通过溶胶-凝胶法制备了高纯超细莫来石先驱体。并运用XRD和IR等手段对其晶化行为进行了研究。发现新制备的莫来石凝胶由拜耳石(Al(OH)3)和无定型氧化硅组成，它经由γ-A12O3和铝硅尖晶石，在1250℃转化为莫来石。所得到的莫来石粉体晶粒细小，呈薄片状。
Superfine Al2Os-SiO2 gel of mullite composition was prepared by a sol-gel method, using TEOS and aluminium chloride hexahydrates as starting materials. Its mullitization process was monitored by DTA, XRD and IR measurements. The as-received gel is a diphasic one, comprising of bayerite and amorphous silica. By going through transition phases of γ-A12O3 and Al-Si spinel, this gel transforms to mullite at 1250℃. The mullite powder obtained has a very fine grain size and shows a plate-like morphology.
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