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Simon Sembiring
Program Studi Fisika, Universitas Lampung
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Kuantitatif Data Diffraksi Sinar X Fasa Keramik Crystoballite Berbasis Silika Sekam Padi dengan Metode Rietveld Simon Sembiring
JIEMS (Journal of Industrial Engineering and Management Systems) Vol 3, No 2 (2010): Journal of Industrial Engineering and Management Systems (JIEMS)
Publisher : Universitas Bunda Mulia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30813/jiems.v3i2.79

Abstract

Rietveld analysis is a means of revealing the detailed structure and composition of crystalline sample using x-ray powder diffraction data. This research presents the use of the Rietveld method using Rietica program to obtain the phase abundance of crystoballite crystal from rice husk sintered at 850oC, 950oC and 1100oC that has previously been demonstrated.The model parameters are refined by the methodof least squares until a good fit (2) to the observed data is obtained. The refined parameters in this study are background, scale factor, space groups, atom co-ordinates (U,V,W), preferred orientation, and the lattice parameters. The results showed that quantitative crystoballite crystal were 87.8, 89.8 and 98.4% weight, respectively. An acceptable result for estimation of lattice parameters and weightpercentage of crystoballite with reliability (2) was found to be < 4. The results also show that analysis by Rietveld method is efficient to control the quantity of crystoballite in the sintering process.Keywords: Rietveld, Rice Husk, X-Ray Diffraction
Sintesis dan Karakterisasi Fasa Crystoballite Berbasis Silika Sekam Padi dengan Metode Sintering (Solid State) Pulung Karo-Karo; Simon Sembiring
JIEMS (Journal of Industrial Engineering and Management Systems) Vol 2, No 2 (2009): Journal of Industrial Engineering and Management Systems (JIEMS)
Publisher : Universitas Bunda Mulia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30813/jiems.v2i2.66

Abstract

This study was carried out to characterize the formation of crystoballite crystall of silica extracted from rice husk by sintering. Extraction of silica using 5% KOH and 10% HCl solution was sintered at 750, 900, 1000,and 1100 C. The products were characterised in term of functional groups, microstructure and structure (FTIR, SEM and XRD). Characterisation of the silica using FTIR shows the presence of silanol and siloxane. XRD results confirmed that silica amorph was formed at 750C, through the intermediate formation of crystoballite 900, 1000, and 1100C. The formation of crystoballite structure increases with increasing temperature of sintering, which confirms the presence of regular particle size using SEM analysis.Keywords: Rice Husk, Silica, Crystoballite, FTIR, SEM and XRD
Co-Authors Pulung Karo-Karo