optical bandgap (Eopt) increases. We found that the optimum rf power was 90 Watt, which corresponds to the highest photo-sensitivity of 1.43 x 104.
Optimization of Deposition Parameters for high Quality a-SiGe:H Thin Films Mursal Mursal; Ida Usman; Toto Winata; Sukirno Sukirno; Mohamad Barmawi
Jurnal Matematika & Sains Vol 11, No 2 (2006)
Publisher : Institut Teknologi Bandung

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The effect of substrate temperature and rf power on the characteristics of a-SiGe:H alloys thin films has been investigated. The a-SiGe:H films made from a mixture of 10% silane (SiH4) and 10% germane (GeH4) gas diluted in hydrogen (H2) were grown on corning glass 7059 by using Plasma Enhanced Chemical Vapor Deposition (PECVD) method. The results showed that the deposition rate of a-SiGe:H films increased with the increasing of substrate temperature and rf power. The optical band gap (Eopt) of the films was improved by increasing of the rf power. The dependency of Eopt on the rf power is attributed to the change in Ge content in the films. The photosensitivity (σph/σd) of the films deposited at 200 °C and 175 °C slightly increased with increasing of rf power from 30-50 Watt. For the films deposited at 225 °C, the photosensitivity increased with increasing of rf power from 30-40 Watt, and relatively constant at rf power of 40-60 Watt.
Dampak Problem Based Learning terhadap Pemahaman Konsep Ditinjau dari Gaya Berpikir Siswa pada Mata Pelajaran Fisika A. Halim; Suriana Suriana; Mursal Mursal
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 3 No 1 (2017): JPPPF - Jurnal Penelitian & Pengembangan Pendidikan Fisika, Volume 3 Nomor 1, Jun
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.471 KB) | DOI: 10.21009/1.03101

Abstract

Abstract This study aims to determine students's increased understanding of the concept in terms of thinking style after the implementation of the model-based PBL experiments on matter and energy. This study uses quasi-experimental methods, the shape of nonequivalent control group design involving two study groups namely experimental and control classes were held in MAN Rukoh Banda Aceh class XI the first semester of academic year 2015/2016 consisting of 24 students experiment class and 25 students control class. Data collection instruments; 1) Tests to see increased understanding of the concept; 2) Test thinking style questionnaire to determine the type of thinking style the students to absorb information. The results showed that: 1) There is an increased understanding the concept of students with the application of model PBL learning based experiment than higher conventional learning seen from N-Gain both classes, reaching 71% higher category for experimental class and 32% for control class. 2) On this kind of thinking style random abstract experimental class is better than the control class. On this kind of thinking style concrete sequential increase understanding concept of experimental class is better than the control class. On this kind of thinking style abstract sequential increase understanding of the concept experimental class is better than the control class. On this kind of thinking style concrete random improved understanding concept of control class reached (4.00) while the experimental group (0.00) for the experimental class did not have a concrete random thinking styles. Keywords: Model PBL Based Experiment, Concept Undertanding, Thinking Style. Abstrak Terdapat empat jenis gaya berpikir siswa yang digunakan dalam penelitian, yaitu Sekuensial Konkret (SK), Sekuensial Abstrak (SA), Acak Konkret (AK), dan Acak Abstrak (AA). Berdasarkan empat jenis gaya berpikir tersebut, jenis gaya berpikir yang paling tinggi terjadi peningkatan pemahaman konsep fisika dan indikator pemahaman manakah paling tinggi peningkatannya. Inilah tujuan yang ingin diketahui dari hasil penelitian yang dilakukan pada 24 siswa MAN Rukoh Banda Aceh kelas XI sebanyak 24 siswa untuk kelas eksperimen dan 25 siswa kelas kontrol setelah dilakukan perlakuan dengan model PBL berbasis eksperimen. Penelitian ini menggunakan metode quasi experimental, dengan desain nonequivalent control group design dan pengumpulan data menggunakan; tes untuk melihat peningkatan pemahaman konsep; dan angket untuk melihat jenis gaya berpikir yang dimiliki siswa. Hasil penelitian menunjukkan bahwa indikator pemahaman konsep “Translasi” terjadi peningkatan tertinggi pada siswa yang memiliki jenis gaya berpikir “Sekuensial Konkret (SK)” pada kelompok eksperimen, sebaliknya untuk siswa yang memiliki jenis gaya berpikir “Sekuensial Abstrak (SA)” indikator pemahaman konsep tertinggi adalah “Translasi”, ini terjadi pada kelas kontrol. Kata Kunci: Model Pembelajaran PBL Berbasis Eksperimen, Pemahaman Konsep, Gaya Berpikir.
Application of dynamic electricity: Series and Parallel learning model with ISLE-based STEM approach for students with disabilities Yuli Andriani; Irwandi Irwandi; Mursal Mursal; Mailizar Mailizar; Elin Yusibani
Journal of Aceh Physics Society Volume 10, Number 1, January 2021
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v10i1.18955

