在溶胶 -凝胶方法制备掺铁二氧化钛过程中 ,观察了不同的恒温水浴温度、不同的体系加水量对凝胶形成时间的影响 ,并对此提出了初步的解释 .采用 X射线衍射和 Voigt函数单峰分析方法计算了不同反应温度和不同体系含水量下得到的干凝胶粉在 50 0℃煅烧 3h后的晶粒度及 ( 10 1)晶面上的畸变与晶胞参数 .结合样品的透射电镜和电子衍射照片 ,分析了晶粒度与制备条件的关系 ,并作出了初步解释 .并观察到 ( 10 1)晶面上的畸变与晶粒度有着相反的变化趋势 . In the preparation of iron-doped titanium dioxide by sol-gel method, the effects of different constant temperature water bath temperature and water addition amount on the gel formation time were observed and the preliminary explanations were given.Using X-ray diffraction and Voigt function Single peak analysis method to calculate the different reaction temperature and water content of different systems obtained at a dry gel powder calcined at 50 ℃ 3h after the grain size and (10 1) crystal plane distortion and unit cell parameters combined with the sample TEM, and electron diffraction photographs, the relationship between the grain size and the preparation conditions was analyzed and a preliminary explanation was given. It is observed that the distortion and the grain size on the (10 1) plane have the opposite trend.