SEM analysis was used to determine the morphology of the
fresh OCMs while the elemental composition was studied by
EDX. The obtained particles had an irregular shape due to the kind
of preparation methods used, including a pellet crushing step.
The morphology of the surface of several OCM particles,
LSF-30Fe-Pec-P, LSF-30Fe-MM-P, LSF-30Fe-Pec-20-40 and
LSF-30Fe-Pec-MM-20-40, is shown in Fig. 2. The samples prepared
by the Pechini method (a, c) were more porous than those obtained
by mechanical mixing (b, d). Similar trends were obtained in the
BET analyses with the samples prepared by the Pechini method
having higher surface areas.