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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Neutrino : jurnal fisika dan aplikasinya ORBITA: Jurnal Pendidikan dan Ilmu Fisika Sewagati
Mochamad Zainuri
AMIK JTC
Arts Humanities Astronomy Earth & Planetary Sciences Education Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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THE EFFECT OF TEMPERATURE VARIATION ON CONDUCTIVITY VALUE OF CATHODE LITHIUM FERRO PHOSPHATE CARBON COMPOSITE Mauliana, Metatia Intan; Zainuri, Mochamad
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p84-90

Abstract

The lithium ferrous phosphate carbon composite (LFP/C) cathode material has been successfully synthesized using solid-state reaction method by utilizing one of the natural sources of iron rocks in Tanah Laut, Kalimantan, as the base material of Fe. Solid-state reaction method was done by using high energy ball milling tool. The LFP cathode material was prepared using a base material (Li2CO3), Fe3O4, and (NH4)2HPO4 in a ratio of 3:6:2 and 5% wt. of Citric acid as a carbon source. There were some variations of calcination temperature used under inert conditions at 400 °C, 500 °C, 600 °C, and 700 °C to determine the effect on the phase structure and electrical conductivity produced by LFP/C cathode composites. Characterization of phase structure was done by using X-ray powder diffraction (XRD), while the conductivity value of the sample was tested using Electrochemical Impedance Spectroscopy (EIS). The analysis of the diffraction pattern shows the largest composition of olivine structure formed at 700 °C at 93.3% wt. with Fe2O3 impurities of 6.7% wt. The highest conductivity value of LFP/C is shown by sampling with 500 °C calcination temperature with a total conductivity value of 5,676 x 10-3 S.cm-1.
THE INFLUENCE OF SILICA CALCINATION TEMPERATURE VARIATION TO THE HYDROPHOBICITY AND TRANSMITTANCE ON GLASS SUBSTRATE Rohmah, Roihatur; Zainuri, Mochamad
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 12, No 2 (2020): April
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1297.046 KB) | DOI: 10.18860/neu.v12i2.8338

Abstract

The hydrophobic surface can be self-cleaning. The hierarchy of surface roughness affects the hydrophobic surface. In this research, the hydrophobic surface was fabricated by modification of surface roughness from the composite filler. Natural silica was used as a filler and was done a variation of calcination temperature to modify the hierarchy of roughness formed. The variation of calcination temperature was 800°C, 1000°C, 1200°C, and 1400°C. The coating method was a dip-coating method by 30-second long immersion. A glass as coating media was coated by PVDF/SiO2 composite. The hydrophobic surface could be known from the value of the water contact angle (WCA) formed. If a water contact angle more than 90°, the surface could be called the hydrophobic surface. In this research, the hydrophobicity aspect cause of variation of calcination temperature was known from the value of water contact angle formed on the surface of PVDF/SiO2 composite coating 800°C, 1000°C, 1200°C, and 1400°C was 117,12° ± 0,98°, 107,80° ± 0,91°, 121,31° ± 1,45°, and 111,75° ± 1,47°, respectively.
The Effect of Temperature Variation on Conductivity Value of Cathode Lithium Ferro Phosphate Carbon Composite Mauliana, Metatia Intan; Zainuri, Mochamad
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p84-90

Abstract

The lithium ferrous phosphate carbon composite (LFP/C) cathode material has been successfully synthesized using solid-state reaction method by utilizing one of the natural sources of iron rocks in Tanah Laut, Kalimantan, as the base material of Fe. Solid-state reaction method was done by using high energy ball milling tool. The LFP cathode material was prepared using a base material (Li2CO3), Fe3O4, and (NH4)2HPO4 in a ratio of 3:6:2 and 5% wt. of Citric acid as a carbon source. There were some variations of calcination temperature used under inert conditions at 400 °C, 500 °C, 600 °C, and 700 °C to determine the effect on the phase structure and electrical conductivity produced by LFP/C cathode composites. Characterization of phase structure was done by using X-ray powder diffraction (XRD), while the conductivity value of the sample was tested using Electrochemical Impedance Spectroscopy (EIS). The analysis of the diffraction pattern shows the largest composition of olivine structure formed at 700 °C at 93.3% wt. with Fe2O3 impurities of 6.7% wt. The highest conductivity value of LFP/C is shown by sampling with 500 °C calcination temperature with a total conductivity value of 5,676 x 10-3 S.cm-1.
ERRATUM TO: THE INFLUENCE OF SILICA CALCINATION TEMPERATURE VARIATION TO THE HYDROPHOBICITY AND TRANSMITTANCE ON GLASS SUBSTRATE Rohmah, Roihatur; Zainuri, Mochamad
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 13, No 1 (2020): October
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v13i1.11561

