图为每分钟500转搅拌速率下所得二氧化钛凝胶粒子的SEM照片。从图中可知，所得粉体尽管呈现了一定的球状形貌，但有明显的团聚现象。在较低转速下，提供的剪切作用不充分，导致了团聚形貌的出现。因此，油相溶液的添加方式为一次性添加，并且提供足够的剪切力才可获得具有较好球状形貌的二氧化钛粒子。

The picture shows the SEM photo of titanium dioxide gel particles obtained at a stirring rate of 500 revolutions per minute.  It can be seen from the figure that although the obtained powder has a certain spherical morphology, there is an obvious agglomeration phenomenon.  At lower rotational speed, the shear action provided is insufficient, resulting in the appearance of agglomeration.  Therefore, the addition method of oil phase solution is one-time addition, and providing enough shear force can obtain titanium dioxide particles with good spherical morphology.