Grain-Size Characteristics of Mullite Nanocomposites Prepared by Open-System Hydrothermal Crystallization Method
In this research, raw kaolin is processed by oxidation-reduction fining method and then baked to produce mullite precursor, which can prepared multi-phase mullite nanocrystals at low temperature hydrothermal conditions under normal pressure. According to the analysis of the controlling factors of NaOH mole ratio in the hydrothermal system, reaction temperature, holding time and the precursor concentration, etc., we studied the effect of above-mentioned factors on the grain size of product. The results show that when NaOH concentration 3mol/L, hydrothermal reaction temperature 80°C, holding time 3 h, precursor concentration 0.15g/ml, the morphology of the prepared nanocomposite with grains size of 60 ~ 90nm appears spherical-like, also the uniform dispersion can be acquired.
Wei Pan and Jianghong Gong
N. C. Chen et al., "Grain-Size Characteristics of Mullite Nanocomposites Prepared by Open-System Hydrothermal Crystallization Method", Advanced Materials Research, Vols. 105-106, pp. 729-732, 2010