Abstract

Abstrak. STEM Research Center telah mengembangkan beberapa modul dengan pendekatan model STEM berbasis Investigative Science Learning Environment (ISLE) dan telah berhasil mengimplementasikan pada sekolah umum di Aceh. Modul yang telah dikembangkan selanjutnya akan diterapkan kepada siswa penyandang disabilitas tunarungu di SMALB YPAC Kota Banda Aceh. Penerapan model pembelajaran menggunakan STEM berbasis ISLE yakni didasarkan pada kegiatan observasi dan diskusi berkaitan dengan empat bidang disiplin ilmu yakni sains, teknologi, enjinering dan matematika. Modul pembelajaran yang dikembangkan terdapat dua kegiatan belajar, yaitu kegiatan belajar yang berkaitan dengan eksperimen pengamatan dan kegiatan belajar yang berkaitan kegiatan eksperimen sederhana dengan menguji kebenaran hasil prediksi. Rangkaian listrik dinamis yang diberikan adalah rangkaian sederhana yang dipasangkan secara seri dan paralel. Untuk alat peraga listrik dinamis yang digunakan, pengamatan tidak mengalami permasalahan. Siswa dapat mengikuti lembar kerja modul ISLE dengan baik. Proses diskusi dalam kelompok masih dapat dilakukan, namun terdapat masalah dalam hal mengkomunikasikan ide-ide antar kelompok.Abstract. STEM Research Center has developed several modules with the ISLE-based STEM model approach and has successfully implemented them in regular schools in Aceh. The module that has been developed will then be applied to students with hearing disabilities at YPAC High School Banda Aceh City. The application of the learning model uses the ISLE-based STEM which is based on observation and discussion activities related to four fields, namely science, technology, engineering, and mathematics. The learning module developed has two learning activities, namely learning activities related to experimental observations and learning activities related to simple experimental activities by testing the correctness of the predicted results. A given dynamic electric circuit is a simple circuit that is paired in series and parallel. For dynamic electric props used, the observation does not experience any problems. Students can follow the ISLE module worksheets well. The discussion process in groups is still possible, but there are problems in communicating ideas between groups.Keywords: ISLE based STEM module, Deaf, Dynamic electricity
MgTiO3 Thin Films Synthesis by Sol Gel Method widya Angreni; Mursal Mursal; Elin Yusibani
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan sintesa lapisan tipis MgTiO3 dengan menggunakan metode Sol Gel. Lapisan tipis MgTiO3 dibuat dengan mencampurkan TiO dan MgSO4 sebagai prekursor. Larutan ini kemudian diaduk selama 1 jam agar campuran menjadi homogen dengan menggunakan magnetic stirrer. Lapisan tipis MgTiO3 dipanaskan dengan variasi suhu mulai dari 300, 400, 500 dan 60oC selama 1 jam. Berdasarkan hasil pengujian XRD menunjukkan bahwa pada suhu 300 - 500oC nilai ukuran butir kristal semakin besar, sementara pada suhu 600oC ukuran butir kristal mengecil. Struktur kristal yang terbentuk dari lapisan tipis MgTiO3 adalah rutil. Hasil SEM menunjukkan lapisan MgTiO3 terdeposisi dengan baik yang ditunjukkan dengan tidak munculnya retakan pada permukaan lapisan serta terdapat adanya pori yang terbentuk dan ketebalan lapisan tipis MgTiO3 