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熔盐法合成莫来石晶须 总被引:10,自引:0,他引:10
Using SiO2 and Al2O3 as raw materials, mullite whiskers were prepared by heating at 1 200 ℃ 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. 相似文献
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