利用水热法制备了具有类蛭石结构的纳米层状硅酸盐材料,研究了反应温度、反应时间及硅源对材料结构及形貌的影响规律。研究结果表明,反应温度对类蛭石纳米层状硅酸盐材料的结构影响较大,随着反应温度的升高,材料的结晶程度越来越高,当温度升高到340℃时,材料出现分层现象并产生水合铝硅酸钠杂质；随着反应时间的延长,材料的结晶程度得到提高,片层尺寸逐渐增大,但是当反应时间延长到36 h,材料中开始出现杂质；硅源对材料的结构影响较小,但是对其晶体结晶程度影响较大。通过实验分析得出最佳反应温度为300℃,最佳反应时间为24 h,最佳硅源为气相法二氧化硅。
Vermiculite-like layered silicate has been synthesized by hydrothermal method, the effects of reaction temperature, reaction time and silicon source on the structure and morphology have been investigated. The reaction temperature has an important influence on the structure of materials; the degree of crystallinity has been significantly improved as the reaction temperature increases. When temperature is increased to 340 ℃, there are stratification and impurities of Sodium Aluminium Silicate Hydrate in samples. The degree of crystallinity improves and the size of lamina increases with increasing the reaction time. When the reaction time is increased to 36 h, the impurities are observed in the samples. The influences of silicon resource on the structure are much less than the crystallinity. The results show that the optimum temperature is 300 ℃, the optimum reaction time is 24 h, and the optimum silicon source is fumed silicon dioxide.
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