Abstract

Erratum: Roihatur Rohmah, M. Zainuri. Jurnal Neutrino:Jurnal Fisika dan Aplikasinya. 2020 April: 12(2):49-56. (Doi: 10.18860/neu.v12i2.8208: The title "The Influence of Silica Calcination Temperature Variation to The Hydrophobicity and Transmittance on Glass Substrate" was deleted because it is the same as the author's thesis.Therefore, the title was replaced with "Study of Hydrophobic Surface by Silica Calcination Temperature Variation."
Rancang Bangun Mesin Terintegrasi Dual Fungsi: Penanam Benih Jagung dan Penggembur Tanah untuk Meningkatkan Efisiensi Pertanian Jagung Poktan LMPSDH Wonodadi di Desa Lembeyan Wetan Asih, Retno; Nurdiansah, Haniffudin; Sudarsono; Anggoro, Diky; Mubarok, Fahmi; Zainuri, Mochamad; Pratapa, Suminar; Triwikantoro; Darminto; Suasmoro
Sewagati Vol 8 No 3 (2024)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v8i3.1047

Abstract

Kegiatan pengabdian kepada masyarakat ini dilakukan dalam rangka membantu meningkatkan efisiensi pertanian jagung petani poktan LMPSDH Wonodadi di lahan Hutan Wonodadi, Lembeyan, Magetan yang selama ini umumnya masih menggunakan cara tradisional sehingga kurang efisien dari segi tenaga, waktu dan biaya. Kegiatan dilakukan dengan merancang mesin terintegrasi antara penggembur tanah dan penanam benih yang mana bagian penanam benih dapat dibongkar apabila akan digunakan secara terpisah. Sistem dirancang dengan mesin 2-tak berbahan bakar bensin campur yang menyerupai sistem traktor-tangan mini dengan bobot sekitar 25 kg sehingga mudah dibawa dan dipindahkan melalui akses jalan hutan yang sempit dan kurang memadai. Perangkat mesin yang dirancang telah diuji cobakan di lahan Hutan Wonodadi dan diketahui bahwa mesin dapat berfungsi dengan layak. Meskipun demikian, berdasarkan hasil evaluasi dan saran dari mitra petani, beberapa perbaikan masih diperlukan terkait penempatan roda pada mesin penggembur tanah dan penggunaan material/sistem pencegah penempelan tanah pada mata lubang mesin penanam benih.
Acoustic characterization of Abaca Wool as a natural sound absorber: experimental and simulation approach Mafaz, Bilqia; Zainuri, Mochamad
ORBITA: Jurnal Pendidikan dan Ilmu Fisika Vol 11, No 1 (2025): May
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v11i1.31065

Abstract

The increasing environmental and health concerns associated with synthetic sound-absorbing materials such as rockwool and fiberglass—due to their non-biodegradable nature and potential respiratory hazards—have prompted the exploration of sustainable alternatives. This study introduces Abaca-wool, a bio-based acoustic material derived from abaca banana fibers (Musa textilis) engineered to mimic the structure of mineral wool. The research aimed to evaluate the acoustic performance of Abaca-wool through both experimental measurements and numerical simulations, while examining the influence of fiber morphology on sound absorption. The fabrication process involved alkaline treatment with 15% NaOH, followed by sequential wet and dry refining to produce a randomly entangled, porous structure. Microscopic analysis revealed micro-diameter fibers and high porosity (~93%), which are critical for enhancing viscoelastic interactions between air particles and fiber walls. Key physical parameters—density and airflow resistivity (64.117 kPa·s/m²)—were measured to support numerical modeling using AFMG SoundFlow. Experimental results using the two-microphone impedance tube method showed high absorption coefficients, peaking at 0.89 at high frequencies and 0.83 at around 1000 Hz. The observed performance is attributed to optimized fiber morphology, which facilitates energy dissipation through friction and acoustic scattering. Numerical simulations exhibited good agreement with experimental data, with minor deviations linked to the homogeneous assumptions in the model. Overall, Abaca-wool demonstrates excellent potential as a biodegradable, low-density, and high-performance acoustic material, offering a viable and environmentally responsible alternative to conventional synthetic absorbers.
Co-Authors Darminto Diky Anggoro, Diky Haniffudin Nurdiansah Mafaz, Bilqia Mauliana, Metatia Intan Mubarok, Fahmi Retno Asih, Retno Roihatur Rohmah Suasmoro Sudarsono Suminar Pratapa Triwikantoro