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Simon Sembiring
Departement of Physics, University of Lampung, Indonesia, 35141
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Sintesis dan Karakteristik Struktur, Sifat Fisis, dan Sifat Mekanik Komposit Aspal Silika dengan Variasi Komposisi Aspal Silika (20%:80%wt; 15%:85%wt; 10%:90%wt) Enang Widwiyantoro; Simon Sembiring; Syafriadi Syafriadi; Suprihatin Suprihatin
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.32 KB) | DOI: 10.23960/jemit.v1i2.20

Abstract

Synthesis and characterization of asphalt silica composites with various compositions have been carried out 20%: 80%wt; 15%: 85%wt; 10%: 90%wt. Silica synthesis was carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH 1,5% and HNO3 10%. This research was conducted for knowing the effect variations composition of asphalt silica on the phase structure, physical, and mechanical properties. The results of characterization asphalt silica composites with X-Ray Diffraction (XRD) obtained nothing change of phase and so that the phase structure still amorphous that consist of amorph silica and amorph carbon. The result of water adsorbent testing obtained that all variation was infest the standard, which was above 10%. The result compressive strength testing obtained the variation 15%:85%wt got the highest value amount 47,55 Mpa.
Karakteristik Struktur Mikro Komposit Aspal Silika Sekam Padi Dengan Variasi Komposisi (20%:80%, 15%:85% dan 10%:90%) Qori Sari Dewi; Simon Sembiring; Syafriadi Syafriadi; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.954 KB) | DOI: 10.23960/jemit.v1i2.23

Abstract

Synthesis and characterization of rice husk and asphalt silica composites with various compositions have been carried out 20%: 80%, 15%: 85% and 10%: 90%. Silica synthesis from rice husk wa carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH and HNO3. This research was conducted of variations in the composition the effect of silica and asphalt on the microstructure and structure of the sample. The characterization results of Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM-EDS) on the surface of silica asphalt composites in the form of erratic clots and cracks on the surface of the sample with an average grain size of 3.483 µm, 8,127 µm, and 7,192 µm. The analysis EDS results in the elements content contained in the sample elements of carbon (C), silicon (Si), oxygen (O), a little element of sulfur (S) and aluminum (Al). Then, the results of the X-Ray Diffraction (XRD) characterization obtained the structure of amorphous silica and amorphous carbon.
Pengaruh Variasi Suhu Sintering Menggunakan Metode Pencampuran Basah M. Muntamijayati; Suprihatin Suprihatin; Yanti Yulianti; Simon Sembiring
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.158 KB) | DOI: 10.23960/jemit.v1i2.29

Abstract

The superconducting material BPSCCO-2212 with doping Pb = 0,2 has been synthesized by the wet mixing method. Calculation is caried out at 800 °C for 10 hours. While sintering is done at 825 °C, 830 °C, 835 °C and 840 °C for 20 hours. The synthesis result were characterized by XRD X-Ray Diffraction) and SEM (Scanning Electron Microscopy). The XRD spectrum analysis results that have been processed using celref, show that in general the samples produced have formed the BPSCCO-2212 phase (indicated the presence of Bi-2212 peaks) and have been oriented (indicated the existence of peaks with h = k = 0, l even number). For the calculation result obtanced the highest volume fraction value at 830 °C sintering temperature with a value FV = 66,97 % and the highest degree of orientation at 825 °C with a value of P = 76,54 %. The results of the SEM photo recorder generally show that the crystals formed are oriented.
Ekstrak Daun Pandan Sebagai Inhibitor Korosi Baja St37 Dalam Larutan NaCl 3% dengan Suhu Perendaman 27°C dan 40°C Siti Fatkhul Ulum; Ediman Ginting; Simon Sembiring
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 1 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The extract of pandan leaf used as corrosion inhibitor of St37 steel in NaCl 3% solution. To determine the effect of inhibitor concentration and immersion temperature on steel corrosion is done with variation of inhibitor concentration there were 0, 1,8, 1,2, and 1,4% and temperature variation is 27°C and 40°C. Corrosion rate testing is done by weight loss method. Increased corrosion rate along with increasing sample weight loss. Inhbitor pandan leaf extract were the most efficient at concentration of 1.2% with soaking temperature at 27°C and 40°C. Samples were also in the characterization of XRD and SEM-EDS. The XRD results showed that the highest Fe peak was formed in a sample using a 1.2% inhibitor concentration and the lowest Fe peak in the sample without inhibitor. The SEM characterization results also showed that in samples without inhibitors look more corroded, and in samples using 1.2% inhibitor concentrations look slightly corroded. These results were reinforced by the percentage of corrosion products shown in EDS results.
Co-Authors Ediman Ginting Enang Widwiyantoro M. Muntamijayati Qori Sari Dewi Siti Fatkhul Ulum Suprihatin Suprihatin Syafriadi Syafriadi Yanti Yulianti