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2010 , Vol. 25 >Issue 5: 532 - 536

DOI: https://doi.org/10.3724/SP.J.1077.2010.00532

研究论文

非水解溶胶-凝胶法制备莫来石晶须

  • 江伟辉1 ,
  • 2 ,
  • 彭永烽1 ,
  • 刘健敏1 ,
  • 冯 果1 ,
  • 谭训彦1 ,
  • 于 云2
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  • 1.景德镇陶瓷学院 材料科学与工程学院, 景德镇 333001; 2. 中国科学院 上海硅酸盐研究所 特种无机涂层重点实验室, 上海 200050

收稿日期: 2009-06-11

  修回日期: 2009-11-26

  网络出版日期: 2010-05-12

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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
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  • 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

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摘要

以正硅酸乙酯和无水氯化铝为前驱体, 乙醚为氧供体, 采用非水解溶胶凝胶法制备了直径为0.2~20μm, 长径比高达60~70的莫来石晶须. 借助XRD、SEM和TEM等测试手段研究了莫来石干凝胶粉的活性、矿化剂氟化铝引入方式及其用量、成型压力以及煅烧温度等工艺参数对合成莫来石晶须的影响. 结果表明：采用恒压回流工艺制备的莫来石干凝胶粉, 在12MPa压力下压制成片状, 以外置方式引入3wt%的氟化铝, 在1200℃保温1h可制备质量较好的莫来石晶须.

关键词： 非水解溶胶-凝胶法; 莫来石; 晶须; 长径比

本文引用格式

江伟辉1 , 2 , 彭永烽1 , 刘健敏1 , 冯 果1 , 谭训彦1 , 于 云2 . 非水解溶胶-凝胶法制备莫来石晶须[J]. 无机材料学报, 2010 , 25(5) : 532 -536 . DOI: 10.3724/SP.J.1077.2010.00532

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.

Key words： non-hydrolytic Sol-Gel route; mullite; whisker; aspect ratio

参考文献

[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.
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