**3.3 Microscopy analysis**

Scanning electron micrograph of LaCoO3 powders obtained by solid state synthesis at 1273 K is displayed in **Figure 7**. The perovskite LaCoO3 powders obtained consist of pre-sintered conglomerates of grains. The agglomeration tendency is due to the high calcination temperature employed to obtain the single phase. The reaction product has well-defined shape and less uniform grain size distribution. The high-temperature calcination results in severe agglomeration. The sintering of many crystallites during high thermal treatment resulted in the larger grains, which are polycrystals. The grain limits and triple junction points are well defined.
