Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (8): 122-126.

• Materials Science & Technology • Previous Articles     Next Articles

Synthesis of Mullite with Al13 and Aluminum Chloride as Aluminium Sources

Zhang Zhi-jie  Zhong Ming-feng   

  1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-12-16 Revised:2009-02-24 Online:2009-08-25 Published:2009-08-25
  • Contact: 张志杰（1970-），男，博士，副教授，主要从事生态环境材料研究． E-mail:imzhang@scut．edu．cn
  • About author:张志杰（1970-），男，博士，副教授，主要从事生态环境材料研究．
  • Supported by:

    广东省科技计划项目（2008A030202006）

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Abstract:

:Mullite was synthesized with [ AlO4Al12（OH）24（H2O）12] 7＋ （ abbreviated to Al13 ） or aluminum chloride as the aluminium source and with sodium silicate or activated silicic acid as the silicon source, respectively. And, the synthesis process and material microstructure evolvement were investigated by means of 27Al NMR, XRD and infrared absorption spectroscopy. The results indicate that  the synthesis of mullite with Al13 as the aluminum source can perform at lower temperature;  after the sintering at 900 ℃ and 1 200 ℃, the mullite precursor prepared with Al13 and activated silicic acid transforms respectively into mullite and single-phase mullite, because of the Si-O-Al bonds formed in the mullite-like precursor.

Key words: Al13, aluminum chloride, mullite, low-temperature synthesis