Effects of Si/Al Molar Ratio on Morphology of Mullite Nanocomposite Synthesized from Kaolin
Mullite nanocomposite was synthesized using kaolin with different Si/Al molar ratios in the range of 1.1- 4.31. The synthesized samples were analyzed and characterized using XRD and SEM techniques and effects of Si/Al molar ratio on mullite nanocrystal morphology have been investigated. SEM results showed that the mullite nanocomposite synthesized from kaolin with different Si/Al molar ratios had different morphologies and distribution patterns of particle size. It was found that the mullite nanocrystals with relatively homogenous grain-size distribution, low aspect ratio, and little agglomeration were produced from the precursors made from kaolin with a Si/Al ratio of 1.1-2.33 at calcination temperature of 1100-1250 oC.
Jing Tao Wang
N. C. Chen et al., "Effects of Si/Al Molar Ratio on Morphology of Mullite Nanocomposite Synthesized from Kaolin", Materials Science Forum, Vol. 682, pp. 55-59, 2011