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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia The Journal of Pure and Applied Chemistry Research JFA (Jurnal Fisika dan Aplikasinya) Omega: Jurnal Fisika dan Pendidikan Fisika InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan Science and Technology Indonesia Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Spektra: Jurnal Fisika dan Aplikasinya Communications in Science and Technology PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Saptari, Sitti Ahmiatri
Department Of Physics, Faculty Of Science And Technology UIN Syarif Hidayatullah Jakarta
Aerospace Engineering Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

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DAMAGE ANALYSIS OF INSULATED PIPES USING DIGITAL DETECTOR ARRAY DAN COMPUTED RADIOGRAPHY Tjahjono, Arif; Pratama, Elfriani Dita; Hanuarjie, Baskan; Saptari, Sitti Ahmiatri; Kumila, Biaunik Niski
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v8i1.46385

Abstract

The provision of insulation on the pipe functions to prevent heat transfer, but the provision of this insulation causes the pipe to be susceptible to damage due to oxidation. In this study, an analysis of damage to insulated pipes will be carried out using a Digital Detector Array (DDA), Computed Radiography (CR), and XRF. Based on the test results, it is known that the image quality using DDA with a voltage of 240 kV produces the most optimal contrast resolution. The results of the thickness dimension measurement using the DDA method on insulated pipes are 3.38 mm, and on insulated pipes with artificial defects are 4 mm. Compared with the CR method, the values are 3.02 mm and 3.94 mm, respectively. The smaller the difference, the more accurate. From the calculation of the ISee software, it is also known that the DDA method can detect a greater number of defects, namely 24, compared to the CR method, which has only 14. The results of the XRF test show that the insulated pipe includes low-carbon steel with a carbon content of 0.057% and 94% ferrum. This high ferrous content contributes to increased X-ray absorption, greatly affecting the images quality.
Synthesis and Characterization of Activated Carbon From Biomass Waste as A Microwave Absorber Material Nuras, Muhammad Ishaq; Saptari, Sitti Ahmiatri; Tjahjono, Arif; Priambodo, Danang Pamungkas; Haiqal, Amanda
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, N
Publisher : Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v7i1.41310

Abstract

Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterization of the material. The tests revealed that the activated carbon possessed a porous structure, which is essential for its absorption capabilities. The surface areas measured were 4.378 m²/g for water hyacinth, 2.518 m²/g for melinjo seed shells, and 2.992 m²/g for chicken eggshells. These surface areas are indicative of the material's potential effectiveness. Additionally, the microwave absorption capacities of the activated carbon were recorded as -18.342 dB for water hyacinth, -13.326 dB for melinjo seed shells, and -12.484 dB for chicken eggshells. These findings suggest that the activated carbons are highly effective as microwave absorber materials, with an absorption efficiency ranging between 94% and 98%.Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterization of the material. The tests revealed that the activated carbon possessed a porous structure, which is essential for its absorption capabilities. The surface areas measured were 4.378 m²/g for water hyacinth, 2.518 m²/g for melinjo seed shells, and 2.992 m²/g for chicken eggshells. These surface areas are indicative of the material's potential effectiveness. Additionally, the microwave absorption capacities of the activated carbon were recorded as -18.342 dB for water hyacinth, -13.326 dB for melinjo seed shells, and -12.484 dB for chicken eggshells. These findings suggest that the activated carbons are highly effective as microwave absorber materials, with an absorption efficiency ranging between 94% and 98%.
Microwave Absorption Performance of La0.7Sr0.3MnO3/AC Composite Material Based on Activated Carbon from Gnetum gnemon Seed Shell Priambodo, Danang Pamungkas; Saptari, Sitti Ahmiatri; Tjahjono, Arif; Manawan, Maykel T; Taryana, Yana; Hadiyawarman; Admi, Ratna Isnanita
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1727

Abstract

The 5G internet network has been proven to facilitate daily life for people and render electronic devices such as smartphones as an integral component of people's daily routine. However, in conjunction with the ease of use, there is an issue of electromagnetic radiation. To cope with this issue, magnetic and dielectric composite microwave absorber materials have been undertaken. To address this, we investigated the limitations of activated carbon composite material from Gnetum gnemon seed shells (AC) on the microwave absorption ability of (La0.7Sr0.3MnO3)1-y/(AC)y. The composite material (La0.7Sr0.3MnO3)1-y/(AC)y (y = 0; 0.3; 0.5; 0.7) was synthesized through a stirring process with a 96% ethanol catalyst using La0.7Sr0.3MnO3 synthesized by sol-gel method and activated carbon material from Gnetum gnemon seed shell (AC) synthesized by chemical activation method. The XRD and SEM characterizations indicated a single-phase structure, with smaller crystals and particles that were uniformly distributed throughout the composite sample. The presence of activated carbon grains from Gnetum gnemon seed shells (AC) were observed between the La0.7Sr0.3MnO3 grains in the composite sample. The EDS results confirmed the material’s purity. VNA characterization demonstrated that (La0.7Sr0.3MnO3)1-y/(AC)y was capable of producing two reflection loss troughs with the largest absorption percentages recorded at 82.99% and 85.82% respectively within the frequency range of 8 – 12 GHz. This research highlights the significance of controlled composite composition in enhancing microwave absorption capability, particularly in perovskite-based composites with biomass-activated carbon, which holds a considerable promise for applications in electromagnetic wave attenuation and absorption technologies.
Co-Authors Adhika Junara Karunianto Admi, Ratna Isnanita Agung Imaduddin Ahmad Firdaus Ana Hasanah Anggita Prasanti Anugrah Azhar Apriatin, Apriatin Arif Tjahjono Arif Tjahjono Arif Tjahjono Azwar Manaf Bagus Septyanto Bambang Prihandoko Betty Haifa Sarwono Budhy Kurniawan Christin Rina Ratri Deni Shidqi Khaerudini Dewi Lestari Dian Nurdiana Dwi Nanto, Dwi Elvan Yuniarti Erfan Handoko Fajar Arif Kurniawan Fajriah, Nurul Fira Rizky Hadiyawarman Haiqal, Amanda Hanuarjie, Baskan Hapitanur, Dinda Hilwa Kamilah Juli Hartati Kumila, Biaunik Niski Kurniawan, Budhy Kurniawan, Budhy Laksanawati, Wahyu Dian Lediliocza Lediliocza Loua, Lamin Rene Manawan, Maykel T Mar’ah, Mufidatul Muhammad Fajri Maulana Muhammad Umar Faruqi Mujadid Al-Rabi Nada Hashida Lathifah Nadhia Fairuz Syafira Nanang Sudrajat, Nanang Nur Fitriani Nuras, Muhammad Ishaq Nurlaela, Ai Pratama, Elfriani Dita Priambodo, Danang Pamungkas qolby sabrina Rahman, Ikhwan Nur Riser Fahdiran Ryan Rizaldy Sarah Aulia Slamet Priyono Taryana, Yana Titik Lestariningsih Tjahjono, Arif Utami Widyaiswari Widyaiswari, Utami Wisnu Ari Adi Yuniarti, Elvan Yuniarti, Elvan