Abstract
Silica can be found in rice husk. The objective of this paper to investigate the composition of silica from the combustion of the rice husk. To get the silica, the rice husk was thoroughly washed and went for a chemical treatment. Then, the firing rice husk took place at temperature of 1000 °C for 2 h. This sample was studied and omit named as a C3. Then, this sample was compared to the original rice husk that has not been fired and has undergone to chemical treatment. The characteristics of material in both samples can be obtained by using Scanning electron microscopy (SEM) and x-ray diffractometer (XRD). The SEM for an original rice husk showed that the surface of the material was uneven, highly roughened and ridged while omit the C3 sample showed the crystallize shape has been formed. The properties of both materials have been showed more specifically by using XRD. The result showed that the silica contained in original rice husk was 67.1% and C3 was 98.7%. Thermogravimetric analysis (TGA) was only tested on sample C3 where the result showed the energy of organic compound lost was at 1000 °C was 0.00217 mg/min.
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