berkisar antara 1,67 – 1,79 µm. Hasil pengujian UV-Vis menunjukkan suhu pemanasan mempengaruhi turunnya nilai band gap. Semakin tinggi suhu pemanasan semakin kecil band gap yang dihasilkan, yaitu pada suhu 300oC bernilai 3,22 eV dan pada suhu 600oC bernilai 3,02 eV.MgTiO3 thin films synthesis has been done using Sol Gel method. The MgTiO3 thin films is made by mixing TiO and MgSO4 as precursors. This solution is then stirred for 1 h to have homogeneous mixture by using a magnetic stirrer. The MgTiO3 thin films is heated with temperature variations range of 300, 400, 500 and 600°C for 1 h. Based on XRD test showed that at 300 - 500 oC value of crystalline grain size was increased, while at 600oC the size of crystal grains decreased. The crystalline structure formed from a thin films of MgTiO3 is rutile. The SEM results show a well-deposited MgTiO3 films which is indicated by the absence of cracks on the surface of the coating and there is a pore formed and the thickness of the MgTiO3 thin films range of 1.67 to 1.79 μm. UV-Vis test show that the heating temperature affects the decrease in band gap value. The higher the heating temperature give the smallerof band gap, ie at a temperature of 300oC worth 3.22 eV and at a temperature of 600oC worth 3.02 eV, respectively.Keywords: MgTiO3 thin films, Sol Gel, XRD, SEM, UV-Vis.DAFTAR PUSTAKAAngela, R., dan Pratapa, S. 2012. Sintesis MgTiO3 dengan Variasi Temperatur Kalsinasi Menggunakan Metode Pencampuran Larutan. Jurnal Sains dan Seni ITS Vol. 1, ISSN: 2301-928XBasitoh D., Is Fatimah., and Tatang S. J. Penggunaan Ekstrak Pigmen Kulit Buah Manggis (Garnicia mangostana) Sebagai Zat Peka Cahaya TiO2-Montmorillonit Dalam Dye-Sensitized Solar Cell (DSSC). FMIPA. Universitas Islam Indonesia. Yogyakarta.Badawy M.I., Souaya E.M.R., Gad-Alah T.A., Abdel-Wahde M.S., Ulbricht M. 2013. Fabrication of Ag/TiO2 Photocatalytic for the treatment of simulated hospital wastewater under sunlight. Enviromental Progress and Sustainable Energy.33 (3), 886-894.Chao W-S., Ting C-C., 2010. Experimental Study On Reversal Structure Of Photoelectrode In Dsscs. Proceedings of the ASME 2010 International Mechanical Engineering Congress Exposition IMECE2010 Vancouver, British Columbia, Canada IMECE2010-38497Dadi, R., 2014. Pembuatan Sel Surya TiO2 Nanokristal Berbahan Dasar Anthocyanin Sebagai Material Dye, Prosiding Pertemuan Ilmiah XXVIII HFI Jateng DIY, Yogyakarta, ISSN : 0853-0823.Gratzel, M. (2003). “Review: Dye Sensitized Solar Cells”, Journal of Photochemistry and Photobiology C: Photochemistry Reviews, Vol. 4, hal. 145– 153.Green, Martin A.1982. Solar Cell Operating Principles Technology And System Application”prenticell Hall, IncEvylewood Cliffs N,J. Hardeli, Suwardani, Riky, Fernando, T., Maulidis, dan Ridwan, S. 2013. Dye Sensitized Solar Cell (DSSC) Berbasis Nanopori TiO2 Menggunakan antosianin dari Berbagai Sumber Alami. Prosiding Semirata FMIPA Universitas Lampung.Helga, D. F., Samsidar, Faizar, F., Heriyanti, Sampe Napitupulu, dan Sarina, P, 2015. Disain Prototipe Sel Surya DSSC (Dye Sensitized Solar Cell) Lapisan Grafit/TiO2 Berbasis Dye Alami, Prodi Fisika dan Prodi Kimia, FST, Universitas Jambi.Heriyanti, S., 2006, Kajian Sensitisasi Lapis Tipis TiO2 oleh Zat Warna Alami untuk Sel Surya Berbasis Sensitiser Zat