Abstract
By mean of mechanical alloying the synthesis of Bi0.4Sr0.6FeO3–δ ceramic powders were achieved according to the stoichiometric relations of Bi2O3, Fe2O3 and SrCO3 initial powders. Then thermal treatments in air both 800 °C as 825 °C as at function on time was carried out on the processed ceramic powders, which were posteriorly characterized via X-ray diffraction and thermogravimetric. Finally, uniaxial compaction of the chosen processed powders to 800 °C was performed adding polyvinyl alcohol (PVA) or butyral alcohol (PVB) try to find a higher porosity. The milled ceramic compound presented a single cubic phase with lattice parameters of 3.95Ȧ when it was thermally treated at 800 °C and only 30 min of thermal treatment. No change on lattice parameter was found with higher treatment time. Thermogravimetric analysis showed processed powder are stable to work at the operation temperature of the solid oxide fuel cell chosen. In regard to porosity, the results showed that an adequate porosity 27 % with addition of PVB was achieved.
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