Abstract
Using SiO2 and Al2O3 as raw materials, mullite whiskers were prepared by heating at 1 200°C for 4 h in potassium sulfate flux. The morphology, crystalline characteristics, compositions and growth direction of whiskers were investigated by means of XRD, SEM, EDS and TEM. The results indicate that the as-synthesized whiskers are about 4 μm in length and 0.5-1 μm in diameter, and mullite whiskers grow along c-axis direction ([001] direction). The formation of mullite whiskers is controlled by dissolution-precipitation reactions, and the salt flux method is a good way to grow mullite whiskers.
Original language | English |
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Pages (from-to) | 277-280 |
Number of pages | 4 |
Journal | Chinese Journal of Inorganic Chemistry |
Volume | 21 |
Issue number | 2 |
Publication status | Published - 1 Feb 2005 |
Keywords
- Growth mechanism
- Mullite
- Salt flux
- Whisker