| 溶胶凝胶法制备莫来石纤维及莫来石晶化的动力学研究 |
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| 引用本文： | 谭宏斌,杨建锋.溶胶凝胶法制备莫来石纤维及莫来石晶化的动力学研究[J].西安交通大学学报,2009,43(11). |
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| 作者姓名： | 谭宏斌 杨建锋 |
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| 作者单位： | 1. 西安交通大学材料科学与工程学院,710049,西安;陕西理工学院材料科学与工程学院,723003,陕西汉中
2. 西安交通大学材料科学与工程学院,710049,西安 |
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| 摘 要： | 以异丙醇铝、硝酸铝和正硅酸乙脂为原料,通过溶胶凝胶法制备了可纺的莫来石前躯体溶胶,异丙醇铝和硝酸铝的最佳摩尔比为4:1.凝胶纤维在1 200℃煅烧1 h,得到了表面光滑、直径均匀的莫来石纤维.采用Kissinger方程和Ligero方程计算,得到莫来石晶化的活化能分别为993.5 kJ/mol和1 014.2 kJ/mol.
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| 关 键 词： | 莫来石 溶胶凝胶法 纤维 活化能 |
Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process |
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| TAN Hongbin,Yang Jianfeng.Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process[J].Journal of Xi'an Jiaotong University,2009,43(11). |
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| Authors: | TAN Hongbin Yang Jianfeng |
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| Abstract: | Spinnable mullite precursor sols were prepared by sol-gel process from an aqueous so-lution of aluminum nitrate, aluminum isopropoxide and tetraethylorthosilicate. A 4 : 1 molar ra-tio of aluminum isopropoxide and aluminum nitrate was optimized to obtain spinnable precursor sols for fibres synthesis. The mullite fiber was obtained with smooth surface and uniform diame-ter after calcination at 1 200℃ for one hour. The active energy of mullite crystallization is 993.5 kJ/mol and 1 014.2 kJ/mol by the calculation of Kissinger equation and Ligero equation, respec-tively. |
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| Keywords: | mullite sol-gel process fibre active energy |
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