Abstract：With sol-gel method, nanometer La-Ti composite oxide was successfully prepared at a
low temperature (750～800°C) using polyethylene glycol as dispersant. By means of atomic force
microscope, the surface pattern, particle size distribution, and specific surface area were studied.
The compound particle surface appears as a smooth sheet, the mean size of the compound is 25.38
nm. On the specific surface, the particle erects at a height of 4.69 nm. The surface area is 58.90
nm2. The La-Ti composite oxide nanocrystal prefers to narrow and even particle size distribution
and the homogeneity of surface topography.