Firdausi, Muhammad Nirwan (2021) Analisis Struktur Pada Sistem Silika-Zirkonia Menggunakan Difraksi Sinar-X (XRD) Dan X-Ray Absorption Spectroscopy (XAS). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Salah satu hal menarik dari struktur campuran silika-zirkonia (SiO2-ZrO2) adalah bergantung pada jenis fasa bahan dasar, metode reaksi yang digunakan serta perlakuan panas yang diberikan. Pada penelitian ini penulis melanjutkan studi yang telah dilakukan oleh Musyarofah dkk (2019), yaitu analisis struktur kristal dan struktur lokal dalam sistem silika-zirkonia sebagai akibat dari penggunaan bahan dasar polimorf serta temperatur kalsinasi. Struktur kristal dianalisis dengan metode X-Ray Diffraction (XRD). Struktur lokal dianalisis dengan metode X-Ray Absorption Scattering (XAS) yang meliputi XANES (X-ray Absorption Near Edge Structure) Si K-edge dan Zr L3-edge serta EXAFS (Extended X-Ray Absorption Fine Structure). Hasil analisis XRD menunjukkan terbentuk fasa zirkon untuk semua variasi sampel pada temperatur kalsinasi 1000 °C. Komposisi fasa zirkon tertinggi (83,4 %mol) didapat pada sampel ZrO2 amorf-SiO2 amorf pada temperatur kalsinasi 1200 °C. Hasil analisis XAS menunjukkan bahwa ada perubahan struktur lokal Si ditunjukkan dengan munculnya puncak tambahan pada energi sekitar 1844 eV serta perubahan spektrum ruang-R EXAFS. Selain itu terjadi perubahan struktur lokal Zr ditunjukkan dengan mengecilnya puncak pada energi 2227 eV.
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One of the interesting issues about the structure of the silica-zirconia mixture (SiO2-ZrO2) is that it depends on the type of raw material phase, the reaction method used and the heat treatment applied. In this study, the authors continue the study conducted by Musyarofah et al (2019), namely the analysis of crystal structure and local structure in the silica-zirconia system as a result of the use of polymorphic base materials and the calcination temperature. The crystal structure was analyzed by X-Ray Diffraction (XRD) method. The local structure was analyzed by the X-Ray Absorption Scattering (XAS) method which included XANES (X-ray Absorption Near Edge Structure) Si K-edge and Zr L3-edge and EXAFS (Extended X-Ray Absorption Fine Structure). The results of XRD analysis showed that a zircon phase was formed for all sample variations at a calcination temperature of 1000 °C. The highest zircon phase composition (83.4% mol%) was obtained from amorphous ZrO2-SiO2 amorphous samples at a calcination temperature of 1200 °C. The results of the XAS analysis showed that there was a change in the local structure of Si indicated by the appearance of an additional peak at an energy of around 1844 eV and a change in the EXAFS R-space spectrum. In addition, there was a change in the local structure of Zr as indicated by the shrinking of the peak at 2227 eV energy.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | silika, zirkonia, struktur kristal, struktur lokal,silica, zirconia, crystal structure, local structure |
| Subjects: | Q Science > QC Physics > QC100 Crystals. Q Science > QC Physics > QC 611.97.T46 Temperature effects. Including transition temperature |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Nirwan Firdausi |
| Date Deposited: | 23 Aug 2021 07:32 |
| Last Modified: | 04 Jun 2024 03:34 |
| URI: | http://repository.its.ac.id/id/eprint/88959 |
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