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Effect of aluminium sulphate on phase formation and morphology development of mullite whiskers

Published online by Cambridge University Press:  09 July 2018

Hongbin Tan
Hongbin Tan*
Affiliation:
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, People's Republic of China
*
*E-mail: [email protected]
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Abstract

Well developed mullite whiskers were obtained by heating compacts of kaolin and 2 wt.% sodium pyrophosphate powder at 1350ºC for 10 h, with or without a small addition of aluminium sulphate. Without aluminium sulphate, mullite whiskers were obtained with an aspect ratio of >8 and reasonably uniform diameter (~0.05–0.3 μm). When aluminium sulphate additions were employed a mass of relatively well developed and interlocked whisker-shaped crystals were produced, with an aspect ratio of >10 (~0.05–0.3 μm in diameter). Larger whiskers were also observed, with aspect ratio of >25 (~0.2–0.5 μm in diameter).

Keywords

mullitewhiskerskaolinmorphology developmentaluminium sulphate
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 3 , September 2010 , pp. 349 - 352
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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References

Esther, R.S., Francisco, J.S., Estefania, D.-P., Maria, M.R., Pardo, A.I., Kojdecki, M.A., Amigo, J.M. & Alarcon, J. (2007) Solubility and microstructural development of TiO2-containing 3Al2O3-2SiO2 and 2Al2O3-SiO2 mullites obtained from single-phase gel. Journal of the European Ceramic Society, 27, 2647–2654.Google Scholar
Kong, L.B., Huang, H., Zhang, T.S., Gan, Y.B., Ma, J., Boey, F. & Zhang, R.F. (2003) Effect of transition metal oxides on mullite whisker formation from mechanochemically activated powders. Materials Science and Engineering A, 359, 75–81.Google Scholar
Kong, L.B., Chen, Y.Z., Zhang, T.S., Ma, J., Boey, F. & Huang, H. (2004) Effect of alkaline-earth oxides on phase formation and morphology development of mullite ceramics. Ceramics Internet, 30, 1319–1323.Google Scholar
Moyer, J.R. & Hughes, N.N. (1994) A catalytic process for mullite whiskers. Journal of the American Ceramic Society, 77,1083-1086.CrossRefGoogle Scholar
Moyer, J.R. & Rudolf, P.R. (1994) Stoichiometry of fluorotopaz and of mullite made from fluorotopaz. Journal of the American Ceramic Society, 77, 1087–1089.CrossRefGoogle Scholar
Park, Y.M., Yang, T.Y., Yoon, S.Y., Stevens, R. & Park, H.C. (2007) Mullite whiskers derived from coal fly ash. Materials Science and Engineering A, 454-455, 518–522.Google Scholar
Peng, P. & Sorrell, C. (2004) Preparation of mullite whiskers from topaz decomposition. Materials Letters, 58, 1288–1291.Google Scholar
Schneider, H., Schreuer, J. & Hildmann, B. (2008) Structure and properties of mulliteua review. Journal of the European Ceramic Society, 28, 329–344.Google Scholar
Yoon, W., Sarin, P. & Kriven, W.M. (2008) Growth of textured mullite fibers using a quadrupole lamp furnace. Journal of the European Ceramic Society, 28, 455–463.Google Scholar