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Budhy Kurniawan
Departemen Fisika FMIPA Universitas Indonesia Jl. Salemba Raya No. 4, Jakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Other

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Journal : Science and Technology Indonesia

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Analysis of Structure, Morphology, Magnetic Properties, and Microwave Absorption of Lanthanum Orthoferrite (LaFeO3) Naibaho, Marzuki; Widakdo, Januar; Kurniawan, Budhy; Nehan, Phahul Zhemas Zul; Vitayaya, Okvarahireka; Novita; Ramlan; Adi, Wisnu Ari; Ginting, Masno
Science and Technology Indonesia Vol. 9 No. 4 (2024): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.4.851-856

Abstract

LaFeO3 has been prepared using the solid-state reaction method with High Energy Milling (HEM). The preparation of LaFeO3 was carried out using stoichiometric calculations. Based on the XRD measurement results, single-phase LaFeO3 with an orthorhombic crystal structure was obtained. From the SEM results, the morphology of LaFeO3 is uniform, and the EDS results show the weight percentage of La, Fe, and O elements are 49.74, 21.08, and 29.18 wt%, respectively. VSM LaFeO3 results show magnetic saturation, remanence, and coercivity are 0.24 emu/g, 0.02 emu/g, and 853.38 Oe, respectively, and the absorption of LaFeO3 is -7.40 dB at a frequency of 6.02 GHz with a LaFeO3 sample thickness of 1.5mm.
Nickel Salt Dependency as Catalyst in the Plating Bath on the Film Properties of Cu/Cu-Ni Rosyidan, Cahaya; Kurniawan, Budhy; Soegijono, Bambang; Maulani, Mustamina; Samura, Lisa; Nababan, Frederik Gresia; Putra, Valentinus Galih Vidia; Susetyo, Ferry Budhi
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.529-538

Abstract

Metal plating frequently employs nickel (Ni) and copper (Cu) as anodes. Cu/ Cu-Ni film formed has many advantages, such as better corrosion resistance and high hardness characteristics. This study aims to assess the properties of Cu/Cu-Ni film, such as phase, surface morphology, crystallographic orientation, hardness, corrosion analysis, and contact angle, which were fabricated using electrodeposition with various Ni salt additions (0.3, 0.5 and 0.7 M). In addition, the cathode current efficiency (CCE) and deposition rate of the Cu/Cu-Ni electrodeposition were also investigated. An increase in Ni salt in the plating bath could enhance the pH, promoting higher CCE and depleting hydrogen evolution at the cathode, leading to the presenting Ni phase in the alloy. The higher concentration of Ni salt in the solution could also enhance the deposition rate due to a shift to a pH value, which affects the roughening of the surface morphology, promoting a higher contact angle. All crystal structures generated by Cu/Cu-Ni electrodeposition were FCC, with the preferred orientation of the (111) plane. Crystallite size and lattice strain depend on the deposition rate. Less crystallite size and lattice strain affect the film’s hardness and corrosion resistance. Moreover, the third bath had the resulting Cu-Ni layer with the best hardness and corrosion rate of around 136 HV and 0.081 mmpy.
Co-Authors - Jumaeri A. Purwanto Ade Lestari Yunus Adin Sarmawan Agung Imaduddin Agus Purwanto Agus S.W. Ahmad Jazuli Akhmad Rasyid Syahputra Andika Fajar Arif - Rachmanto Atikah, Tika Dewi Azwar Manaf Bambang P. S. Bambang Soegijono Budi Siswanto Cahaya Rosyidan Danang Eko Nuryanto Dudung A. K. Dudung Abdul Kodir Engkir Sukirman Ferry Budhi Susetyo Galuh Tresnani Handoko, Djati Hasan Fahad Hasbiyallah Hasbiyallah Herry Mugihardjo Indra Putra Siahainenia ISLAMUL HADI Iwan Sugihartono Januar Widakdo Laksanawati, Wahyu Dian Lingga Hermanto Lingga Hermanto M. Derajat Amperajaya Maharadatunkamsi Maharadatunkamsi, Maharadatunkamsi Mardyansyah, Raden Yudha Masno Ginting Maulani, Mustamina Muhammad Fikri Radiyan Muhammad Rijal Alfian Munazat, Dicky Muzadi Didik O. Nababan, Frederik Gresia Naibaho, Marzuki Nehan, Phahul Zhemas Zul Nofi Erni Novita Nunung - Nuraeni Nurlaila Mubarokah Nurul Inayah Nurul T.R Nuryanto, Danang Eko Putra, Valentinus Galih Vidia Putri, Witha Berlian R Yudha Mardyansyah Ramlan Saadah, Nelis Sadewo, Imran Samura, Lisa Santoso Soekirno Saptari, Sitti Ahmiatri Septian Rahmat Adnan, Septian Setyo Purwanto Sigit Wiantoro, Sigit Soekirno, Santoso Suhardjo Poertadji Suharno Suharno Suharno Suharno Sumarjianto Sumarjianto Supardiono, Supardiono Suryadi Suryadi Taufiqur Rachman Teguh Yoga Raksa Utami Widyaiswari Vitayaya, Okvarahireka Wahyu Rudi Hartono Wisnu Ari Adi Wisnu Ari Adi Wisnu Ari Adi Wisnu Ari Adi Y. E. Gunanto Y. E. Gunanto Yuliadi Zamroni