With the aim of preparing mullite, reactions between aluminum sulfate and silica in appropriate proportions and molten sulfate media M2SO4 (M=Na and/or K) were performed at different temperatures. The powders obtained were characterized by XRD, FT-IR, SEM and TEM. The reactivity was the same in Na2SO4 and (K,Na)2SO4 media. The best results in terms of yield (98.3%) and weight of mullite produced (95%) were obtained in Na2SO4 at 950 °C. The mullite phase exhibits an acicular morphology (75×0.75 μm) and a specific surface area close to 20 m2/g. In K2SO4 medium, a potassium alumino silicate is formed as well as mullite.
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机译：为了制备莫来石，在不同的温度下进行了适当比例的硫酸铝和二氧化硅与熔融硫酸盐介质M 2 SO 4（M ＝ Na和/或K）之间的反应。通过XRD，FT-IR，SEM和TEM对获得的粉末进行表征。在Na2SO4和（K，Na）2SO4培养基中，反应性相同。在950°C的Na2SO4中，就产率（98.3％）和生产的莫来石重量（95％）而言，最好的结果是。莫来石相表现出针状形态（75×0.75μm）和比表面积接近20m2 / g。在K2SO4介质中，形成了铝硅酸钾以及莫来石。
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