Research Paper

Preparation of Mullite Whisker via Non-hydrolytic Sol-Gel Route

  • JIANG Wei-Hui-1 ,
  • 2 ,
  • BANG Yong-Feng-1 ,
  • LIU Jian-Min-1 ,
  • FENG Guan-1 ,
  • TAN Xun-Pan-1 ,
  • XU Yun-2
Expand
  • 1. School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China; 2. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received date: 2009-06-11

  Revised date: 2009-11-26

  Online published: 2010-05-12

Abstract

Mullite whisker was prepared via nonhydrolytic Sol-Gel route using tetraethoxysilane and anhydrous aluminium chloride as precursors and ether as oxygen donor.The prepared mullite whisker is 0.2-2.0μm in diameter, with aspect ratio of 60-70. Effects of processing parameters on the mullite whisker were also studied by means of XRD, SEM and TEM, including activity of mullite xerogel, addition way and amount of mineralizer AlF3, forming pressure and calcining temperature. The results indicate that the mullite xerogel prepared by the constant pressure reflux, transforms into the whisker with high yield and good quality after being shaped into disc at the pressure of 12MPa and calcined at 1200℃ for 1h with outside addition of 3wt% AlF3.

Cite this article

JIANG Wei-Hui-1 , 2 , BANG Yong-Feng-1 , LIU Jian-Min-1 , FENG Guan-1 , TAN Xun-Pan-1 , XU Yun-2 . Preparation of Mullite Whisker via Non-hydrolytic Sol-Gel Route[J]. Journal of Inorganic Materials, 2010 , 25(5) : 532 -536 . DOI: 10.3724/SP.J.1077.2010.00532

References

[1]王洪彬, 张玉军, 张 敏. 莫来石晶须研究进展. 山东轻工业学院学报, 2005, 19(4): 94-97.
[2]Park Y M, Yoon S Y, Stevens R, et al. Mullite whiskers derived from coal fly ash. Mater. Sci. Eng. A, 2007, 454455: 518-522.
[3]Hashimoto Shinobu, Yamaguchi Akira. Synthesis of needlelike mullite particles using potassium sulfate flux.J. Eur. Ceram. Soc,2000, 20(4):397-402
[4]Okada K, Otsuka N. Synthesis of mullite whiskers by vapour-phase reaction.J. Mater. Sci. Lett,1989, 8(9):1052-1054
[5]Ismail M, Arai H, Nakai Z, et al. Mullite whiskers from precursor gel powders.J. Am. Ceram. Soc,1990, 73(9):2736-2739
[6]Niederberger M, Garnweitner G. Organic reaction pathways in the nonaqueous synthesis of metal oxide nanoparticles.Chem. Eur. J,2006, 12(28):7282-7302
[7]李 武. 无机晶须. 北京: 化学工业出版社, 2005: 4-5.
[8]Hong S H, Messing G L. Anisotropic grain growth in diphasic gel derived titaniadoped mullite. J. Am. Ceram. Soc., 1998, 81(5): 1269-1277.

Outlines

/