Synthesis Of Mullite Whiskers Using Salt Flux Method
CHINESE JOURNAL OF INORGANIC CHEMISTRY(2005)
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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