Open AccessSynthesis of Bi0.4Sr0.6FeO3-δ (BSF) powders and ceramics
Author(s) -
M Reales Rios,
Milton Humberto Medina Barreto,
Beatríz Cruz Muñoz
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1247/1/012014
Subject(s) - thermogravimetric analysis , materials science , ceramic , porosity , stoichiometry , composite material , polyvinyl alcohol , polyvinyl butyral , lattice constant , chemical engineering , mineralogy , diffraction , chemistry , physics , optics , engineering
By mean of mechanical alloying the synthesis of Bi 0.4 Sr 0.6 FeO 3–δ ceramic powders were achieved according to the stoichiometric relations of Bi 2 O 3 , Fe 2 O 3 and SrCO 3 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.