Sembiring, Simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Sebayang, Kerista (2016) EFEK PENAMBAHAN ALUMINA PADA KARAKTERISTIK MIKROSTRUKTUR DAN FISIS CORDIERITE DARI SILIKA AMORPH SEKAM PADI. In: SEMINAR NASIONAL KIMIA ( SNK ) 2016, 10 - 11 Agustus 2016, Mataram.
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Abstract
This study aims to investigate the effect of alumina addition on the microstructure and physical characteristics of cordierite prepared from rice husk silica, Al2O3, and MgO powders. The samples without and with alumina addition of 5, 10, 15 and 20% were prepared and subjected to sintering temperature of 1230 oC and the structures were characterised using X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results obtained indicated the significant role of alumina addition on the phase decomposition of cordierite into alumina, spinel, crystoballite and periclase, in which at alumina addition of 10-20% the cordierite is practically disappeared, while alumina, spinel and crystoballite emerged as dominant phases. Formation of alumina and spinel was followed by increase in density, porosity, and thermal conductivity, while for electrical conductivity the opposite was true.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Kimia |
| Depositing User: | Agus Riyanto |
| Date Deposited: | 31 May 2017 06:20 |
| Last Modified: | 31 May 2017 06:20 |
| URI: | http://repository.lppm.unila.ac.id/id/eprint/2268 |
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