S
Suminar Pratapa
Researcher at Sepuluh Nopember Institute of Technology
Publications - 131
Citations - 787
Suminar Pratapa is an academic researcher from Sepuluh Nopember Institute of Technology. The author has contributed to research in topics: Crystallite & Ceramic. The author has an hindex of 12, co-authored 119 publications receiving 586 citations. Previous affiliations of Suminar Pratapa include Curtin University.
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Journal ArticleDOI
Nanoscale Clustering and Magnetic Properties of Mn x Fe3−x O4 Particles Prepared from Natural Magnetite
Ahmad Taufiq,Ahmad Taufiq,Sunaryono,Sunaryono,Edy Giri Rachman Putra,Atsushi Okazawa,Isao Watanabe,Norimichi Kojima,Suminar Pratapa,Darminto +9 more
TL;DR: In this paper, the authors applied two lognormal spherical and single mass fractal models to the analysis of the small-angle neutron scattering (SANS) data and revealed that the primary Mn>>\s ranged in size from 1.5 to 3.8 nm and formed three-dimensional clusters as secondary structures.
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Synthesis of high-purity zircon, zirconia, and silica nanopowders from local zircon sand
Musyarofah,Novia Dwi Lestari,Rizka Nurlaila,Nibras Fuadi Muwwaqor,Triwikantoro,Suminar Pratapa +5 more
TL;DR: In this paper, high-purity zircon (ZrSiO4) nanopowder was successfully produced from Indonesian natural Zircon sand using a low-cost purification approach via magnetic separation, immersion in HCl, and reaction with NaOH, followed by a top-down nanosizing process using wet ball-milling for 10´h and annealing at 200´°C for 2´h.
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The characterization of mixed titanate Ba1−xSrxTiO3 phase formation from oxalate coprecipitated precursor
TL;DR: In this paper, mixed titanates Ba1−xSrxTiO3 were synthesized via calcination of oxalate coprecipitated precursors, and the transition temperature showed strong correlation with the tetragonality.
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Various Magnetic Properties of Magnetite Nanoparticles Synthesized from Iron-Sands by Coprecipitation Method at Room Temperature
TL;DR: In this paper, the morphology of magnetite nanoparticles has been evaluated by Transmission Electron Microscopy (TEM) and X-ray Diffractometer (XRD) and Vibrating Sample Magnetometer (VSM).
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Studies on Nanostructure and Magnetic Behaviors of Mn-Doped Black Iron Oxide Magnetic Fluids Synthesized from Iron Sand
Ahmad Taufiq,Sunaryono,Nurul Hidayat,Arif Hidayat,Edy Giri Rachman Putra,Atsushi Okazawa,Isao Watanabe,Norimichi Kojima,Suminar Pratapa,Darminto +9 more
TL;DR: In this article, the analysis of the small angle neutron scattering (SANS) data by applying a log-normal sphere with a mass fractal models for x = 0 and x= 0.25, and two lognormal spheres with a single fractal model for x=0.5, 0.75 and 1 revealed that the primary particles of the MnxFe3−xO4 fluids tended to decrease from 3.8nm to 1.5nm along with the increasing fraction of Mn contents.