Warna, Skripsi, FMIPA UGM, Jogjakarta. Ludin, N.A., dkk. 2014. Review on The Development of Nature Dye Photosensitizer for Dye Sensitized Solar Cell. Renewable and Suinable Energy, 386-396.Linsebigler, A.L., Lu, G. Dan Yates, J.T., 1995, Photocatalysis on TiO2 Surface:Principles, Mechanism and Selected Results, Chem. Rev., 95, 735-758.Maya, S., Widya, K., Drs. Gontjang, P, M.Si.,2012. Studi Awal Fabrikasi Dye Sensitized Solar Cell (DSSC) Dengan Menggunakan Ekstraksi Daun Bayam Amaranthus Hybridus l.) Sebagai Dye Sensitizer Dengan Variasi Jarak Sumber Cahaya Pada DSSC, Jurusan Fisika, FMIPA Institut Teknologi Sepuluh NopemberMulyadi, T. 2015. Pengertian, Ciri, dan Sifat magnesium. http://budisma.net/2015/02/pengertian-ciridan-sifat-magnesium.html (Tanggal akses, 26 Februari 2015)Nam, T. V., Trang, N. T., and Cong, B. T. 2012. Mg-Doped TiO2 for Dye-Sensitized Solar Cell: An Elektronic Structure Study. Proc. Natl. Conf. Theor. Phys. 37, pp. 233-234.O’Regan dan Gratzel, 1991, A Low Cost, High Eficiency Solar Cell Based On Dye Sensitized Coloidal TiO2 film, Nature, 737740.Ratnasari, D., Hermanihadi, S., Indriyanto, W., Fathony, A., Devi WH. F., Agung R, P. dan Amin Rais, Y. 2009. Tugas Kimia Fisika X-Ray Diffraction (XRD), Surakarta: FT UNS.Slamet, Syakur R dan Danumulyo W. 2003. Pengolahan Limbah Logam Berat Chromium (VI) Dengan Fotokatalis TiO2. Makara, Teknologi, 7 (1): 27-32.Smestad and Gratzel M. 1998. Demonstrating Electron Tranfer and Nanotechnology; A Natural Dye-Sensitized Nanocristallin Energy Converter. J, Chem.Educ. 75,752756.Suhartatik, N., Karyantina, M., Mustofa, A., Cahyanto, M. N., Raharjo, S., Rahayu, E. S. 2013. Stabilitas Ekstrak Antosianin Beras Ketan Hitam (Oryza sativa glutinosa) selama Proses Pemanasan dan Penyimpanan. Jurnal Agritech Vol. 33, No. 4, Yogyakarta.Septina, W., Fajarisandi, D., Aditia, M. Pembuatan prototip solar cell dengan bahan organik-inorganik (dye sensitized solar cell). Laporan Akhir Penelitian Bidang Energi, Penghargaan PT. Rekayasa Industri (2007)Vlanck, V, Lawrence. 2004. Elemen-elemen Ilmu dan Rekayasa Material Edisi Ke-6. Jakarta: Erlangga. Wulandari, H., 2008. Performa Sel Surya Tersensitasi Zat Pewarna (DSSC) Berbasis ZnO Dengan Variasi Tingkat Pengisian dan Besar Kristalit TiO2, Skripsi, Jurusan Teknik Metalurgi dan Material, Fakultas Teknik Universitas Indonesia.Xu, Shi, Fan, Dong, Shi, dan Hu. 1999. Effects of Particle Size of TiO2 on Photocatalytic Degradation of Methylene Blue in Aqueous Suspensions. Chemical Reviews, (38): 373379.Yuwono, A. H., Munir, B., Ferdiansyah, A., Rahman, A., dan Handini, W. 2010. Dye Sensitized Solar Cell with Conventionally Annealed and Post- Hydrothermally Treated Nanocrystalline semiconductor Oxide TiO2 Derived from Sol-gel Process. Jurnal Makara Teknologi, Vol. 14, No. 2Zamrani R.A., dan Gontjang P., 2013. Pembuatan Dan Karakterisasi Prototipe Dye Sensitized Solar Cell (DSSC) Menggunakan Ekstraksi Kulit Buah Manggis Sebagai Dye Sensitizer Dengan Metode Doctor Blade, Jurnal Sains Dan Seni Pomits Vol. 1, No.2, 2301-928X.
A Study on the utilization of coffee grounds for particle board Cut Rizka Maulida; Mursal Mursal; Ismail Ismail
Journal of Aceh Physics Society Volume 10, Number 2, April 2021
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v10i2.19063

