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ANALISIS X-RAY FLOURESENCE DAN X-RAY DIFFRACTION MINERAL PASIR DAN BATU BESI INDONESIA SEBAGAI MATERIAL MAGNETIK Husain Husain; Yana Taryana; Wisnu Ari Adi; Nurhayati Nurhayati; Muhammad Saleh; Nurmala Dewi
Jurnal Sains dan Pendidikan Fisika Vol 20, No 1 (2024): JURNAL SAINS DAN PENDIDIKAN FISIKA
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jspf.v20i1.53907

Abstract

Penelitian ini bertujuan untuk mengetahui karakteristik kimia dan fisis mineral batu dan pasir besi di Indonesia. Sampel batu besi dalam penelitian ini diperoleh dari Kalimantan sedangkan sampel pasir besi diperoleh dari Pasir Pantai Takalar. Pengujian XRF (X-ray Flouresence) dan X-ray diffraction dikombinasikan untuk mengetahui unsur penyusun dan struktur kristal kedua sampel. Proses separasi magnetik menggunakan hard permanent magnetic dilakukan untuk memisahkan unsur magnetik dan non-magnetik sampel untuk selanjutnya dilakukan pengujian XRF dan XRD. Hasil pengujian dan analisis menunjukkan bahwa unsur dominan penyusun sampel adalah Fe (besi). Kandungan Fe pada batu dan pasir besi masing-masing adalah sekitar 76 dan 43 %. Sedangkan hasil pengujian XRD menunjukkan bahwa fase dominan kedua sampel adalah Fe3O4 (magnetite) dan Fe2O3 (hematite). Hasil penelitian ini mengimplikasikan bahwa batu dan pasir besi dapat dijadikan sebagai sumber material untuk aplikasi material magnetik karena memiliki unsur dominan Fe dan senyawa besi oksida seperti magnetite.
A-Site Doped in Perovskite La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 (x = 0, 0.1, and 0.3) for Absorbing Microwave Material Sitti Ahmiatri Saptari; Dinda Hapitanur; Yana Taryana; Nanang Sudrajat; Ikhwan Nur Rahman; Dwi Nanto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 13 No. 2 (2023)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v13n2.p106-118

Abstract

Microwave radiation can have harmful effects on our bodies. With increased exposure due to online activities, it is essential to use absorber materials like perovskite manganate to reduce radiation. In this study, perovskite manganate La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 (x = 0, 0.1, and 0.3) was synthesized using the sol-gel method. X-ray diffraction (XRD) analysis revealed that the two samples were multi-phased, LaMnO3 and La2Ti2O7, and were formed, exhibiting a rhombohedral crystal structure (R -3 c). Morphological characterization of the sample surface using a Scanning Electron Microscope (SEM) showed that as doping increases, the grain size decreases from 282.02 to 245.63 nm at x=0 and x=0.3, respectively. This result implies that doping leads to more uniform grain distribution and enhanced grain refinement. Characterization via Vibrating Sample Magnetometer (VSM) revealed that the maximum saturation value, 0.79 emu/g, was attained when x = 0. This sample exhibits soft magnetic properties, as evidenced by its coercivity (Hc) value of < 1kOe. Results from the Vector Network Analyzer (VNA) indicate that the absorption capacity of La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 increases, with a maximum reflection loss value of -25.5 dB with 1.5 mm thickness. Consequently, La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 demonstrates potential as a microwave absorber material.
Co-Authors Dinda Hapitanur Dwi Nanto Husain Husain Ikhwan Nur Rahman Nanang Sudrajat Nurhayati Nurhayati Nurmala Dewi Saptari, Sitti Ahmiatri Wisnu Ari Adi