Activation energy for mullitization of gel fibres obtained from aluminum isopropoxide

作者：Tan, Hongbin^*; Ding, Yaping; Zhang, Haihong; Yang, Jianfeng; Qiao, Guanjun

来源：Bulletin of Materials Science, 2012, 35(5): 833-837.

DOI：10.1007/s12034-012-0368-5

• Mullite
• fibres
• sol-gel method
• activation energy

Gel fibres of mullite precursor were prepared from an aqueous solution of aluminum nitrate (AN), aluminum isopropoxide (AIP) and tetraethylorthosilicate (TEOS). A 4:1 molar ratio of aluminum isopropoxide and aluminum nitrate was optimized to obtain spinnable precursor sol for synthesis of fibres. Thermogravimetry-differential scanning calorimetry (TG-DSC), Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) analyses were used to characterize properties of the gel and ceramic fibres. The precursor gel completely transformed to mullite at 1200 A degrees C. The activation energy of mullite crystallization was 993 center dot 5 kJ/mol by the Kissinger equation.

• 出版日期2012-10
• 单位陕西理工大学; 西安交通大学