晶体生长用TiO2纳米晶的改良工艺研究

针对晶体生长的具体应用，分别以硫酸氧钛铵（ATS）和改良硫酸氧钛铵（M－ATS）为原料，采用高温焙烧法制备了TiO2纳米晶，用XRD分析了原料和纳米晶的物相，用SEM分析了纳米晶的形貌，结果表明虽然两种原料具有相似的物相结构，但所得纳米晶的性状不同，M－ATS焙烧所得纳米晶分散性更高，均匀性更好，此外，研究了焙烧温度，保温时间，急烧，缓烧等工艺条件对纳米晶形貌，物相的影响，并给出了批量制备TiO2纳米晶粉体的最佳工艺条件。

Investigation on Technological Process of Preparation of TiO2 Nanocrystal for Rutile Crystal Growth

TiO2 nanocrystal was produced by calcining at high temperature using TiOSO4.(NH4)2 SO4.H2O (ATS) and modified ATS, respectively , as raw material for synthetic rutile crystal growth. The phases of raw material and nanocrystal were measured by means of XRD and the appearance of nanocrystal was analyzed by means of SEM. As a result, it is shown that there are great difference between two kinds of nanocrystal as for shape and properties, especially TiO2 nanocrystal calcined from modified ATS is much more dispersive and homogeneous than that from ATS, although the raw materials of them have similar structure. The influence of the calcination temperature, the heating period, as well as rapid heating or slow heating etc, on the phase and appearance of the nanocrystal was also investigated. Moreover, the good technological process to produce a great quantity of TiO2 nanocrystal was presented.