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All Journal JFA (Jurnal Fisika dan Aplikasinya) Jurnal Teori dan Aplikasi Fisika
Sembiring, Simon
Universitas Lampung
Materials Science & Nanotechnology Physics

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Pengaruh Suhu Tinggi terhadap Karakteristik Keramik Cordierite Berbasis Silika Sekam Padi Sembiring, Simon; Manurung, Posman; Karo-Karo, Pulung
Jurnal Fisika dan Aplikasinya Vol 5, No 1 (2009)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.746 KB) | DOI: 10.12962/j24604682.v5i1.933

Abstract

This study was carried out to investigate the effect of high temperature on the functional groups, microstructure and physical characteristics of cordierite ceramics obtained from an aqueous solution of magnesium nitrate hydrate ((Mg(NO3)2.6.12H2O)), aluminium nitrate hydrate (Al(NO3)2.9.15H2O) and silica sols extracted from rice husk. The samples were sintered at temperature of 1000â—¦C, 1200â—¦C and 1400â—¦C. Functional groups and microstructural characteristics of cordierite ceramics were examined by FTIR and SEM, respectivelly. FTIR study shows that the absence of the vibration bands of Na-OH, Si-OH, C-O, Si-O-Si on the samples. However, the formation of cordierite structure was dominated on this high temperature. Microstructure results confirmed the presence of irregular morphology of the solid and compact phases. In addition, the densities, shrinkage andhardness of cordierite increase significantly with increasing temperature, but porosity decreases with increasingtemperature.
Karakteristik Fungsional Dan Sifat Fisis Aspal Akibat Penambahan Silika Sekam Padi Isma, Siti; Sembiring, Simon; Simanjuntak, Wasimton
Jurnal Teori dan Aplikasi Fisika Vol 7, No 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.1928

Abstract

This study was conducted to determine the functional characteristics and physical properties of asphalt due to the addition of silica rice husk. Asphalt penetration 60/70 was combined with silica sourced from extracted rice husks using the sol gel method with 1.5% NaOH solvent and 10% HNO3 solvent. Comparison of asphalt and silica masses is 1: 1.8; 1: 1,9; and 1: 2, then asphalt and silica alloys are heated at 110oC for 4 hours. The results of Fourier Transform Infra-Red (FTIR) analysis showed that the O-H group was formed after the addition of silica. The functional groups seen are functional groups associated with asphalt and silica that is C-H, Si-OH, Si-O-Si, and Si-O. The results of swelling thickness and degradation physical tests (diameter, thickness, and volume) indicate that this material is quite stable. In each addition of silica the increase in increment occurs only slightly. This proves that the interaction between asphalt and silica that occurs physically and does not occur in a chemical reaction.
Co-Authors Isma, Siti Posman Manurung Pulung Karo-Karo Simanjuntak, Wasimton