SEMBIRING, SIMON and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2017) Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4)) Precursors Characteristics Derived from Amorphous Rice Husk Silica. ORIENTAL JOURNAL OF CHEMISTRY, 33 (4). pp. 1828-1836. ISSN 0970-020 X

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Abstract

This study acquires the potential of rice husk silica for production forsterite precursors using sol-gel method. The samples preparation were conducted by mixing magnesium oxide sol fromMg(NO3)2.6.12HO with silica sol extracted from rice husk, with three different composition ratios ofMgO to SiO22 are 1:1, 2:3 and 3:2 by weight and sintered at 900 C. The samples were characterized using Fourier transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD),differential thermal analysis (DTA), followed by scanning electron microscopy (SEM). The FTIR results showed the presence of Si-O-Si, Mg-O and Mg-O-Si functional groups, which were associated with forsterite, enstatite, cristobalite and periclase, according to the XRD analysis. The formation of forsterite (Mg2SiO4o) is composition-dependent as revealed the increase of forsterite intensity after sintered at 900 C in ratio 3:2. The surface morphology of non-sintered samples shows that particle and grain size were larger than particle and grain size of sintered samples. Also, SEM analysis of sintered samples clearly shows the presence of regular particle size with smaller grain size was found in ratioof MgO to SiO2 is 3:2. DTA analysis revealed that the formation of forsterite increased with increasingtemperature. In addition, the electrical resistivities of the samples were found in the range of 0.75 x 1013 -cm to 3.30 x 1013 -cm, demonstrating that the samples exhibit good potential as isolator.

Item Type:	Article
Subjects:	Q Science > QC Physics
Divisions:	Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Fisika
Depositing User:	SIMON SEMB
Date Deposited:	02 Nov 2017 02:09
Last Modified:	02 Nov 2017 02:09
URI:	http://repository.lppm.unila.ac.id/id/eprint/4066

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