Synthesis Of Mullite Whiskers Using Salt Flux Method

CHINESE JOURNAL OF INORGANIC CHEMISTRY(2005)

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摘要
Using SiO2 and Al2O3, as raw materials, mullite whiskers were prepared by heating at 1200 degreesC 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 mum in length and 0.5similar to1 mum 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.
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关键词
mullite,salt flux,whisker,growth mechanism
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