Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process

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Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process

更新时间：2025-07-09

- Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process
- Vol. 43, Issue 11, Pages: 43-46+94(2009)
- 作者机构：
  
  1. 西安交通大学材料科学与工程学院,西安,710049
  2. 陕西理工学院材料科学与工程学院,陕西,汉中,723003
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB321
- Online First：10 November 2009，
  
  Published：2009
- 稿件说明：
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Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process[J]. 2009, 43(11): 43-46+94.
DOI：

Preparation and Mullitization Kinetics of Mullite Fibres via Sol-Gel Process[J]. 2009, 43(11): 43-46+94. DOI：

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.

Abstract

Spinnable mullite precursor sols were prepared by sol-gel process from an aqueous solution of aluminum nitrate

aluminum isopropoxide and tetraethylorthosilicate. A 4:1 molar ratio 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 diameter 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

respectively.

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references

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