| Novel Synthesis of Sol-gel Derived Nanosized Mullite Powder |
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| 作者姓名： | LIANG Long* LI Jian-bao LIN Hong GUO Gang-feng HE Ming-sheng State Key Lab of New Ceramics and Fine Processing Dept of Materials Science and Engi-neering Tsinghua University Beijing China |
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| 作者单位： | LIANG Long*，LI Jian-bao，LIN Hong，GUO Gang-feng，HE Ming-sheng State Key Lab of New Ceramics and Fine Processing，Dept of Materials Science and Engi-neering，Tsinghua University，Beijing 100084，China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | Using hydrous aluminum chloride (AlCl3·6H2O) and silicon ethoxide (Si (OC2H5)4) as raw materials, a kind of nano-sized mullite powder was synthesized with the sol-gel process at the medium calcination temperature. The microstructures of the alumina-silica binary aerogel and calcined nano-sized materials were investigated by means of thermogravimetry-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The results show that the mullitization of Al2O3-SiO2 in gel starts from about 1 000 ℃ and its formation of mullite takes place in the range of 1 100 ℃-1 250 ℃. The size of the nano-sized mullite pow-der calcined at 1 250 ℃ is measured to be about 30 nm.
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Novel Synthesis of Sol-gel Derived Nanosized Mullite Powder |
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| LIANG Long*,LI Jian-bao,LIN Hong,GUO Gang-feng,HE Ming-sheng State Key Lab of New Ceramics and Fine Processing,Dept of Materials Science and Engi-neering,Tsinghua University,Beijing ,China.Novel Synthesis of Sol-gel Derived Nanosized Mullite Powder[J].Chinese Journal of Aeronautics,2006,19(Z1). |
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| Authors: | LIANG Long LI Jian-bao LIN Hong GUO Gang-feng HE Ming-sheng |
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| Abstract: | Using hydrous aluminum chloride (AlCl3 6H2O) and silicon ethoxide (Si (OC2H5)4) as raw materials, a kind of nano-sized mullite powder was synthesized with the sol-gel process at the medium calcination temperature. The microstructures of the alumina-silica binary aerogel and calcined nano-sized materials were investigated by means of thermogravimetry-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The results show that the mullitization of Al2O3-SiO2 in gel starts from about 1 000 ℃ and its formation of mullite takes place in the range of 1 100 ℃-1 250 ℃. The size of the nano-sized mullite powder calcined at 1 250 ℃ is measured to be about 30 nm. |
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| Keywords: | mullite sol-gel synthesis temperature |
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