By means of atomic force microscope , the surface pattern , particle size distribution , and specific surface area
of La2Ti composite oxide were studied. The compound particle surface appears as a smooth sheet , the even size of the compound ranges from 19. 85 nm to 25. 38 nm. The particle seems smooth , which erects at a height from 4. 69 nm to 5.88 nm. The surface area ranges from 58. 90 nm2 to 1 238. 04 nm2 . The La2Ti composite oxide nanocrystallines enjoy a narrow and even particle size distribution and accumulate closely.