Analisa Ukuran Partikel Serbuk Komposit NiCrAl dengan Penambahan Reaktif Elemen untuk Aplikasi Lapisan Tahan Panas [Particle Size Analysis of NiCrAl Composite Powders with Reactive Elements Addition for Thermal Barrier Coating Applications]

Desiati, Resetiana Dwi; Sugiarti, Eni; Ramandhany, Safitry

doi:10.14203/metalurgi.v33i1.358

Cited by 5 publications

(4 citation statements)

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“…Agglomeration occurs because particles interact with each other (Melinia et al, 2022), thus creating larger clumps of particles. This interaction is caused by the presence of quite strong electrostatic forces on the particles (Desiati et al, 2018), apart from being influenced by humidity due to the presence of H2O on the surface of the nanoparticles. The surface looks uneven because of the presence of small, irregular particles that stick irregularly to the surface of the grain.…”

Section: The Sem-edx Resultsmentioning

confidence: 99%

Type-B Carbonated Hydroxyapatite Based on Crab Shells: A Review on Synthesis and Characterization

Muarif

2024

J. Energy Mater. Instrum. Technol.

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The synthesis and characterization of B-type CHAp based on mangrove crab shells (Scylla serrata) as a source of calcium using the precipitation method has been successfully carried out. Based on the FTIR results, the substitution of carbonate ion for phosphate, which indicates the formation of B-type CHAp, is characterized by the appearance of absorption at wave numbers (CO32-) 1426 and 875 cm-1, PO43- at wave numbers 965, 619 & 569 cm-1. The XRD results show that diffraction peaks (211), (300), and (202) appear at an angle of 2θ ranging from 31°-34°, and there is a phenomenon of a-axis contraction and c-axis expansion in the HAp lattice structure. The SEM-EDX results show that the Ca/P ratio is 1.72, and the carbonate content is 5.01 wt%. All of these parameters are characteristics of CHAp, so it can be concluded that type-B CHAp has been formed.

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Section: The Sem-edx Resultsmentioning

confidence: 99%

Type-B Carbonated Hydroxyapatite Based on Crab Shells: A Review on Synthesis and Characterization

Muarif

2024

J. Energy Mater. Instrum. Technol.

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“…The working principle of SEM is as follows, an electron gun produces an electron beam and is accelerated by the anode then a magnetic lens focuses the electrons towards the sample, and the focused electron beam scans (scans) the entire sample directed by the scanning coil. Then when the electrons hit the sample, the sample will emit new electrons which will be received by the detector and sent to the monitor Cathode Ray Tube (CRT) [18]. When observing the material, the location of the surface of the object being shot with the highest intensity electron beam is scanned over the entire surface of the observed material.…”

Section: Determination Of Bioactive Substance Particle Size By Semmentioning

confidence: 99%

The Potential of Sea Urchin (Diadema Setosum) Extracts as Antibacterial Against Staphylococcus Aureus

Hardani,

Sukmana,

Atfal

2023

Trends Sci

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Secondary metabolites from sea urchin shells contain active substances with the potential of antibiotics. The purpose of this study was to investigate how sea urchin shell extract affected the development of the Staphylococcus bacterium. In this kind of research, the active chemical content of sea urchin shell extract was examined quantitatively, using scanning electron microscope (SEM) and Fourier Transform Infrared (FTIR), as well as the extract’s effect on the development of Staphylococcus aureus bacteria. According to the study, the average level of total flavonoids was 1.29 %, total alkaloids were 0.12 %, and total tannins were 1.0 %. Sea urchin shell powder has an absorbance of 0.42 at a wavelength of 1,400.84 cm–1. According to microbiological experiments, sea urchin shell ethyl acetate extract was able to stop Staphylococcus aureus growth in the category of the strong inhibition zone (inhibition zone diameter of 12 mm). Extract from sea urchin shells has antibacterial properties and may be used to make anti-diabetic ointments. This fabrication is a fantastic option for use in healthcare and medicine. HIGHLIGHTS In this study, there are several main points including: The objective of this research is to determine the antibacterial activity of sea urchin shell extracts with various solvents. FTIR and SEM results to determine the particle size of sea urchin shell powder and the compounds contained therein. Based on the results of the proximate test to see the antioxidant activity of the extract, it is known that the ethyl acetate extract contains the most flavonoid extract (1.6 %w/w). Ethyl acetate extract can inhibit the growth of Staphylococcus aureus bacteria in the Strong inhibition category. GRAPHICAL ABSTRACT

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“…Analisa SEM pada penelitian ini menggunakan perbesaran 500x, 1000x dan 5000x. Hal ini bertujuan agar proses penandaan area dapat sesuai dengan bentuk partikelnya sehingga lebih jelas dan presisi [17]. Perbesaran yang tinggi, depth of field yang besar dan resolusi yang baik membuat SEM banyak digunakan untuk keperluan penelitian dan industry [18].…”

Section: Karakteristik Katalis Sebelum Dan Sesudah Proses Metanasiunclassified

Pembentukan Gas Metan dari Karbon Dioksida Menggunakan Katalis Ni/Al2O3 dengan Penambahan Mn Sebagai Promotor

Friema,

Junaidi,

Zamhari

2023

JSE

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Carbon dioxide (CO2) emissions are a type of greenhouse gas emission which is the main factor in the emergence of the global warming phenomenon. Based on the total CO2 emissions released, there are 3 components that most influence high CO2 emissions, namely the electricity sector (42%), transportation (23%) and housing (6%). The trend of increasing CO2 will continue if no preventive measures are taken globally. One of these preventive efforts is to convert carbon dioxide (CO2) into methane (CH4), or known as the methanation process of carbon dioxide. In the field of fuel, the conversion of carbon dioxide into methane gas has more advantages in terms of thermodynamics. One of the factors that determine the methanation process is the activity of the catalyst. The catalyst used in this study was the Ni/Al2O3 catalyst. Ni/Al2O3 catalyst is a catalyst that has good performance in the methane formation process. However, the Ni/Al2O3 catalyst has disadvantages, one of which is that it is susceptible to carbon deposition and sintering on the catalyst. One way to improve catalyst stability performance is by adding a promoter. This research was carried out by varying the temperature, the amount of Ni/Al2O3 catalyst and adding a promoter to give structural changes to the catalyst. The results showed that the temperature and the amount of catalyst affect the amount of CH4 formed, and the addition of manganese (Mn) initiator can affect the pore structure ofÂ theÂ catalyst.

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Analisa Ukuran Partikel Serbuk Komposit NiCrAl dengan Penambahan Reaktif Elemen untuk Aplikasi Lapisan Tahan Panas [Particle Size Analysis of NiCrAl Composite Powders with Reactive Elements Addition for Thermal Barrier Coating Applications]

Cited by 5 publications

References 0 publications

Type-B Carbonated Hydroxyapatite Based on Crab Shells: A Review on Synthesis and Characterization

Type-B Carbonated Hydroxyapatite Based on Crab Shells: A Review on Synthesis and Characterization

The Potential of Sea Urchin (Diadema Setosum) Extracts as Antibacterial Against Staphylococcus Aureus

Pembentukan Gas Metan dari Karbon Dioksida Menggunakan Katalis Ni/Al2O3 dengan Penambahan Mn Sebagai Promotor

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