Abstract

Abstrak. Penelitian ini bertujuan untuk membuat papan partikel dengan menggunakan limbah ampas kopi dan resin epoksi sebagai perekat. Komposisi resin epoksi divariasikan yaitu 5, 10, 15 dan 20 vol.% untuk masing-masing partikel ampas kopi berukuran 20 dan 40 mesh. Papan partikel dibuat dengan teknik pressing dengan beban sebesar 9 ton selama 30 menit. Sifat mekanik yang diuji adalah MOE, MOR, dan kuat tekan. Sifat fisis papan partikel yang diuji adalah kerapatan dan pengembangan tebal. Hasil menunjukkan bahwa nilai MOE tertinggi yaitu 20,910 kgf/cm2 pada komposisi 95 vol.% ampas kopi dan 5 vol.% resin epoksi dengan ukuran ampas kopi 40 mesh. MOR tertinggi yaitu 167 kgf/cm2 pada ukuran partikel 40 mesh dengan komposisi ampas kopi 90 vol.% dan resin epoksi 10 vol.%. Nilai kuat tekan tertinggi diperoleh 220 kgf/cm2 pada 20 mesh, dengan komposisi 85 vol.% ampas kopi dan 15 vol.% resin epoksi. Kerapatan dan pengembangan tebal papan partikel yang tertinggi masing-masing adalah 1,16 g/cm3 dan 0,85%. Secara umum, sifat mekanis papan partikel ampas kopi tergantung pada komposisi dan ukuran partikel ampas kopi. Namun, sifat fisisnya tidak berubah secara signifikan untuk ukuran partikel dan komposisi yang berbeda. Papan partikel yang diperoleh dari penelitian ini memenuhi standar ANSI sehingga berpotensi untuk dijadikan sebagai papan partikel atau komposit. Abstract.. This study aims to make a particle board using coffee ground waste and epoxy resin as an adhesive. The composition of the epoxy resin was varied, namely 5, 10, 15 and 20 vol.% for 20 mesh and 40 mesh of coffee grounds particles. Particle board is made by pressing technique with a load of 9 tons for 30 minutes. The mechanical properties tested were MOE, MOR, and compressive strength. The physical properties of the particle board tested were density and thickness swelling. The results showed that the highest MOE particle board was 20.910 kgf/cm2 (95 vol.% coffee grounds:5 vol.% epoxy resin; 40 mesh). The highest MOR was 167 kgf/cm2 (90 vol.% coffee grounds:10 vol.% epoxy resin;40 mesh). The hihgest compressive strength values was 220 kgf/cm2 (85 vol.% coffee grounds:15 vol.% epoxy resin;20 mesh). The highest density and thickness expansion were 1.16 g/cm3 and 0.85%, respectively. In general, the mechanical properties of coffee grounds particleboard depend on the composition and particle size of coffee grounds. However, their physical properties do not change significantly for different particle sizes and compositions. The particle board obtained from this study meets the standard of ANSI. Thus, coffee grounds have the potential to be used as particle board or composite. Keywords particle board, coffee grounds, epoxy resin, mechanical properties, physical properties
Minerals Identification of Bio-Solar Gemstone from Aceh Akmal Nizar; Mursal Mursal; Ismail Ismail
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (78.278 KB)

