Riyanto, Agus and Suprihatin, Suprihatin and Syafriadi, Syafriadi and Sembiring, Simon (2022) EFFECT OF THERMAL TREATMENT ON THE PHASE FORMATION AND ELECTRICAL PROPERTIES OF RICE HUSK SILICA BASED Na2FeSiO4 PRECURSORS. Ceramics-Silikáty, 66 (1). pp. 95-103. ISSN 0862-5468

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Abstract

This study aimed to explore the effect of thermal treatments on the phase composition and electrical properties of an Na2FeSiO4 precursor. Samples were prepared from NaOH, Fe(NO3)3·9H2O, rice husk silica, and C6H8O7·H2O using the sol-gel method. The samples were thermally treated at a temperature range of 350 – 475 °C with a holding time of 10 hours. The functional groups of each sample were identified using Fourier transform infrared (FTIR) spectroscopy, and their phases were identified using x-ray diffraction (XRD) coupled with a qualitative and quantitative analysis. Meanwhile, the band gap and electrical conductivity of each sample were characterised using UV-Vis DRS and LCRmeter, respectively. The FTIR spectrum identified the functional groups of Na-O, Fe-O, and Si-O, which are associated with the tetrahedral structure of NaO4, FeO4, and SiO4. The XRD analysis reveals that the samples were dominated by Na2FeSiO4, followed by FeSiO3 and SiO2. The weight percent (wt. %) and unit cell volume of the Na2FeSiO4 phase tend to increase with an increasing temperature and change in both influences of their band gap and electrical conductivity. The band gap value tends to decrease with an increasing temperature, inversely proportional to the wt. % and unit cell volume, however, the electrical conductivity is opposite to their band gap value.

Item Type:	Article
Subjects:	Q Science > QC Physics
Divisions:	Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Fisika
Depositing User:	Agus Riyanto
Date Deposited:	09 Jun 2022 05:42
Last Modified:	09 Jun 2022 05:42
URI:	http://repository.lppm.unila.ac.id/id/eprint/42252

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