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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 789Structural Characterization of Mullite-Based...

Structural Characterization of Mullite-Based Ceramic Material from Al₂O₃ and Silica Xerogel Converted from Sago Waste Ash

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Abstract:

In this investigation, mullite ceramics were produced by mixing Al₂O₃ and amorphous silica xerogel (SX) extracted from sago waste ash. The composition was prepared by adding an amount from 0 to 80 mol% of Al₂O₃ into SX. The samples were dry pressed and sintered in the temperature range between 900°C and 1200°C. Their properties have been characterized on the basis of the experimental data obtained using thermal analysis (DSC/TGA, X-ray diffraction and scanning electron microscopy (SEM). The results show that two major differences become obvious when comparing the samples loaded by the smaller and larger amount of Al₂O₃. First, cristobalite formation is retarded in the sample loaded by the larger amount of Al₂O₃. Second, at 1200°C, the observed volume fraction of mullite is higher in the sample loaded by the larger amount of Al₂O₃. The DSC analysis indicates that the mullite crystallization takes place at 1200°C for 60 mol% Al₂O₃ loaded SX sample as confirmed by the XRD pattern. It was found that there was not a complete reaction of mulitization for sample sintered up to 1200°C.

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Periodical:

Advanced Materials Research (Volume 789)

Pages:

262-268

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.789.262

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Online since:

September 2013

Authors:

Haji Aripin, Seitaro Mitsudo, Endangsusilowati S. Prima, Inyoman Nyoman Sudiana, Hikamitsu Kikuchi, Saboru Sano, Sliven Sabchevski

Keywords:

Al₂O₃, Amorphous Silica Xerogel, Mullite Ceramic, Sago Waste Ash, Sintering Temperature, Thermal Analysis, X-Ray Methods

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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