Abstract

Salah satu batu mulia yang terkenal di Aceh disebut Bio-Solar. Batu permata ini banyak ditemukan di Aceh, namun, informasi detail tentang batu permata ini masih sangat terbatas. Dalam penelitian ini telah dilakukan karakterisasi batu permata Bio-Solar yang berasal dari Aceh dengan menggunakan X-Ray Florescent (XRF). Hasil penelitian menunjukkan bahwa batu permata Bio-Solar mengandung mineral-mineral CaO (59,8%), SiO2 (19,7%), Fe2O3 (11,1%), Al2O3 (7,5%), dan NiO (1,3%). Dengan membandingkan hasil ini dengan data-data penelitian sebelumnya, telah ditemukan bahwa batu permata Bio-Solar dapat diklasifikasikan sebagai jenis batu giok Vesuvianite. One of well-known gemstones in Aceh is called Bio-Solar. This gemstone is found a lot in Aceh. Nonetheless, the detail information of this gemstone is still limited. None knows if this gemstone can be classified as jade. This study has characterized this gemstone (Bio Solar) from Aceh using X-Ray Florescent (XRF). The results show that the Bio-Solar gemstone contains minerals of CaO (59.8%), SiO2 (19.7%), Fe2O3 (11.1%), Al2O3 (7.5%), and NiO (1.3%). By comparing this results to the available mineral data, we found that the Bio-Solar gemstone from Aceh can be classified as Vesuvianite jade. Keywords: Batu Giok, Bio Solar, Vesuvianite, XRF
Use of SiO2 Rice Husk Ash and Ni in Materials Solid Hydrogen Storage Based on MgH2 Taufik Taufik; Zulkarnain A Jalil; Mursal Mursal
Journal of Aceh Physics Society Volume 9, Number 1, January 2020
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v9i1.15047

Abstract

Telah dilakukan penyisipan silika (SiO2) dan nikel (Ni) ke dalam MgH2 dengan menggunakan teknik preparasi mechanical alloying. Hasil observasi dengan XRD menunjukkan bahwa proses pemilingan selama 2 jam material MgH2 + Ni + SiO2 berhasil direduksi hingga skala nanokristal. Fasa yang muncul, dari hasil pengujian dengan XRD adalah fasa MgH2 sebagai fasa utama, sedangkan fasa Ni dan fasa SiO2 sebagai fasa minor. Hasil pengamatan dengan TGA pada sampel MgH2 + 5 %wt Ni + 3 %wt SiO2,hidrogen mengalami desorpsi pada temperatur 362,04oC sebesar 10,3 %wt selama 3,58 menit. Hasil pengamatan pada sampel MgH2 + 5 %wt Ni + 15 %wt SiO2, hidrogen mengalami desorpsi pada temperatur 351,4oC sebesar 10,3 %wt selama 3,77 menit. Silica (SiO2) and nickel (Ni) insertion into MgH2 has been carried out using mechanical alloying preparation techniques. The results of observations with XRD showed that the grinding process for 2 h of MgH2 + Ni + SiO2 material successfully reduced to the nanocrystal scale. The phase that emerges, from the test results using XRD is the MgH2 phase as the main phase, while the Ni and SiO2 phases are minor phases. Observations using TGA on MgH2 + 5% wt Ni + 3% wt SiO2 samples, the hydrogen undergoes desorption at 362.04oC of 10.3% wt for 3.58 min. And the results of observations on MgH2 + 5% wt Ni + 15% wt SiO2 samples, the hydrogen undergoes desorption at 351.4oC at 10.3% wt for 3.77 min. Keywords: Silica, Nickel, MgH2, mechanical alloying, nanocrystal
Co-Authors A Halim A. Halim Abdillah Imron Nasution Abdul Gani ABDUL GANI Abu Bakar Adlim Adlim Akmal NIzar Amiruddin Supu Anak Agung Gede Sugianthara Angreni, widya Athaillah Athaillah Ayel Sarwono Lahra Burhannudin Chanafi Cut Rizka Maulida Devya Kartika Devya Elin Yusibani Ibnu Khaldun Ida Usman Iqbal Saputra Irhamni Irhamni Irwandi Irwandi Irwandi Irwandi ISMAIL ISMAIL Junaidi Junaidi Lindawati Lindawati Mailizar Mailizar Mohamad Barmawi Muhammad Hasan Nasri Nasri Rahmi Maulidati Riesyaputra Riesyaputra Sukirno Sukirno Suriana Suriana Suriana Suriana Syarifah Rahmiza M T Winata Tarmizi Tarmizi Taufik Taufik Tengku Diah Zulismi Putri Toto Winata Trya Andayani Mirda Ummi Salamah Ummi Salamah Yuli Andriani Yundari, Yundari Yusrizal Yusrizal Zia Nurkhalida Hatta Zulhaini Zulhaini Zulkarnain A Jalil Zulkarnain Djalil