کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1459857 | 989598 | 2015 | 10 صفحه PDF | دانلود رایگان |
In this study, we investigate mullite containing ceramics prepared from alumina (α-Al2O3) and silica xerogel converted from sago waste ash. The silica xerogel was ground and then mixed with a varying content of α-Al2O3. The measurements were performed on cylindrical samples sintered at temperatures ranging from 900 °C to 1700 °C. In order to understand the mullitization process and structure formation a series of analyses were carried out using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, thermo-gravimetric analysis (TGA) and a differential scanning calorimetry (DSC). The results show that the mullite phase can be formed at a temperature as low as 1100 °C. It was found that a complete mullitization takes place for the composition of 40 mol% α-Al2O3 sintered at 1600 °C.
Journal: Ceramics International - Volume 41, Issue 5, Part A, June 2015, Pages 6488–6497